CN214528874U - Coke oven gas wet desulphurization high tower regeneration system - Google Patents
Coke oven gas wet desulphurization high tower regeneration system Download PDFInfo
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- CN214528874U CN214528874U CN202022935161.3U CN202022935161U CN214528874U CN 214528874 U CN214528874 U CN 214528874U CN 202022935161 U CN202022935161 U CN 202022935161U CN 214528874 U CN214528874 U CN 214528874U
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Abstract
The utility model discloses a coke oven gas wet desulphurization high tower regeneration system, which comprises a desulphurization tower, a reaction tank, a desulphurization liquid circulating pump and a regeneration tower which are connected in sequence; a liquid level regulator is arranged on one side of the regeneration tower and is connected with the desulfurization tower; a main regeneration tail gas pipe is arranged at the top of the regeneration tower, a vacuum breaking pipeline is arranged between the liquid level regulator and the main regeneration tail gas pipe, one end of the vacuum breaking pipeline is connected with the variable-diameter topmost part of the liquid level regulator, and the other end of the vacuum breaking pipeline is connected with the main regeneration tail gas pipe; the utility model discloses can effectively reduce the industry difficult problem that the coal gas oxygen content that coke oven gas wet flue gas desulfurization high tower regeneration technology operation brought rises, solve coke oven gas system methyl alcohol technique because of safety risk and the cost problem that coal gas oxygen content is on the high side brought.
Description
Technical Field
The utility model relates to a coking field, especially a coke oven gas wet flue gas desulfurization high tower regeneration system.
Background
The coke oven gas wet desulphurization high tower regeneration technology is a wet oxidation desulphurization and decyanation technology which adopts a high tower regeneration mode on the engineering design aiming at coke oven gas purification. The method is a very important link in the coal gas purification process because the main environmental protection indexes such as sulfur dioxide are further tightened in recent years and the indexes of hydrogen sulfide of the purified coke oven gas are increasingly strict.
The coke oven gas desulfurization and decyanation method comprises a dry method and a wet method. The dry desulfurization process is intermittent operation, occupies large area, has high labor intensity of replacement and regeneration of the desulfurizer, is generally used only in small scale when supplying civil gas, and adopts a wet desulfurization and decyanation process in modern large-scale coke plants. The wet desulfurization and decyanation process is divided into a wet absorption method and a wet oxidation method. At present, the wet desulfurization and decyanation process has been established and put into production in China as follows:
the wet oxidation method includes a TH method using ammonia as an alkali source, an FRC method using ammonia as an alkali source, an ADA method modified using sodium carbonate as an alkali source, and an HPF method using ammonia as an alkali source.
The wet absorption method includes sorbant (monoethanolamine), ammonia-sulfur cycle washing (AS), potassium carbonate under vacuum, and ammonia-water desulfurization (FAS) using ammonia AS an alkali source and pressure deacidification.
However, in the prior art, the technical problems that a rich liquid pump and a barren liquid pump are respectively used in the operation process, the desulfurization solution needs to be pressurized twice, the energy consumption is high under the same treatment capacity, and the operation power consumption cost is high exist in the coke oven gas wet desulphurization blast tower; secondly, the ejector adopts a Venturi effect, so that the air consumption and the regeneration effect are greatly influenced by the jet flow, and the adjustment difficulty is high; the regeneration time of the desulfurization solution in the regeneration tank is longer than that of the tower, the regeneration retention time is short, and the spray regeneration effect is higher than that of the tower, and the regeneration effect is poor; thirdly, a siphon effect is generated at the top of the pipeline, and a larger negative pressure area is generated in the liquid level regulator, so that on one hand, the U-shaped desulfurization liquid pipeline can generate violent vibration to influence the safe operation of the equipment; on the other hand, the liquid level of sulfur foam at the top of the regeneration tower is reduced under the action of negative pressure, so that part of sulfur foam and air enter a negative pressure area and further enter a gas system of a desulfurizing tower under the entrainment of desulfurizing liquid, the oxygen content of the gas behind the desulfurizing tower is increased, and the condition of blockage of a filler of the desulfurizing tower due to long-time operation is caused; fourthly, in order to avoid pipeline vibration under the condition that the liquid level regulator is sealed, a flange at the top of the liquid level regulator is opened completely or partially, and air enters the liquid level regulator to counteract the influence of negative pressure, the method can eliminate the pipeline vibration, but the amount of air carried by the desulfurization solution is increased, the oxygen content of the desulfurized coal gas is increased by about 0.1-0.2 percent compared with that of the desulfurized coal gas, and the oxygen content of the desulfurized coal gas is increased to 0.4-0.5 percent. The oxygen content is increased to cause great influence on a subsequent methanol workshop fine desulfurization device, so that the catalyst consumption speed is increased, the temperature of fine desulfurization equipment is rapidly increased, and a temperature runaway accident is caused.
The problems become a common problem of a coke oven gas desulfurization and decyanation high tower regeneration process in the coking industry, and for the problem, a coke oven gas wet desulfurization high tower regeneration system which is stable in operation, good in environmental protection effect, capable of solving the problem of increasing the oxygen content of the gas, avoiding blockage of a desulfurization tower, reducing vibration of a pipeline and reducing discharge of regeneration tail gas is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coke oven gas wet flue gas desulfurization high tower regeneration system, it has the operation stably, environmental protection is effectual, can solve the rising of coal gas oxygen content, avoids the desulfurizing tower to block up, reduces the pipeline vibrations and reduces the outer row of regeneration tail gas.
In order to achieve the above object, the utility model provides a following technical scheme: a coke oven gas wet desulphurization high tower regeneration system comprises a desulphurization tower, a reaction tank, a desulphurization liquid circulating pump and a regeneration tower which are connected in sequence; a liquid level regulator is arranged on one side of the regeneration tower and is connected with the desulfurization tower; the top of regeneration tower is provided with regeneration tail gas and is responsible for, the liquid level controller with be provided with broken vacuum pipe between the regeneration tail gas is responsible for, broken vacuum pipe's one end with the reducing topmost of liquid level controller is connected, broken vacuum pipe's the other end with regeneration tail gas is responsible for and is connected. This coke oven gas wet flue gas desulfurization high tower regeneration system is through broken vacuum pipeline, with the vacuum region of the leading-in liquid level control ware of the regeneration tail gas that oxygen content is low, when eliminating the vacuum influence, collect the tail gas that the processing part contains the VOCs component, reduce regeneration tail gas treatment pressure, simultaneously after the broken vacuum pipeline of installation, all open liquid level control ware's top flange, can avoid the device to put into operation initial stage pipeline and produce the vibration, guarantee device safety and stability operation.
As a further improvement of the technical scheme, the vacuum pipeline is provided with an adjusting valve, and the adjusting valve is convenient for adjusting the tail gas suction amount when the oxygen content of the regeneration tail gas rises, so that the probability of the oxygen content rise of the coal gas is reduced.
As a further improvement of the technical scheme, when the liquid level regulator is connected with the desulfurizing tower, the liquid level regulator is connected with the desulfurizing tower through a U-shaped water seal pipe, and a desulfurizing liquid regulating valve is arranged on the U-shaped water seal pipe.
As a further improvement of the technical scheme, the desulfurizing tower is also provided with a coke oven gas inlet and a coke oven gas outlet.
As a further improvement of the above technical solution, an air inlet is provided at a lower portion of the regeneration tower, and the air inlet is capable of introducing compressed air.
As a further improvement of the technical scheme, the diameter of the vacuum-breaking pipeline is larger than phi 325, the vacuum-breaking pipeline is made of stainless steel, the vacuum-breaking pipeline is resistant to sulfide corrosion, the pipeline corrosion is avoided, the investment cost is reduced, and the service life of the coke oven gas wet desulphurization high tower regeneration system can be prolonged.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model can effectively reduce the industrial problem of the increase of the oxygen content of the coal gas caused by the operation of the high tower regeneration process of the coke oven gas wet desulphurization, and solve the problems of safety risk and cost caused by the higher oxygen content of the coal gas in the technology of preparing methanol from the coke oven gas;
the utility model thoroughly solves the problem of pipeline vibration caused by the sealing of the liquid level regulator by breaking the vacuum area of the liquid level regulator, prolongs the service life of the equipment and ensures the stable operation of the equipment;
the utility model thoroughly solves the problem that the desulfurization liquid carries sulfur foam due to the increase of the vacuum degree by breaking the vacuum area of the liquid level regulator, relieves the problem of the packing blockage of the desulfurization tower, and prolongs the equipment maintenance and cleaning period;
the utility model has the characteristics of simple structure, the working costs is low, and the operation is stable, and the environmental protection is effectual, invests cheap relatively.
Drawings
FIG. 1 is a schematic structural diagram of a coke oven gas wet desulphurization high tower regeneration system.
Reference numerals: 1 is a desulfurizing tower, 2 is a reaction tank, 3 is a desulfurizing liquid circulating pump, 4 is a regenerating tower, 5 is a liquid level regulator, 6 is a main regenerating tail gas pipe, 7 is a vacuum breaking pipe, 8 is a regulating valve, 9 is a desulfurizing liquid regulating valve, 10 is a coke oven gas inlet, 11 is a coke oven gas outlet, 12 is an air inlet, and 13 is a foam outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a coke oven gas wet desulphurization high tower regeneration system comprises a desulphurization tower 1, a reaction tank 2, a desulphurization solution circulating pump 3 and a regeneration tower 4 which are connected in sequence; a liquid level regulator 5 is arranged on one side of the regeneration tower 4, and the liquid level regulator 5 is connected with the desulfurization tower 1; the top of regenerator column 4 is provided with regeneration tail gas and is responsible for 6, liquid level regulator 5 with regeneration tail gas is responsible for and is provided with broken vacuum pipe 7 between 6, broken vacuum pipe 7 one end with liquid level regulator 5's reducing top is connected to reach the best broken vacuum effect, broken vacuum pipe 7 the other end with regeneration tail gas is responsible for 6 and is connected for carry the tail gas that the oxygen content is low to the vacuum region, abolishes the vacuum. This coke oven gas wet flue gas desulfurization high tower regeneration system is through broken vacuum pipeline 7, with the vacuum region of the leading-in liquid level control ware of the regeneration tail gas that the oxygen content is low, when eliminating the vacuum influence, collect the tail gas that the processing part contains the VOCs component, reduce regeneration tail gas treatment pressure, simultaneously after the broken vacuum pipeline 7 of installation, all open liquid level control ware 5's top flange, can avoid the device to put into operation initial stage pipeline and produce the vibration, guarantee device safety and stability operation.
The vacuum pipeline 7 is provided with an adjusting valve 8, and the adjusting valve 8 is convenient for adjusting the tail gas suction amount when the oxygen content of the regeneration tail gas rises, so that the probability of the rising of the oxygen content of the coal gas is reduced.
When the liquid level regulator 5 is connected with the desulfurizing tower 1, the liquid level regulator adopts a U-shaped water seal pipe for connection, and a desulfurizing liquid regulating valve 9 is arranged on the U-shaped water seal pipe.
The desulfurizing tower 1 is also provided with a coke oven gas inlet 10 and a coke oven gas outlet 11; the coke oven gas inlet 10 is used for allowing the coke oven gas cooled by the precooling tower to enter the desulfurizing tower 1 from the bottom of the tower, and the coke oven gas outlet 11 is used for discharging the coke oven gas passing through the coke oven gas wet desulphurization high tower regeneration system.
The lower part of the regeneration tower 4 is provided with an air inlet 12, the air inlet 12 can be filled with compressed air to enable the desulfurization rich solution to be oxidized and regenerated in the tower, the diameter of the upper part of the regeneration tower 4 is larger than that of the bottom of the regeneration tower and forms an annular chamber, and the exterior of the annular chamber is connected with a foam discharge port 13.
In the above embodiment, the diameter of the vacuum-breaking pipe 7 is greater than phi 325, the vacuum-breaking pipe 7 is made of stainless steel, the stainless steel has good corrosion resistance, and the stainless steel can still maintain excellent physical and mechanical properties at high temperature, and the preferred stainless steel is made of S304, which has sulfide corrosion resistance, so as to avoid corrosion of the pipe, reduce investment cost, and further improve the service life of the coke oven gas wet desulphurization high tower regeneration system.
When the coke oven gas wet desulphurization high tower regeneration system is used specifically, the coke oven gas cooled by the precooling tower enters the desulphurization tower 1 from the bottom of the tower, and is in countercurrent contact with the desulphurization barren solution sprayed from the top of the tower in the desulphurization tower 1 to absorb hydrogen sulfide and hydrogen cyanide in the gas, and the desulfurized gas is sent to the subsequent procedures for treatment. The desulfurized rich solution flows into a reaction tank 2 from the bottom of a desulfurizing tower 1, and is pumped and sent to a regeneration tower 4 by a desulfurizing solution circulating pump 3. Meanwhile, compressed air is introduced from the bottom of the regeneration tower 4, so that the desulfurization rich solution can be oxidized and regenerated in the tower. The regenerated barren solution automatically flows back to the desulfurizing tower for recycling through the liquid level regulator 5 and the U-shaped water seal pipe from the top of the regeneration tower 4 by utilizing the potential difference. Sulfur foam suspended on the top of the regeneration tower 4 overflows into an expanded part (annular chamber) on the top of the regeneration tower, automatically flows into a foam discharge port 13 by utilizing a potential difference and is subjected to subsequent treatment, a vacuum pipeline 7 is broken, regeneration tail gas with low oxygen content is guided into a vacuum area of a liquid level regulator 5, the tail gas containing VOCs components in the treated part is collected while the vacuum influence is eliminated, and the residual tail gas is discharged from the top of the regeneration tower 4, so that the VOCs pollution is avoided, and the collected tail gas is subjected to centralized incineration treatment.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A high tower regeneration system for wet desulphurization of coke oven gas is characterized by comprising a desulphurization tower (1), a reaction tank (2), a desulphurization liquid circulating pump (3) and a regeneration tower (4) which are connected in sequence; a liquid level regulator (5) is arranged on one side of the regeneration tower (4), and the liquid level regulator (5) is connected with the desulfurization tower (1); the top of regeneration tower (4) is provided with regeneration tail gas and is responsible for (6), liquid level controller (5) with be provided with broken vacuum pipe (7) between regeneration tail gas is responsible for (6), the one end of broken vacuum pipe (7) with the reducing of liquid level controller (5) is connected at the top, the other end of broken vacuum pipe (7) with regeneration tail gas is responsible for (6) and is connected.
2. The coke oven gas wet desulphurization high tower regeneration system according to claim 1, wherein the vacuum pipeline (7) is provided with a regulating valve (8).
3. The coke oven gas wet desulphurization high tower regeneration system according to claim 1, wherein the liquid level regulator (5) is connected with the desulphurization tower (1) by a U-shaped water seal pipe.
4. The coke oven gas wet desulphurization high tower regeneration system according to claim 3, wherein the U-shaped water seal pipe is provided with a desulphurization solution regulating valve (9).
5. The coke oven gas wet desulphurization high tower regeneration system according to claim 1, wherein the desulphurization tower (1) is further provided with a coke oven gas inlet (10) and a coke oven gas outlet (11).
6. The coke oven gas wet desulphurization high tower regeneration system according to claim 1, wherein the lower part of the regeneration tower (4) is provided with an air inlet (12).
7. Coke oven gas wet desulphurization high tower regeneration system according to claim 6, characterized in that the upper part of the regeneration tower (4) has a larger diameter than the bottom part and forms an annular chamber.
8. The coke oven gas wet desulphurization high tower regeneration system according to claim 7, wherein a foam discharge port (13) is connected to the outside of the annular chamber.
9. The coke oven gas wet desulphurization high tower regeneration system according to claim 1, wherein the diameter of the vacuum-breaking pipe (7) is greater than phi 325.
10. The coke oven gas wet desulphurization high tower regeneration system of claim 1, wherein the vacuum-breaking pipe (7) is made of stainless steel.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114262632A (en) * | 2021-12-23 | 2022-04-01 | 中冶焦耐(大连)工程技术有限公司 | Liquid level regulator arranged in regeneration tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114262632A (en) * | 2021-12-23 | 2022-04-01 | 中冶焦耐(大连)工程技术有限公司 | Liquid level regulator arranged in regeneration tower |
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