Equipment for treating VOCs (volatile organic compounds) waste gas by heat storage catalytic combustion method

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to VOCs waste gas heat storage catalytic combustion method treatment equipment which comprises a horizontal treatment tank, an air inlet is formed in one side of the horizontal treatment tank, a preheating chamber is installed in the horizontal treatment tank, a heating chamber is installed in the horizontal treatment tank, and an air funnel is installed between the preheating chamber and the heating chamber. The horizontal treatment tank is internally provided with a first treatment chamber and a second treatment chamber, a plurality of connecting pipes are arranged between the first treatment chamber and the second treatment chamber, the plurality of connecting pipes are all arranged in the ventilation barrel, the horizontal treatment tank is internally provided with a waste heat recovery chamber, and the waste heat recovery chamber is communicated with the second treatment chamber; through normal flow of the gas in the horizontal treatment tank, the gas treated by the first treatment chamber carries the heat of reaction to reheat the waste gas passing through the ventilator, so that the heat generated in the waste gas treatment process is reasonably utilized, and the energy consumption of waste gas treatment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and particularly relates to a treatment device for VOCs waste gas by regenerative catalytic combustion method. Background Technique

[0002] Volatile organic compounds, commonly represented by VOCs and sometimes by TVOC, are compounds with boiling points between 50°C and 250°C according to the definition of the World Health Organization. Their saturated vapor pressure exceeds 133.32 Pa at room temperature, and they exist in the air in the form of vapor at normal temperature. Most volatile organic compounds are flammable, explosive and unsafe. Under sunlight, volatile organic compounds react with nitrogen oxides, hydrocarbons and oxidants in the atmosphere to generate photochemical smog, which endangers human health and crop growth; they irritate people's eyes and respiratory systems, endanger people's physical health and the growth of crops. When the printing system is working, it will generate VOCs waste gas. If directly discharged into the atmosphere, it will cause air pollution.

[0003] At present, the main VOC waste gas treatment technologies include: thermal destruction method, adsorption method, biological treatment method, oxidation method, etc. Existing equipment is large-scale treatment equipment, which needs to be disassembled and transported to the site for secondary construction and installation. And in the existing technology, the direct combustion method is commonly used to treat organic waste gas. For example, the combustion equipment is directly connected to the workshop production unit, and the generated organic waste gas is discharged from the workshop production unit into the combustion equipment. Since the reaction temperature of the organic waste gas is much higher than the temperature of the organic waste gas discharged from the unit, when the organic waste gas directly enters the combustion equipment, it will absorb a large amount of heat of the equipment during the heating process. To ensure the waste gas purification effect, the combustion equipment needs to continuously use auxiliary fuel to maintain the internal temperature of the equipment within the reaction temperature range of the organic waste gas, resulting in more energy consumption. Therefore, a horizontal integrated treatment device for VOCs waste gas is needed to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a treatment device for VOCs waste gas by regenerative catalytic combustion method. Through the normal flow of gas in the horizontal treatment tank, the gas treated in the first treatment chamber carries the heat of the reaction to reheat the waste gas passing through the ventilation cylinder, so as to reasonably utilize the heat generated in the process of treating waste gas and reduce the energy consumption of waste gas treatment.

[0005] To achieve the above technical purpose, the technical scheme adopted by the utility model is as follows:

[0006] A treatment device for VOCs waste gas by regenerative catalytic combustion method, including a horizontal treatment tank. An air inlet is provided on one side of the horizontal treatment tank. A preheating chamber is installed inside the horizontal treatment tank, and the preheating chamber is in communication with the air inlet. A heating chamber is installed inside the horizontal treatment tank. A ventilation cylinder is installed inside the horizontal treatment tank. The preheating chamber and the heating chamber are in communication with each other through the ventilation cylinder. A first treatment chamber is installed inside the horizontal treatment tank. A second treatment chamber is installed inside the horizontal treatment tank. A number of connecting pipes are installed between the first treatment chamber and the second treatment chamber, and all the connecting pipes are installed in the ventilation cylinder. A waste heat recovery chamber is installed inside the horizontal treatment tank, and the waste heat recovery chamber is in communication with the second treatment chamber. An air outlet is provided on one side of the horizontal treatment tank, and the waste heat recovery chamber is in communication with the air outlet. A pretreatment device is installed on one side of the horizontal treatment tank.

[0007] The pretreatment device includes a first filter installed on one side of the horizontal treatment tank. A blower is installed on one side of the horizontal treatment tank, and the blower is in communication with the filter. An air inlet pipe is installed on the upper side of the horizontal treatment tank, and one end of the air inlet pipe is in communication with the blower. A zeolite wheel concentrator is installed on one side of the horizontal treatment tank, and the zeolite wheel concentrator is in communication with the air inlet. The other end of the air inlet pipe is connected to the zeolite wheel concentrator. A second filter in communication with each other is installed on one side of the zeolite wheel concentrator.

[0008] The zeolite wheel concentrator abuts against the waste heat recovery chamber.

[0009] A smoke exhaust pipe is installed on one side of the horizontal treatment tank, and an air outlet pipe is fixedly provided between the smoke exhaust pipe and the air outlet.

[0010] A number of overheat protection valves are installed on the horizontal treatment tank.

[0011] An automatic drainer is installed on the lower side of the horizontal treatment tank.

[0012] A number of inspection openings are provided on the horizontal treatment tank.

[0013] In the present utility model, through the normal flow of gas in the horizontal treatment tank, the gas treated by the first treatment chamber carries the heat of the reaction to reheat the waste gas passing through the ventilation cylinder, thereby reasonably utilizing the heat generated during the waste gas treatment process and reducing the energy consumption for waste gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model can be further illustrated by the non-limiting embodiments given in the drawings.

[0015] Figure 1This is the front view structural schematic diagram of an embodiment of the treatment equipment for VOCs waste gas by regenerative catalytic combustion of the present utility model;

[0016] Figure 2 This is the structural schematic diagram of the ventilation cylinder in an embodiment of the treatment equipment for VOCs waste gas by regenerative catalytic combustion of the present utility model;

[0017] Figure 3 This is the top view structural schematic diagram of an embodiment of the treatment equipment for VOCs waste gas by regenerative catalytic combustion of the present utility model;

[0018] The main element symbols are explained as follows:

[0019] Horizontal treatment tank 1, preheating chamber 10, heating chamber 11, ventilation cylinder 12, first treatment chamber 13, second treatment chamber 14, connecting pipe 16, waste heat recovery chamber 15, first filter 20, blower 21, air inlet pipe 22, zeolite wheel concentrator 23, exhaust pipe 30, air outlet pipe 31, overheat protection valve 33, automatic drain 34, inspection port 35. Detailed implementation manners

[0020] In order to enable those skilled in the art to better understand the present utility model, the technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0021] As Figures 1-3 shown, a treatment equipment for VOCs waste gas by regenerative catalytic combustion of the present utility model includes a horizontal treatment tank 1. An air inlet is provided on one side of the horizontal treatment tank 1. A preheating chamber 10 is installed inside the horizontal treatment tank 1, and the preheating chamber 10 is in communication with the air inlet. A heating chamber 11 is installed inside the horizontal treatment tank 1. A ventilation cylinder 12 is installed inside the horizontal treatment tank 1. The preheating chamber 10 and the heating chamber 11 are in communication with each other through the ventilation cylinder 12. A first treatment chamber 13 is installed inside the horizontal treatment tank 1. A second treatment chamber 14 is installed inside the horizontal treatment tank 1. A number of connecting pipes 16 are installed between the first treatment chamber 13 and the second treatment chamber 14, and all the number of connecting pipes 16 are installed in the ventilation cylinder 12. A waste heat recovery chamber 15 is installed inside the horizontal treatment tank 1, and the waste heat recovery chamber 15 is in communication with the second treatment chamber 14. An air outlet is provided on one side of the horizontal treatment tank 1, and the waste heat recovery chamber 15 is in communication with the air outlet. A pretreatment device is installed on one side of the horizontal treatment tank 1;

[0022] A combustion device is installed in the present utility model, and the combustion device is in communication with the heating chamber 11. The combustion device heats the waste gas entering the heating chamber 11 by burning energy, so as to enable the waste gas to meet the temperature requirements of the first treatment chamber 13 for the waste gas;

[0023] During the use of the present utility model, the waste gas first undergoes preliminary treatment by a pretreatment device, and then enters the interior of the horizontal treatment tank 1 from the air inlet. It first enters the preheating chamber 10 for preliminary preheating, and then flows into the heating chamber 11 through the ventilation tube 12. The combustion equipment heats the waste gas entering the heating chamber 11 to make the waste gas reach the temperature required for the first treatment chamber 13. The heated waste gas then enters the first treatment chamber 13 for reaction treatment, reacting with the reaction plate in the first treatment chamber 13. A large amount of heat is generated when the waste gas reacts with the reaction plate. The reacted gas carries heat and flows into the second treatment chamber 14 through the connecting pipe 16. Then, the reacted gas exchanges heat with the waste gas flowing into the heating chamber 11 through the ventilation tube 12, reheating the waste gas entering the heating chamber. The reacted gas then goes to the second treatment chamber 14 for secondary reaction treatment to thoroughly treat the waste gas and ensure that the discharged gas meets the standards;

[0024] The present utility model preheats the waste gas by blowing it from the air inlet into the preheating chamber in the horizontal treatment tank. The preheated waste gas passes through the ventilation tube to the heating chamber and is heated to the temperature required for the reaction, and then goes to the first treatment chamber for reaction treatment. The treated gas passes through the connecting pipe and then goes to the second treatment chamber for secondary reaction treatment. When the gas flowing through the connecting pipe after the first treatment reaction heats the gas flowing from the preheating chamber to the heating chamber, the heat generated by the first treatment of the waste gas is reasonably utilized, reducing the energy consumption for waste gas treatment.

[0025] The pretreatment device includes a first filter 20 installed on one side of the horizontal treatment tank 1. A blower 21 is installed on one side of the horizontal treatment tank 1. The blower 21 is interconnected with the first filter 20. An air inlet pipe 22 is installed on the upper side of the horizontal treatment tank 1. One end of the air inlet pipe 22 is interconnected with the blower 21. A zeolite wheel concentrator 23 is installed on one side of the horizontal treatment tank 1. The zeolite wheel concentrator 23 is interconnected with the air inlet. The other end of the air inlet pipe 22 is connected to the zeolite wheel concentrator 23. A second filter interconnected with each other is installed on one side of the zeolite wheel concentrator 23;

[0026] When the present utility model is in use, the waste gas first passes through the first filter 20 for filtration to filter the waste gas to be treated and prevent larger impurities, etc. from entering, thereby ensuring the normal use of the horizontal treatment tank 1. The filtered waste gas is blown into the air inlet pipe 22 by the blower 21. The waste gas passes through the air inlet pipe 22 and enters the zeolite wheel concentrator 23. The zeolite wheel concentrator 23 processes the incoming large-volume, low-concentration waste gas into high-concentration, small-volume concentrated waste gas and transports it into the horizontal treatment tank 1, thereby reducing the operating cost of the device, accelerating the waste gas treatment efficiency, and at the same time, it can transfer volatile organic compounds to the desorption area for preliminary treatment to prevent them from entering the horizontal treatment tank 1. At the same time, the zeolite wheel concentrator 23 can control the waste gas inlet concentration to make the subsequent reactions in the device more stable.

[0027] The zeolite wheel concentrator 23 is in contact with the waste heat recovery chamber 15; there is a gas exchange port between the waste heat recovery chamber 15 and the zeolite wheel concentrator 23 in the present utility model. The heat in the waste heat recovery chamber 15 is transferred to the zeolite wheel through one of the gas exchange ports to heat the zeolite. After the zeolite wheel cools down, the cooled gas is sent back into the waste heat recovery chamber 15 through the other gas exchange port. The heat generated by the waste gas treatment reaction is used to heat the zeolite, reducing energy consumption and lowering the usage cost of this device.

[0028] A smoke exhaust pipe 30 is installed on one side of the horizontal treatment tank 1, and an air outlet pipe 31 is fixedly arranged between the smoke exhaust pipe 30 and the air outlet; the treated gas is discharged to ensure the normal upward discharge of the gas and prevent the gas from accumulating in the air outlet pipe 31.

[0029] Furthermore, the air inlet is adjacent to the side of the air outlet pipe 31 close to the horizontal treatment tank 1, enabling heat exchange between the incoming waste gas and the gas in the air outlet pipe 31. The incoming waste gas is preliminarily preheated by the preheated gas in the air outlet pipe 31, and at the same time, the temperature of the gas flowing through the air outlet pipe 31 is reduced to prevent the smoke exhaust pipe 30 from being overheated and ensure the normal use of the smoke exhaust pipe 30.

[0030] The horizontal treatment tank 1 is equipped with a number of overheat protection valves 33; when the detected temperature is too high, the overheat protection valves will discharge a part of the high-temperature gas to ensure the smooth operation of this device.

[0031] An automatic drainer 34 is installed under the horizontal treatment tank 1; the water generated during the waste gas treatment process in the horizontal treatment tank 1 is drained to ensure the smooth use of this device.

[0032] The horizontal treatment tank 1 is provided with a number of maintenance openings 35; it is convenient for users to perform maintenance and repair on the interior of the horizontal treatment tank 1.

[0033] The above embodiments are only used to exemplarily illustrate the principles and effects of the present utility model, rather than to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An equipment for treating VOCs waste gas by regenerative catalytic combustion method, including a horizontal treatment tank, characterized in that: An air inlet is provided on one side of the horizontal treatment tank. A preheating chamber is installed inside the horizontal treatment tank. The preheating chamber is in communication with the air inlet. A heating chamber is installed inside the horizontal treatment tank. A ventilation tube is installed inside the horizontal treatment tank. The preheating chamber and the heating chamber are in communication with each other through the ventilation tube. A first treatment chamber is installed inside the horizontal treatment tank. A second treatment chamber is installed inside the horizontal treatment tank. A number of connecting pipes are installed between the first treatment chamber and the second treatment chamber. All of the number of connecting pipes are installed inside the ventilation tube. A waste heat recovery chamber is installed inside the horizontal treatment tank. The waste heat recovery chamber is in communication with the second treatment chamber. An air outlet is provided on one side of the horizontal treatment tank. The waste heat recovery chamber is in communication with the air outlet. A pretreatment device is installed on one side of the horizontal treatment tank; The pretreatment device includes a first filter installed on one side of the horizontal treatment tank. A blower is installed on one side of the horizontal treatment tank. The blower is in communication with the filter. An air inlet pipe is installed on the upper side of the horizontal treatment tank. One end of the air inlet pipe is in communication with the blower. A zeolite wheel concentrator is installed on one side of the horizontal treatment tank. The zeolite wheel concentrator is in communication with the air inlet. The other end of the air inlet pipe is connected to the zeolite wheel concentrator. A second filter in communication with each other is installed on one side of the zeolite wheel concentrator; The zeolite wheel concentrator abuts against the waste heat recovery chamber.

2. The treatment equipment for VOCs waste gas by regenerative catalytic combustion according to claim 1, wherein: A smoke exhaust pipe is installed on one side of the horizontal treatment tank. An air outlet pipe is fixedly provided between the smoke exhaust pipe and the air outlet.

3. The VOCs waste gas regenerative catalytic combustion treatment equipment according to claim 1, wherein: The horizontal treatment tank is equipped with a number of overheat protection valves.

4. The treatment equipment for VOCs waste gas by regenerative catalytic combustion according to claim 1, characterized in that: An automatic drainer is installed on the lower side of the horizontal treatment tank.

5. The treatment equipment for VOCs waste gas by regenerative catalytic combustion according to claim 1, wherein: The horizontal treatment tank is provided with a number of inspection openings.

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