CN209978068U

CN209978068U - Waste gas treatment device

Info

Publication number: CN209978068U
Application number: CN201920841325.0U
Authority: CN
Inventors: 杨卫
Original assignee: Guangdong Baisong Environmental Protection Technology Co Ltd
Current assignee: Guangdong Baisong Environmental Protection Technology Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-01-21
Anticipated expiration: 2029-06-04

Abstract

An exhaust gas treatment device comprises a catalytic bed, wherein an air inlet channel and an air outlet channel are connected with the catalytic bed, the catalytic bed is characterized in that a first heat exchanger, a second heat exchanger, a heater and a first temperature sensor are sequentially arranged on the air inlet channel according to an air inlet sequence, and a second heat exchanger, a first cooling device and a first exhaust fan are sequentially arranged on the air outlet channel according to an air outlet sequence; the air outlet channel is provided with an additional air outlet branch and a second temperature sensor between the first heat exchanger and the second heat exchanger, and the air outlet branch is sequentially provided with a second cooling device and a second exhaust fan. The device has the advantages of heat recycling, safe operation, high efficiency and low cost.

Description

Waste gas treatment device

Technical Field

The utility model relates to an energy saving and emission reduction technical field, in particular to exhaust treatment device.

Background

VOC refers to volatile organic substances, including alkanes, alkenes, aromatics, aldehydes or ketones, etc., which have special odor irritancy and are harmful to human bodies and the environment.

The printing industry generates large amounts of VOC-containing gases during printing, which need to be purified in order to be released into the environment.

The main technology for treating waste gas in the prior art is incineration purification technology, and the waste gas is incinerated by using catalyst catalysis, however, in most waste gas treatment devices, the service life and the performance of the catalyst are influenced when the catalyst is in a high-temperature working state for a long time; or a large amount of heat generated by incineration is directly discharged into the environment, thus causing resource waste. This is caused by the lack of control over the overall temperature of the device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a waste gas treatment device aims at solving above-mentioned problem.

An exhaust gas treatment device comprises a catalytic bed, wherein an air inlet channel and an air outlet channel are connected with the catalytic bed, the catalytic bed is characterized in that a first heat exchanger, a second heat exchanger, a heater and a first temperature sensor are sequentially arranged on the air inlet channel according to an air inlet sequence, and a second heat exchanger, a first cooling device and a first exhaust fan are sequentially arranged on the air outlet channel according to an air outlet sequence; the air outlet channel is provided with an additional air outlet branch and a second temperature sensor between the first heat exchanger and the second heat exchanger, and the air outlet branch is sequentially provided with a second cooling device and a second exhaust fan.

Preferably, a filter screen is further arranged in the air inlet channel.

Preferably, the inlet channel and the outlet channel are not communicated in the second heat exchanger and the first heat exchanger.

Preferably, a safety valve is arranged on the catalytic bed.

Preferably, a control valve is further arranged in the air outlet branch.

Preferably, the cooling mode of the first cooling device and the second cooling device is cold water cooling.

The utility model provides a pair of exhaust treatment device compares with prior art, through setting up first temperature sensor with second temperature sensor carries out the temperature monitoring to the device, the branch road of giving vent to anger is used for alleviating device pressure and temperature, ensures device safe operation. And the first heat exchanger and the second heat exchanger are arranged, so that heat generated by reaction is recycled, and energy consumption is saved. The utility model discloses the operation is safe, high-efficient and with low costs.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is an overall configuration view of an exhaust gas treatment device;

wherein, the reference numbers:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Air inlet channel	17	First exhaust fan
11	Air outlet channel	18	No. two cooling device
				111	Air outlet branch	19	No. two exhaust fan
12	First heat exchanger	20	Filter screen
				13	No. two heat exchanger	21	Safety valve
14	Heating device	22	Control valve
				15	Catalytic bed	23	First temperature sensor
16	First cooling device	24	Second temperature sensor

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An exhaust gas treatment device comprises a catalytic bed 15, wherein an air inlet channel 10 and an air outlet channel 11 are connected with the catalytic bed 15, and the exhaust gas treatment device is characterized in that the air inlet channel 10 is sequentially provided with a first heat exchanger 12, a second heat exchanger 13, a heater 14 and a first temperature sensor 23 according to an air inlet sequence, and the air outlet channel 11 is sequentially provided with the second heat exchanger 13, the first heat exchanger 12, a first cooling device 16 and a first exhaust fan 17 according to an air outlet sequence; the air outlet channel 11 is provided with an additional air outlet branch 111 and a second temperature sensor 24 between the first heat exchanger 12 and the second heat exchanger 13, and the air outlet branch 111 is sequentially provided with a second cooling device 18 and a second exhaust fan 19.

When the exhaust gas treatment device is used for treating VOC, as shown in fig. 1, fresh air enters the catalytic bed 15 from the inlet channel 10, and gas in the catalytic bed 15 is discharged from the outlet channel 11. When fresh air enters, the fresh air firstly passes through the first heat exchanger 12, the first heat exchanger 12 preliminarily preheats the fresh air, the preheated fresh air enters the second heat exchanger 13, the second heat exchanger 13 preheats the fresh air again, multi-step heating is achieved, the purpose is that the gas temperature can be well regulated and controlled, and the gas temperature in the second heat exchanger 13 is higher than that in the first heat exchanger 12; the catalytic reaction takes place in the catalytic bed 15 to achieve the purpose of purifying VOC. The catalytic reaction is catalytic combustion, the purification efficiency of VOC is high, a large amount of heat is released by the reaction, and the gas generated after the reaction carries heat to enter the second heat exchanger 13 and the first heat exchanger 12 through the gas outlet channel 11 and is used for preheating the newly entered gas in the gas inlet channel 10 before the reaction. The heat generated by the reaction is utilized to preheat the gas, so that the energy consumption of the device can be greatly reduced.

After preheating the gas in the inlet channel 10, it needs to be heated to the light-off temperature before entering the catalytic bed 15, which is performed in the heater 14. Generally, the heat released by the catalytic reaction is enough to preheat the fresh inlet gas in the second heat exchanger 13 to the temperature above the ignition temperature, and the temperature of the gas in the catalytic bed 15 involved in the catalytic reaction cannot be too high for a long time, which affects the performance of the catalyst, so that the reaction temperature needs to be controlled. Said first temperature sensor 23 and said second temperature sensor 24 are arranged in said inlet channel 10 and in said outlet channel 11, respectively, for testing the inlet gas temperature and the outlet gas temperature of said catalytic bed 15. And measures are taken to adjust the temperature of the waste gas treatment device, specifically, the air outlet branch 111 is added in the air outlet channel 11, the second exhaust fan 19 stops working under normal conditions, and the air outlet branch 111 is not obvious in the waste gas treatment device. When the temperatures detected by the first sensor 23 and the second sensor 24 exceed a preset critical temperature, the second exhaust fan 19 is started, and the outlet branch 111 accelerates the pumping of the high-temperature and high-pressure gas in the catalytic bed 15 and the inlet channel 10, so as to reduce the temperature. And therefore, the heat transfer effect of the air outlet channel 11 in the first heat exchanger 12 and the second heat exchanger 13 on the air inlet channel 10 is reduced, and the overall temperature of the exhaust gas treatment device is reduced.

The first cooling device 16 and the second cooling device 18 are used for cooling high-temperature gas before being discharged out of the device and recovering heat energy. The heater 14 may be heated by electricity or by a burner, and is not limited thereto.

Further, a filter screen 20 is disposed in the air intake passage 10. When the new trend gets into during inlet air duct, can pass through at first filter screen 20 avoids during new trend carries dust, granule to enter into the device pile up among the exhaust treatment device, influence working property and life-span

Further, the inlet passage 10 and the outlet passage 11 do not communicate in the heat exchanger No. two 13 and the heat exchanger No. one 12. The first heat exchanger 12 and the second heat exchanger 13 have two closely attached and mutually independent channels, are easy to conduct heat, are respectively connected with the air inlet channel 10 and the air outlet channel 11, and can transfer heat from a channel with high temperature to a channel with low temperature.

Further, a safety valve 21 is arranged on the catalytic bed 15. The catalytic reaction of flameless combustion takes place in said catalytic bed 15, giving off a lot of heat and a lot of gases, mainly carbon dioxide and water vapor, causing the gas pressure in said catalytic bed 15 to rise. In order to ensure the safety of the catalytic process, said safety valve 21 is provided, and when the inside of said catalytic bed 15 is over-pressurized, said safety valve 21 is opened to release part of the gas to achieve the pressure reduction effect.

Further, a control valve 22 is disposed in the air outlet branch 111. The gas flow passing through the gas outlet branch 111 in unit time is controlled according to the opening degree of the outlet control valve 22, so that the gas flow in the gas outlet channel 11 is adjusted, and the preheating effects of the second heat exchanger 13 and the first heat exchanger 12 are further controlled.

Further, the cooling manner of the first cooling device 16 and the second cooling device 18 is cold water cooling. The first cooling device 16 and the second cooling device 18 can be a cooling tower or a water chiller, the specific heat capacity of water is high, the heat conduction effect is good, high-temperature gas can be cooled quickly, heat can be absorbed sufficiently, and water vapor in the gas can be collected to achieve resource recovery.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. An exhaust gas treatment device comprises a catalytic bed, wherein an air inlet channel and an air outlet channel are connected with the catalytic bed, the catalytic bed is characterized in that a first heat exchanger, a second heat exchanger, a heater and a first temperature sensor are sequentially arranged on the air inlet channel according to an air inlet sequence, and a second heat exchanger, a first cooling device and a first exhaust fan are sequentially arranged on the air outlet channel according to an air outlet sequence; the air outlet channel is provided with an additional air outlet branch and a second temperature sensor between the first heat exchanger and the second heat exchanger, and the air outlet branch is sequentially provided with a second cooling device and a second exhaust fan.

2. An exhaust gas treatment device according to claim 1, wherein a filter screen is further provided in the intake passage.

3. An exhaust gas treatment device according to claim 1, wherein the inlet channel and the outlet channel do not communicate between the heat exchanger number two and the heat exchanger number one.

4. An exhaust gas treatment device according to claim 1, wherein a safety valve is provided in said catalytic bed.

5. An exhaust gas treatment device according to claim 1, wherein a control valve is further provided in the outlet branch.

6. The exhaust gas treatment device according to claim 1, wherein the first cooling device and the second cooling device are cooled by cold water.