CN-224215354-U - Tail gas treatment system

Abstract

The utility model relates to a tail gas treatment system which comprises a heat accumulating type incinerator, an adsorption and desorption tank, a waste heat boiler, a first pretreatment device, a second pretreatment device and a third pretreatment device, wherein a first gas outlet of a combustion chamber in the heat accumulating type incinerator is communicated with a first gas inlet of the waste heat boiler through a pipeline, a second gas outlet of the heat accumulating type incinerator is communicated with a second gas inlet of the waste heat boiler through a pipeline, a first steam outlet of the waste heat boiler is communicated with a steam pipe inlet of the adsorption and desorption tank through a pipeline, gas inlets of the heat accumulating type incinerator are respectively communicated with gas outlet ends of tail gas of the second pretreatment device and the third pretreatment device through pipelines, and gas outlet ends of tail gas of the first pretreatment device are communicated with gas inlets of the adsorption and desorption tank through pipelines. The method has the advantages that steam generated by the waste heat boiler is supplied to the adsorption and desorption tank, no additional heat source is needed, the heat energy utilization rate is improved, the treatment system structure is simplified, and the cost is reduced.

Inventors

• ZHU YIMENG
• LEI SHUGANG

Assignees

• 武汉时泰环保科技有限公司

Dates

Publication Date

20260508

Application Date

20250605

Claims (10)

1. 1. The tail gas treatment system is characterized by comprising a heat accumulating type incinerator (1), an adsorption and desorption tank (2), a waste heat boiler (3), a first pretreatment device (4), a second pretreatment device (5) and a third pretreatment device (6); A first air outlet A1 of a combustion chamber in the heat accumulating type incinerator (1) is communicated with a first air inlet B1 of the waste heat boiler (3) through a pipeline, a second air outlet A2 of the heat accumulating type incinerator (1) is communicated with a second air inlet B2 of the waste heat boiler (3) through a pipeline, and a first steam outlet of the waste heat boiler (3) is communicated with a steam pipe inlet of the adsorption and desorption tank (2) through a pipeline; The air inlet of the heat accumulating type incinerator (1) is respectively communicated with the air outlet ends of the tail gas of the second pretreatment device (5) and the third pretreatment device (6) through pipelines, and the air outlet end of the tail gas of the first pretreatment device (4) is communicated with the air inlet of the adsorption and desorption tank (2) through a pipeline; The first pretreatment device (4) is used for treating halogen-containing waste gas, the second pretreatment device (5) and the third pretreatment device (6) are both used for treating halogen-free waste gas, and the concentration of the waste gas treated by the second pretreatment device (5) is higher than that of the waste gas treated by the third pretreatment device (6).
2. 2. An exhaust gas treatment system according to claim 1, wherein the air outlet of the third pretreatment device (6) is communicated with the rotating wheel (7) through a pipeline, and an air outlet of the regeneration zone in the rotating wheel (7) is communicated with an air inlet of the heat exchanger (8) through a pipeline, so that the exhaust gas is introduced into the heat exchanger (8) for heat exchange and then discharged to the rotating wheel (7) to serve as a desorption air source.
3. 3. An exhaust gas treatment system according to claim 2, characterized in that the other air outlet of the regeneration zone in the rotor (7) is in communication with the air inlet of the regenerative incinerator (1) via a pipe for discharging the exhaust gas after the desorption of the regeneration zone in the rotor (7); The adsorption zone in the rotating wheel (7) purifies and discharges the waste gas from the third pretreatment device (6).
4. 4. An exhaust gas treatment system according to claim 2, characterized in that the first air outlet A1 of the combustion chamber in the regenerative burner (1) is in communication with the heat exchanger (8) via a pipe.
5. 5. An exhaust gas treatment system according to claim 2, characterized in that an air outlet of the heat exchanger (8) is in communication with the second air inlet B2 of the exhaust-heat boiler (3) via a pipe.
6. 6. A tail gas treatment system according to claim 1, characterized in that the tail gas outlet of the adsorption and desorption tank (2) is in communication with the gas inlet of the regenerative incinerator (1) through a pipe.
7. 7. A tail gas treatment system according to claim 1, characterized in that the tail gas outlet of the second pretreatment device (5) is in communication with the air inlet of the regenerative burner (1) via a pipe.
8. 8. The tail gas treatment system according to claim 1, wherein the first pretreatment device (4), the second pretreatment device (5) and the third pretreatment device (6) are combinations of at least two of a pickling tower, an alkaline tower and a water tower.
9. 9. An exhaust gas treatment system according to claim 1, characterized in that the exhaust-heat boiler (3) is provided with a second steam outlet.
10. 10. The exhaust gas treatment system according to claim 1, wherein the adsorbent in the adsorption and desorption tank (2) is one of resin and activated carbon.

Description

Tail gas treatment system Technical Field The utility model relates to the technical field of environmental protection, in particular to a tail gas treatment system. Background Halogen-containing exhaust gases are highly corrosive and direct access to the RTO (regenerative oxidation technology) can cause severe corrosion to metal components and heat exchange media within the RTO. This results in reduced equipment life, increased equipment maintenance and replacement costs. Such as some chlorides, can produce toxic gases, such as chlorine, etc., under certain high temperature conditions. These toxic gases can pose a safety hazard to RTO equipment and operators, and pose a hazard to the environment and human health. The halogen-containing waste gas and the halogen-free waste gas are usually treated separately, the halogen-containing waste gas enters an adsorption and desorption system, the halogen-free waste gas enters an RTO system, and the adsorption and desorption system and the RTO system are treated independently. However, the conventional desorption steam is usually provided by a factory boiler or an electric heating device, and at least has the problems of high extra energy consumption and high operation cost, so that the aim of achieving high efficiency and energy conservation is to be solved. Disclosure of utility model Aiming at the technical problems in the prior art, the utility model provides the tail gas treatment system, which can generate steam by recovering the waste heat in the flue gas, reduce the energy consumption of the system and realize the cascade utilization of energy. The utility model solves the technical problems by adopting the technical scheme that the tail gas treatment system comprises a heat accumulating type incinerator, an adsorption and desorption tank, a waste heat boiler, a first pretreatment device, a second pretreatment device and a third pretreatment device; a first air outlet A1 of a combustion chamber in the heat accumulating type incinerator is communicated with a first air inlet B1 of the waste heat boiler through a pipeline, a second air outlet A2 of the heat accumulating type incinerator is communicated with a second air inlet B2 of the waste heat boiler through a pipeline, and a first steam outlet of the waste heat boiler is communicated with a steam pipe inlet of the adsorption and desorption tank through a pipeline; The air inlet of the heat accumulating type incinerator is respectively communicated with the air outlet ends of the tail gas of the second pretreatment device and the third pretreatment device through pipelines, and the air outlet end of the tail gas of the first pretreatment device is communicated with the air inlet of the adsorption and desorption tank through a pipeline; The first pretreatment device is used for treating halogen-containing waste gas, the second pretreatment device and the third pretreatment device are both used for treating halogen-free waste gas, and the concentration of the waste gas treated by the second pretreatment device is higher than that of the waste gas treated by the third pretreatment device. As a further technical scheme, the air outlet of the third pretreatment device is communicated with the rotating wheel through a pipeline, and an air outlet of the regeneration zone in the rotating wheel is communicated with an air inlet of the heat exchanger through a pipeline, so that waste gas is introduced into the heat exchanger for heat exchange and then is discharged to the rotating wheel to serve as a desorption air source. As a further technical scheme, the other air outlet of the regeneration zone in the rotating wheel is communicated with the air inlet of the heat accumulating type incinerator through a pipeline so as to discharge the waste gas after the desorption of the regeneration zone in the rotating wheel; And the adsorption area in the rotating wheel purifies and discharges the waste gas from the third pretreatment device. As a further technical scheme, a first air outlet A1 of a combustion chamber in the regenerative incinerator is communicated with the heat exchanger through a pipeline. As a further technical scheme, an air outlet of the heat exchanger is communicated with a second air inlet B2 of the waste heat boiler through a pipeline. As a further technical scheme, the tail gas outlet of the adsorption and desorption device is communicated with the gas inlet of the heat accumulating type incinerator through a pipeline. As a further technical scheme, the tail gas outlet of the second pretreatment device is communicated with the gas inlet of the heat accumulating type incinerator through a pipeline. As a further technical scheme, the first pretreatment device, the second pretreatment device and the third pretreatment device are all combinations of at least two of an acid washing tower, an alkali washing tower and a water washing tower. As a further technical scheme, the waste heat boiler is provided with