Salicylic acid tail gas drying and recycling device

Abstract

The utility model relates to salicylic acid processing technical field, specifically to a kind of salicylic acid tail gas drying recovery device.The utility model discloses salicylic acid tail gas drying recovery device includes heating device, absorption device, purification device;Heating device includes heating box, air inlet, first passage, several electric heating plates, salicylic acid tail gas enters heating box in air inlet, heating tail gas is heated by electric heating plate, so as to be absorbed by salicylic acid absorption liquid better;Absorption device includes absorption liquid tank, absorption bin, drainage network, second passage, atomizer, and salicylic acid absorption liquid in absorption liquid tank is atomized by atomizer and is sprayed towards absorption bin, salicylic acid absorption liquid converges downward by drainage network to be recycled;Purification device includes purification box, adsorption filler groove, several air holes, and residual tail gas enters purification box in second passage, tail gas passes through air hole and is purified by purifying agent in adsorption filler groove to tail gas, more environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of salicylic acid processing technology, specifically to a salicylic acid tail gas drying and recovery device. Background Technology

[0002] Salicylic acid, an organic acid with the chemical formula C7H6O3, is a white crystalline powder, slightly soluble in cold water, readily soluble in hot water, ethanol, ether, and acetone, and soluble in hot benzene. It is primarily used as an important raw material in pharmaceuticals, fragrances, dyes, pesticides, rubber additives, and other fine chemicals. The main advantage of flash drying for salicylic acid lies in its ability to effectively improve the purity and crystallinity of the product. However, the exhaust gas emitted during the flash drying process of salicylic acid has adverse environmental impacts, necessitating its recovery and treatment.

[0003] For example, patent CN221859175U discloses a flash drying and recovery device for salicylic acid production, including a shell with an inlet at the top and an outlet at the bottom. A dehumidification zone is located at the bottom of the inlet, comprising a first confluence section, a distributor at the bottom of the first confluence section, a packing section at the bottom of the distributor, and a second confluence section at the bottom of the dehumidification zone. A pressure regulating mechanism is located at the second confluence section, and a heating zone is located at the bottom of the second confluence section. Electric heating tubes are evenly arranged inside the heating zone. Air ducts are connected to both the inlet and outlet, and an induced draft fan is installed on the duct. The air is dehumidified and heated through the dehumidification and heating zones inside the shell, and then re-entered into the flash dryer for reuse. This ensures the recovery and reuse of waste heat from the exhaust gas, reduces the energy consumption for air preheating in the flash dryer, and thus reduces the corresponding production costs for enterprises.

[0004] Existing salicylic acid tail gas recovery devices cannot recover residual materials in the tail gas. Therefore, it is necessary to design a salicylic acid tail gas drying and recovery device that can recover residual materials. Utility Model Content

[0005] The purpose of this invention is to solve at least one of the technical problems existing in the prior art and to provide a salicylic acid tail gas drying and recovery device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a salicylic acid tail gas drying and recovery device, comprising a heating device, an absorption device, and a purification device;

[0007] The heating device includes a heating box, an air inlet, a first channel, and several electric heating plates. The air inlet is located at the left end of the heating box, the first channel is located at the right end of the heating box, and several electric heating plates are vertically distributed inside the heating box. The electric heating plates are used to heat the salicylic acid exhaust gas.

[0008] The absorption device includes an absorption liquid tank, an absorption chamber, a drainage net, a second channel, and an atomizer. The absorption liquid tank contains salicylic acid absorption liquid. The absorption chamber is located below the absorption liquid tank. The left end of the absorption chamber is connected to the first channel. The drainage net is disposed inside the absorption chamber. The second channel is disposed at the right end of the absorption chamber. The atomizer is disposed at the bottom of the absorption liquid tank. The atomizer is used to atomize the salicylic acid absorption liquid and spray it toward the absorption chamber.

[0009] The purification device includes a purification box, an adsorption packing tank, and several air holes. The left end of the purification box is connected to the second channel. The adsorption packing tank is located inside the purification box and is filled with a purifying agent. The air holes penetrate the adsorption packing tank from left to right.

[0010] Furthermore, several of the heating plates are arranged alternately in the heating box to form an S-shaped channel.

[0011] Furthermore, a temperature sensor and a solenoid valve are sequentially installed in the first channel. When the temperature sensor detects that the temperature of the salicylic acid exhaust gas reaches a preset temperature, the solenoid valve opens.

[0012] Furthermore, the drainage net has a V-shaped structure.

[0013] Furthermore, the bottom of the absorption tank is connected to several conduits, which extend downwards to abut against the drainage net.

[0014] Furthermore, an atomizing nozzle is provided at the bottom of the atomizer, and the atomizing nozzle sprays water toward the absorption chamber.

[0015] Furthermore, fans are installed on both sides of the drainage net.

[0016] Furthermore, the top of the absorption tank is provided with an inlet, the bottom of the absorption chamber is provided with an outlet, and the outlet is connected to a recovery tank.

[0017] Furthermore, a filter membrane is provided in the second channel, which is used to block mist and allow gas to pass through.

[0018] Furthermore, the right end of the purification box is connected to an air outlet.

[0019] As described above, compared with the prior art, the salicylic acid exhaust gas drying and recovery device of this utility model includes a heating device, an absorption device, and a purification device. The heating device includes a heating box, an air inlet, a first channel, and several electric heating plates. The salicylic acid exhaust gas enters the heating box through the air inlet and is heated by the electric heating plates to better absorb the salicylic acid absorbent. The absorption device includes an absorbent tank, an absorption chamber, a guide net, a second channel, and an atomizer. The atomizer atomizes the salicylic acid absorbent in the absorbent tank and sprays it toward the absorption chamber. The residual material in the exhaust gas enters the absorption chamber through the first channel and is fully absorbed by the salicylic acid absorbent. The salicylic acid absorbent is collected downwards by the guide net for recycling. The purification device includes a purification box, an adsorption packing tank, and several air holes. The remaining exhaust gas enters the purification box through the second channel. The exhaust gas passes through the air holes and is purified by the purifying agent in the adsorption packing tank, making it more environmentally friendly. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of a salicylic acid tail gas drying and recovery device in a preferred embodiment of the present invention;

[0021] Figure 2 This is a side view of the drainage net and catheter in a preferred embodiment of the present invention;

[0022] The following are the labels in the diagram: 1. Heating device; 2. Absorption device; 3. Purification device; 101. Heating box; 102. Air inlet; 103. First channel; 104. Heating plate; 105. S-shaped channel; 106. Temperature sensor; 107. Solenoid valve; 201. Absorption liquid tank; 202. Absorption chamber; 203. Drainage net; 204. Second channel; 205. Atomizer; 206. Conduit; 207. Atomizing nozzle; 208. Fan; 209. Liquid inlet; 210. Liquid outlet; 211. Recovery box; 212. Filter membrane; 301. Purification box; 302. Adsorption packing tank; 303. Air hole; 304. Air outlet. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Reference Figures 1-2 As shown in the preferred embodiment of this utility model, a salicylic acid tail gas drying and recovery device includes a heating device 1, an absorption device 2, and a purification device 3.

[0027] The heating device 1 includes a heating box 101, an air inlet 102, a first channel 103, and a plurality of electric heating plates 104. The air inlet 102 is located at the left end of the heating box 101, the first channel 103 is located at the right end of the heating box 101, and the plurality of electric heating plates 104 are vertically distributed inside the heating box 101. The electric heating plates 104 are used to heat the salicylic acid exhaust gas.

[0028] The absorption device 2 includes an absorption liquid tank 201, an absorption chamber 202, a drainage net 203, a second channel 204, and an atomizer 205. The absorption liquid tank 201 contains salicylic acid absorption liquid. The absorption chamber 202 is located below the absorption liquid tank 201. The left end of the absorption chamber 202 is connected to the first channel 103. The drainage net 203 is disposed inside the absorption chamber 202. The second channel 204 is disposed at the right end of the absorption chamber 202. The atomizer 205 is disposed at the bottom of the absorption liquid tank 201. The atomizer 205 is used to atomize the salicylic acid absorption liquid and spray it toward the absorption chamber 202.

[0029] The purification device 3 includes a purification box 301, an adsorption packing trough 302, and a plurality of air holes 303. The left end of the purification box 301 is connected to the second channel 204. The adsorption packing trough 302 is disposed in the purification box 301 and is filled with a purifying agent. The air holes 303 penetrate the adsorption packing trough 302 from left to right.

[0030] This utility model's salicylic acid exhaust gas drying and recovery device includes a heating device 1, an absorption device 2, and a purification device 3. The heating device 1 includes a heating chamber 101, an air inlet 102, a first channel 103, and several electric heating plates 104. The salicylic acid exhaust gas enters the heating chamber 101 through the air inlet 102 and is heated by the electric heating plates 104 to facilitate absorption by the salicylic acid absorbent. The absorption device 2 includes an absorbent tank 201, an absorption chamber 202, a drainage net 203, a second channel 204, and an atomizer 205. The atomizer 205 atomizes the salicylic acid absorbent in the absorbent tank 201 and sprays it toward the absorption chamber 202. The residual material in the exhaust gas enters the absorption chamber 202 through the first channel 103 and is fully absorbed by the salicylic acid absorbent for recycling. The purification device 3 includes a purification box 301, an adsorption packing tank 302, and several air holes 303. The remaining exhaust gas enters the purification box 301 through the second channel 204. The exhaust gas passes through the air holes 303 and is purified by the purifying agent in the adsorption packing tank 302, making it more environmentally friendly.

[0031] As a preferred embodiment of this utility model, it may also have the following additional technical features:

[0032] In this embodiment, several heating plates 104 are staggered and arranged in the heating box 101 to form an S-shaped channel 105. The exhaust gas is fully heated in the S-shaped channel 105 formed by the heating plates 104.

[0033] In this embodiment, a temperature sensor 106 and a solenoid valve 107 are sequentially arranged in the first channel 103. When the temperature sensor 106 detects that the temperature of the salicylic acid exhaust gas reaches a preset temperature, the solenoid valve 107 opens. The opening and closing of the first channel 103 is controlled by the temperature sensor 106 and the solenoid valve 107.

[0034] In this embodiment, the drainage net 203 has a V-shaped structure. The V-shaped drainage net 203 has a better drainage effect.

[0035] In this embodiment, the bottom of the absorbent tank 201 is connected to several conduits 206, which extend downwards to abut against the drainage net 203. The salicylic acid absorbent flows slowly through the conduits 206 onto the drainage net 203, and the exhaust gas is absorbed by the salicylic acid absorbent on the drainage net 203 to fully utilize the drainage effect of the drainage net 203.

[0036] In this embodiment, an atomizing nozzle 207 is provided at the bottom of the atomizer 205, and the atomizing nozzle 207 sprays mist toward the absorption chamber 202. The mist is sprayed into the absorption chamber 202 through the atomizing nozzle 207.

[0037] In this embodiment, fans 208 are provided on both sides of the drainage net 203. The fans 208 accelerate the flow of exhaust gas near the drainage net 203, thereby improving the absorption effect.

[0038] In this embodiment, the top of the absorption tank 201 is provided with an inlet 209, and the bottom of the absorption chamber 202 is provided with an outlet 210, which is connected to a recovery tank 211. Salicylic acid absorption solution is added through the inlet 209, and the salicylic acid absorption solution enters the recovery tank 211 through the outlet 210.

[0039] In this embodiment, a filter membrane 212 is provided in the second channel 204. The filter membrane 212 is used to block mist and allow gas to pass through. The filter membrane 212 blocks mist.

[0040] In this embodiment, the right end of the purification box 301 is connected to an air outlet 304. The completely treated exhaust gas is finally discharged through the air outlet 304, which is environmentally friendly and pollution-free.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A salicylic acid tail gas drying and recovery device, characterized in that, It includes a heating device (1), an absorption device (2), and a purification device (3); The heating device (1) includes a heating box (101), an air inlet (102), a first channel (103), and several electric heating plates (104). The air inlet (102) is located at the left end of the heating box (101), the first channel (103) is located at the right end of the heating box (101), and several electric heating plates (104) are vertically distributed inside the heating box (101). The electric heating plates (104) are used to heat the salicylic acid tail gas. The absorption device (2) includes an absorption liquid tank (201), an absorption chamber (202), a drainage net (203), a second channel (204), and an atomizer (205). The absorption liquid tank (201) contains salicylic acid absorption liquid. The absorption chamber (202) is located below the absorption liquid tank (201). The left end of the absorption chamber (202) is connected to the first channel (103). The drainage net (203) is disposed inside the absorption chamber (202). The second channel (204) is disposed at the right end of the absorption chamber (202). The atomizer (205) is disposed at the bottom of the absorption liquid tank (201). The atomizer (205) is used to atomize the salicylic acid absorption liquid and spray it toward the absorption chamber (202). The purification device (3) includes a purification box (301), an adsorption packing trough (302), and a plurality of air holes (303). The left end of the purification box (301) is connected to the second channel (204). The adsorption packing trough (302) is disposed in the purification box (301) and is filled with a purifying agent. The air holes (303) penetrate the adsorption packing trough (302) from left to right.

2. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, Several of the heating plates (104) are arranged alternately in the heating box (101) to form an S-shaped channel (105).

3. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, A temperature sensor (106) and a solenoid valve (107) are sequentially arranged in the first channel (103). When the temperature sensor (106) detects that the temperature of the salicylic acid tail gas reaches the preset temperature, the solenoid valve (107) opens.

4. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, The drainage net (203) has a V-shaped structure.

5. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, The bottom of the absorption tank (201) is connected to several conduits (206), which extend downward to abut against the drainage net (203).

6. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, The atomizer (205) is provided with an atomizing nozzle (207) at the bottom, and the atomizing nozzle (207) sprays towards the absorption chamber (202).

7. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, Fans (208) are provided on both sides of the drainage net (203).

8. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, The top of the absorption tank (201) is provided with an inlet (209), and the bottom of the absorption chamber (202) is provided with an outlet (210). The outlet (210) is connected to a recovery tank (211).

9. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, The second channel (204) is provided with a filter membrane (212), which is used to block mist and allow gas to pass through.

10. The salicylic acid tail gas drying and recovery device according to claim 1, characterized in that, The right end of the purification box (301) is connected to an air outlet (304).

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