CN215742871U

CN215742871U - Chemical reaction cabinet without VOC tail gas emission

Info

Publication number: CN215742871U
Application number: CN202122199092.9U
Authority: CN
Inventors: 张亮; 秦靖; 李昌龙; 何国金; 喻立煌
Original assignee: Ningbo Chemgoo Pharmaceutical Technology Innovation Ltd
Current assignee: Ningbo Chemgoo Pharmaceutical Technology Innovation Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-02-08
Anticipated expiration: 2031-09-10

Abstract

The utility model relates to the field of organic synthesis reaction devices, and discloses a chemical reaction cabinet without VOC tail gas emission, wherein a VOC treatment module and a chemical reaction module are arranged in the cabinet; the chemical reaction module comprises a chemical reactor and a VOC tail gas collecting port connected with the chemical reactor; the VOC treatment module comprises a VOC air inlet pipe, a VOC adsorption decomposition area, a clean gas outlet pipe, a condensation area and an air outlet pipe which are sequentially communicated; the VOC inlet pipe is communicated with the VOC tail gas collecting port; an ozone generation controller is arranged in the VOC air inlet pipe; an LED ultraviolet light source and a photocatalyst adsorbent are arranged in the VOC adsorption and decomposition area. The chemical reaction cabinet can remove VOC waste gas generated in chemical reaction in time and prevent the VOC waste gas from polluting the environment, the VOC treatment module can realize in-situ adsorption and degradation of VOC, the photocatalyst adsorbent can be continuously used without being periodically replaced, the use is convenient, and the hazardous waste of the photocatalyst adsorbent which is difficult to treat can not be generated.

Description

Chemical reaction cabinet without VOC tail gas emission

Technical Field

The utility model relates to the field of organic synthesis reaction devices, in particular to a chemical reaction cabinet without VOC tail gas emission.

Background

The World Health Organization (WHO) defines a large class of organic compounds having a boiling point range of 50 to 260 ℃, a saturated vapor pressure of more than 133.32Pa at room temperature, and existing in the air as vapor at room temperature as Volatile Organic Compounds (VOCs), which are mainly classified into 8 classes according to the structure: aromatic hydrocarbons, aliphatic hydrocarbons, halogenated hydrocarbons, alcohols, aldehydes, ketones, polyol compounds, ethers, phenols, epoxy compounds, esters, acids, amines, nitriles and others.

VOCs have many direct hazards to the human body, mainly including morbidity and genotoxicity and carcinogenicity caused by odor, sensory, mucosal irritation and other systemic toxicities. In addition, VOC is also O₃And PM 2.5, which can cause photochemical smog and O₃The concentration is increased, the times of haze weather are increased and other environmental problems indirectly affect the human health. The aliphatic hydrocarbon VOC substances such as ethylene, propylene and the like have low toxicity under common conditions, can be harmful to human bodies under high dosage concentration, but can cause great fire hazard to enterprise production due to the fact that the substances belong to flammable and explosive compounds. At present, the VOC becomes the 2 nd most widely distributed and various emissions except the particulate matter, and it is of great significance to research how to properly recover and treat the VOC and reduce the VOC pollution.

The chemical industry, including the production of fuels, coatings, pharmaceuticals, pesticides, explosives, organic synthesis, solvents, reagents, detergents, adhesives, and the like, is a significant source of VOCs. At present, the main treatment mode of VOC waste gas generated in the chemical reaction process is centralized harmless treatment after collection, and in the links of VOC waste gas collection, storage, transportation and the like, the condition of VOC leakage is easy to occur due to corrosion and abrasion of equipment, misoperation of operators and the like, so that environmental pollution is caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a chemical reaction cabinet without VOC tail gas emission. This chemical reaction cabinet can in time get rid of the VOC that generates among the chemical reaction process, avoids environmental pollution, and simultaneously, the photocatalyst adsorbent that wherein uses can normal position regeneration, does not need the periodic replacement, therefore it is more convenient to use, and can not produce the photocatalyst adsorbent danger that is difficult to handle useless.

The specific technical scheme of the utility model is as follows:

a chemical reaction cabinet without VOC tail gas emission comprises a shell and an inner cavity, wherein a VOC treatment module and a chemical reaction module are arranged in the inner cavity; the chemical reaction module comprises a chemical reactor and a VOC tail gas collecting port connected with the chemical reactor; the VOC treatment module comprises a VOC air inlet pipe, a VOC adsorption and decomposition area, a clean gas outlet pipe, a condensation area and an air outlet pipe which are sequentially communicated; the VOC gas inlet pipe is communicated with the VOC tail gas collecting port; an ozone generation controller is arranged in the VOC air inlet pipe; and an LED ultraviolet light source and a photocatalyst adsorbent are arranged in the VOC adsorption and decomposition area.

The working process of the chemical reaction cabinet is as follows: take place chemical reaction in the chemical reactor, the VOC gas that produces gets into the VOC intake pipe via VOC tail gas collection mouth, then gets into in the VOC adsorbs the decomposition district, is adsorbed by the photocatalyst adsorbent. Under the action of ultraviolet light, the adsorbed VOC substances are decomposed into clean gas by the photocatalyst. Under the normal condition, the adsorption performance and the photocatalyst decomposition performance of the device are in a balanced state, so that the in-situ degradation of VOC is realized, and the adsorbent does not need to be replaced. When the concentration of the VOC air inlet is too high and exceeds the decomposition capacity of the photocatalyst, an ozone generation controller is started to generate ozone, and the ozone can react with the VOC adsorbed in the photocatalyst adsorbent after entering a VOC adsorption and decomposition area to degrade the VOC into clean gas; the clean gas enters the condensation zone to be condensed and then is discharged through the air outlet pipe.

The chemical reaction cabinet can remove VOC waste gas generated in chemical reaction in time, and prevent the VOC waste gas from causing environmental pollution. In addition, the VOC treatment module can realize the in-situ adsorption and degradation of VOC, the photocatalyst adsorbent can be regenerated in situ and can be continuously used without being periodically replaced, so that the device is more convenient to use, the VOC treatment efficiency is higher, and the photocatalyst adsorbent which is difficult to treat is not generated to be dangerous and waste.

Preferably, the VOC treatment module is arranged above the chemical reaction module; the VOC treatment module and the chemical reaction module are separated by a partition plate; the VOC tail gas collecting port is arranged on the partition plate.

Preferably, the chemical reaction module further comprises a reactant feed tube extending through the housing; and one end of the reactant feeding pipe, which is positioned in the inner cavity, is connected with the chemical reactor.

Preferably, the VOC treatment module further comprises a fan; the clean gas outlet pipe is connected with the condensing area through a fan.

Preferably, a spiral condensation pipe is arranged in the condensation area.

Preferably, a temperature controller is arranged in the air outlet pipe.

Preferably, a temporary operation switch door is arranged on the housing outside the chemical reaction module.

Preferably, an adsorption and decomposition air inlet and an adsorption and decomposition air outlet are arranged in the VOC adsorption and decomposition area; one end of the VOC gas inlet pipe is connected with the VOC tail gas collecting port, and the other end of the VOC gas inlet pipe is connected with the adsorption and decomposition gas inlet; one end of the clean gas outlet pipe is connected with the condensation area, and the other end of the clean gas outlet pipe is connected with the adsorption and decomposition gas outlet.

Furthermore, a plurality of partition plates which are arranged in a staggered mode to form a circuitous channel are arranged in the VOC adsorption and decomposition area; the photocatalyst adsorbent is filled in the circuitous channel; the adsorption and decomposition air inlet and the adsorption and decomposition air outlet are respectively arranged at two ends of the circuitous channel; the LED ultraviolet light source is arranged on all or part of the partition plate.

In VOC adsorbs the decomposition area, adopt a plurality of division boards to form circuitous passageway, VOC gas lets in from circuitous passageway's one end, discharge from the other end behind the photocatalyst adsorbent who wherein fills, through this kind of structural design, can prolong the route that VOC gas passes through in VOC adsorbs the decomposition area, thereby increase the contact between VOC gas and the photocatalyst adsorbent in limited space, make full use of photocatalyst adsorbent catalytic degradation VOC gas in the VOC adsorption decomposition area, and improve VOC gaseous adsorption capacity, and then improve the gaseous purifying effect of VOC in the VOC adsorption decomposition area.

Preferably, an ozone and VOC concentration detector is arranged in the clean gas outlet pipe and close to the adsorption and decomposition gas outlet; an ozone destruction device is arranged in the clean gas outlet pipe and far away from the adsorption and decomposition gas outlet.

Ozone and VOC concentration detectors can perform the following functions: in the process of introducing VOC gas, when the ozone and VOC concentration detector detects a certain amount of VOC, the VOC adsorption is close to saturation, the concentration of the VOC gas inlet is too high and exceeds the decomposition capacity of a photocatalyst, and at the moment, the ozone generation controller is started to generate ozone for VOC oxidative degradation; in the VOC degradation process, when ozone concentration that ozone and VOC concentration detector detected risees, explain that the degradation of adsorbed VOC in the photocatalyst adsorbent is accomplished to, when ozone and VOC concentration detector detected a quantitative ozone, start ozone destruction device, make the clean gas outlet ozone-free discharge, thereby prevent ozone pollution.

Compared with the prior art, the utility model has the following advantages:

(1) the VOC gas generated in the chemical reaction can be removed in time, so that the environmental pollution caused by the VOC gas is prevented;

(2) the VOC treatment module can realize the in-situ adsorption and degradation of VOC, and the photocatalyst adsorbent can be continuously used without being periodically replaced, so that the device is more convenient to use, the VOC treatment efficiency is higher, and the photocatalyst adsorbent which is difficult to treat is not generated to be dangerous and useless.

Drawings

FIG. 1 is a schematic structural view (front view) of a VOC off-gas emission-free chemical reaction cabinet of the present invention;

fig. 2 is a schematic structural view (top view) of the VOC treatment module of fig. 1.

The reference signs are: chemical reaction module 1, VOC tail gas collection mouth 1.1, reactant inlet pipe 1.2, VOC processing module 2, VOC intake pipe 2.1, VOC adsorbs decomposition district 2.2, adsorb decomposition air inlet 2.2.1, adsorb decomposition gas outlet 2.2.2, LED ultraviolet light source 2.2.3, photocatalyst adsorbent 2.2.4, division board 2.2.5, clean gas outlet duct 2.3, ozone generation controller 2.4, clean gas outlet 2.5, ozone and VOC concentration detector 2.6, fan 2.7, condensation zone 2.8, condenser pipe 2.8.1, go out tuber pipe 2.9, purified gas outlet 2.10, ozone destruction device 2.11, dust interception net 2.12, anti ultraviolet net 2.13, temperature controller 2.14, baffle 4, interim operation switch door 6.

Detailed Description

The present invention will be further described with reference to the following examples. The devices, connections, and methods referred to in this disclosure are those known in the art, unless otherwise indicated.

Example 1

As shown in fig. 1, a chemical reaction cabinet without VOC tail gas emission includes a housing and an inner cavity. The inner cavity is internally provided with a VOC treatment module 2 and a chemical reaction module 1 which are separated by a partition plate 4; the VOC treatment module 2 is arranged above the chemical reaction module 1. And a VOC tail gas collecting port 1.1 is formed in the partition plate 4.

The chemical reaction module 1 comprises a chemical reactor, and the VOC tail gas collecting port 1.1 is communicated with the chemical reactor through a VOC tail gas collecting pipe; the chemical reactor is connected to a reactant feed 1.2 that extends through the housing. A temporary operation switch door 6 is arranged on the shell outside the chemical reaction module 1.

As shown in fig. 2, the VOC treatment module 2 includes a VOC inlet pipe 2.1, a VOC adsorption and decomposition area 2.2, a clean gas outlet pipe 2.3, a fan 2.7, a condensation area 2.8 and an air outlet pipe 2.9.

As shown in fig. 2, 4 separating plates 2.2.5 are arranged in the VOC adsorption-decomposition region 2.2 in a staggered arrangement to form a circuitous channel, wherein two separating plates 2.2.5 located at two sides and one separating plate 2.2.5 located in the middle are both provided with LED ultraviolet light sources 2.2.3, and the other separating plate 2.2.5 located in the middle is not provided with LED ultraviolet light sources 2.2.3. And an adsorption and decomposition air inlet 2.2.1 and an adsorption and decomposition air outlet 2.2.2 are respectively arranged at two ends of the roundabout channel. And the circuitous channel is filled with photocatalyst adsorbent 2.2.4.

As shown in fig. 2, one end of the VOC inlet pipe 2.1 is communicated with the VOC tail gas collecting port 1.1, and the other end is communicated with the adsorption and decomposition inlet 2.2.1. And a dust intercepting grid 2.12 is arranged in the VOC air inlet pipe 2.1 and close to the VOC tail gas collecting port 1.1. An ozone generation controller 2.4 is arranged in the VOC air inlet pipe 2.1 and close to the adsorption and decomposition air inlet 2.2.1.

As shown in fig. 2, one end of the clean gas outlet pipe 2.3 is communicated with the adsorption and decomposition gas outlet 2.2.2, and the other end is communicated with the gas inlet of the fan 2.7. And an ozone and VOC concentration detector 2.6 is arranged in the clean gas outlet pipe 2.3 close to the adsorption and decomposition gas outlet 2.2.2. An ozone destruction device 2.11 is arranged in the clean gas outlet pipe 2.3 and close to the air inlet of the fan 2.7. Two sides of the ozone destruction device 2.11 in the clean gas outlet pipe 2.3 are respectively provided with an anti-ultraviolet grid 2.13.

As shown in fig. 2, the air outlet of the fan 2.7 is communicated with the condensation area 2.8; one end of the air outlet pipe 2.9 is communicated with the condensing zone 2.8, and the other end is provided with a purified gas outlet 2.10. A spiral condensing pipe 2.8.1 is arranged in the condensing area 2.8. A temperature controller 2.14 is arranged in the air outlet pipe 2.9.

The working process of the VOC adsorption and in-situ decomposition device of this embodiment is as follows: take place chemical reaction in the chemical reactor, the VOC gas that produces gets into VOC intake pipe 2.1 via VOC tail gas collection mouth 1.1, then gets into in VOC adsorbs decomposition area 2.2, is adsorbed by photocatalyst adsorbent 2.2.4. Under the action of ultraviolet light, the adsorbed VOC substances are decomposed into clean gas by the photocatalyst. Under the normal condition, the adsorption performance and the photocatalyst decomposition performance of the device are in a balanced state, so that the in-situ degradation of VOC is realized, and the adsorbent does not need to be replaced. When the concentration of the VOC air inlet is too high and exceeds the decomposition capacity of the photocatalyst, the VOC adsorption amount of the adsorbent can be continuously increased, and when a certain amount of VOC is detected by the ozone and VOC concentration detector 2.6, the VOC adsorption is close to saturation; then starting an ozone generation controller 2.4 to generate ozone, wherein the ozone can react with the VOC absorbed in the photocatalyst adsorbent 2.2.4 after entering the VOC absorption decomposition area 2.2, so as to degrade the VOC into clean gas; clean gas enters the clean gas outlet pipe 2.3, when the ozone and VOC concentration detector 2.6 detects a certain amount of ozone, the ozone destruction device is started, so that no ozone is discharged from the clean gas outlet, and the ozone pollution is prevented; when the concentration of ozone detected by the ozone and VOC concentration detector 2.6 is increased, the degradation of the VOC adsorbed in the photocatalyst adsorbent 2.2.4 is completed; the clean gas entering the clean gas outlet pipe 2.3 enters the condensation area 2.8 to be condensed under the action of the fan 2.7, and then is discharged from the purified gas outlet 2.10 through the air outlet pipe 2.9.

Through the mode, the VOC gas generated in the chemical reaction can be removed in time, and the environmental pollution caused by the VOC gas is prevented. In addition, VOC handles the module and can realize VOC's normal position absorption and degradation, and the photocatalyst adsorbent can the normal position regeneration, and sustainable use and need not regularly change, therefore the use of device is more convenient, and the VOC treatment effeciency is higher, and can not produce the photocatalyst adsorbent danger that is difficult to handle useless.

The structures of the chemical reactor, the VOC tail gas collecting pipe and the reactant feeding pipe 1.2 in the chemical reaction module 1 and the connection relationship among the structures are all conventional structures in the field, and are not the technical points of the utility model.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A chemical reaction cabinet without VOC tail gas emission comprises a shell and an inner cavity, and is characterized in that a VOC treatment module (2) and a chemical reaction module (1) are arranged in the inner cavity; the chemical reaction module (1) comprises a chemical reactor and a VOC tail gas collecting port (1.1) connected with the chemical reactor; the VOC treatment module (2) comprises a VOC air inlet pipe (2.1), a VOC adsorption decomposition area (2.2), a clean gas outlet pipe (2.3), a condensation area (2.8) and an air outlet pipe (2.9) which are sequentially communicated; the VOC gas inlet pipe (2.1) is communicated with the VOC tail gas collecting port (1.1); an ozone generation controller (2.4) is arranged in the VOC air inlet pipe (2.1); an LED ultraviolet light source (2.2.3) and a photocatalyst adsorbent (2.2.4) are arranged in the VOC adsorption and decomposition area (2.2).

2. The VOC off-gas emission-free chemical reaction cabinet according to claim 1, wherein the VOC treatment module (2) is arranged above the chemical reaction module (1); the VOC treatment module (2) is separated from the chemical reaction module by a partition plate (4); the VOC tail gas collecting port (1.1) is arranged on the partition board (4).

3. A VOC tail gas emission free chemical reaction cabinet according to claim 1, wherein the chemical reaction module (1) further comprises a reactant feed pipe (1.2) penetrating the housing; the end of the reactant feeding pipe (1.2) positioned in the inner cavity is connected with the chemical reactor.

4. A VOC tail gas emission-free chemical reaction cabinet according to claim 1, wherein the VOC treatment module (2) further comprises a fan (2.7); the clean gas outlet pipe (2.3) is connected with the condensing area (2.8) through a fan (2.7).

5. A VOC tail gas emission-free chemical reaction cabinet according to claim 1, characterized in that a spiral-shaped condensation pipe (2.8.1) is arranged in the condensation zone (2.8).

6. A VOC tail gas emission-free chemical reaction cabinet according to claim 1, characterized in that a temperature controller (2.14) is arranged in the air outlet pipe (2.9).

7. A VOC tail gas emission-free chemical reaction cabinet according to claim 1, wherein a temporary operation switch door (6) is provided on the housing outside the chemical reaction module (1).

8. A chemical reaction cabinet without VOC tail gas emission according to claim 1, characterized in that the VOC adsorption-decomposition area (2.2) is provided with an adsorption-decomposition gas inlet (2.2.1) and an adsorption-decomposition gas outlet (2.2.2); one end of the VOC gas inlet pipe (2.1) is connected with the VOC tail gas collecting port (1.1), and the other end of the VOC gas inlet pipe is connected with the adsorption and decomposition gas inlet (2.2.1); one end of the clean gas outlet pipe (2.3) is connected with the condensing area (2.8), and the other end is connected with the adsorption decomposition gas outlet (2.2.2).

9. A VOC tail gas emission-free chemical reaction cabinet according to claim 8, wherein the VOC absorption-decomposition area (2.2) is provided with a plurality of partition plates (2.2.5) which are arranged in a staggered manner to form a circuitous channel; the photocatalyst adsorbent (2.2.4) is filled in the circuitous channel; the adsorption and decomposition gas inlet (2.2.1) and the adsorption and decomposition gas outlet (2.2.2) are respectively arranged at two ends of the circuitous channel; the LED ultraviolet light source (2.2.3) is arranged on all or part of the separation plate (2.2.5).

10. The VOC off-gas emission-free chemical reaction cabinet according to claim 8, wherein an ozone and VOC concentration detector (2.6) is arranged in the clean gas outlet pipe (2.3) near the adsorption decomposition gas outlet (2.2.2); an ozone destruction device (2.11) is arranged in the clean gas outlet pipe (2.3) far away from the adsorption decomposition gas outlet (2.2.2).