CN112933946A - Deacidification treatment device for incineration tail gas - Google Patents

Deacidification treatment device for incineration tail gas Download PDF

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Publication number
CN112933946A
CN112933946A CN202110195400.2A CN202110195400A CN112933946A CN 112933946 A CN112933946 A CN 112933946A CN 202110195400 A CN202110195400 A CN 202110195400A CN 112933946 A CN112933946 A CN 112933946A
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accident
control valve
circulating pump
pipeline
alkali liquor
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邢国栋
陈洪超
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/79Injecting reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/346Controlling the process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

The utility model provides an incineration tail gas deacidification processing apparatus, relates to exhaust-gas treatment technical field, and it includes high-efficient absorber, deacidification tower, accident groove, alkali lye preparation groove, contrary circulating pump group that spouts, reserve circulating pump group, alkali lye circulating pump group. The upper end of high-efficient absorber be equipped with into the mouth of cigarette, it is equipped with overflow arrangement to advance mouth of cigarette department, the inside of high-efficient absorber is equipped with high-efficient shower nozzle and accident nozzle, deacidification tower inside from down up being equipped with flue gas entry, filler defogging device, reserve spray set, baffling board defogging device, exhanst gas outlet in proper order. The accident tank is respectively communicated with the accident spray head, the overflow device and the process water through a control valve and a pipeline, and the alkali liquor preparation tank is communicated with the desulfurizing tower through an alkali liquor circulating pump group, a control valve and a pipeline. The invention has simple and compact structure, simple and convenient operation, low operation cost and long service life, and can avoid the damage of subsequent equipment caused by overhigh temperature of the discharged flue gas when accidents such as power failure, equipment failure and the like occur.

Description

Deacidification treatment device for incineration tail gas
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a deacidification treatment device for incineration tail gas.
Background
Acid tail gas generated in the cracking and burning process of hazardous wastes in China is one of main pollutants in the atmospheric environment. The main component of the acid gas is sulfur dioxide, which is one of the important indicators for determining whether the atmosphere is polluted. After entering the respiratory tract, sulfur dioxide is mostly blocked in the upper respiratory tract due to its high solubility in water, and forms corrosive sulfurous acid, sulfuric acid and sulfate on the wet mucosa, thus enhancing its irritant effect. Meanwhile, sulfur dioxide entering the blood can reach the lung through blood circulation to generate stimulation. Sulfur dioxide can be absorbed into blood, and toxic and side effects are generated to the whole body.
Meanwhile, sulfur dioxide is an important source of acid rain, and the acid rain brings serious influence and damage to the earth ecological environment and the human society and economy. Research shows that acid rain brings serious harm to soil, water, forest, building, scenic spots, historic sites and other human landscapes, not only causes great economic loss, but also endangers human survival and development.
The temperature of the flue gas after incineration at present is reduced to 180-200 ℃ after passing through a waste heat boiler, a quenching and neutralizing tower, a dry-type reaction device and a pulse bag-type dust remover. For the treatment of the flue gas, the structure of the existing equipment is complex, the occupied area is large, the operating cost is high, the spray head is easy to block in the operating process to influence the treatment effect, the service life at the temperature is short, and the failure rate is high. When accidents such as power failure or equipment failure occur, the conventional equipment cannot avoid the damage of subsequent equipment caused by overhigh temperature of the discharged flue gas.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the deacidification treatment device for the incineration tail gas, which has the advantages of simple and compact structure, simplicity and convenience in operation, low operation cost and long service life, and can avoid the damage of subsequent equipment caused by overhigh temperature of the discharged flue gas when accidents such as power failure or equipment failure occur.
In order to solve the problems, the invention adopts the following technical scheme: a deacidification treatment device for incineration tail gas is characterized by comprising a high-efficiency absorber, a deacidification tower, an accident tank, an alkali liquor preparation tank, a reverse-spraying circulating pump unit, a standby circulating pump unit and an alkali liquor circulating pump unit,
the upper end of the high-efficiency absorber is provided with a smoke inlet, the smoke inlet is provided with an overflow device, the high-efficiency absorber is internally provided with a high-efficiency spray head and an accident spray head, the lower end of the high-efficiency absorber is communicated with a smoke inlet of the deacidification tower,
the deacidification tower is internally provided with a flue gas inlet, a filler demisting device, a standby spraying device, a baffle plate demisting device and a flue gas outlet from bottom to top in sequence, alkali liquor is contained at the bottom of the desulfurization tower, the bottom of the desulfurization tower is respectively communicated with a reverse spray circulation pump set, a standby circulation pump set and an alkali liquor circulation pump set through a pipeline and a control valve, a remote transmission liquid level meter and a PH meter are arranged inside the desulfurization tower, the flue gas outlet is communicated with a chimney through a flue, and a thermocouple is arranged on the flue at the flue gas outlet,
the accident tank is respectively communicated with the accident nozzle, the overflow device and the process water through a control valve and a pipeline,
the alkali liquor preparation tank is communicated with the desulfurizing tower through an alkali liquor circulating pump unit, a control valve and a pipeline, a water inlet of the alkali liquor circulating pump unit is communicated with process water through the control valve and the pipeline,
the reverse-spraying circulating pump group is respectively communicated with the desulfurizing tower, the waste liquid discharge outlet, the high-efficiency spray head and the accident slot through pipelines and control valves,
the water outlet of the standby circulating pump group is communicated with the standby spraying device through a pipeline,
the monitoring signal of the PH meter is sent to a control valve of a pipeline between the alkali liquor preparation tank and the desulfurizing tower in real time, and the control valve is automatically opened or closed according to the signal value,
the monitoring signal with a remote transmission liquid level meter in the desulfurizing tower is sent to a control valve of a pipeline between the reverse-spraying circulating pump set and the waste liquid discharge outlet in real time, and the control valve is automatically opened or closed according to the signal value,
the monitoring signal of the thermocouple is sent to a control valve of a pipeline between the accident slot and the accident nozzle in real time, and the control valve is automatically opened or closed according to the signal value,
further: the spraying directions of the high-efficiency spray head and the accident spray head are vertical upwards.
Further: and a liquid level meter is arranged in the accident tank.
Further: a stirrer is arranged in the alkali liquor preparation tank.
The invention has the beneficial effects that:
1. the device simple structure is compact, and is easy and simple to handle, and the running cost is low, and long service life when taking place accidents such as power failure or equipment trouble, can avoid causing the damage of follow-up equipment because of exhaust flue gas high temperature.
2. The overflow device is arranged at the smoke inlet, the liquid in the accident groove flows out after passing through the overflow device, and an annular water curtain is formed along the inner tube wall of the high-efficiency absorber, so that the tube wall of the high-efficiency absorber can be effectively protected from being damaged by high-temperature smoke.
3. The spraying direction of the high-efficiency spray head and the accident spray head is vertical upwards, the flue gas can be fully contacted with the alkali liquor liquid sprayed upwards reversely in the high-efficiency absorber, a turbulent flow area is formed in the high-efficiency absorber due to the fact that the spray heads are in a reverse spraying mode, the liquid is updated quickly, and the purposes of quickly cooling, deacidifying, desulfurizing and dedusting the flue gas are achieved.
4. The accident tank is respectively communicated with the accident spray head, the overflow device and the process water through a control valve and a pipeline, and the reverse spray circulating pump group is respectively communicated with the desulfurization tower, the waste liquid discharge outlet, the high-efficiency spray head and the accident tank through a pipeline and a control valve. This structural design can guarantee when not having taken place to have a power failure or equipment trouble, and the liquid in the accident groove is supplemented by contrary circulating pump group extraction liquid that spouts, and when having a power failure or equipment trouble is spouted contrary circulating pump group and can't be extracted liquid and is supplemented, the emergent liquid of cooling purification needs also can be satisfied as supplementary to the process water, can avoid causing the damage of follow-up equipment because of discharge flue gas high temperature.
5. The flue gas outlet of the deacidification tower is provided with the thermocouple, when the flue gas temperature monitored by the thermocouple reaches a set value, the thermocouple sends a signal to the controller, and the controller controls the accident spray head to carry out emergency spray cooling, so that the damage of subsequent equipment caused by overhigh temperature of the discharged flue gas is avoided.
6. And the water outlet of the standby circulating pump group is communicated with the standby spraying device through a pipeline. This structural design can guarantee, when discovery combustion gas does not reach the purification requirement, can open reserve circulating pump group and use spray set work, makes the flue gas purify once more to because reserve spray set's below is for packing defogging device, can increase the area of contact of liquid and flue gas after falling on packing defogging device from reserve spray set spun liquid, thereby further promote the purifying effect of flue gas.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
in the figure: 1 accident groove, 2 high-efficient absorbers, 3 overflow arrangement, 4 high-efficient shower nozzles, 5 accident shower nozzles, 6 flue gas entry, 7 PH meter, 8 deacidification towers, 9 reserve circulating pump package, 10 alkali lye circulating pump package, 11 alkali lye preparation groove, 12 mixer, 13 filler defogging devices, 14 reserve spray set, 15 baffling board defogging devices, 16 contrary-spraying circulating pump package, 17 thermocouples, 18 exhanst gas outlets, 19 areas teletransmission level gauges.
Detailed Description
As shown in figures 1 and 2, the incineration tail gas deacidification treatment device comprises a high-efficiency absorber 2, a deacidification tower 8, an accident tank 1, an alkali liquor preparation tank 11, a reverse spray circulation pump set 16, a standby circulation pump set 9 and an alkali liquor circulation pump set 10.
The upper end of high-efficient absorber 2 be equipped with into the mouth, advance mouth department and be equipped with overflow arrangement 3, the inside of high-efficient absorber 2 is equipped with high-efficient shower nozzle 4 and accident nozzle 5, the lower extreme of high-efficient absorber 2 and the flue gas entry 6 intercommunication of deacidification tower 8.
The deacidification tower 8 inside from up being equipped with flue gas entry 6, packing defogging device 13, reserve spray set 14, baffling board defogging device 15, exhanst gas outlet 18 down in proper order, the bottom holding alkali lye of desulfurizing tower 8, the bottom of desulfurizing tower 8 is passed through pipeline and control valve and is communicated with contrary spraying circulation pump package 16, reserve circulation pump package 9 and alkali lye circulation pump package 10 respectively, desulfurizing tower 8 is inside to be equipped with and to take teletransmission level gauge 19 and PH meter 7, exhanst gas outlet 6 pass through flue and chimney intercommunication, and be equipped with thermocouple 17 on the flue of exhanst gas outlet 6 department.
The accident tank 1 is respectively communicated with the accident nozzle 5, the overflow device 3 and the process water through a control valve and a pipeline.
The alkali liquor preparation tank 11 is communicated with the desulfurizing tower 8 through an alkali liquor circulating pump group 10, a control valve and a pipeline, and a water inlet of the alkali liquor circulating pump group 10 is communicated with process water through the control valve and the pipeline.
The reverse-spraying circulating pump set 16 is respectively communicated with the desulfurizing tower 8, the waste liquid discharge outlet, the high-efficiency spray head 4 and the accident slot 1 through pipelines and control valves.
The water outlet of the standby circulating pump unit 9 is communicated with a standby spraying device 14 through a pipeline.
The monitoring signal of PH meter 7, send to on the control valve of the pipeline between alkali lye preparation groove 11 and the desulfurizing tower 8 in real time, and this control valve is opened or is closed according to signal value is automatic, when detecting that the inside PH value of desulfurizing tower 8 is higher than the setting value, the control valve is automatic to be opened, alkali lye circulation pump package 10 takes out alkali lye in the alkali lye preparation groove 11 to the desulfurizing tower 8 in, when detecting that the inside PH value of desulfurizing tower 8 is less than the setting value, control valve self-closing, alkali lye circulation pump package 10 stop work.
The monitoring signal with the remote liquid level meter 19 inside the desulfurization tower 8 is sent to a control valve of a pipeline between the reverse-spraying circulation pump unit 16 and the waste liquid discharge outlet in real time, the control valve is automatically opened or closed according to a signal value, when the liquid level value detected by the remote liquid level meter 19 is higher than a set value, the control valve is automatically opened, the liquid in the desulfurization tower 8 is pumped to the waste liquid discharge outlet by the reverse-spraying circulation pump unit 16, and when the liquid level value detected by the remote liquid level meter 19 is lower than the set value, the control valve is automatically closed.
And the monitoring signal of the thermocouple 17 is sent to a control valve of a pipeline between the accident slot 1 and the accident nozzle 5 in real time, and the control valve is automatically opened or closed according to the signal value. When the temperature monitored by the thermocouple 17 is higher than a set value, the control valve is automatically opened, the accident nozzle 5 carries out emergency spraying cooling, and damage to subsequent equipment caused by overhigh temperature of the discharged flue gas is avoided. The control valve automatically closes when the temperature monitored by thermocouple 17 is below the set point.
The spraying directions of the high-efficiency spray head 4 and the accident spray head 5 are vertical upwards.
A liquid level meter is arranged in the accident tank 1.
A stirrer 12 is arranged in the alkali liquor preparation tank 11.
The present invention is not limited to the above-described embodiments.

Claims (4)

1. A deacidification treatment device for incineration tail gas is characterized by comprising a high-efficiency absorber, a deacidification tower, an accident tank, an alkali liquor preparation tank, a reverse-spraying circulating pump unit, a standby circulating pump unit and an alkali liquor circulating pump unit,
the upper end of the high-efficiency absorber is provided with a smoke inlet, the smoke inlet is provided with an overflow device, the high-efficiency absorber is internally provided with a high-efficiency spray head and an accident spray head, the lower end of the high-efficiency absorber is communicated with a smoke inlet of the deacidification tower,
the deacidification tower is internally provided with a flue gas inlet, a filler demisting device, a standby spraying device, a baffle plate demisting device and a flue gas outlet from bottom to top in sequence, alkali liquor is contained at the bottom of the desulfurization tower, the bottom of the desulfurization tower is respectively communicated with a reverse spray circulation pump set, a standby circulation pump set and an alkali liquor circulation pump set through a pipeline and a control valve, a remote transmission liquid level meter and a PH meter are arranged inside the desulfurization tower, the flue gas outlet is communicated with a chimney through a flue, and a thermocouple is arranged on the flue at the flue gas outlet,
the accident tank is respectively communicated with the accident nozzle, the overflow device and the process water through a control valve and a pipeline,
the alkali liquor preparation tank is communicated with the desulfurizing tower through an alkali liquor circulating pump unit, a control valve and a pipeline, a water inlet of the alkali liquor circulating pump unit is communicated with process water through the control valve and the pipeline,
the reverse-spraying circulating pump group is respectively communicated with the desulfurizing tower, the waste liquid discharge outlet, the high-efficiency spray head and the accident slot through pipelines and control valves,
the water outlet of the standby circulating pump group is communicated with the standby spraying device through a pipeline,
the monitoring signal of the PH meter is sent to a control valve of a pipeline between the alkali liquor preparation tank and the desulfurizing tower in real time, and the control valve is automatically opened or closed according to the signal value,
the monitoring signal with a remote transmission liquid level meter in the desulfurizing tower is sent to a control valve of a pipeline between the reverse-spraying circulating pump set and the waste liquid discharge outlet in real time, and the control valve is automatically opened or closed according to the signal value,
and the monitoring signal of the thermocouple is sent to a control valve of a pipeline between the accident slot and the accident nozzle in real time, and the control valve is automatically opened or closed according to the signal value.
2. The deacidification treatment device for the incineration exhaust gas as claimed in claim 1, wherein the spraying directions of the high-efficiency spray head and the accident spray head are vertical upward.
3. The deacidification treatment device for the incineration exhaust gas as claimed in claim 1 or 2, wherein a liquid level meter is arranged in the accident tank.
4. The deacidification treatment device for incineration exhaust gas as claimed in claim 1 or 2, wherein a stirrer is arranged in the lye preparation tank.
CN202110195400.2A 2021-02-19 2021-02-19 Deacidification treatment device for incineration tail gas Pending CN112933946A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114591761A (en) * 2022-03-17 2022-06-07 鄂尔多斯职业学院 Method for preparing hydrogen by coal gasification and acid gas removing device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE743390A (en) * 1968-12-24 1970-06-19
US3904735A (en) * 1972-03-07 1975-09-09 Union Carbide Corp Process for the selective removal of sulfur dioxide from effluent gases
CN206996226U (en) * 2017-07-07 2018-02-13 金川集团股份有限公司 A kind of flue gas during smelting desulfation dust-extraction device with flue gas cool-down mechanism
CN107961653A (en) * 2017-11-22 2018-04-27 中冶京诚工程技术有限公司 Improved process and system for flue gas desulfurization by double-alkali method
US20190070554A1 (en) * 2017-09-07 2019-03-07 Jiangnan Environmental Protection Group Inc. Method for controlling aerosol production during absorption in ammonia desulfurization
CN110345496A (en) * 2019-06-27 2019-10-18 江苏格兰环境科技有限公司 A kind of chemical waste liquid burned waste gas processing system
CN210171207U (en) * 2019-02-11 2020-03-24 北京美斯顿科技开发有限公司 Desulfurization acid making system
CN211753903U (en) * 2019-11-21 2020-10-27 江苏汇尔奇环境科技有限公司 Novel protection of high temperature flue gas washing tower device
CN214486372U (en) * 2021-02-19 2021-10-26 陈洪超 Deacidification treatment device for incineration tail gas

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE743390A (en) * 1968-12-24 1970-06-19
US3904735A (en) * 1972-03-07 1975-09-09 Union Carbide Corp Process for the selective removal of sulfur dioxide from effluent gases
CN206996226U (en) * 2017-07-07 2018-02-13 金川集团股份有限公司 A kind of flue gas during smelting desulfation dust-extraction device with flue gas cool-down mechanism
US20190070554A1 (en) * 2017-09-07 2019-03-07 Jiangnan Environmental Protection Group Inc. Method for controlling aerosol production during absorption in ammonia desulfurization
CN107961653A (en) * 2017-11-22 2018-04-27 中冶京诚工程技术有限公司 Improved process and system for flue gas desulfurization by double-alkali method
CN210171207U (en) * 2019-02-11 2020-03-24 北京美斯顿科技开发有限公司 Desulfurization acid making system
CN110345496A (en) * 2019-06-27 2019-10-18 江苏格兰环境科技有限公司 A kind of chemical waste liquid burned waste gas processing system
CN211753903U (en) * 2019-11-21 2020-10-27 江苏汇尔奇环境科技有限公司 Novel protection of high temperature flue gas washing tower device
CN214486372U (en) * 2021-02-19 2021-10-26 陈洪超 Deacidification treatment device for incineration tail gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114591761A (en) * 2022-03-17 2022-06-07 鄂尔多斯职业学院 Method for preparing hydrogen by coal gasification and acid gas removing device

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