CN217526983U

CN217526983U - Dry quenching double-circuit flue gas desulfurization device

Info

Publication number: CN217526983U
Application number: CN202220932558.3U
Authority: CN
Inventors: 李梦年; 马征; 周晓晨; 梁刚; 张雷雷
Original assignee: Linhuan Coking and Chemical Co Ltd
Current assignee: Linhuan Coking and Chemical Co Ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-10-04
Anticipated expiration: 2032-04-21

Abstract

The utility model provides a dry quenching double-circuit flue gas desulfurization device relates to the desulphurization unit field, including the dry quenching stove diffuse flue gas pipeline, jiao Liucao diffuse flue gas pipeline, dust catcher, steam heater, desulfurizing tower, the post-desulphurization dust catcher, desulfurization draught fan and dust removal chimney, all through the pipeline intercommunication between dry quenching stove diffuse flue gas pipeline, jiao Liucao diffuse flue gas pipeline, dust catcher, desulfurization draught fan and the dust removal chimney in advance, one side of desulfurizing tower is equipped with SDS flue reactor, the both ends of SDS flue reactor all are equipped with auxiliary connection pipe; the utility model discloses a two spray guns that drench spray water to the desulfurizing tower is inside, with the temperature control in the desulfurizing tower under best reaction temperature, reach best gas-solid turbulent flow and mix, rivers constantly expose the new surface of unreacted lime hydrate simultaneously to the desulfurization effect of flue gas has been guaranteed.

Description

Dry quenching double-circuit flue gas desulfurization device

Technical Field

The utility model relates to a desulphurization unit technical field especially relates to a dry coke quenching double-circuit flue gas desulphurization unit.

Background

The flue gas of a gas emission port and a coke discharge chute behind a circulating fan of a dry quenching facility has high sulfur dioxide content, a desulphurization device is not arranged, the concentration of SO2 at the discharge port can reach 1800mg/Nm <3 >, and the requirement of special discharge limit standard of coking chemical industry pollutant discharge standard (GB 16171-2012) can not be met. The total discharge port SO2 discharge must be controlled to be less than or equal to 30mg/Nm3, and the dust discharge must be controlled to be less than or equal to 10mg/Nm 3.

Make dry coke quenching diffuse flue gas and reach ultra-clean emission standard through installing desulfurization dust collector additional, to improving the atmospheric environment quality in local area, promote the coordinated development of economy and environment, it has positive effect to realize sustainable development, increases environmental benefit and social simultaneously, how then further assurance desulphurization unit's desulfurization effect and the steady operation of guaranteeing desulphurization unit be the problem that we need solve at present, consequently the utility model provides a dry coke quenching double-circuit flue gas desulphurization unit is in order to solve the problem that exists among the prior art.

Disclosure of Invention

To the problem, the utility model provides a dry coke quenching double-circuit flue gas desulphurization unit, this dry coke quenching double-circuit flue gas desulphurization unit can detect the content of waiting exhaust flue gas dust and SO2 through detecting the commutator, if unqualified, will open the recycle damper door on the back flow, send into the flue gas desulfurization in the desulfurizing tower once more, realized the ultralow emission of dry coke quenching diffusing flue gas and this two way flue gas of burnt flue gas of row through the manifold cycles desulfurization to the flue gas.

For realizing the purpose of the utility model, the utility model discloses a following technical scheme realizes: the utility model provides a dry coke quenching double-circuit flue gas desulfurization device, diffuses flue gas pipeline, jiao Liucao including dry quenching stove diffuses flue gas pipeline, pre-deduster, steam heater, desulfurizing tower, desulfurization after dust remover, desulfurization draught fan and dust removal chimney, dry quenching stove diffuses flue gas pipeline, jiao Liucao diffuses flue gas pipeline, pre-deduster, steam heater, desulfurizing tower, all through the pipeline intercommunication between desulfurization after dust remover, desulfurization draught fan and the dust removal chimney, one side of desulfurizing tower is equipped with SDS flue reactor, the both ends of SDS flue reactor all are equipped with auxiliary connection pipe, and are two sets of the one end of auxiliary connection pipe respectively with pipeline between steam heater and the desulfurizing tower and the pipeline intercommunication between desulfurizing tower and the desulfurization after dust remover, be equipped with the detection commutator between desulfurization draught fan and the dust removal chimney, be equipped with on the detection commutator, the one end of back flow and the pipeline intercommunication between steam heater and the desulfurizing tower, the connected node of pipeline between back flow and steam heater and the desulfurizing tower is located before the connected node of auxiliary connection pipe.

The further improvement lies in that: be equipped with the first connecting pipe that directly communicates with the dust removal chimney on the flue gas pipeline that diffuses of dry quenching stove, be equipped with the flue gas bypass damper that diffuses on the first connecting pipe, be equipped with the flue gas damper that diffuses on the pipeline between flue gas pipeline that diffuses of dry quenching stove and the dust precipitator in advance, jiao Liucao diffuses and is equipped with the second connecting pipe that directly communicates with the dust removal chimney on the flue gas pipeline, be equipped with coke discharging chute bypass flue gas damper on the second connecting pipe, jiao Liucao diffuses and is equipped with coke discharging chute flue gas damper on the pipeline between flue gas pipeline and the dust precipitator in advance.

The further improvement lies in that: and an auxiliary connecting pipe below the SDS flue reactor is provided with an SDS inlet baffle door, the input end of the desulfurizing tower is provided with a CFB inlet baffle door, the return pipe is provided with a recirculation baffle door, and the steam heater is provided with a control valve.

The further improvement lies in that: the dust collector is characterized in that a spiral conveyor is arranged below the pre-dust collector, and the output end of the spiral conveyor is communicated with the dry powder collecting bin.

The further improvement lies in that: one side of desulfurizing tower is equipped with the raceway, the inside of desulfurizing tower is equipped with two spray gun that drench, the raceway with two spray gun intercommunication that drench.

The beneficial effects of the utility model are that: the utility model discloses a two spray guns that drench are to the inside water spray of desulfurizing tower, with the temperature control in the desulfurizing tower under the best reaction temperature, reach the mixing of best gas-solid turbulent flow, rivers constantly expose the new surface of unreacted lime hydrate simultaneously, thereby the desulfurization effect of flue gas has been guaranteed, can detect the content of treating exhaust flue gas dust and SO2 through detecting the commutator simultaneously, if unqualified, the recirculation damper on the back flow will be opened, send the flue gas into the desulfurizing tower internal desulfurization once more, through the multicycle desulfurization to the flue gas, the ultralow emission of this two way flue gas of dry coke quenching diffusing flue gas and row burnt flue gas has been realized, SO2 discharge concentration <30mg/Nm3, smoke concentration <100mg/Nm3, simultaneously, through the setting of SDS flue reactor, when the desulfurizing tower can't carry out desulfurization or desulfurization inefficiency, open SDS entry damper, switch to SDS flue reactor work, and then guarantee up to standard of environmental protection data, the desulfurization of this device is high-efficient, stable operation.

Drawings

Fig. 1 is a schematic diagram of the operation of the present invention.

Fig. 2 is a flow chart of the present invention.

Wherein: 1. a flue gas pipeline is diffused by the dry quenching furnace; 2. jiao Liucao fume emission pipeline; 3. a pre-deduster; 4. a steam heater; 5. a desulfurizing tower; 6. a post-desulfurization dust remover; 7. a desulfurization draught fan; 8. a dust removal chimney; 9. an SDS flue reactor; 10. an auxiliary connection pipe; 11. detecting a commutator; 12. a return pipe; 13. a first connecting pipe; 14. a diffusing flue gas bypass damper; 15. a smoke diffusing baffle door; 16. a second connection pipe; 17. a coke discharging chute bypass flue gas baffle door; 18. a coke discharging chute flue gas baffle door; 19. an SDS inlet flapper door; 20. a CFB inlet flapper door; 21. a recirculation flapper door; 22. a control valve; 23. a screw conveyor; 24. a water delivery pipe; 25. double-shower spray gun.

Detailed Description

In order to deepen the understanding of the present invention, the following embodiments are combined to further detail the present invention, and the present embodiment is only used to explain the present invention, and does not constitute the limitation of the protection scope of the present invention.

According to the drawings of fig. 1 and 2, the embodiment provides a dry quenching dual-path flue gas desulfurization device, which comprises a dry quenching furnace fume emission pipeline 1, a Jiao Liucao fume emission pipeline 2, a pre-dust remover 3, a steam heater 4, a desulfurization tower 5, a post-desulfurization dust remover 6, a desulfurization induced draft fan 7 and a dust removal chimney 8, wherein the dry quenching furnace fume emission pipeline 1, a Jiao Liucao fume emission pipeline 2, the pre-dust remover 3, the steam heater 4, the desulfurization tower 5, the post-desulfurization dust remover 6, the desulfurization induced draft fan 7 and the dust removal chimney 8 are communicated through pipelines, one side of the desulfurization tower 5 is provided with an SDS flue reactor 9, two ends of the SDS flue reactor 9 are provided with auxiliary connecting pipes 10, one ends of the two groups of auxiliary connecting pipes 10 are respectively communicated with the pipelines between the steam heater 4 and the desulfurization tower 5 and the pipelines between the desulfurization tower 5 and the post-desulfurization dust remover 6, a detection commutator 11 is arranged between the desulfurization induced draft fan 7 and the dust removal chimney 8, a return pipe 12 is arranged on the detection commutator 11, one end of the return pipe 12 is communicated with a pipeline between the steam heater 4 and the desulfurization tower 5, a connection node of the return pipe 12 and the pipeline between the steam heater 4 and the desulfurization tower 5 is positioned in front of a connection node of the auxiliary connection pipe 10, flue gas in the flue gas pipeline 1 and the flue gas pipeline 3763 in the flue gas pipeline 2 is diffused by the dry quenching furnace and mixed in the pre-dust remover 3, the flue gas after primary removal of large granular coke powder enters the steam heater 4, the flue gas is heated to the CFB reaction temperature of 150 to 180 ℃ and then enters the desulfurization tower 5 for desulfurization, the desulfurized flue gas enters the post-desulfurization dust remover 6 for further dust removal, a settling chamber is additionally arranged in the post-desulfurization dust remover 6 to realize the pre-separation effect, and in the settling section, the flue gas collides with the guide plate, coarse particle dust falls into the dust hopper, the filter bag provided with the metal frame is arranged in the dust hopper, the upper end of the filter bag is provided with a reinforced flange and a steel hoop, the lower end of the cloth bag is designed with a reinforced flange and a double-layer bottom surface, the dust hopper of the deduster 6 after desulfurization is provided with a steam heating heat retainer which is only used when the deduster is started or temporarily stopped under the cold condition to ensure that acid dewing is not generated on the inner wall of the deduster 6 body after desulfurization, a heater is closed under the normal operation condition of dry quenching, the ash part in the dust hopper at the bottom of the deduster 6 after desulfurization is discharged through a flow control valve, the deduster 6 body after desulfurization is provided with a bypass flue, when the temperature or the differential pressure exceeds a set value, the bypass automatically operates to ensure the safe and stable operation of the system, the resistance of the deduster 6 after desulfurization is less than or equal to 1500Pa, the maximum resistance is less than or equal to 1800Pa, the flue gas enters the detection commutator 11 through the desulfurization induced draft fan 7 after being dedusted by the deduster 6 after desulfurization to be subjected to content detection, the flue gas reaching the standard is discharged into the atmosphere after passing through the dedusting chimney 8, the flue gas not reaching the standard is sent into the desulfurizing tower 5 again through the return pipe 12 to be desulfurized, and the ultralow emission of two paths of flue gas, namely dry quenching diffusing flue gas and coke discharging flue gas, is realized through the repeated circulating desulfurization of the flue gas, the SO2 emission concentration is less than 30mg/Nm3, and the smoke concentration is less than 100mg/Nm3.

The dry quenching furnace smoke emission pipeline 1 is provided with a first connecting pipe 13 directly communicated with a dust removal chimney 8, the first connecting pipe 13 is provided with a smoke emission bypass damper 14, a pipeline between the dry quenching furnace smoke emission pipeline 1 and a pre-dust remover 3 is provided with a smoke emission damper 15, the Jiao Liucao smoke emission pipeline 2 is provided with a second connecting pipe 16 directly communicated with the dust removal chimney 8, the second connecting pipe 16 is provided with a coke discharge chute bypass damper 17, the Jiao Liucao smoke emission pipeline 2 and the pre-dust remover 3 is provided with a coke discharge chute smoke emission damper 18, smoke in the dry quenching furnace smoke emission pipeline 1 directly opens the smoke emission bypass damper 14 after being detected to reach the standard, the smoke emission damper 15 is closed, the smoke is directly discharged from the dust removal chimney 8, the coke discharge damper 15 is opened if the smoke is not reached to the standard, the smoke emission bypass damper 14 is closed, the smoke is sent into the pre-dust remover 3, the coke discharge flue in the coke discharge pipeline 2 is directly opened from the dust removal chimney 8 after being detected to the standard, and the coke discharge damper 18 is directly closed if the coke discharge chute does not reach the standard, otherwise, the coke discharge damper 18 is directly discharged from the coke discharge chute.

An SDS inlet damper 19 is arranged on an auxiliary connecting pipe 10 below the SDS flue reactor 9, a CFB inlet damper 20 is arranged at the input end of the desulfurizing tower 5, a recirculation damper 21 is arranged on the return pipe 12, a control valve 22 is arranged on the steam heater 4, the SDS flue reactor 9 can be closed through the arrangement of the SDS inlet damper 19, when the desulfurizing tower 5 is in abnormal operation or the desulfurizing efficiency is low, the CFB inlet damper 20 controls whether the desulfurizing tower 5 works, the flue gas can be directly switched and sent to the SDS flue reactor 9, baking soda ground to the particle size of 20 to 30 micrometers is sprayed into the SDS flue reactor 9 through a fan to desulfurize the flue gas, the high-efficiency and stable operation of a coke dry quenching system are ensured, the recirculation damper 21 controls the opening and closing of the return pipe 12, and the control valve 22 controls the operation of the steam heater 4.

The below of dust precipitator 3 is equipped with screw conveyer 23 in advance, screw conveyer 23's output and dry powder collection storehouse intercommunication, dust precipitator 3 adopts four ash buckets in two rooms to arrange in advance, and the ash bucket lower part is equipped with screw conveyer 23, and screw conveyer 23 will remove the fine coke granule and arrange to dry powder collection storehouse, will remove the fine coke granule by the factory tank car and retrieve.

One side of desulfurizing tower 5 is equipped with raceway 24, the inside of desulfurizing tower 5 is equipped with two spray gun 25 that drenches, raceway 24 and two spray gun 25 intercommunication that drench, the flue gas gets into from desulfurizing tower 5 lower part, sets up two spray gun 25 and spout into desulfurizing tower 5 after atomizing industrial water, and the flue gas reacts with the desulfurization material and produces reaction product such as CaSO4 and CaSO3, caCl2, and these dry product subtotal are discharged from the ash discharge mouth at the bottom of desulfurizing tower 5 tower.

The flue gas in the flue gas diffusing pipeline 1 and Jiao Liucao of the dry quenching double-path flue gas desulfurization device is mixed in the pre-dust remover 3, the flue gas after primary removal of large granular coke powder enters the steam heater 4, the flue gas is heated to the CFB reaction temperature of 150-180 ℃ and then enters the desulfurization tower 5 for desulfurization, the desulfurized flue gas enters the post-desulfurization dust remover 6 for further dust removal, the flue gas enters the detection commutator 11 for content detection through the desulfurization induced draft fan 7 after being subjected to dust removal by the post-desulfurization dust remover 6, the up-to-standard flue gas is discharged into the atmosphere after passing through the dust removal chimney 8, the down-to-standard flue gas is sent into the desulfurization tower 5 again through the return pipe 12 for desulfurization, the desulfurization effect of the device is ensured, when the desulfurization tower 5 runs abnormally or the desulfurization efficiency is low, the CFB inlet damper 20 controls whether the desulfurization tower 5 works, the flue gas can be directly switched to be sent to the SDS flue reactor 9 for desulfurization, and the efficient and stable operation of a dry quenching system is ensured.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a dry coke quenching double-circuit flue gas desulphurization unit, diffuses flue gas pipeline (2), dust remover (3), steam heater (4), desulfurizing tower (5), desulfurization back dust remover (6), desulfurization draught fan (7) and dust removal chimney (8), its characterized in that including dry coke quenching stove diffuse flue gas pipeline (1), jiao Liucao: put out the stove futilely and diffuse flue gas pipeline (1), jiao Liucao and diffuse flue gas pipeline (2), dust remover (3), steam heater (4), desulfurizing tower (5), desulfurization back dust remover (6), desulfurization draught fan (7) and dust removal chimney (8) between all through the pipeline intercommunication, one side of desulfurizing tower (5) is equipped with SDS flue reactor (9), the both ends of SDS flue reactor (9) all are equipped with auxiliary connection pipe (10), two sets of the one end of auxiliary connection pipe (10) respectively with steam heater (4) and desulfurizing tower (5) between pipeline and desulfurizing tower (5) and the desulfurization back dust remover (6) between the pipeline intercommunication, be equipped with between desulfurization draught fan (7) and dust removal chimney (8) and detect commutator (11), it is equipped with back flow (12) on commutator (11), the one end of back flow (12) and the pipeline intercommunication between steam heater (4) and desulfurizing tower (5), back flow (12) and steam heater (4) and the steam heater (5) between the connecting node (10) of connecting pipe are located before the auxiliary connection node.

2. The dry quenching double-path flue gas desulfurization device as claimed in claim 1, characterized in that: be equipped with on dry out stove diffuse flue gas pipeline (1) first connecting pipe (13) with dust removal chimney (8) direct intercommunication, be equipped with on first connecting pipe (13) and diffuse flue gas bypass damper (14), be equipped with on the dry out stove diffuse flue gas pipeline (1) and be equipped with diffuse flue gas damper (15) on the pipeline between dust remover (3), jiao Liucao is equipped with second connecting pipe (16) with dust removal chimney (8) direct intercommunication on diffusing flue gas pipeline (2), be equipped with coke discharging chute bypass damper (17) on second connecting pipe (16), be equipped with coke discharging chute damper (18) on the pipeline between Jiao Liucao diffuse flue gas pipeline (2) and dust remover (3).

3. The dry quenching double-path flue gas desulfurization device as claimed in claim 1, characterized in that: an SDS inlet baffle door (19) is arranged on the auxiliary connecting pipe (10) below the SDS flue reactor (9), a CFB inlet baffle door (20) is arranged at the input end of the desulfurizing tower (5), a recirculation baffle door (21) is arranged on the return pipe (12), and a control valve (22) is arranged on the steam heater (4).

4. The dry quenching double-path flue gas desulfurization device as claimed in claim 1, characterized in that: the dust collector is characterized in that a spiral conveyor (23) is arranged below the pre-dust collector (3), and the output end of the spiral conveyor (23) is communicated with the dry powder collecting bin.

5. The dry quenching double-path flue gas desulfurization device as claimed in claim 3, characterized in that: one side of the desulfurizing tower (5) is provided with a water delivery pipe (24), the inside of the desulfurizing tower (5) is provided with two spray guns (25), and the water delivery pipe (24) is communicated with the two spray guns (25).