CN103055532B - Polyalcohol acrylate reclaims the device of cyclohexane in producing - Google Patents

Abstract

The invention discloses during a kind of polyalcohol acrylate is produced the device reclaiming cyclohexane, it comprises: tail gas air inlet pipe (1), the compression cycle condenser (2) be connected successively by pipeline, compression surge tank (3), compression receiving tank (4), total blowdown condenser (5), emptying separator (6), total emptying receiving tank (7).Polyalcohol of the present invention (methyl) acrylate reclaims the device of cyclohexane in producing, reasonable in design, easy to operate, automaticity is high, reliable, the feature of environmental protection is good, and cyclohexane organic efficiency is high, cyclohexane content in tail gas can be reduced to less than 5%, and organic efficiency comparatively condensation method and spray process can improve more than 2 times.And compared with the method sprayed with cold water, floor space is little, more easy to operate, and security is higher.

Description

Polyalcohol acrylate reclaims the device of cyclohexane in producing

Technical field

The present invention relates to a kind of polyalcohol (methyl) acrylate production equipment, be specifically related to the device reclaiming cyclohexane during a kind of polyalcohol (methyl) acrylate is produced.

Background technology

Acrylate is widely used in resin art, double bond containing polyalcohol (methyl) acrylate that prior art adopts acrylic or methacrylic acid to generate after esterification with polyalcohol, in manufacture process, the normal cyclohexane that adopts is as solvent, after preparation technology terminates, remaining a large amount of cyclohexane in emission, mass content is up to more than 15%.The method of the domestic and international common recovery cyclohexane solvent of prior art has: 1, adopt time condenser to carry out secondary or multiple condensation method: the freezing point of cyclohexane is 6.5 DEG C, solid will be condensed into lower than this temperature, blocking pipe, therefore in acrylate preparation process, adopt the cold water of 8 ± 2 DEG C as cooling agent, condensation temperature general control is at 8 ~ 13 DEG C, because in 11 DEG C of situations, the saturated vapor pressure of cyclohexane is 6.67KPA, even if therefore the area of condenser is large again, in the tail gas of discharge, still have the cyclohexane of more than 15%.2, the method for cold water spray is adopted: directly contact with the air containing cyclohexane although the method is cold water, cooling effect improves, but though recovering effect is slightly better than multiple condensation method on the one hand, but still be subject to the restriction of the saturated vapor pressure at this temperature, recovering effect is limited, floor space is large on the one hand in addition, and operating environment is poor, and security can not get ensureing.

Therefore, necessary on the basis of prior art, design a kind of reasonable in design, easy to operate, the device that cyclohexane organic efficiency is high.

Summary of the invention

Goal of the invention: the object of the invention is, in order to solve the deficiencies in the prior art, to provide a kind of reasonable in design, easy to operate, the feature of environmental protection is good, the device that cyclohexane organic efficiency is high.

Technical scheme: in order to realize above object, the technical scheme that the present invention takes is:

A kind of polyalcohol acrylate reclaims the device of cyclohexane in producing, it comprises: tail gas air inlet pipe, the compression cycle condenser be connected with tail gas air inlet pipe, the compression surge tank be connected with compression cycle condenser, the compression receiving tank be connected with compression surge tank, the total blowdown condenser be connected with compression receiving tank, the emptying separator be connected with total blowdown condenser, the total emptying receiving tank be connected with emptying separator.

Preferably, above-described polyalcohol acrylate reclaims the device of cyclohexane in producing, be provided with compression pump between described tail gas air inlet pipe and compression cycle condenser.

Preferably, above-described polyalcohol acrylate reclaims the device of cyclohexane in producing, described compression pump is Pendular ring type compression pump.Pressure stability when liquid-piston compressor (pump) runs, reliable, adopt the mixture of water or water and cyclohexane as working solution, strong operability; The present invention screens through great many of experiments, and described compression pressure is preferably at 0.5kgf/cm²to 3.5kgf/cm²between, cyclohexane organic efficiency is high.

Preferably, above-described polyalcohol acrylate reclaims the device of cyclohexane in producing, described compression cycle condenser is provided with cooling water inlet pipe and cooling water outlet pipe.

Preferably, above-described polyalcohol acrylate reclaims the device of cyclohexane in producing, described compression surge tank is connected with running water water inlet pipe.Adopt the cold water of about 8 ± 2 DEG C to do cooling agent, cyclohexane steam is condensed into liquid reuse by heat exchange agent, exhaust emissions.

Preferably, above-described polyalcohol acrylate reclaims the device of cyclohexane in producing, described total blowdown condenser is provided with cooling water inlet pipe and cooling water outlet pipe.

Beneficial effect: polyalcohol acrylate provided by the invention reclaims cyclohexane device in producing compared with prior art has the following advantages:

Polyalcohol acrylate of the present invention reclaims the device of cyclohexane in producing, reasonable in design, easy to operate, automaticity is high, reliable, the feature of environmental protection is good, and cyclohexane organic efficiency is high, cyclohexane content in tail gas can be reduced to less than 5%, and organic efficiency comparatively condensation method and spray process can improve more than 2 times.And compared with the method sprayed with cold water, floor space is little, more easy to operate, and security is higher.

Accompanying drawing explanation

Fig. 1 is the structural representation reclaiming the device of cyclohexane during polyalcohol acrylate of the present invention is produced.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.

As shown in Figure 1, a kind of polyalcohol acrylate reclaims the device of cyclohexane in producing, it comprises: tail gas air inlet pipe (1), the compression cycle condenser (2) be connected with tail gas air inlet pipe (1), the compression surge tank (3) be connected with compression cycle condenser (2), the compression receiving tank (4) be connected with compression surge tank (3), the total blowdown condenser (5) be connected with compression receiving tank (4), the emptying separator (6) be connected with total blowdown condenser (5), the total emptying receiving tank (7) be connected with emptying separator (6).

Above-described polyalcohol acrylate reclaims the device of cyclohexane in producing, be provided with Pendular ring type compression pump (8) between described tail gas air inlet pipe (1) and compression cycle condenser (2).

Above-described polyalcohol acrylate reclaims the device of cyclohexane in producing, described compression cycle condenser (2) is provided with cooling water inlet pipe (2-1) and cooling water outlet pipe (2-2).Described total blowdown condenser (5) is provided with cooling water inlet pipe (5-1) and cooling water outlet pipe (5-2).

Above-described polyalcohol acrylate reclaims the device of cyclohexane in producing, described compression surge tank (3) is connected with running water water inlet pipe.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (2)

1. a polyalcohol acrylate reclaims the device of cyclohexane in producing, it is characterized in that, it comprises: tail gas air inlet pipe (1), the compression cycle condenser (2) be connected with tail gas air inlet pipe (1), the compression surge tank (3) be connected with compression cycle condenser (2), the compression receiving tank (4) be connected with compression surge tank (3), the total blowdown condenser (5) be connected with compression receiving tank (4), the emptying separator (6) be connected with total blowdown condenser (5), the total emptying receiving tank (7) be connected with emptying separator (6),

Between described tail gas air inlet pipe (1) and compression cycle condenser (2), compression pump (8) is installed;

Described compression cycle condenser (2) is provided with cooling water inlet pipe (2-1) and cooling water outlet pipe (2-2);

Described compression surge tank (3) is connected with running water water inlet pipe;

Described total blowdown condenser (5) is provided with cooling water inlet pipe (5-1) and cooling water outlet pipe (5-2).

2. polyalcohol acrylate according to claim 1 reclaims the device of cyclohexane in producing, and it is characterized in that, described compression pump (8) is Pendular ring type compression pump.