Organic waste gas recovery and treatment system

Abstract

The utility model provides a kind of organic waste gas recovery management system, including sequentially connected waste gas collecting device, pretreatment unit, adsorption concentration device, desorption regeneration unit, condensation recovery unit and tail gas treatment device, the waste gas collecting device is used to collect organic waste gas, its air inlet is connected with organic waste gas generation source, the pretreatment unit is used to carry out pretreatment to the organic waste gas collected, remove particulate matter, moisture impurities in waste gas.This kind of organic waste gas recovery management system, simple and reasonable structure, novel design, easy operation, with higher practicality, it is convenient to widely use.

Description

Technical Field

[0001] This utility model relates to the technical field of organic waste gas recovery and treatment system, specifically to an organic waste gas recovery and treatment system. Background Technology

[0002] In numerous fields such as industrial production, chemical manufacturing, coating operations, and printing and packaging, the emission of organic waste gases is a widespread and urgent environmental problem. These organic waste gases are complex in composition, containing harmful substances such as volatile organic compounds. If they are directly emitted into the atmosphere without effective treatment, they will not only cause serious air pollution, leading to environmental problems such as smog and photochemical smog, threatening the ecological balance, but also pose a great threat to human health, such as irritating the respiratory tract, damaging the nervous system, and even potentially posing a carcinogenic risk.

[0003] Currently, there are various technical methods available for the treatment of organic waste gas, but they all have some shortcomings. Some traditional organic waste gas treatment systems only use a single treatment process, such as direct combustion. Although they can treat organic waste gas to a certain extent, they suffer from high energy consumption and low utilization rate.

[0004] Therefore, we have made improvements to this and proposed an organic waste gas recovery and treatment system. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses an organic waste gas recovery and treatment system, comprising a waste gas collection device, a pretreatment unit, an adsorption concentration device, a desorption regeneration unit, a condensation recovery unit, and a tail gas treatment device connected in sequence; the waste gas collection device is used to collect organic waste gas, and its air inlet is connected to the source of organic waste gas generation.

[0007] The pretreatment unit is used to pretreat the collected organic waste gas to remove particulate matter, moisture and impurities from the waste gas.

[0008] The adsorption concentration device includes multiple adsorption tanks, which are filled with adsorbent to adsorb organic matter in organic waste gas and achieve concentration of waste gas.

[0009] The desorption and regeneration unit is connected to the adsorption concentration device and is used to desorb and regenerate the adsorption tank that is saturated with adsorption, so that the adsorbent can restore its adsorption capacity.

[0010] The condensation recovery unit is connected to the desorption regeneration unit and is used to condense the desorbed high-concentration organic waste gas into liquid organic matter to realize the recovery of organic matter;

[0011] The exhaust gas treatment device is connected to the condensation recovery unit and is used to further treat the remaining exhaust gas after condensation recovery so that it meets emission standards.

[0012] As a preferred technical solution of this utility model, the waste gas collection device includes a gas collection hood and an exhaust fan. The gas collection hood is installed above the source of organic waste gas generation, and the exhaust fan is connected to the gas collection hood through a pipe to pump the organic waste gas collected by the gas collection hood to the pretreatment unit.

[0013] As a preferred embodiment of this utility model, the pretreatment unit includes a filter and a dehumidifier connected in sequence;

[0014] The filter is used to filter particulate matter in exhaust gas, and its filter element material is glass fiber or polytetrafluoroethylene.

[0015] The dehumidifier is used to remove moisture from the exhaust gas, and adopts either refrigeration dehumidification or rotary dehumidification.

[0016] As a preferred technical solution of this utility model, the adsorption concentration device further includes a switching valve and a control system;

[0017] Multiple adsorption tanks are connected to a waste gas collection device and a desorption regeneration unit via switching valves. The control system is used to control the opening and closing of the switching valves to switch the adsorption tanks between adsorption and desorption regeneration states.

[0018] As a preferred technical solution of this utility model, the desorption and regeneration unit includes a heating device and a gas conveying device;

[0019] The heating device is used to heat the desorbed gas entering the adsorption tank, and the heating temperature is 80-200℃;

[0020] The gas delivery device is used to deliver the heated desorption gas to the adsorption tank for desorption and regeneration of the adsorbent that has become saturated.

[0021] As a preferred technical solution of this utility model, the condensation recovery unit includes a condenser and a collection tank;

[0022] The condenser is used to cool the desorbed high-concentration organic waste gas to -20 to -10°C, so that the organic matter condenses into a liquid state.

[0023] The collection tank is connected to the condenser and is used to collect the condensed liquid organic matter.

[0024] As a preferred technical solution of this utility model, the exhaust gas treatment device is a catalytic combustion device;

[0025] The catalytic combustion device is used to burn and decompose organic matter in the exhaust gas into carbon dioxide and water under the action of a catalyst.

[0026] The beneficial effects of this utility model are:

[0027] This organic waste gas recovery and treatment system can efficiently recover and treat organic waste gas, realize the resource utilization of organic matter and achieve standard emission of exhaust gas, and has good economic and environmental benefits. Attached Figure Description

[0028] The above and other objects, features and advantages of this disclosure will become more apparent from the more detailed description of exemplary embodiments thereof taken in conjunction with the accompanying drawings, wherein like reference numerals generally denote like parts.

[0029] Figure 1 This is a schematic diagram of the structure of an organic waste gas recovery and treatment system according to this utility model.

[0030] In the picture:

[0031] 1. Waste gas collection device; 101. Gas collection hood; 102. Exhaust fan;

[0032] 2. Pretreatment unit; 201. Filter; 202. Dehumidifier;

[0033] 3. Adsorption and concentration device; 301. Adsorption tank; 302. Switching valve;

[0034] 4. Desorption and regeneration unit; 401. Heating device; 402. Gas conveying device;

[0035] 5. Condensation recovery unit; 501. Condenser; 502. Collection tank;

[0036] 6. Exhaust gas treatment device. Detailed Implementation

[0037] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0038] Example: Figure 1 As shown, the present invention provides an organic waste gas recovery and treatment system, comprising a waste gas collection device 1, a pretreatment unit 2, an adsorption and concentration device 3, a desorption and regeneration unit 4, a condensation and recovery unit 5, and a tail gas treatment device 6 connected in sequence.

[0039] The waste gas collection device 1 is used to collect organic waste gas, and its air inlet is connected to the source of organic waste gas generation.

[0040] The pretreatment unit 2 is used to pretreat the collected organic waste gas to remove particulate matter, moisture and impurities from the waste gas.

[0041] The adsorption concentration device 3 includes multiple adsorption tanks 301. Each adsorption tank 301 is made of cylindrical carbon steel with anti-corrosion and heat insulation treatment on the inner wall. Each adsorption tank 301 is filled with activated carbon as an adsorbent. The activated carbon is granular and has good adsorption performance. The adsorbent can also be one or more of molecular sieves or activated carbon fibers.

[0042] The desorption and regeneration unit 4 is connected to the adsorption concentration device 3 and is used to desorb and regenerate the adsorption tank 301 that is saturated with adsorption, so that the adsorbent can restore its adsorption capacity.

[0043] The condensation recovery unit 5 is connected to the desorption regeneration unit 4 and is used to condense the desorbed high-concentration organic waste gas into liquid organic matter to realize the recovery of organic matter.

[0044] The exhaust gas treatment device 6 is connected to the condensation recovery unit 5 and is used to further treat the remaining exhaust gas after condensation recovery so that it meets emission standards.

[0045] Specifically, the waste gas collection device 1 includes a gas collection hood 101 and an exhaust fan 102. The gas collection hood 101 is made of stainless steel and is funnel-shaped. Its opening size is rationally designed according to the size of the organic waste gas generation source to ensure complete coverage of the waste gas generation area and maximize the collection of organic waste gas. The gas collection hood 101 is fixed to a suitable position above the organic waste gas generation source with bolts. The exhaust fan 102 is connected to the gas collection hood 101 through a pipe. The exhaust fan 102 is a centrifugal fan, and its air volume and air pressure are selected and matched according to the actual waste gas generation volume and pipe resistance. The exhaust fan 102 is connected to the gas collection hood 101 through a pipe made of PVC or stainless steel, and its diameter is determined according to the waste gas flow rate to ensure smooth waste gas transportation. After the exhaust fan 102 is started, a negative pressure is formed at the gas collection hood 101, which draws the organic waste gas to the pretreatment unit 2.

[0046] Specifically, the pretreatment unit 2 includes a filter 201 and a dehumidifier 202 connected in sequence;

[0047] Filter 201 adopts a box-type structure, with the box material being carbon steel and the inner wall treated with anti-corrosion. Filter 201 contains a filter element made of glass fiber. Glass fiber filter elements have high filtration accuracy and dust holding capacity, effectively filtering particulate matter larger than 5μm in diameter from exhaust gas. When exhaust gas passes through filter 201, particulate matter is intercepted on the surface of the filter element. The filter element should be cleaned or replaced regularly to ensure filtration effectiveness. The filter element material can also be polytetrafluoroethylene (PTFE).

[0048] Dehumidifier 202 employs a refrigeration dehumidification method and mainly consists of a compressor, condenser 501, evaporator, and expansion valve. The outer casing of dehumidifier 202 is made of stainless steel, while the internal piping is made of copper. When filtered exhaust gas enters dehumidifier 202, the exhaust gas comes into contact with the low-temperature evaporator surface, causing the moisture in it to condense into liquid water, which is then discharged from the system through a drain pipe. The relative humidity of the dehumidified exhaust gas can be reduced to below 30%, and then it enters the adsorption concentration unit 3.

[0049] Specifically, the adsorption concentration device 3 also includes a switching valve 302 and a control system;

[0050] Multiple adsorption tanks 301 are connected to the waste gas collection device 1 and the desorption and regeneration unit 4 via switching valves 302. The switching valves 302 are pneumatic butterfly valves, which are sensitive to action and have good sealing performance.

[0051] The control system controls the opening and closing of the switching valve 302, enabling the adsorption tank 301 to switch between adsorption and desorption / regeneration states. The control system uses a PLC (Programmable Logic Controller) for control, and a preset program controls the opening and closing of the switching valve 302. During the adsorption stage, the inlet valves of some adsorption tanks 301 are opened, allowing waste gas to enter the adsorption tank 301. Organic matter is adsorbed by activated carbon, and the purified gas is discharged from the outlet valve. When the activated carbon in the adsorption tank 301 becomes saturated, the control system closes the inlet and outlet valves of that adsorption tank 301 and opens the switching valve 302 connected to other adsorption tanks 301, allowing the waste gas to be switched to other adsorption tanks 301 for adsorption treatment.

[0052] Specifically, the desorption and regeneration unit 4 includes a heating device 401 and a gas conveying device 402;

[0053] The heating device 401 is used to heat the desorbed gas entering the adsorption tank 301 at a temperature of 80-200℃. The heating device 401 is an electric heater composed of multiple sets of heating tubes made of stainless steel with a high-temperature resistant insulating coating. The electric heater is installed on the gas delivery pipeline. When desorption and regeneration of the adsorption tank 301 after adsorption saturation is required, the control system activates the electric heater to heat the desorbed gas entering the adsorption tank 301 to 120-150℃.

[0054] The gas conveying device 402 is used to transport the heated desorption gas to the adsorption tank 301 for desorption and regeneration of the saturated adsorbent. The gas conveying device 402 uses a Roots blower, which provides stable airflow and pressure, ensuring a stable delivery of the heated desorption gas to the adsorption tank 301. The desorption gas enters from the bottom of the adsorption tank 301, making full contact with the saturated activated carbon, desorbing the organic matter adsorbed by the activated carbon, forming a high-concentration organic waste gas, which is discharged from the top of the adsorption tank 301 and enters the condensation and recovery unit 5.

[0055] Specifically, the condensation recovery unit 5 includes a condenser 501 and a collection tank 502;

[0056] The condenser 501 is used to cool the desorbed high-concentration organic waste gas to -20 to -10°C, causing the organic matter to condense into a liquid state. The condenser 501 is a shell-and-tube type condenser with a stainless steel outer shell and copper internal heat exchange tubes. The condenser 501 is equipped with a refrigeration unit, using R22 or R134a as the refrigerant. When the high-concentration organic waste gas enters the condenser 501, it exchanges heat with the low-temperature refrigerant, rapidly reducing the waste gas temperature to -10 to -0°C, causing the organic matter to condense into a liquid state and flow into the collection pipe at the bottom of the condenser 501.

[0057] The collection tank 502 is connected to the condenser 501 and is used to collect the condensed liquid organic matter. The collection tank 502 is made of carbon steel with anti-corrosion treatment on the inner wall and is connected to the collection pipe of the condenser 501. The condensed liquid organic matter flows into the collection tank 502 for storage, and the organic matter in the collection tank 502 is periodically recycled.

[0058] Specifically, the exhaust gas treatment device 6 is a catalytic combustion device;

[0059] The catalytic combustion device is used to burn and decompose organic matter in the exhaust gas into carbon dioxide and water under the action of a catalyst;

[0060] The catalytic combustion unit mainly consists of a preheater, a catalytic combustion chamber, and a heat exchanger. The preheater uses electric or gas heating to heat the exhaust gas entering the catalytic combustion chamber to 250-300℃, bringing the organic matter in the exhaust gas to its ignition temperature. The catalytic combustion chamber is filled with a precious metal catalyst, and the catalyst carrier is a ceramic honeycomb structure. When the heated exhaust gas passes through the catalytic combustion chamber, under the action of the catalyst, the organic matter undergoes flameless combustion at a relatively low temperature, decomposing into carbon dioxide and water.

[0061] Workflow:

[0062] 1. The exhaust fan 102 of the waste gas collection device 1 is started to collect organic waste gas and transport it to the pretreatment unit 2.

[0063] 2. The exhaust gas passes through filter 201 and dehumidifier 202 in sequence to remove particulate matter and moisture.

[0064] 3. The pretreated waste gas enters the adsorption and concentration device 3, and part of the adsorption tank 301 is used for adsorption treatment. The organic matter is adsorbed by activated carbon, and the purified gas is discharged in compliance with the standards. When the adsorption tank 301 is saturated, it is switched to other adsorption tanks 301 to continue adsorption.

[0065] 4. The desorption and regeneration unit 4 desorbs and regenerates the adsorption tank 301 that is saturated with adsorption, desorbing the organic matter adsorbed by the activated carbon into high-concentration organic waste gas.

[0066] 5. High-concentration organic waste gas enters the condensation and recovery unit 5, where it is condensed into liquid organic matter for recovery.

[0067] 6. The remaining exhaust gas after condensation and recovery enters the exhaust gas treatment device 6, and is discharged in compliance with emission standards after catalytic combustion treatment.

[0068] Through the above specific implementation methods, this organic waste gas recovery and treatment system can efficiently recover and treat organic waste gas, realize the resource utilization of organic matter and achieve standard emission of exhaust gas, and has good economic and environmental benefits.

[0069] Those skilled in the art should understand that the above description of the embodiments of the present invention is only intended to illustrate the beneficial effects of the embodiments of the present invention, and is not intended to limit the embodiments of the present invention to any of the examples given.

[0070] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An organic waste gas recovery and treatment system, characterized in that, It includes a waste gas collection device (1), a pretreatment unit (2), an adsorption concentration device (3), a desorption regeneration unit (4), a condensation recovery unit (5), and a tail gas treatment device (6) connected in sequence. The waste gas collection device (1) is used to collect organic waste gas, and its air inlet is connected to the source of organic waste gas generation. The pretreatment unit (2) is used to pretreat the collected organic waste gas to remove particulate matter, moisture and impurities from the waste gas; The adsorption concentration device (3) includes multiple adsorption tanks (301), which are filled with adsorbent to adsorb organic matter in organic waste gas and achieve concentration of waste gas. The desorption and regeneration unit (4) is connected to the adsorption concentration device (3) and is used to desorb and regenerate the adsorption tank (301) that is saturated with adsorption, so that the adsorbent can restore its adsorption capacity. The condensation recovery unit (5) is connected to the desorption regeneration unit (4) and is used to condense the desorbed high-concentration organic waste gas into liquid organic matter to realize the recovery of organic matter; The exhaust gas treatment device (6) is connected to the condensation recovery unit (5) and is used to further treat the remaining exhaust gas after condensation recovery so that it meets emission standards.

2. The organic waste gas recovery and treatment system according to claim 1, characterized in that, The waste gas collection device (1) includes a gas collection hood (101) and a blower (102). The gas collection hood (101) is located above the source of organic waste gas generation. The blower (102) is connected to the gas collection hood (101) through a pipe and is used to pump the organic waste gas collected by the gas collection hood (101) to the pretreatment unit (2).

3. The organic waste gas recovery and treatment system according to claim 1, characterized in that, The pretreatment unit (2) includes a filter (201) and a dehumidifier (202) connected in sequence; The filter (201) is used to filter particulate matter in exhaust gas, and its filter element material is glass fiber or polytetrafluoroethylene. The dehumidifier (202) is used to remove moisture from the exhaust gas, and adopts either refrigeration dehumidification or rotary dehumidification.

4. The organic waste gas recovery and treatment system according to claim 1, characterized in that, The adsorption concentration device (3) also includes a switching valve (302) and a control system; Multiple adsorption tanks (301) are connected to the waste gas collection device (1) and the desorption regeneration unit (4) via switching valves (302). The control system is used to control the opening and closing of the switching valves (302) to realize the switching of the adsorption tanks (301) between adsorption and desorption regeneration states.

5. The organic waste gas recovery and treatment system according to claim 1, characterized in that, The desorption and regeneration unit (4) includes a heating device (401) and a gas delivery device (402); The heating device (401) is used to heat the desorbed gas entering the adsorption tank (301) at a temperature of 80-200℃. The gas delivery device (402) is used to deliver the heated desorbed gas to the adsorption tank (301) to desorb and regenerate the adsorbent that has been saturated with adsorption.

6. The organic waste gas recovery and treatment system according to claim 1, characterized in that, The condensation recovery unit (5) includes a condenser (501) and a collection tank (502); The condenser (501) is used to cool the desorbed high-concentration organic waste gas to -20-10℃, so that the organic matter condenses into liquid. The collection tank (502) is connected to the condenser (501) and is used to collect the condensed liquid organic matter.

7. The organic waste gas recovery and treatment system according to claim 1, characterized in that, The exhaust gas treatment device (6) is a catalytic combustion device; The catalytic combustion device is used to burn and decompose organic matter in the exhaust gas into carbon dioxide and water under the action of a catalyst.

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