Chemical gas collecting and treating device

Abstract

The utility model discloses a chemical gas collection and treatment device, which relates to the field of gas treatment equipment and comprises a pretreatment bin, and clean water is arranged in the pretreatment bin and used for dedusting and cooling gas; desiccant particles are arranged in the dehumidification bin, and the dehumidification bin is used for dehumidifying the gas; an alkaline solution is arranged in the chemical absorption bin, and the chemical absorption bin is used for carrying out chemical reaction treatment on the acid gas; an oxidizing agent solution is arranged in the oxidation treatment bin, and the oxidation treatment bin is used for carrying out oxidation treatment on the oxidizable gas; adsorbent particles are arranged in the tail gas purification bin, and the tail gas purification bin is used for carrying out adsorption treatment on trace pollutants in the gas; the device is provided with a plurality of linked bin bodies, each bin body can realize corresponding gas treatment, and the plurality of bin bodies can selectively treat gas through the matching of the connecting pipes, the gas guide pipes and the three-way valves; the chemical gas containing various components can be collected and treated through one set of device, so that the cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of gas processing equipment, and in particular to a chemical gas collection and processing device. Background Technology

[0002] Pharmaceutical intermediates refer to chemical raw materials or products used in the synthesis process of pharmaceuticals. They are important raw materials in the manufacturing process, and the quality of pharmaceutical intermediates directly determines the quality and efficacy of the final drug. With the increasing added value and technological complexity of pharmaceutical intermediates in my country, they have become a crucial link in the pharmaceutical industry chain.

[0003] Various chemical gases are generated during the production of pharmaceutical intermediates. These gases may contain components such as NH3, HCl, HBr, HI, H2S, Cl2, SO2, SO3, and CO. They need to be treated according to their specific components and in a specific order before being discharged. Since the chemical gases generated from the production of different pharmaceutical intermediates are also different, it would be very costly to set up a special gas collection and treatment device for each type of pharmaceutical intermediate. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a chemical gas collection and treatment device that can collect and treat chemical gases containing multiple components using a single device, thereby saving costs.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a chemical gas collection and treatment device, comprising:

[0006] The pretreatment chamber contains clean water for dust removal and cooling of the gas.

[0007] The dehumidification chamber contains desiccant granules for dehumidifying the gas.

[0008] The chemical absorption chamber contains an alkaline solution for chemically reacting and treating acidic gases.

[0009] The oxidation treatment chamber contains an oxidant solution for oxidizing oxidizable gases.

[0010] The exhaust gas purification chamber contains adsorbent particles for adsorbing and treating trace pollutants in the gas.

[0011] It also includes an intake pipe, a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe, an exhaust pipe, a first air guide pipe, a second air guide pipe, a third air guide pipe, and a three-way valve;

[0012] One end of the air inlet pipe is located outside the pretreatment chamber, and the other end is below the liquid surface inside the pretreatment chamber; one end of the first connecting pipe is located above the liquid surface inside the pretreatment chamber, and the other end is above the desiccant particles inside the dehumidification chamber; one end of the second connecting pipe is located below the desiccant particles inside the dehumidification chamber, and the other end is below the liquid surface inside the chemical absorption chamber; one end of the third connecting pipe is located above the liquid surface inside the chemical absorption chamber, and the other end is below the solution inside the oxidation treatment chamber; one end of the fourth connecting pipe is located above the solution inside the oxidation treatment chamber, and the other end is above the adsorbent particles inside the exhaust gas purification chamber; one end of the exhaust pipe is located below the adsorbent particles inside the exhaust gas purification chamber, and the other end is outside the exhaust gas purification chamber; the two ends of the first air guide pipe are respectively connected to the first connecting pipe and the second connecting pipe via three-way valves; the two ends of the second air guide pipe are respectively connected to the second connecting pipe and the third connecting pipe via three-way valves; the two ends of the third air guide pipe are respectively connected to the third connecting pipe and the fourth connecting pipe via three-way valves.

[0013] The beneficial effects of this utility model are: the chemical gas collection and treatment device is equipped with multiple interconnected chambers, each of which can process a corresponding gas. The multiple chambers can selectively process the gas through the cooperation of connecting pipes, gas guide pipes and three-way valves; a single device can collect and process chemical gases containing multiple components, saving costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structural principle of this utility model.

[0016] The diagram shows: 1. Pretreatment chamber, 2. Dehumidification chamber, 3. Chemical absorption chamber, 4. Oxidation treatment chamber, 5. Exhaust gas purification chamber, 6. Inlet pipe, 7. First connecting pipe, 8. Second connecting pipe, 9. Third connecting pipe, 10. Fourth connecting pipe, 11. Exhaust pipe, 12. First air guide pipe, 13. Second air guide pipe, 14. Third air guide pipe, 15. Three-way valve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0018] Reference Figure 1 This embodiment provides a chemical gas collection and treatment device, including:

[0019] Pretreatment chamber 1 is equipped with clean water. Gas is passed through the water for dust removal and cooling; it also absorbs gases that are highly soluble in water, such as NH3, HCl, HBr, and HI.

[0020] The dehumidification chamber 2 contains desiccant particles to dehumidify the gas, reduce its humidity, and prevent it from affecting subsequent absorption efficiency. In this embodiment, the desiccant particles are preferably alumina particles, which have the characteristics of large water absorption and fast drying speed, and will not react with the components in the gas generated during the production of pharmaceutical intermediates. There are a large number of gaps between the granular desiccant particles to ensure that the gas can pass through.

[0021] The chemical absorption chamber 3 contains an alkaline solution for chemically treating acidic gases. In this embodiment, the alkaline solution is preferably NaOH or Ca(OH)₂ solution, which absorbs acidic gases such as CO₂, H₂S, Cl₂, SO₂, SO₃, and NO₂. It can also react with phenolic gases (such as phenol and naphthol) to form phenolates.

[0022] Oxidation chamber 4 contains an oxidant solution for oxidizing oxidizable gases. In this embodiment, the oxidant solution is preferably H₂O₂ or NaClO solution, which absorbs oxidizable gases such as CO and sulfides.

[0023] The exhaust gas purification chamber 5 contains adsorbent particles for adsorbing and treating trace pollutants in the gas. In this embodiment, the adsorbent particles are preferably activated carbon particles to adsorb the remaining trace pollutants in the gas. There are a large number of gaps between the granular adsorbent particles to ensure that the gas can pass through.

[0024] It also includes an intake pipe 6, a first connecting pipe 7, a second connecting pipe 8, a third connecting pipe 9, a fourth connecting pipe 10, an exhaust pipe 11, a first air guide pipe 12, a second air guide pipe 13, a third air guide pipe 14, and a three-way valve 15.

[0025] One end of the intake pipe 6 is located outside the pretreatment chamber 1, and the other end is located below the liquid surface inside the pretreatment chamber 1; one end of the first connecting pipe 7 is located above the liquid surface inside the pretreatment chamber 1, and the other end is located above the desiccant particles inside the dehumidification chamber 2; one end of the second connecting pipe 8 is located below the desiccant particles inside the dehumidification chamber 2, and the other end is located below the liquid surface inside the chemical absorption chamber 3; one end of the third connecting pipe 9 is located above the liquid surface inside the chemical absorption chamber 3, and the other end is located below the solution inside the oxidation treatment chamber 4; one end of the fourth connecting pipe 10 is located above the solution inside the oxidation treatment chamber 4, and the other end is located above the adsorbent particles inside the exhaust gas purification chamber 5; one end of the exhaust pipe 11 is located below the adsorbent particles inside the exhaust gas purification chamber 5, and the other end is located outside the exhaust gas purification chamber 5.

[0026] The two ends of the first air guide pipe 12 are respectively connected to the portions of the first connecting pipe 7 and the second connecting pipe 8 located above the dehumidification chamber 2 via three-way valves 15; the two ends of the second air guide pipe 13 are respectively connected to the portions of the second connecting pipe 8 and the third connecting pipe 9 located above the chemical absorption chamber 3 via three-way valves 15; the two ends of the third air guide pipe 14 are respectively connected to the portions of the third connecting pipe 9 and the fourth connecting pipe 10 located above the oxidation treatment chamber 4 via three-way valves 15.

[0027] The working principle of this device is as follows: When gas requires full-process treatment, refer to... Figure 1 By setting the direction of the three-way valve 15, the two ends of the first gas guide pipe 12 are respectively sealed to the first connecting pipe 7 and the second connecting pipe 8, the two ends of the second gas guide pipe 13 are respectively sealed to the second connecting pipe 8 and the third connecting pipe 9, and the two ends of the third gas guide pipe 14 are respectively sealed to the third connecting pipe 9 and the fourth connecting pipe 10. In this way, the gas first enters the pretreatment chamber 1 through the inlet pipe 6 for dust removal and cooling; at the same time, it can absorb gases that are highly soluble in water. Then, it enters the dehumidification chamber 2 through the first connecting pipe 7 for dehumidification to avoid affecting the subsequent absorption efficiency. Then, it enters the chemical absorption chamber 3 through the second connecting pipe 8 to absorb and treat acidic gases and phenolic gases. Then, it enters the oxidation treatment chamber 4 through the third connecting pipe 9 to treat oxidizable gases. Then, it enters the exhaust gas purification chamber 5 through the fourth connecting pipe 10 to adsorb and treat trace pollutants in the gas, and finally, it is discharged from the exhaust pipe 11.

[0028] Alternatively, the direction of the three-way valve 15 can be changed according to the gas content, allowing the gas to bypass a certain chamber and proceed directly to the next process operation. For example, if the gas does not contain acidic gas, the direction of the three-way valve 15 can be set so that the two ends of the second gas guide pipe 13 are connected to the second connecting pipe 8 and the third connecting pipe 9 respectively. The second connecting pipe 8 and the third connecting pipe 9 are sealed from the chemical absorption chamber 3. In this way, the gas in the second connecting pipe 8 will not enter the chemical absorption chamber 3, but will enter the second gas guide pipe 13 and then enter the third connecting pipe 9.

[0029] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A chemical gas collection and treatment device, characterized in that, include: The pretreatment chamber contains clean water for dust removal and cooling of the gas. The dehumidification chamber contains desiccant granules for dehumidifying the gas. The chemical absorption chamber contains an alkaline solution for chemically reacting and treating acidic gases. The oxidation treatment chamber contains an oxidant solution for oxidizing oxidizable gases. The exhaust gas purification chamber contains adsorbent particles for adsorbing and treating trace pollutants in the gas. It also includes an air inlet pipe, a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe, an exhaust pipe, a first air guide pipe, a second air guide pipe, a third air guide pipe, and a three-way valve; one end of the air inlet pipe is located outside the pretreatment chamber, and the other end is located below the liquid level inside the pretreatment chamber; one end of the first connecting pipe is located above the liquid level inside the pretreatment chamber, and the other end is located above the desiccant particles inside the dehumidification chamber; One end of the second connecting pipe is located below the desiccant particles in the dehumidification chamber, and the other end is located below the liquid surface in the chemical absorption chamber; one end of the third connecting pipe is located above the liquid surface in the chemical absorption chamber, and the other end is located below the solution in the oxidation treatment chamber. One end of the fourth connecting pipe is located above the solution in the oxidation treatment chamber, and the other end is located above the adsorbent particles in the exhaust gas purification chamber; one end of the exhaust pipe is located below the adsorbent particles in the exhaust gas purification chamber, and the other end is located outside the exhaust gas purification chamber; the two ends of the first air guide pipe are respectively connected to the first connecting pipe and the second connecting pipe through a three-way valve; the two ends of the second air guide pipe are respectively connected to the second connecting pipe and the third connecting pipe through a three-way valve; the two ends of the third air guide pipe are respectively connected to the third connecting pipe and the fourth connecting pipe through a three-way valve.

Images