A method for removing organic waste gas

Abstract

The present invention discloses a method for removing organic waste gas, which comprises the following steps: (1) burning the organic waste gas in a combustion furnace to remove the organic waste gas efficiently and quickly; (2) mixing the hydrogen chloride generated by the combustion of the organic waste gas with hot water steam to generate hydrogen ions and chloride ions, and absorbing and treating the hydrogen chloride in the waste gas under the action of a pulse electric field; (3) degrading the dioxins generated by the combustion of the organic waste gas by microorganisms; (4) the combustion flue gas treated by steps 2 and 3 is further passed into an activated carbon adsorption layer, and other non-electrical toxic substances are adsorbed by the activated carbon and discharged into an external environment. The present invention has the beneficial effect of being able to quickly clean up the organic waste gas while avoiding the discharge of toxic substances and corrosive substances, and is mainly used for the rapid removal of organic waste gas containing chlorine, brominated organic matter and aromatic hydrocarbon substances.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas purification, in particular to a method for removing organic waste gas. Background Art

[0002] Volatile organic compounds (VOCs) are an important type of air pollutant. Their proportion in air pollutants is constantly increasing, and their harm to humans and the ecological environment is becoming increasingly serious. This has attracted widespread public attention, and as a result, many countries have formulated a series of strict laws and regulations to control VOCs emissions.

[0003] At present, there are many methods for treating VOCs, including physical treatment methods (carbon adsorption, absorption, condensation, membrane separation technology), chemical methods (thermal oxidation, catalytic combustion, biological oxidation, plasma, corona, ultraviolet catalytic oxidation, etc.) and biological treatment methods. The first two methods are limited in practical applications due to poor treatment effects and high costs. The biological method is regarded as an economical, environmentally friendly and stable method for treating VOCs.

[0004] When the organic waste gas contains chlorinated, brominated organic matter and aromatic hydrocarbons, dioxin-like substances are easily produced, especially during the startup and shutdown of incineration. When the organic waste gas contains chlorinated organic matter, hydrogen chloride corrosion problems will occur, especially in high temperature environments, the corrosion performance of hydrogen chloride is greatly enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a method for removing organic waste gas that can quickly clean up organic waste gas while avoiding the discharge of toxic and corrosive substances.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a method for removing organic waste gas, characterized by having the following steps:

[0007] Step 1: Combustion treatment of organic waste gas:

[0008] The organic waste gas generated in the production process is collected uniformly and introduced into a combustion furnace for combustion. The combustion furnace is provided with a jet port and connected to a pressure pump. The organic waste gas is pressurized by the pressure pump and sprayed from the jet port to the combustion furnace. The emission of the organic waste gas is controlled by controlling the output power of the pressure pump. The heat generated in the combustion process of the organic waste gas is used as a heat source;

[0009] Step 2: Treatment of hydrogen chloride product:

[0010] When the organic waste gas containing chlorinated organic matter is burned in the combustion furnace in the step 1, hydrogen chloride is generated by the combustion in the combustion furnace, and the waste gas containing hydrogen chloride generated by the combustion in the combustion furnace is fully mixed with water vapor to generate hydrogen ions and chloride ions, and the hydrogen ions and chloride ions are passed into a pulsed electric field, and the hydrogen ions and chloride ions and other charged particles therein are absorbed and processed by the pulsed electric field to remove the hydrogen chloride in the waste gas;

[0011] Step 3: Treatment of dioxins:

[0012] In the step 1, when the chlorine-containing, brominated organic matter and aromatic hydrocarbon substances in the organic waste gas are burned by the combustion furnace, dioxin-like substances are generated. After the waste gas containing dioxin substances generated by the combustion of the combustion furnace is cooled, it is degraded by microorganisms, and the generated dioxin substances are degraded by microorganisms to remove the dioxin-like substances generated during the combustion process;

[0013] Step 4: Activated carbon treatment of remaining toxic substances:

[0014] The combustion flue gas treated in step 2 and step 3 is further passed into the activated carbon adsorption layer, and other non-electrical toxic substances are adsorbed by the activated carbon. After the adsorption, the flue gas meets the emission standards and is discharged into the external environment.

[0015] If the organic waste gas in the step 1 contains only chlorinated organic matter but does not contain brominated organic matter and aromatic hydrocarbon substances, the removal method thereof adopts the method of step 1, step 2 and step 4 for removal.

[0016] In the step 1, the collection of organic waste gas is ensured to be carried out at room temperature, and explosion-proof equipment is installed during the collection of organic waste gas.

[0017] The water vapor used in the step 2 is water vapor generated by heating water to a boiling state using the heat generated by burning the organic waste gas in the combustion furnace.

[0018] In the step 2, the corona inception voltage of the pulse electric field is set to 25 kV, the waveform valley value of the pulse voltage is set to 30 kV, the pulse peak voltage is set to 60 kV, the pulse width is set to 200 ns, and the repetition frequency is 50 Hz.

[0019] In the step 4, the activated carbon adsorption layer is a honeycomb structure, and activated carbon is attached to each group of holes in the honeycomb structure. The flue gas treated in step 2 or step 3 flows stably from one end of the adsorption layer to the other end, removing the neutral particles carried in the flue gas.

[0020] The hole diameter of the honeycomb structure of the adsorption layer is set to 1-5 cm, the adsorption layer is in a cylindrical structure as a whole and its diameter is set to 25-50 cm, and the thickness of the adsorption layer is set to 0.5-2.5 m.

[0021] In the step 1, the heat generated by the combustion of the organic waste gas in the combustion furnace is used as a heat source to heat the production process that requires heating.

[0022] The beneficial effects of the present invention are as follows: through step 2, the hydrogen chloride gas generated by the combustion of organic waste gas is adsorbed and treated, and the hydrogen ions, chloride ions and other charged particles therein are absorbed and treated by a pulse electric field to remove the hydrogen chloride in the waste gas, thereby avoiding the discharge of hydrogen chloride to affect the environment; through step 3, the dioxin substances generated by the combustion of organic waste gas are subjected to microbial degradation, and the generated dioxin substances are subjected to microbial degradation by microorganisms to remove the dioxin-like substances generated during the combustion process; thereby, the combustion treatment of the organic waste gas is achieved to efficiently clean the organic waste gas while avoiding the discharge of toxic substances and corrosive substances. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] A method for removing organic waste gas, characterized by comprising the following steps:

[0026] Step 1: Combustion treatment of organic waste gas:

[0027] The organic waste gas generated in the production process is collected uniformly and introduced into a combustion furnace for combustion. A jet port is provided in the combustion furnace and a pressure pump is connected to the jet port. The organic waste gas is pressurized by the pressure pump and sprayed from the jet port to the combustion furnace. The emission of the organic waste gas is controlled by controlling the output power of the pressure pump. The heat generated in the combustion process of the organic waste gas is used as a heat source;

[0028] Step 2: Treatment of hydrogen chloride product:

[0029] In step 1, when the organic waste gas contains chlorinated organic matter, hydrogen chloride is generated by the combustion in the combustion furnace. The waste gas containing hydrogen chloride generated by the combustion in the combustion furnace is fully mixed with water vapor to generate hydrogen ions and chloride ions, and the hydrogen ions and chloride ions are passed into a pulsed electric field. The hydrogen ions and chloride ions and other charged particles therein are absorbed and processed by the pulsed electric field to remove the hydrogen chloride in the waste gas.

[0030] Step 3: Treatment of dioxins:

[0031] In step 1, when burning chlorine-containing, brominated organic matter and aromatic hydrocarbons in the organic waste gas through the combustion furnace, dioxin-like substances are generated. After the waste gas containing dioxin-like substances generated by the combustion furnace is cooled, it is degraded by microorganisms, and the generated dioxin-like substances are degraded by microorganisms to remove the dioxin-like substances generated during the combustion process;

[0032] Step 4: Activated carbon treatment of remaining toxic substances:

[0033] The combustion flue gas treated in step 2 and step 3 is further passed into the activated carbon adsorption layer, and other non-electrical toxic substances are adsorbed by the activated carbon. After the adsorption, the flue gas meets the emission standards and is discharged into the external environment.

[0034] In the utility model, if the organic waste gas in step 1 contains only chlorinated organic matter but does not contain brominated organic matter and aromatic hydrocarbon substances, the removal method thereof adopts the method of step 1, step 2 and step 4 to remove the organic waste gas;

[0035] In step 1, the collection of organic waste gas is carried out at room temperature, and explosion-proof equipment is installed during the collection of organic waste gas to avoid explosions during the collection and combustion of organic waste gas;

[0036] The water vapor used in step 2 is water vapor generated by heating water to a boiling state using the heat generated by the combustion of organic waste gas by the combustion furnace, which can effectively utilize the heat generated by the combustion of organic waste gas by the combustion furnace;

[0037] In step 2, the corona inception voltage of the pulse electric field is set to 25 kV, the waveform valley value of the pulse voltage is set to 30 kV, the pulse peak voltage is set to 60 kV, the pulse width is set to 200 ns, and the repetition frequency is 50 Hz;

[0038] In step 4, the activated carbon adsorption layer is a honeycomb structure, and activated carbon is attached to each group of holes in the honeycomb structure. The flue gas treated in step 2 or step 3 flows stably from one end of the adsorption layer to the other end, removing the neutral particles carried in the flue gas, ensuring that the neutral particles are removed quickly and efficiently;

[0039] The hole diameter of the honeycomb structure of the adsorption layer is set to 1-5 cm, the adsorption layer is cylindrical in structure as a whole and its diameter is set to 25-50 cm, and the thickness of the adsorption layer is set to 0.5-2.5 m;

[0040] In step one, the heat generated by the combustion of organic waste gas in the combustion furnace is used as a heat source to heat the production process that requires heating, thereby effectively utilizing the heat generated by the combustion of organic waste gas in the combustion furnace.

[0041] Example 2

[0042] A method for removing organic waste gas, characterized in that, when the organic waste gas contains only chlorinated organic matter but not brominated organic matter and aromatic hydrocarbon substances, the method comprises the following steps:

[0043] Step 1: Combustion treatment of organic waste gas:

[0044] The organic waste gas generated in the production process is collected uniformly and introduced into a combustion furnace for combustion. A jet port is provided in the combustion furnace and a pressure pump is connected to the jet port. The organic waste gas is pressurized by the pressure pump and sprayed from the jet port to the combustion furnace. The emission of the organic waste gas is controlled by controlling the output power of the pressure pump. The heat generated in the combustion process of the organic waste gas is used as a heat source;

[0045] Step 2: Treatment of hydrogen chloride product:

[0046] In step 1, when the organic waste gas contains chlorinated organic matter, hydrogen chloride is generated by the combustion in the combustion furnace. The waste gas containing hydrogen chloride generated by the combustion in the combustion furnace is fully mixed with water vapor to generate hydrogen ions and chloride ions, and the hydrogen ions and chloride ions are passed into a pulsed electric field. The hydrogen ions and chloride ions and other charged particles therein are absorbed and processed by the pulsed electric field to remove the hydrogen chloride in the waste gas.

[0047] Step 3: Activated carbon treatment of remaining toxic substances:

[0048] The combustion flue gas treated in step 2 is further passed into the activated carbon adsorption layer, and other non-electrical toxic substances are adsorbed by the activated carbon. After the adsorption, the flue gas meets the emission standards and is discharged into the external environment.

[0049] Example 3

[0050] The beneficial effects of the present invention are as follows: through step 2, the hydrogen chloride gas generated by the combustion of organic waste gas is adsorbed and treated, and the hydrogen ions, chloride ions and other charged particles therein are absorbed and treated by a pulse electric field to remove the hydrogen chloride in the waste gas, thereby avoiding the discharge of hydrogen chloride to affect the environment; through step 3, the dioxin substances generated by the combustion of organic waste gas are subjected to microbial degradation, and the generated dioxin substances are subjected to microbial degradation by microorganisms to remove the dioxin-like substances generated during the combustion process; thereby, the combustion treatment of the organic waste gas is achieved to efficiently clean the organic waste gas while avoiding the discharge of toxic and corrosive substances.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for removing organic waste gas, characterized in that: The steps are as follows: Step 1: Combustion treatment of organic waste gas: The organic waste gas generated in the production process is collected uniformly and introduced into a combustion furnace for combustion. The combustion furnace is provided with a jet port and connected to a pressure pump. The organic waste gas is pressurized by the pressure pump and sprayed from the jet port to the combustion furnace. The emission of the organic waste gas is controlled by controlling the output power of the pressure pump. The heat generated in the combustion process of the organic waste gas is used as a heat source; Step 2: Treatment of hydrogen chloride product: When the organic waste gas containing chlorinated organic matter is burned in the combustion furnace in the step 1, hydrogen chloride is generated by the combustion in the combustion furnace, and the waste gas containing hydrogen chloride generated by the combustion in the combustion furnace is fully mixed with water vapor to generate hydrogen ions and chloride ions, and the hydrogen ions and chloride ions are passed into a pulsed electric field, and the hydrogen ions and chloride ions and other charged particles therein are absorbed and processed by the pulsed electric field to remove the hydrogen chloride in the waste gas; Step 3: Treatment of dioxins: In the step 1, when the chlorine-containing, brominated organic matter and aromatic hydrocarbon substances in the organic waste gas are burned by the combustion furnace, dioxin-like substances are generated. After the waste gas containing dioxin substances generated by the combustion furnace is cooled, it is degraded by microorganisms, and the generated dioxin substances are degraded by microorganisms to remove the dioxin-like substances generated during the combustion process; Step 4: Activated carbon treatment of remaining toxic substances: The combustion flue gas treated in step 2 and step 3 is further passed into the activated carbon adsorption layer, and other non-electrical toxic substances are adsorbed by the activated carbon. After the adsorption, the flue gas meets the emission standards and is discharged into the external environment; In the step 2, the corona inception voltage of the pulse electric field is set to 25 kV, the waveform valley value of the pulse voltage is set to 30 kV, the pulse peak voltage is set to 60 kV, the pulse width is set to 200 ns, and the repetition frequency is 50 Hz; In the step 4, the activated carbon adsorption layer is a honeycomb structure, and activated carbon is attached to each group of holes in the honeycomb structure. The flue gas treated in step 2 or step 3 flows stably from one end of the adsorption layer to the other end to remove neutral particles carried in the flue gas. The hole diameter of the honeycomb structure of the adsorption layer is set to 1-5cm, the adsorption layer is an overall cylindrical structure and its diameter is set to 25-50cm, and the thickness of the adsorption layer is set to 0.5-2.5m.

2. The method for removing organic waste gas according to claim 1, characterized in that: If the organic waste gas in the step 1 contains only chlorinated organic matter but does not contain brominated organic matter and aromatic hydrocarbon substances, the removal method thereof adopts the method of step 1, step 2 and step 4 for removal.

3. The method for removing organic waste gas according to claim 1, characterized in that: In the step 1, the collection of organic waste gas is ensured to be carried out at room temperature, and explosion-proof equipment is installed during the collection of organic waste gas.

4. The method for removing organic waste gas according to claim 1, characterized in that: The water vapor used in the step 2 is water vapor generated by heating water to a boiling state using the heat generated by burning the organic waste gas in the combustion furnace.

5. The method for removing organic waste gas according to claim 1, characterized in that: In the step 1, the heat generated by the combustion of the organic waste gas in the combustion furnace is used as a heat source to heat the production process that requires heating.