Volatile organic waste gas purification treatment device

Abstract

The utility model discloses a volatile organic waste gas purification treatment device which comprises a VOCs treatment system, a waste gas inlet of the VOCs treatment system is respectively communicated with a semi-coke belt corridor waste gas pipeline and a scraper upper waste gas pipeline, and first centrifugal fans are arranged on the semi-coke belt corridor waste gas pipeline and the scraper upper waste gas pipeline. Branch pipelines are arranged on the semi-coke belt corridor waste gas pipeline and the scraper machine upper part waste gas pipeline and are communicated with gas inlet pipelines of the SJ-IV type gas retort; and a first butterfly valve and a second centrifugal fan are arranged on each gas inlet pipeline. After the generated volatile organic waste gas is sent back to the gas retort through the pipeline, organic components in the waste gas serve as fuel to be combusted again, the total amount of coal gas for operation of the gas retort is saved, the waste gas treatment cost and the content of organic matter in the waste gas are reduced while energy consumption is reduced, the operation load of a VOCs treatment system is reduced, and the energy consumption is reduced. And the service life of the VOCs treatment system is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a volatile organic waste gas purification and treatment device. Background Technology

[0002] The carbonization workshop generates a large amount of waste gas during operation. The waste gas from the semi-coke conveyor belt corridor and the upper part of the carbonization furnace scraper mainly originates from the SJ-IV type carbonization furnace. During the carbonization process, the semi-coke from the low-temperature carbonization of oil shale in the SJ-IV type carbonization furnace moves downwards, passes through the water-cooled jacket coke discharge box at the bottom of the furnace, and enters the water seal tank. After the high-temperature oil shale semi-coke is extinguished in the water in the water seal tank, steam is generated. The steam contains organic gases, acidic gases, ammonia, and other waste gases. Because this waste gas is a mixed fluid containing three-phase pollutants (vapor, liquid, and solid), it is characterized by high temperature, high humidity, oil content, and complex composition, so timely treatment of the waste gas is necessary.

[0003] Currently, the method for treating distillation waste gas involves collecting it all within the plant area and then treating it through a VOCs waste gas treatment facility. This facility employs a combined treatment process centered on a PP absorption tower scrubber, dry filter, oil and gas recovery unit, adsorption purification unit, and integrated environmental protection unit, with a processing capacity of 60,000 m³ / h. However, due to the large amount of waste gas generated during the operation of the distillation workshop, even with continuous day and night processing, volatile waste gas still overflows. This results in a high processing load on the VOCs waste gas treatment equipment, a short service life, increased equipment maintenance costs, and environmental pollution. Utility Model Content

[0004] This invention provides a volatile organic waste gas purification and treatment device, which aims to solve the problems of high load, short service life and high operating cost when existing VOCs waste gas treatment equipment treats dry distillation waste gas.

[0005] To achieve its purpose, this utility model adopts the following technical solution:

[0006] A volatile organic compound (VOC) waste gas purification and treatment device includes a VOCs treatment system and an SJ-IV type dry distillation furnace. The waste gas inlet of the VOCs treatment system is connected to the waste gas pipeline of the semi-coke conveyor belt corridor and the waste gas pipeline above the scraper conveyor, respectively. A first centrifugal fan is installed on both the waste gas pipeline of the semi-coke conveyor belt corridor and the waste gas pipeline above the scraper conveyor. Branch pipelines are provided on the waste gas pipeline of the semi-coke conveyor belt corridor and the waste gas pipeline above the scraper conveyor, which are connected to the gas inlet pipeline of the SJ-IV type dry distillation furnace. A first butterfly valve and a second centrifugal fan are installed on each of the waste gas pipelines of the semi-coke conveyor belt corridor and the waste gas pipeline above the scraper conveyor, respectively, on the side near the VOCs treatment system. A pressure gauge and a flow meter are respectively installed at the second butterfly valve.

[0007] Furthermore, the gas inlet pipe is a galvanized iron pipe.

[0008] Furthermore, both the first and second butterfly valves are stainless steel butterfly valves.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. The volatile organic compound (VOC) waste gas purification and treatment device provided by this utility model introduces the generated VOC waste gas into an SJ-IV type dry distillation furnace for combustion, thereby reducing the amount of waste gas emissions. The total amount of waste gas emissions can be reduced by approximately 13,000 m³ per hour. 3 / h, with an annual reduction of approximately 102.96 million m³ of exhaust gas. 3 The generated volatile organic compounds (VOCs) are returned to the distillation furnace via pipeline, where the organic components are reused as fuel. This saves on the total amount of gas used in the distillation furnace, reducing energy consumption, waste gas treatment costs, and the organic content in the waste gas. It also lightens the operating load of the VOCs treatment system and extends its service life. After the system upgrade, the total hourly waste gas volume of the VOCs system decreased from 60,000 m³ / h. 3 / h reduced to 47000m 3 / h, which reduced the operating load of the VOCs treatment system by 22%, and extended the service life of the activated carbon in the VOCs system from once every two months to once every quarter.

[0011] 2. The volatile organic waste gas purification and treatment device provided by this utility model effectively removes and purifies harmful gases after the volatile organic waste gas is recycled and burned, thereby improving the air quality in the factory area and the working environment. The overall process is simple, green and environmentally friendly. By introducing the organic waste gas into the dry distillation furnace for combustion, it provides a new approach to converting the internal energy of the organic waste gas into heat energy, turning the organic waste gas into a fuel that provides heat energy, and can be widely promoted and used. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the volatile organic waste gas purification and treatment device of this utility model;

[0013] In the diagram: 1-VOCs treatment system; 2-Semi-coke conveyor belt corridor exhaust gas pipeline; 3-Upper exhaust gas pipeline of scraper conveyor; 4-Second butterfly valve; 5-Pressure gauge; 6-Flow meter; 7-SJ-IV type dry distillation furnace; 8-Gas inlet pipeline; 9-First butterfly valve; 10-First centrifugal fan; 11-Second centrifugal fan. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] like Figure 1 As shown, this utility model is a volatile organic compound (VOC) waste gas purification and treatment device, including a VOCs treatment system 1 and an SJ-IV type dry distillation furnace 7. The waste gas inlet of the VOCs treatment system 1 is connected to the waste gas pipe 2 of the semi-coke conveyor belt corridor and the waste gas pipe 3 above the scraper conveyor. Both the waste gas pipe 2 of the semi-coke conveyor belt corridor and the waste gas pipe 3 above the scraper conveyor are equipped with a first centrifugal fan 10. Branch pipes on the waste gas pipe 2 of the semi-coke conveyor belt corridor and the waste gas pipe 3 above the scraper conveyor are connected to the gas inlet pipe 8 of the SJ-IV type dry distillation furnace 7. The gas inlet pipe 8 is a galvanized iron pipe, and each gas inlet pipe 8 is equipped with a first butterfly valve 9 and a second centrifugal fan 11. A second butterfly valve 4 is installed on the side of the waste gas pipe 2 of the semi-coke conveyor belt corridor and the waste gas pipe 3 above the scraper conveyor near the VOCs treatment system 1. A pressure gauge 5 and a flow meter 6 are respectively installed at the second butterfly valve 4. Both the first butterfly valve 9 and the second butterfly valve 4 are stainless steel butterfly valves.

[0016] Because volatile organic waste gas is generated during the low-temperature dry distillation process of the dry distillation furnace, this gas is collected through pipelines and then treated by the VOCs treatment system 1 in the plant area to meet emission standards. In order to reduce the treatment cost of the VOCs treatment system 1, this application changes the original organic waste gas treatment route. The waste gas above the scraper conveyor is drawn into the scraper conveyor upper waste gas pipeline 3 by the original fan. The waste gas in the scraper conveyor upper waste gas pipeline 3 and the semi-coke belt corridor waste gas pipeline 2 is drawn into the branch pipeline by the first centrifugal fan 10 and then into the four gas inlet pipelines 8 of the SJ-IV type dry distillation furnace 7, and then into the negative pressure zone of the air fan of the SJ-IV type dry distillation furnace 7. Finally, all the waste gas in the semi-coke belt corridor waste gas pipeline 2 and the scraper conveyor upper waste gas pipeline 3 is drawn into the SJ-IV type dry distillation furnace 7 as part of the heat source and mixed with the coal gas in the SJ-IV type dry distillation furnace 7 for combustion, which is used for the low-temperature dry distillation process of oil shale in the SJ-IV type dry distillation furnace 7.

[0017] In addition, pressure gauges 5 and flow meters 6 are installed at the second butterfly valves 4 of the exhaust gas pipes 2 and 3 above the scraper conveyor in the semi-coke belt corridor. Through frequency conversion adjustment of the original first centrifugal fan 10 on the exhaust gas pipes 2 and 3 above the scraper conveyor, the gas above the scraper conveyor and the organic waste gas in the belt corridor of the SJ-IV type dry distillation furnace 7 are all drawn into the SJ-IV type dry distillation furnace 7 by the second centrifugal fan 11 to participate in the low-temperature dry distillation process of oil shale, so as to reduce the emission of volatile organic compounds and reduce the production and VOCs treatment system 1 of the SJ-IV type dry distillation furnace 7.

Claims

1. A volatile organic compound (VOC) waste gas purification and treatment device, comprising a VOCs treatment system (1) and an SJ-IV type dry distillation furnace (7), wherein the waste gas inlet of the VOCs treatment system (1) is connected to the waste gas pipe (2) of the semi-coke conveyor belt corridor and the waste gas pipe (3) above the scraper conveyor, and a first centrifugal fan (10) is provided on the waste gas pipe (2) of the semi-coke conveyor belt corridor and the waste gas pipe (3) above the scraper conveyor, characterized in that: The exhaust gas pipe (2) of the semi-coke belt corridor and the exhaust gas pipe (3) of the upper part of the scraper conveyor are provided with branch pipes that are connected to the gas inlet pipe (8) of the SJ-IV type dry distillation furnace (7). Each gas inlet pipe (8) is provided with a first butterfly valve (9) and a second centrifugal fan (11). The exhaust gas pipe (2) of the semi-coke belt corridor and the exhaust gas pipe (3) of the upper part of the scraper conveyor are respectively provided with a second butterfly valve (4) on the side near the VOCs treatment system (1). A pressure gauge (5) and a flow meter (6) are respectively provided at the second butterfly valve (4).

2. The volatile organic waste gas purification and treatment device as described in claim 1, characterized in that: The gas inlet pipe (8) is a galvanized iron pipe.

3. The volatile organic waste gas purification and treatment device as described in claim 2, characterized in that: Both the first butterfly valve (9) and the second butterfly valve (4) are stainless steel butterfly valves.

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