Air column type active coke regenerated gas sealing deviceTechnical Field
The invention belongs to the technical field of environment-friendly active coke desulfurization, and particularly relates to a gas column type active coke regenerated gas sealing device.
Background
With the improvement of industrial flue gas emission standards, a flue gas purification system for sintering production gradually becomes an essential procedure, and at present, the flue gas purification mainly comprises dry-process and wet-process desulfurization and denitration processes. In particular, the active coke dry desulfurization and denitrification process has become the preferred scheme of the sintering flue gas purification method for the last two years. In the active coke flue gas purification engineering, active coke absorbs sulfur dioxide in an adsorption tower, the active coke with saturated adsorption is sent into a regeneration tower, after passing through a preheating section and a heating section, regenerated gas is released in the regeneration tower, and the active coke which is recovered after the regenerated gas is released leaves the regeneration tower and is then sent to the adsorption tower to absorb sulfur dioxide, and the reciprocating cycle work is performed. The active coke particles are mixed with the regenerated gas in the regeneration tower, the regenerated gas forms negative pressure in the middle of the regeneration tower by virtue of the suction force of a fan in an acid preparation area, so that the regenerated gas released by the active coke is converged and pumped to an acid preparation system, however, when the negative pressure in the middle of the regeneration tower is smaller, when the active coke leaves the regeneration tower, part of the regenerated gas leaves the regeneration tower along with the active coke particles, sulfuric acid can be generated when the air is encountered at a feed opening, equipment at the feed opening and the feed opening is corroded, and even sulfur dioxide escapes outside when serious; when the negative pressure in the middle of the regeneration tower is larger, air can flow back into the regeneration tower along the reverse direction of the running of active coke particles at the position where active coke leaves the regeneration tower, and the regeneration tower can be corroded in a large area when meeting with regenerated gas.
At present, nitrogen is added to the part of the regeneration tower running at home where active coke particles leave the regeneration tower, so as to isolate air and seal regenerated gas. However, the actual effect is not ideal, because the influence of the working pressure in the regeneration tower is very large, when the negative pressure in the middle part of the regeneration tower is smaller, when active coke leaves the regeneration tower, part of regeneration gas still leaves the regeneration tower along with active coke particles, sulfuric acid can be generated when air is encountered at the feed opening, equipment at the feed opening and the feed opening is corroded, and even sulfur dioxide escapes when serious occurs; when the negative pressure in the middle of the regeneration tower is too large, air can flow back into the regeneration tower along with nitrogen at the position where the active coke leaves the regeneration tower and along with the reverse direction of the running of active coke particles, and the regeneration tower can be corroded in a large area when meeting the regenerated gas.
The factors of the phenomena are many, and the phenomena are possibly caused by extreme pressure change in the regeneration tower, extreme temperature change of active coke materials in the regeneration tower, moving speed of the active coke materials in the regeneration tower and the like, so that equipment is corroded, and the service life of the equipment is greatly shortened.
Therefore, sealing the regeneration gas from air is particularly important in active coke desulfurization processes, and the current way of independently filling nitrogen into the feed opening is unstable and unsuitable.
Disclosure of Invention
The invention aims to provide a gas column type active coke regenerated gas sealing device which is not influenced by process production environment changes, so as to solve the problem of corrosion of related equipment at a feed opening of a regeneration tower and truly realize stable sealing of regenerated gas to isolate air.
The aim of the invention is realized by the following technical scheme:
the invention relates to a gas column type active coke regenerated gas sealing device, which is characterized by comprising a feeding end transition cylinder connected with an active Jiao Liu trough I through a flange, a feeding end ring type gas distribution device fixedly connected with the bottom of the feeding end transition cylinder, a gas column area chute cylinder fixedly connected with the bottom of the feeding end ring type gas distribution device, a discharge end ring type gas distribution device fixedly connected with the bottom of the gas column area chute cylinder, a discharge end transition cylinder fixedly connected with the bottom of the discharge end ring type gas distribution device, the discharge end transition cylinder connected with an active Jiao Liu trough II through a flange,
the feeding end ring type gas distribution device is communicated with the feeding end gas source connecting pipe, the discharging end ring type gas distribution device is communicated with the discharging end gas source connecting pipe, the feeding end ring type gas distribution device is communicated with the gas column area chute barrel, the discharging end ring type gas distribution device is communicated with the gas column area chute barrel, and the feeding end gas source connecting pipe and the discharging end gas source connecting pipe are both communicated with N2 The air source main pipe is connected.
The feeding end ring type gas distribution device comprises a gas cavity inner wall I connected with the gas column area chute barrel, a gas cavity outer wall I arranged on the outer side of the gas cavity inner wall I, and a ring-shaped gas cavity I arranged between the gas cavity inner wall I and the gas cavity outer wall I, wherein the gas column area chute barrel is circumferentially arranged and arranged with a group of gas injection holes I on the gas cavity inner wall I, the group of gas injection holes I are communicated with the inside of the gas column area chute barrel, and a feeding end gas source connecting pipe penetrates through the gas cavity outer wall I to be communicated with the ring-shaped gas cavity I.
The discharge end ring type gas distribution device comprises a gas cavity inner wall II connected with the gas column area chute barrel, a gas cavity outer wall II arranged on the outer side of the gas cavity inner wall II, and an annular gas cavity II arranged between the gas cavity inner wall II and the gas cavity outer wall II, wherein a group of gas injection holes II are circumferentially arranged on the gas column area chute barrel and are formed in the gas cavity inner wall II, the group of gas injection holes II are communicated with the inside of the gas column area chute barrel, and a discharge end gas source connecting pipe penetrates through the gas cavity outer wall II to be communicated with the annular gas cavity II.
The air jet hole I is in a truncated cone shape, and an outlet forms an angle of 75 degrees with the inner wall of the chute barrel in the air column area along the material flow direction.
The air jet hole II is in a truncated cone shape, and an angle of 105 degrees is formed between the outlet and the inner wall of the chute barrel in the air column area along the material flow direction.
The number of the group of air injection holes I is 12.
The number of the group of air injection holes II is 12.
The invention has the advantages that:
(1) The gas column type active coke regenerated gas sealing device forms an isobaric gas column in the device, is not influenced by the pressure in the regeneration tower, the temperature of active coke materials in the regeneration tower, the moving speed of the active coke materials in the regeneration tower and other process production environment changes under the condition that the running state of active coke particles is not influenced, and really achieves the purposes of sealing regenerated gas and isolating outside air;
(2) The invention relates to an air column type active coke regenerated gas sealing device, wherein an isobaric air column is formed at the upper center and the lower center of a chute barrel in an air column zone, and the pressure of the isobaric air column can be regulated by regulating the pressure of an external supply air source main pipe;
(3) The gas column type active coke regenerated gas sealing device is integrally mechanically connected, has stable performance, is maintenance-free and has long service life.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of the bottom feed flow of the regeneration tower of the present invention.
Fig. 3 is A-A view of fig. 1 in accordance with the present invention.
Detailed Description
Specific embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the gas seal device for gas column type active coke regeneration gas seal device of the invention is characterized by comprising a feeding end transition cylinder 4 connected with an active Jiao Liu material tank I1 through a flange 2, a feeding end ring type gas distribution device 6 fixedly connected with the bottom of the feeding end transition cylinder 4, a gas column area chute cylinder 7 fixedly connected with the bottom of the feeding end ring type gas distribution device 6, a discharge end ring type gas distribution device 9 fixedly connected with the bottom of the gas column area chute cylinder 7, a discharge end transition cylinder 10 fixedly connected with the bottom of the discharge end ring type gas distribution device 9, the discharge end transition cylinder 10 connected with an active Jiao Liu material tank II 3 through a flange 2,
the feeding end ring type gas distribution device 6 is communicated with a feeding end gas source connecting pipe 5, the discharging end ring type gas distribution device 9 is communicated with a discharging end gas source connecting pipe 8, the feeding end ring type gas distribution device 6 is communicated with the gas column area chute barrel 7, the discharging end ring type gas distribution device 9 is communicated with the gas column area chute barrel 7, the feeding end gas source connecting pipe 5 and the discharging end gas source connecting pipe 8 are both communicated with N2 The air source main pipe is connected.
The feeding end ring type gas distribution device 6 comprises an air cavity inner wall I connected with the air column area chute barrel 7, an air cavity outer wall I arranged on the outer side of the air cavity inner wall I, an annular air cavity I6-1 arranged between the air cavity inner wall I and the air cavity outer wall I, a group of gas injection holes I6-2 which are circumferentially arranged along the air column area chute barrel 7 and arranged on the air cavity inner wall I, the group of gas injection holes I6-2 are communicated with the inside of the air column area chute barrel 7, and the feeding end gas source connecting pipe 5 penetrates through the air cavity outer wall I to be communicated with the annular air cavity I6-1.
The discharge end ring type gas distribution device comprises a gas cavity inner wall II connected with the gas column area chute barrel, a gas cavity outer wall II arranged on the outer side of the gas cavity inner wall II, and an annular gas cavity II arranged between the gas cavity inner wall II and the gas cavity outer wall II, wherein a group of gas injection holes II are circumferentially arranged and arranged on the gas column area chute barrel 7 and are communicated with the inside of the gas column area chute barrel 7, and a discharge end gas source connecting pipe 8 penetrates through the gas cavity outer wall II and is communicated with the annular gas cavity II.
The air injection hole I6-2 is in a truncated cone shape, and an outlet forms an angle of 75 degrees with the inner wall of the chute barrel 7 in the air column area along the material flow direction.
The air jet hole II is in a truncated cone shape, and an outlet forms an angle of 105 degrees with the inner wall of the chute barrel 7 in the air column area along the material flow direction.
The number of the group of air injection holes I6-2 is 12.
The number of the group of air injection holes II is 12.
The invention relates to a gas sealing device for gas column type active coke regenerated gas, wherein an active Jiao Liu trough I1 contains SO2 The lower part of the regeneration tower is connected with an active coke release area of the regeneration tower through a flange 2, the lower part of the regeneration tower is communicated with an air column type active coke regenerated air sealing device, the lower part of the air column type active coke regenerated air sealing device is also connected with an active Jiao Liu trough II 3 through the flange 2, and the active Jiao Liu trough II 3 is connected with a feed opening to form a material sliding channel. The active coke particles and the mixture of the regenerated gas released in the regeneration tower enter an active coke chute I1, the active coke particles continue to run downwards under the action of gravity and enter a gas column type active coke regenerated gas sealing device, but the regenerated gas is reversely pushed back to a regeneration tower release area under the action of the pressure of nitrogen in the gas column type active coke regenerated gas sealing device; active coke particles in the gas seal device of the gas column type active coke regenerated gas continue to run downwards under the action of gravity, leave the gas seal device of the gas column type active coke regenerated gas and pass through an active Jiao Liu material groove II 3 (containing N)2 ) And the discharging device of the discharging opening leaves the regeneration tower, and air at the discharging opening is pushed away under the pressure of nitrogen in the air column type active coke regenerated gas sealing device, so that the purposes of sealing regenerated gas and isolating outside air are realized.
The gas column type active coke regenerated gas sealing device mainly comprises a feeding end transition cylinder 4, a feeding end gas source connecting pipe 5, a feeding end ring type gas distribution device 6, a gas column area chute cylinder 7, a discharging end gas source connecting pipe 8, a discharging end ring type gas distribution device 9 and a discharging end transition cylinder 10, wherein one end of the feeding end transition cylinder 4 is welded with a flange 2, and the other end is connected with the feeding end ring type gas distribution device 6; the feeding end air source connecting pipe 5 is vertically welded on the feeding end annular air distribution device 6, and the inner cavity of the feeding end air source connecting pipe 5 is communicated with an annular air cavity I6-1 of the feeding end annular air distribution device 6; the inner wall I of the air cavity of the feeding end ring type air distribution device 6 is uniformly provided with 12 air injection holes I6-2, the air injection holes I6-2 are round tables, and an outlet forms an angle of 75 degrees with the inner wall of the air column area chute barrel 7 along the material flow direction and points to the central area of the upper part of the air column area chute barrel 7. The lower part of the feeding end ring type gas distribution device 6 is connected with a gas column area chute barrel 7; the other end of the chute barrel 7 in the air column area is connected with the upper part of a discharge end ring type air distribution device 9; the discharge end air source connecting pipe 8 is also vertically welded on the discharge end annular air distribution device 9, and the inner cavity of the discharge end air source connecting pipe 8 is communicated with an annular air cavity II of the discharge end annular air distribution device 9; the inner wall II of the air cavity of the discharge end ring type air distribution device 9 is uniformly provided with 12 air holes II, the air holes II are round tables, and an outlet forms an angle of 105 degrees with the inner wall of the air column area chute barrel 7 along the material flow direction and points to the central area of the lower part of the air column area chute barrel 7; the discharge end ring type gas distribution device 9 is connected with a discharge end transition cylinder 10, and the other end of the discharge end transition cylinder 10 is connected with the flange 2.
When the gas seal device for the regenerated gas of the gas column type active coke works, the gas source connecting pipe 5 at the feeding end and the gas source connecting pipe 8 at the discharging end are simultaneously connected with a gas source from one N2 The air source main pipe can ensure that the air source pressure of the air source connecting pipe 5 at the feeding end and the air source connecting pipe 8 at the discharging end are connected with the same air source pressure, N2 The air sources respectively enter the annular air chambers I6-1 and II in the annular air distribution device 6 at the feeding end and 9 at the discharging end and are respectively sprayed to the upper center and the lower center of the chute barrel 7 in the air column area through respective air spraying holes, so that the chute barrel 7 in the air column area is filled with N2 An isobaric air column is formed at the upper center of the chute tube 7 in the air column area and the lower center of the chute tube 7 in the air column area, and the pressure of the isobaric air column can be adjusted by adjusting the pressure of a main pipe of an external supply air source.
The gas column type active coke regenerated gas sealing device forms an isobaric gas column in the device, is not influenced by the pressure in the regeneration tower, the temperature of active coke materials in the regeneration tower, the moving speed of the active coke materials in the regeneration tower and other process production environment changes under the condition of not influencing the running state of active coke particles, really realizes the purposes of sealing regenerated gas and isolating outside air, is mechanically connected as a whole, has stable performance, is free of maintenance and has long service life.