技术领域technical field
本发明属于沼气制取设备技术领域，特别涉及一种秸秆产沼气资源化系统。The invention belongs to the technical field of biogas production equipment, and in particular relates to a biogas resource utilization system produced from straws.
背景技术Background technique
我国是一个农业大国，农作物播种面积居世界第一位，据统计，目前我国每年秸秆产量大约有7亿吨。在过去农作物秸秆多被作为燃料使用，但随着我国人民生活水平的不断提高，以及农村经济的发展和能源供应的改善，近些年来，农民对秸秆的燃烧利用也逐渐减少，剩余农作物秸秆的数量越来越大，据估计每年已达到4亿吨左右。大量剩余秸秆的随地堆弃和任意焚烧，造成了大气污染、土壤矿化、火灾事故、堵塞交通等大量的社会、经济和生态问题；与此同时，秸秆作为一种可再生能源，蕴含着巨大的生物质能量，它的资源化利用，对节约能源、改善生态环境、实现社会的可持续发展，有着重大意义。my country is a large agricultural country, and the sown area of crops ranks first in the world. According to statistics, my country currently produces about 700 million tons of straw every year. In the past, crop straws were mostly used as fuel, but with the continuous improvement of people's living standards in our country, as well as the development of rural economy and the improvement of energy supply, in recent years, farmers' burning and utilization of straws have gradually decreased, and the remaining crop straws The quantity is getting bigger and bigger, and it is estimated that it has reached about 400 million tons per year. The dumping and random burning of a large amount of surplus straw has caused a large number of social, economic and ecological problems such as air pollution, soil mineralization, fire accidents, and traffic jams; at the same time, straw, as a renewable energy source, contains huge Biomass energy and its resource utilization are of great significance to energy conservation, improvement of the ecological environment, and realization of sustainable social development.
秸秆产沼气是将水稻、玉米、花生等农作物秸秆作为原料，秸秆经过预处理后，加入沼气池或者沼气罐中进行厌氧发酵来生产沼气和有机肥料。Straw biogas production uses rice, corn, peanut and other crop straws as raw materials. After the straws are pretreated, they are added to biogas digesters or biogas tanks for anaerobic fermentation to produce biogas and organic fertilizers.
秸秆原料的预处理环节至关重要，其关系到原料分解效率及发酵产气率。传统的预处理环节包括对秸秆进行粉碎以及添加发酵菌剂做堆沤等。但是秸秆的细胞非常坚实，细胞壁结构高度木质化，其中的木质素构成细胞壁的15％-30％，且这些木质素中含有生物化学性质十分稳定的各种复杂结合形式，难于被一般的微生物分解。因此，在秸秆发酵过程中，木质纤维素水解过程缓慢、水解程度低，从而影响随后的酸化和气化过程。The pretreatment of straw raw materials is very important, which is related to the decomposition efficiency of raw materials and the rate of fermentation gas production. The traditional pretreatment process includes crushing the straw and adding fermentation agents for stacking and retting. However, the cells of straw are very solid, and the cell wall structure is highly lignified. The lignin in it constitutes 15%-30% of the cell wall, and these lignins contain various complex combinations with very stable biochemical properties, which are difficult to be decomposed by general microorganisms. . Therefore, during the straw fermentation process, the hydrolysis process of lignocellulose is slow and the degree of hydrolysis is low, which affects the subsequent acidification and gasification process.
发明内容Contents of the invention
本发明的目的在于克服现有技术的不足，提供一种秸秆产沼气资源化系统，其采用高压蒸汽和微波照射相结合的方法使秸秆中的坚实木质纤维素软化，从而使秸秆原料在发酵产沼气过程中有效提高秸秆原料的分解效率及发酵产气率。The purpose of the present invention is to overcome the deficiencies of the prior art and provide a biogas recycling system from straws, which uses a combination of high-pressure steam and microwave irradiation to soften the solid lignocellulose in straws, so that straw raw materials In the biogas process, the decomposition efficiency of straw raw materials and the fermentation gas production rate are effectively improved.
本发明采用以下技术方案来实现：The present invention adopts following technical scheme to realize:
一种秸秆产沼气资源化系统，包括秸秆粉碎机、高压预处理罐、蒸汽发生器、集料箱、发酵罐、固液分离器、沼渣储存箱、沼液储存箱，所述秸秆粉碎机与高压预处理罐相连；高压预处理罐与集料箱相连；集料箱与发酵罐相连；发酵罐与固液分离器相连；固液分离器分别与沼渣储存箱和沼液储存箱相连；A biogas recycling system for straw production, comprising a straw pulverizer, a high-pressure pretreatment tank, a steam generator, a collection box, a fermentation tank, a solid-liquid separator, a biogas residue storage tank, and a biogas slurry storage tank. The straw pulverizer Connected with high-pressure pretreatment tank; high-pressure pretreatment tank connected with collection tank; collection tank connected with fermentation tank; fermentation tank connected with solid-liquid separator; solid-liquid separator connected with biogas residue storage tank and biogas slurry storage tank respectively ;
所述高压预处理罐设置有蒸汽入口、高压预处理罐进料口、高压预处理罐出料口、蒸汽出口、减压阀、微波馈口，以及防爆口；所述减压阀设置在蒸汽出口处，通过减压阀使高压预处理罐内保持在固定压力；所述微波馈口与微波发生器相连，微波发生器产生微波并通过微波馈口向高压预处理罐内发射微波促进秸秆中的坚实木质纤维素软化；所述防爆口的作用是防止因高压预处理罐内的压力过大而产生爆炸；The high-pressure pretreatment tank is provided with a steam inlet, a high-pressure pretreatment tank feed port, a high-pressure pretreatment tank discharge port, a steam outlet, a pressure reducing valve, a microwave feed port, and an explosion-proof port; the pressure reducing valve is arranged on the steam At the outlet, the high-pressure pretreatment tank is kept at a fixed pressure through a pressure reducing valve; the microwave feeder is connected to a microwave generator, and the microwave generator generates microwaves and emits microwaves into the high-pressure pretreatment tank through the microwave feeder to promote the straw infusion. The solid lignocellulose is softened; the effect of the explosion-proof port is to prevent explosion due to excessive pressure in the high-pressure pretreatment tank;
所述蒸汽发生器内部设置有加热电阻丝；蒸汽发生器通过高压蒸汽管道与高压预处理罐的蒸汽入口相连通，在蒸汽发生器和蒸汽入口相连通的高压蒸汽管道上设置有阀门。A heating resistance wire is arranged inside the steam generator; the steam generator communicates with the steam inlet of the high-pressure pretreatment tank through a high-pressure steam pipeline, and a valve is arranged on the high-pressure steam pipeline connected between the steam generator and the steam inlet.
所述高压预处理罐出料口与集料箱连接，集料箱用于收集高压预处理罐出料口排出的预处理好的秸秆原料；The outlet of the high-pressure pretreatment tank is connected to a collection box, and the collection box is used to collect the pretreated straw raw materials discharged from the outlet of the high-pressure pretreatment tank;
所述发酵罐的外壁设置有保温层，发酵罐顶端设置有出气口和发酵液添加口；发酵罐底端设置有发酵罐出料口；发酵罐顶端设置有发酵罐进料口；The outer wall of the fermenter is provided with an insulating layer, and the top of the fermenter is provided with an air outlet and a fermentation liquid addition port; the bottom of the fermenter is provided with a discharge port of the fermenter; the top of the fermenter is provided with a feed port of the fermenter;
所述集料箱通过第二传送带与发酵罐的发酵罐进料口相连，将集料箱中的预处理好的秸秆原料送入发酵罐中进行发酵；The collection box is connected to the feed port of the fermentation tank through the second conveyor belt, and the pretreated straw raw material in the collection box is sent into the fermentation tank for fermentation;
所述固液分离器包括电机、轴、固定外套筒、旋转内套筒，其中，旋转内套筒为圆筒形结构，其左端设置有出渣口，旋转内套筒的筒壁上设置有通孔；旋转内套筒同轴设置在固定外套筒的内部；轴同轴设置在固定外套筒内部，轴上固定设置有螺旋桨叶；旋转内套筒通过连接杆与轴固定连接，轴与电机相连，电机通过轴以及连接杆可以带动旋转内套筒在固定外套筒内同轴旋转；固定外套筒设置有凸起外壁，凸起外壁和旋转内套筒之间形成集液腔，凸起外壁上设置有出液口，固定外套筒设置有进料口；所述固液分离器通过管道与发酵罐出料口相连通；固液分离器通过管道分别与沼渣储存箱和沼液储存箱相连。通过固液分离器可将发酵之后的沼渣和沼液分离，沼渣存入沼渣储存箱作为有机肥料，沼液流入沼液储存箱作为叶面肥料。使用时，启动电机，电机带动轴旋转，通过轴上固定的螺旋桨叶的作用使沼渣和沼液的混合物从进料口进入装置内部。同时，轴带动旋转内套筒在固定外套筒内同轴旋转，利用旋转产生的离心力，使沼液透过旋转内套筒的通孔进入集液腔，再从出液口排出。沼渣则从出渣口排出。The solid-liquid separator includes a motor, a shaft, a fixed outer sleeve, and a rotating inner sleeve, wherein the rotating inner sleeve is a cylindrical structure, and a slag outlet is provided at its left end, and the wall of the rotating inner sleeve is provided with There are through holes; the rotating inner sleeve is coaxially arranged inside the fixed outer sleeve; the shaft is coaxially arranged inside the fixed outer sleeve, and the propeller blade is fixedly arranged on the shaft; the rotating inner sleeve is fixedly connected to the shaft through a connecting rod, The shaft is connected with the motor, and the motor can drive the rotating inner sleeve to rotate coaxially in the fixed outer sleeve through the shaft and the connecting rod; the fixed outer sleeve is provided with a raised outer wall, and a liquid collection is formed between the raised outer wall and the rotating inner sleeve cavity, the raised outer wall is provided with a liquid outlet, and the fixed outer sleeve is provided with a feed inlet; the solid-liquid separator is connected to the outlet of the fermenter through a pipeline; the solid-liquid separator is stored with biogas residue through a pipeline The tank is connected to the biogas slurry storage tank. The fermented biogas residue and biogas slurry can be separated by a solid-liquid separator. The biogas residue is stored in the biogas residue storage tank as organic fertilizer, and the biogas slurry flows into the biogas slurry storage tank as foliar fertilizer. When in use, start the motor, the motor drives the shaft to rotate, and the mixture of biogas residue and biogas slurry enters the device from the feed port through the action of the propeller blades fixed on the shaft. At the same time, the shaft drives the rotating inner sleeve to rotate coaxially in the fixed outer sleeve. Using the centrifugal force generated by the rotation, the biogas slurry enters the liquid collection chamber through the through hole of the rotating inner sleeve, and then is discharged from the liquid outlet. Biogas residue is discharged from the slag outlet.
在上述技术方案中，所述高压预处理罐还设置有温度传感器和压力传感器，用于实时监测高压预处理罐内的温度和压力，当检测的温度或者压力过高时关闭蒸汽发生器。In the above technical solution, the high-pressure pretreatment tank is also provided with a temperature sensor and a pressure sensor for real-time monitoring of the temperature and pressure in the high-pressure pretreatment tank, and shuts down the steam generator when the detected temperature or pressure is too high.
在上述技术方案中，所述微波馈口包括两个，其对称设置在高压预处理罐的罐壁上。In the above technical solution, the microwave feed port includes two, which are symmetrically arranged on the tank wall of the high-pressure pretreatment tank.
在上述技术方案中，所述秸秆粉碎机通过第一传送带与高压预处理罐进料口相连。In the above technical solution, the straw pulverizer is connected to the feed port of the high-pressure pretreatment tank through the first conveyor belt.
本发明结构简单，自动化程度高，其采用高压蒸汽和微波照射相结合的方法使秸秆中的坚实木质纤维素软化，从而使秸秆原料在发酵产沼气过程中有效提高秸秆原料的分解效率及发酵产气率。The invention has a simple structure and a high degree of automation. It adopts the method of combining high-pressure steam and microwave irradiation to soften the solid lignocellulose in the straw, thereby effectively improving the decomposition efficiency of the straw raw material and the fermentation yield of the straw raw material in the process of fermenting biogas. Gas rate.
附图说明Description of drawings
图1是本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
图2是发明中的固液分离器的结构示意图。Fig. 2 is a schematic structural view of the solid-liquid separator in the invention.
图中：1为高压预处理罐、2为蒸汽发生器、3为秸秆粉碎机、4为集料箱、5为发酵罐、6为固液分离器、7为沼渣储存箱、8为沼液储存箱、1-1为高压预处理罐进料口、1-2为蒸汽出口、1-3为减压阀、1-4为温度传感器、1-5为压力传感器、1-6为微波馈口、1-7为蒸汽入口、1-8为高压预处理罐出料口、2-1为加热电阻丝、2-2为阀门、3-1为第一传送带、4-1为第二传送带、5-1为发酵液添加口、5-2为电机、5-3为出气口、5-4为保温层、5-5为搅拌器、5-6为发酵罐出料口、6-1为电机、6-2为轴、6-3为固定外套筒、6-4为旋转内套筒、6-5为进料口、6-6为螺旋桨叶、6-7为连接杆、6-8为凸起外壁、6-9为出渣口、6-10为集液腔、6-11为通孔、6-12为出液口。In the figure: 1 is a high-pressure pretreatment tank, 2 is a steam generator, 3 is a straw grinder, 4 is a collection box, 5 is a fermentation tank, 6 is a solid-liquid separator, 7 is a biogas residue storage tank, and 8 is a biogas Liquid storage tank, 1-1 is the inlet of the high-pressure pretreatment tank, 1-2 is the steam outlet, 1-3 is the pressure reducing valve, 1-4 is the temperature sensor, 1-5 is the pressure sensor, 1-6 is the microwave Feed port, 1-7 is the steam inlet, 1-8 is the discharge port of the high pressure pretreatment tank, 2-1 is the heating resistance wire, 2-2 is the valve, 3-1 is the first conveyor belt, 4-1 is the second Conveyor belt, 5-1 is the inlet of fermentation liquid, 5-2 is the motor, 5-3 is the air outlet, 5-4 is the insulation layer, 5-5 is the agitator, 5-6 is the outlet of the fermentation tank, 6- 1 is the motor, 6-2 is the shaft, 6-3 is the fixed outer sleeve, 6-4 is the rotating inner sleeve, 6-5 is the feed inlet, 6-6 is the propeller blade, 6-7 is the connecting rod, 6-8 is a raised outer wall, 6-9 is a slag outlet, 6-10 is a liquid collection chamber, 6-11 is a through hole, and 6-12 is a liquid outlet.
具体实施方式Detailed ways
下面结合具体实施例进一步说明本发明的技术方案。The technical solutions of the present invention will be further described below in conjunction with specific embodiments.
如附图1所示，本发明所涉及的一种秸秆产沼气资源化系统，包括秸秆粉碎机、高压预处理罐、蒸汽发生器、集料箱、发酵罐、固液分离器、沼渣储存箱、沼液储存箱，所述秸秆粉碎机与高压预处理罐相连；高压预处理罐与集料箱相连；集料箱与发酵罐相连；发酵罐与固液分离器相连；固液分离器分别与沼渣储存箱和沼液储存箱相连。As shown in Figure 1, a biogas recycling system involving straw production in the present invention includes a straw pulverizer, a high-pressure pretreatment tank, a steam generator, a collection box, a fermentation tank, a solid-liquid separator, and biogas residue storage tank, biogas slurry storage tank, the straw pulverizer is connected with the high-pressure pretreatment tank; the high-pressure pretreatment tank is connected with the collection tank; the collection tank is connected with the fermentation tank; the fermentation tank is connected with the solid-liquid separator; They are respectively connected with the biogas residue storage tank and the biogas slurry storage tank.
所述高压预处理罐1设置有蒸汽入口1-7、高压预处理罐进料口1-1、高压预处理罐出料口1-8、蒸汽出口1-2、减压阀1-3、微波馈口1-6，以及防爆口(图中未标出)；所述减压阀1-3设置在蒸汽出口1-2处，通过减压阀使高压预处理罐1内保持在固定压力；所述微波馈口1-6与微波发生器(图中未标出)相连，微波发生器产生微波并通过微波馈口向高压预处理罐内发射微波促进秸秆中的坚实木质纤维素软化；所述防爆口的作用是防止因高压预处理罐内的压力过大而产生爆炸。The high pressure pretreatment tank 1 is provided with a steam inlet 1-7, a high pressure pretreatment tank feed port 1-1, a high pressure pretreatment tank discharge port 1-8, a steam outlet 1-2, a pressure reducing valve 1-3, Microwave feeding port 1-6, and explosion-proof port (not marked in the figure); Described pressure reducing valve 1-3 is arranged at steam outlet 1-2 place, keeps in the high-pressure pretreatment tank 1 at fixed pressure by pressure reducing valve ; The microwave feed port 1-6 is connected with a microwave generator (not marked in the figure), and the microwave generator generates microwaves and emits microwaves into the high-pressure pretreatment tank through the microwave feed port to promote the softening of the solid lignocellulose in the straw; The function of the explosion-proof port is to prevent explosion due to excessive pressure in the high-pressure pretreatment tank.
所述秸秆粉碎机3通过第一传送带3-1与高压预处理罐进料口1-1相连。The straw pulverizer 3 is connected to the feed port 1-1 of the high-pressure pretreatment tank through the first conveyor belt 3-1.
所述蒸汽发生器2内部设置有加热电阻丝2-1；蒸汽发生器2通过高压蒸汽管道与高压预处理罐1的蒸汽入口1-7相连通，在蒸汽发生器2和蒸汽入口1-7相连通的高压蒸汽管道上设置有阀门2-2。The inside of the steam generator 2 is provided with a heating resistance wire 2-1; the steam generator 2 communicates with the steam inlet 1-7 of the high-pressure pretreatment tank 1 through a high-pressure steam pipeline, and the steam generator 2 and the steam inlet 1-7 The connected high-pressure steam pipeline is provided with a valve 2-2.
所述高压预处理罐出料口1-8与集料箱4连接，集料箱用于收集高压预处理罐出料口排出的预处理好的秸秆原料。The outlets 1-8 of the high-pressure pretreatment tank are connected to the collection box 4, and the collection box is used to collect the pretreated straw raw materials discharged from the outlet of the high-pressure pretreatment tank.
所述发酵罐5的外壁设置有保温层5-4，发酵罐顶端设置有出气口5-3和发酵液添加口5-1；发酵罐底端设置有发酵罐出料口5-6；发酵罐顶端设置有发酵罐进料口。The outer wall of the fermentor 5 is provided with an insulating layer 5-4, and the top of the fermentor is provided with an air outlet 5-3 and a fermentation liquid addition port 5-1; the bottom of the fermentor is provided with a fermentor outlet 5-6; The top of the tank is provided with a fermenter feed port.
所述集料箱4通过第二传送带4-1与发酵罐5的发酵罐进料口相连，将集料箱中的预处理好的秸秆原料送入发酵罐中进行发酵。The collection box 4 is connected to the feed port of the fermentation tank 5 through the second conveyor belt 4-1, and the pretreated straw raw material in the collection box is sent into the fermentation tank for fermentation.
如附图2所示，所述固液分离器6包括电机、轴、固定外套筒、旋转内套筒，其中，旋转内套筒6-4为圆筒形结构，其左端设置有出渣口6-9，旋转内套筒6-4的筒壁上设置有通孔6-11；旋转内套筒6-4同轴设置在固定外套筒6-3的内部；轴6-2同轴设置在固定外套筒6-3内部，轴6-2上固定设置有螺旋桨叶6-6；旋转内套筒6-4通过连接杆6-7与轴6-2固定连接，轴6-2与电机6-1相连，电机通过轴以及连接杆可以带动旋转内套筒在固定外套筒内同轴旋转；固定外套筒6-3设置有凸起外壁6-8，凸起外壁6-8和旋转内套筒6-4之间形成集液腔6-10，凸起外壁6-8上设置有出液口6-12，固定外套筒6-3设置有进料口6-5。使用时，启动电机，电机带动轴旋转，通过轴上固定的螺旋桨叶的作用使沼渣和沼液的混合物从进料口进入装置内部。同时，轴带动旋转内套筒在固定外套筒内同轴旋转，利用旋转产生的离心力，使沼液透过旋转内套筒的通孔进入集液腔，再从出液口排出。沼渣则从出渣口排出。As shown in Figure 2, the solid-liquid separator 6 includes a motor, a shaft, a fixed outer sleeve, and a rotating inner sleeve, wherein the rotating inner sleeve 6-4 is a cylindrical structure, and its left end is provided with a slag outlet Port 6-9, the wall of the rotating inner sleeve 6-4 is provided with a through hole 6-11; the rotating inner sleeve 6-4 is coaxially arranged inside the fixed outer sleeve 6-3; the shaft 6-2 is the same as The shaft is arranged inside the fixed outer sleeve 6-3, and the propeller blade 6-6 is fixedly arranged on the shaft 6-2; the rotating inner sleeve 6-4 is fixedly connected with the shaft 6-2 through the connecting rod 6-7, and the shaft 6- 2. Connected with the motor 6-1, the motor can drive the rotating inner sleeve to rotate coaxially in the fixed outer sleeve through the shaft and the connecting rod; the fixed outer sleeve 6-3 is provided with a raised outer wall 6-8, and the raised outer wall 6 -8 and the rotating inner sleeve 6-4 form a liquid collection chamber 6-10, the raised outer wall 6-8 is provided with a liquid outlet 6-12, and the fixed outer sleeve 6-3 is provided with a feed port 6- 5. When in use, start the motor, the motor drives the shaft to rotate, and the mixture of biogas residue and biogas slurry enters the device from the feed port through the action of the propeller blades fixed on the shaft. At the same time, the shaft drives the rotating inner sleeve to rotate coaxially in the fixed outer sleeve. Using the centrifugal force generated by the rotation, the biogas slurry enters the liquid collection chamber through the through hole of the rotating inner sleeve, and then is discharged from the liquid outlet. Biogas residue is discharged from the slag outlet.
所述固液分离器6通过管道与发酵罐出料口5-6相连通；固液分离器通过管道分别与沼渣储存箱7和沼液储存箱8相连。通过固液分离器可将发酵之后的沼渣和沼液分离，沼渣存入沼渣储存箱作为有机肥料，沼液流入沼液储存箱作为叶面肥料。The solid-liquid separator 6 is connected to the discharge port 5-6 of the fermenter through pipelines; the solid-liquid separator is connected to the biogas residue storage tank 7 and the biogas slurry storage tank 8 through pipelines. The fermented biogas residue and biogas slurry can be separated by a solid-liquid separator. The biogas residue is stored in the biogas residue storage tank as organic fertilizer, and the biogas slurry flows into the biogas slurry storage tank as foliar fertilizer.
所述高压预处理罐1还设置有温度传感器1-4和压力传感器1-5，用于实时监测高压预处理罐内的温度和压力，当检测的温度或者压力过高时关闭蒸汽发生器。The high-pressure pretreatment tank 1 is also provided with a temperature sensor 1-4 and a pressure sensor 1-5 for real-time monitoring of the temperature and pressure in the high-pressure pretreatment tank, and shuts down the steam generator when the detected temperature or pressure is too high.
所述微波馈口包括两个，其对称设置在高压预处理罐的罐壁上。The microwave feed port includes two, which are symmetrically arranged on the tank wall of the high-pressure pretreatment tank.
以上对本发明做了示例性的描述，应该说明的是，在不脱离本发明的核心的情况下，任何简单的变形、修改或者其他本领域技术人员能够不花费创造性劳动的等同替换均落入本发明的保护范围。The present invention has been described as an example above, and it should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacements that can be made by those skilled in the art without creative labor all fall within the scope of this invention. protection scope of the invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191633.XACN104762202A (en) | 2015-04-21 | 2015-04-21 | Straw Biogas Recycling System |
| CN201610409714.7ACN106047680A (en) | 2015-04-21 | 2015-04-21 | System for preparing biogas by utilizing straw |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191633.XACN104762202A (en) | 2015-04-21 | 2015-04-21 | Straw Biogas Recycling System |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610409714.7ADivisionCN106047680A (en) | 2015-04-21 | 2015-04-21 | System for preparing biogas by utilizing straw |
| Publication Number | Publication Date |
|---|---|
| CN104762202Atrue CN104762202A (en) | 2015-07-08 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510191633.XAPendingCN104762202A (en) | 2015-04-21 | 2015-04-21 | Straw Biogas Recycling System |
| CN201610409714.7APendingCN106047680A (en) | 2015-04-21 | 2015-04-21 | System for preparing biogas by utilizing straw |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610409714.7APendingCN106047680A (en) | 2015-04-21 | 2015-04-21 | System for preparing biogas by utilizing straw |
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| WD01 | Invention patent application deemed withdrawn after publication | Application publication date:20150708 |