Waste gas purification and adsorption device

Abstract

The utility model relates to a waste gas purification and adsorption device which comprises an activated carbon adsorption tower, an activated carbon desorption tower and a connecting channel, the activated carbon adsorption tower and the activated carbon desorption tower are connected through connecting channels; the connecting channels and the activated carbon layers are arranged in a one-to-one correspondence manner; the activated carbon layer can move back and forth between the activated carbon adsorption tower and the activated carbon desorption tower; a high-pressure low-temperature nitrogen inlet is formed in the connecting channel, and electric gate valves are arranged at the two ends of the communicating channel respectively; a steam inlet is formed in the bottom of the activated carbon desorption tower; a desorption gas outlet is formed in the top. The activated carbon desorption tower is arranged on one side of the activated carbon adsorption tower, after activated carbon in the activated carbon adsorption tower is saturated, the activated carbon can be quickly desorbed and regenerated only by integrally translating and feeding an activated carbon layer into the activated carbon desorption tower, and the activated carbon adsorption tower is connected with the activated carbon desorption tower through the connecting channel; when the desorbed activated carbon layer passes through the connecting channel, low-temperature nitrogen is introduced to cool the desorbed activated carbon layer, so that the adsorption efficiency of the waste gas is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial waste gas purification and treatment, in particular to a waste gas purification adsorption device capable of realizing rapid desorption and regeneration of an adsorbent. Background Art

[0002] Activated carbon is a carbonaceous adsorption material with a highly developed pore structure and a huge specific surface area. With the rapid development of industry, the emission of various waste gases, wastewater and other pollutants has continued to increase, which has put forward higher requirements for purification and treatment technology. The activated carbon adsorption device utilizes the adsorption characteristics of activated carbon to effectively remove harmful substances in gas or liquid, such as volatile organic compounds (VOCs), odors, heavy metal ions, etc. It has the advantages of strong adsorption capacity, relatively simple operation, and low operating cost. In addition, activated carbon can be reused through desorption and regeneration, so it is widely used in many fields.

[0003] The activated carbon adsorption device suitable for waste gas purification is suitable for the purification and treatment of low-concentration and large-volume organic waste gas. It has the advantages of mature technology, stable performance, strong adsorption capacity, recyclable organic matter, low tail gas emission concentration, safety and reliability. The activated carbon adsorption device mainly uses the activated carbon adsorption layer to filter and adsorb organic waste gas and dust in the waste gas to achieve the effect of purifying organic waste gas and removing dust. Since the activated carbon is easily saturated when the waste gas concentration is high or there is a large amount of oil smoke and dust gas, the activated carbon needs to be replaced frequently, and the cost of activated carbon is relatively high. In addition, the activated carbon itself after adsorption is also a hazardous waste and is easy to cause pollution. Therefore, most companies repeatedly recycle the activated carbon through activated carbon desorption and regeneration, which can not only greatly reduce the company's waste gas treatment costs, but also is beneficial to environmental protection.

[0004] Activated carbon desorption is the reverse process of adsorption. It is an operational process in which the adsorbed components are precipitated from the saturated adsorbent and the adsorbent is regenerated. That is, the process in which the substance adsorbed on the interface leaves the interface and re-enters the bulk phase under certain conditions is also called desorption. The regeneration methods of activated carbon include thermal regeneration, wet oxidation regeneration, solvent regeneration, electrochemical regeneration, etc. Among them, the high-temperature thermal regeneration method is to heat the honeycomb activated carbon by heating, so that the organic matter adsorbed by the honeycomb activated carbon is carbonized and decomposed at high temperature, and finally becomes gas to escape, so that the honeycomb activated carbon is regenerated. High-temperature thermal regeneration can not only remove the organic matter adsorbed by the carbon, but also generate new micropores in the carbon, so that the activity of the carbon is fundamentally restored. Although the carbon loss during the thermal regeneration process is large (generally 5% to 10%), and the mechanical strength of the regenerated carbon decreases. However, due to its advantages of high regeneration efficiency and short regeneration time, it is still the most mature and industrially applied activated carbon regeneration method. Summary of the invention

[0005] The utility model provides a waste gas purification adsorption device, wherein an activated carbon desorption tower is arranged on one side of an activated carbon adsorption tower, after the activated carbon in the activated carbon adsorption tower is saturated, the activated carbon layer only needs to be moved horizontally as a whole into the activated carbon desorption tower, so that it can be quickly desorbed and regenerated, the activated carbon adsorption tower and the activated carbon desorption tower are connected through a connecting channel, and low-temperature nitrogen is introduced into the activated carbon layer after desorption when passing through the connecting channel to cool it, so as to ensure the adsorption efficiency of the waste gas.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A waste gas purification adsorption device comprises an activated carbon adsorption tower, wherein a plurality of activated carbon layers are arranged in the activated carbon adsorption tower, and a spray device is correspondingly arranged in the tower body above each activated carbon layer; a waste gas inlet is arranged on one side of the lower part of the activated carbon adsorption tower, and a purified gas outlet is arranged on the top of the activated carbon adsorption tower; the waste gas purification adsorption device also comprises an activated carbon desorption tower and a connecting channel; the activated carbon adsorption tower is connected to the activated carbon desorption tower through a plurality of connecting channels, and the connecting channels are arranged one by one corresponding to the activated carbon layers; supporting layers are correspondingly arranged in the activated carbon adsorption tower, the connecting channel and the activated carbon desorption tower, a track is arranged on the top of the supporting layer, and a running wheel is arranged on the bottom of the activated carbon layer, and the activated carbon layer can move back and forth between the activated carbon adsorption tower and the activated carbon desorption tower along the corresponding track through the running wheel; a high-pressure and low-temperature nitrogen inlet is arranged on the connecting channel, and electric gate valves are respectively arranged at both ends of the connecting channel; a steam inlet is arranged at the bottom of the activated carbon desorption tower, and a desorption gas outlet is arranged at the top of the activated carbon desorption tower.

[0008] Furthermore, the spray device of the activated carbon adsorption tower is connected to the spray water pipe, and an electric valve is provided on the spray water pipe close to the activated carbon adsorption tower; the exhaust gas inlet of the activated carbon adsorption tower is connected to the exhaust gas inlet pipe, and a temperature detection device is provided on the exhaust gas inlet pipe; the temperature detection device is interlocked with the electric valve for control.

[0009] Furthermore, a dust removal device is provided on the exhaust gas inlet pipe upstream of the temperature detection device.

[0010] Furthermore, the activated carbon adsorption tower is provided with an activated carbon feed / discharge port on one side of the tower wall corresponding to each activated carbon layer.

[0011] Furthermore, the activated carbon adsorption tower has manholes correspondingly opened on the tower wall above each activated carbon layer.

[0012] Furthermore, the cross-section of the activated carbon adsorption tower is rectangular.

[0013] Furthermore, the desorbed gas outlet is connected to a condensing device via a desorbed gas pipeline.

[0014] Furthermore, the activated carbon layer is composed of a mobile trolley and activated carbon; the mobile trolley is composed of a grille bottom plate, a surrounding plate and moving wheels, the grille bottom plate and the surrounding plate form a trough structure, and the inside of the trough structure is filled with activated carbon; a plurality of running wheels are arranged at the bottom of the grille bottom plate.

[0015] Furthermore, the running wheels are electric wheels.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] An activated carbon desorption tower is arranged on one side of the activated carbon adsorption tower. When the activated carbon in the activated carbon adsorption tower is saturated, the activated carbon layer only needs to be moved horizontally as a whole into the activated carbon desorption tower for rapid desorption and regeneration. The activated carbon adsorption tower and the activated carbon desorption tower are connected through a connecting channel. When the desorbed activated carbon layer passes through the connecting channel, low-temperature nitrogen is introduced to cool it to ensure the adsorption efficiency of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an exhaust gas purification adsorption device described in the utility model. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the structure of an exhaust gas purification adsorption device described in the utility model. Figure 2 .

[0020] In the figure: 1. Activated carbon adsorption tower 101. Activated carbon layer 102. Spraying device 103. Waste gas inlet pipe 104. Purified gas outlet 105. Spray water pipe 106. Electric valve 107. Temperature detection device 108. Activated carbon feed / discharge port 109. Manhole 110. Sewage outlet 2. Activated carbon desorption tower 201. Support layer 202. Steam inlet 203. Desorption gas outlet 3. Connecting channel 301. Electric gate valve 302. High-pressure and low-temperature nitrogen inlet DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:

[0022] like Figure 1As shown, the waste gas purification adsorption device described in the utility model includes an activated carbon adsorption tower 1, wherein the activated carbon adsorption tower 1 is provided with a plurality of activated carbon layers 101, and a spray device 102 is correspondingly arranged in the tower body above each activated carbon layer 101; a waste gas inlet is arranged on one side of the lower part of the activated carbon adsorption tower 1, and a purified gas outlet 104 is arranged on the top of the activated carbon adsorption tower 1; the waste gas purification adsorption device also includes an activated carbon desorption tower 2 and a connecting channel 3; the activated carbon adsorption tower 1 is connected to the activated carbon desorption tower 2 through a plurality of connecting channels 3, and the connecting channel 3 is connected to the activated carbon layer 10 1 are arranged in a one-to-one correspondence; a support layer 201 is correspondingly arranged in the activated carbon adsorption tower 1, the connecting channel 3 and the activated carbon desorption tower 2, a track is arranged on the top of the support layer 201, and a running wheel is arranged at the bottom of the activated carbon layer 101, through which the activated carbon layer 101 can move back and forth between the activated carbon adsorption tower 1 and the activated carbon desorption tower 2 along the corresponding track; a high-pressure and low-temperature nitrogen inlet 302 is arranged on the connecting channel 3, and electric gate valves 301 are respectively arranged at both ends of the connecting channel 3; a steam inlet 202 is arranged at the bottom of the activated carbon desorption tower 2, and a desorption gas outlet 203 is arranged at the top of the activated carbon desorption tower 2.

[0023] Furthermore, the spray device 102 of the activated carbon adsorption tower 1 is connected to the spray water pipe 105, and an electric valve 106 is provided on the spray water pipe 105 close to the activated carbon adsorption tower 1; the exhaust gas inlet of the activated carbon adsorption tower 1 is connected to the exhaust gas inlet pipe 103, and a temperature detection device 107 is provided on the exhaust gas inlet pipe 103; the temperature detection device 107 is interlocked with the electric valve 106 for control.

[0024] Furthermore, a dust removal device is provided on the exhaust gas inlet pipe 103 upstream of the temperature detection device 107 .

[0025] Furthermore, the activated carbon adsorption tower 1 is provided with an activated carbon feed / discharge port 108 on one side of the tower wall corresponding to each activated carbon layer 101 .

[0026] Furthermore, the activated carbon adsorption tower 1 has manholes 109 correspondingly opened on the tower wall above each activated carbon layer 101 .

[0027] Furthermore, the cross section of the activated carbon adsorption tower 1 is rectangular.

[0028] Furthermore, the desorbed gas outlet 203 is connected to a condensing device via a desorbed gas pipeline.

[0029] Furthermore, the activated carbon layer 101 is composed of a mobile trolley and activated carbon; the mobile trolley is composed of a grille bottom plate, a surrounding plate and moving wheels, the grille bottom plate and the surrounding plate form a trough structure, and the inside of the trough structure is filled with activated carbon; a plurality of running wheels are arranged at the bottom of the grille bottom plate.

[0030] Furthermore, the running wheels are electric wheels.

[0031] The utility model discloses an exhaust gas purification adsorption device, which is composed of three parts: an activated carbon adsorption tower 1, an activated carbon desorption tower 2 and a connecting channel 3.

[0032] The main structure of the activated carbon adsorption tower 1 is a conventional structure, that is, an exhaust gas inlet is provided on the side of the tower body, a purified gas outlet 104 is provided on the top of the tower body, and several layers of activated carbon layers 101 are provided in the tower body. A spray device 102 for emergency cooling is provided above each activated carbon layer 101. The spray device 102 is composed of multiple rows of spray pipes arranged along the cross section of the tower body. Multiple nozzles are provided longitudinally on the spray pipes, and filters are provided on the nozzles. A sewage outlet 110 is provided at the bottom of the tower body to discharge sewage generated during the spraying process; multiple activated carbon feed / discharge ports 108 and manholes 109 are provided on the side of the tower body corresponding to the activated carbon layer 101. The activated carbon feed / discharge port 108 is used to add or replace activated carbon to the activated carbon layer 101. The manhole 109 is used for equipment inspection and maintenance.

[0033] The tower body of the activated carbon adsorption tower 1 is a sealed structure made of corrosion-resistant steel plates. The exhaust gas enters from the lower part of the tower body through the exhaust gas inlet, and is adsorbed and purified by multiple layers of activated carbon layers 101 during the upward flow. The purified gas flows out from the purified gas outlet 104 at the top.

[0034] In the present invention, in order to ensure the purification efficiency of the activated carbon adsorption tower 1, as a preferred embodiment, a dust removal device is provided on the exhaust gas inlet pipe 103 to remove large particles of impurities in the exhaust gas.

[0035] In the utility model, a temperature detection device 107 is also provided on the exhaust gas inlet pipe 103, and an electric valve 106 is also provided on the spray water pipe 105 connected to the spray device 102. The temperature detection device 107 realizes interlocking control with the electric valve 106 through the control system. When the activated carbon adsorption tower 1 is in a normal working state, the electric valve 106 is in a normally closed state. The temperature of the exhaust gas entering the activated carbon adsorption tower 1 is monitored in real time by the temperature detection device 107. When the temperature of the exhaust gas entering the tower body is higher than the set safety threshold, the control system sends a control signal to the electric valve 106, and the electric valve 106 automatically opens, and cooling water enters the spray device 102, and the activated carbon layer 101 is sprayed in time for emergency cooling to prevent the activated carbon from burning due to excessive temperature in the tower body.

[0036] As a preferred embodiment, the activated carbon of the utility model is arranged on a mobile trolley, which is composed of a grille bottom plate, a panel and running wheels; the grille bottom plate and the panel form a trough structure, and the activated carbon is filled inside to form an activated carbon layer; the panel has a through hole at the corresponding activated carbon feed / discharge port 108, and the through hole is closed by a movable baffle. The mobile trolley is supported by a support layer 201, which is composed of a plurality of support beams, and a track is arranged on the support layer 201.

[0037] The utility model adds an activated carbon desorption tower 2 on one side of the activated carbon adsorption tower 1, and connects the two through a connecting channel 3. The purpose is to achieve rapid desorption and regeneration of the activated carbon layer 101 in the activated carbon adsorption tower 1. A plurality of activated carbon layers 101 are arranged in the activated carbon adsorption tower 1. When the activated carbon is saturated after working for a period of time, each layer of the activated carbon layer 101 can be desorbed and regenerated separately, and the desorption and regeneration process does not affect the normal operation of the activated carbon adsorption tower 1 (an additional activated carbon layer 101 can be added to the activated carbon adsorption tower 1 based on the original design). Preferably, the activated carbon layers 101 are desorbed and regenerated in sequence from bottom to top (such as Figure 2 This is because the bottommost activated carbon layer 101 is the first to come into contact with the exhaust gas entering the tower body and is the first to reach saturation.

[0038] The utility model uses steam to desorb and regenerate the activated carbon layer 101 in the activated carbon desorption tower 1, and the best desorption effect can be achieved by maintaining the steam temperature at about 150° C. The desorbed gas generated after the activated carbon is desorbed and regenerated is sent to the condensation device for condensation treatment.

[0039] Since the activated carbon has the best adsorption effect at about 40°C, in order to ensure that the activated carbon layer 101 can be restored to the optimal adsorption temperature as soon as possible after high-temperature steam desorption, the utility model sets a high-pressure and low-temperature nitrogen inlet 302 in the connecting channel 3, which is used to introduce high-pressure and low-temperature nitrogen into the connecting channel 3 to quickly cool the activated carbon layer 101 returned to the activated carbon adsorption tower 1 after desorption; nitrogen is used to avoid oxygen in the cooling gas that causes activated carbon combustion, and nitrogen also has a certain desorption effect on activated carbon during the cooling process. The introduction of nitrogen will not affect the activated carbon desorption tower 2.

[0040] Electric gate valves 301 are respectively provided at both ends of the connecting channel 3. When the activated carbon adsorption tower 1 works normally, the electric gate valves 301 are in a normally closed state. When the activated carbon layer 101 needs to be desorbed and regenerated, the two electric gate valves 301 are opened, and after the desorbed and regenerated activated carbon layer 101 enters the activated carbon desorption tower 2, the two electric gate valves 301 are closed again; the activated carbon adsorption tower 1 and the activated carbon desorption tower 2 perform adsorption and desorption operations respectively without affecting each other.

[0041] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An exhaust gas purification adsorption device, comprising an activated carbon adsorption tower, wherein the activated carbon adsorption tower is provided with a plurality of activated carbon layers, and a spray device is correspondingly provided in the tower body above each activated carbon layer; an exhaust gas inlet is provided on one side of the lower part of the activated carbon adsorption tower, and a purified gas outlet is provided on the top of the activated carbon adsorption tower; characterized in that, The exhaust gas purification adsorption device also includes an activated carbon desorption tower and a connecting channel; the activated carbon adsorption tower is connected to the activated carbon desorption tower through a plurality of connecting channels, and the connecting channels are arranged one by one with the activated carbon layers; supporting layers are arranged correspondingly in the activated carbon adsorption tower, the connecting channel and the activated carbon desorption tower, a track is arranged on the top of the supporting layer, and a running wheel is arranged on the bottom of the activated carbon layer, and the activated carbon layer can move back and forth between the activated carbon adsorption tower and the activated carbon desorption tower along the corresponding track through the running wheel; a high-pressure and low-temperature nitrogen inlet is arranged on the connecting channel, and electric gate valves are arranged at both ends of the connecting channel; a steam inlet is arranged at the bottom of the activated carbon desorption tower, and a desorption gas outlet is arranged at the top of the activated carbon desorption tower.

2. The exhaust gas purification adsorption device according to claim 1, characterized in that: The spray device of the activated carbon adsorption tower is connected to the spray water pipeline, and an electric valve is arranged on the spray water pipeline close to the activated carbon adsorption tower; the exhaust gas inlet of the activated carbon adsorption tower is connected to the exhaust gas inlet pipeline, and a temperature detection device is arranged on the exhaust gas inlet pipeline; the temperature detection device is interlocked with the electric valve for control.

3. The exhaust gas purification adsorption device according to claim 2, characterized in that: A dust removal device is provided on the exhaust gas inlet pipeline upstream of the temperature detection device.

4. The exhaust gas purification adsorption device according to claim 1, characterized in that: The activated carbon adsorption tower is provided with an activated carbon feed / discharge port on one side of the tower wall corresponding to each activated carbon layer.

5. The exhaust gas purification adsorption device according to claim 1, characterized in that: The activated carbon adsorption tower has corresponding manholes on the tower wall above each activated carbon layer.

6. The exhaust gas purification adsorption device according to claim 1, characterized in that: The cross section of the tower body of the activated carbon adsorption tower is rectangular.

7. The exhaust gas purification adsorption device according to claim 1, characterized in that: The desorbed gas outlet is connected to a condensing device via a desorbed gas pipeline.

8. The exhaust gas purification adsorption device according to claim 1, characterized in that: The activated carbon layer is composed of a mobile trolley and activated carbon; the mobile trolley is composed of a grille bottom plate, a surrounding plate and moving wheels; the grille bottom plate and the surrounding plate form a trough structure, and the inside of the trough structure is filled with activated carbon; A plurality of running wheels are arranged at the bottom of the grille bottom plate.

9. The exhaust gas purification adsorption device according to claim 8, characterized in that: The running wheels are electric wheels.

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