Multi-stage filtering VOC (volatile organic compound) purification and recovery system for binding workshop

Abstract

The invention relates to the technical field of VOC purification and recovery of binding workshops, and discloses a multi-stage filtering VOC purification and recovery system for binding workshops, which comprises a VOC waste gas collection unit, a multi-stage filtering unit, a purification treatment unit and a recovery unit, the VOC waste gas collection unit comprises a gas collection hood and an air pipe, the multi-stage filter unit comprises a closed treatment box, a pretreatment filter screen, an activated carbon adsorption device and a water spraying and dust falling device, the purification treatment unit comprises an acid reaction tank, an alkaline reaction tank and a reaction tank heating device, and the recovery unit comprises a condensation liquefaction device, a VOC detector and a VOC waste gas detection pipeline; according to the system, the VOC waste gas of the binding workshop can be subjected to multi-stage filtration and adsorption, and then acid neutralization reaction is carried out, so that compounds obtained after the acid-base neutralization reaction are recycled while the VOC waste gas is purified.

Description

Technical Field

[0001] The invention belongs to the technical field of VOC purification and recovery in a binding workshop, and specifically relates to a VOC purification and recovery system for a binding workshop with multi-stage filtration. Background Art

[0002] VOC waste gas, or volatile organic waste gas, refers to organic compounds that can exist in the air in gaseous form at room temperature. VOC waste gas usually has a low boiling point, a high vapor pressure and a relative molecular mass within a certain range, which is harmful to the human body and the environment.

[0003] In the production process of the binding workshop, inks and adhesives are often used, such as floor glue, wallpaper glue, sealant, etc. These materials contain VOC components. During the coating and bonding process, these VOCs will evaporate into the environment, resulting in the generation of waste gas. In addition, the inks, fountain solutions, solvents, etc. used in the printing process also contain VOC substances, which will evaporate during use and drying, further increasing the VOC waste gas of the binding workshop.

[0004] The VOC waste gas generated by the binding workshop contains a variety of harmful substances. If it is not recycled, it will be directly discharged into the atmosphere, polluting the environment, affecting air quality, and even posing a threat to human health. By recycling VOC waste gas, the valuable components in it can be extracted and reused, thereby improving resource utilization efficiency and reducing resource waste. To this end, we propose a multi-stage filtration VOC purification and recovery system for binding workshops. Summary of the invention

[0005] The purpose of the present invention is to purify VOC waste gas while also recycling the compounds after the acid-base neutralization reaction. The present application provides a multi-stage filtration binding workshop VOC purification and recovery system.

[0006] The technical solution adopted by the present invention is as follows: A multi-stage filtration VOC purification and recovery system for a binding workshop comprises a VOC waste gas collection unit, a multi-stage filtration unit, a purification treatment unit and a recovery unit, wherein the VOC waste gas collection unit comprises a gas collecting hood and an air duct, the multi-stage filtration unit comprises a closed treatment box, a pre-treatment filter screen, an activated carbon adsorption device and a water spray dust reduction device, the purification treatment unit comprises an acidic reaction pool, an alkaline reaction pool and a reaction pool heating device, and the recovery unit comprises a condensation liquefaction device, a VOC detector and a VOC waste gas detection pipeline.

[0007] The closed treatment box is used to filter and dust the collected VOC waste gas from the binding workshop, the pre-treatment filter is used to perform primary filtration on larger solid particles and dust in the collected VOC waste gas from the binding workshop, the activated carbon adsorption device is used to adsorb and filter smaller volatile organic compounds in the VOC of the binding workshop, and the water spray dust reduction device is used to adsorb harmful substances that are easily soluble in water in the VOC waste gas of the binding workshop; The acidic reaction pool is used to carry out a neutralization reaction on the alkaline substances in the VOC waste gas generated by the binding workshop. The alkaline reaction pool is used to carry out a neutralization reaction on the acidic substances in the VOC waste gas generated by the binding workshop. The reaction pool heating device is used to provide a suitable temperature environment for the acid-base neutralization reaction, increase the thermal motion energy of the molecules, and promote the increase in the collision frequency between the reactant molecules, thereby accelerating the rate of the acid-base neutralization reaction, and plays an important role in increasing the reaction rate, optimizing the reaction conditions and promoting the dissolution of substances.

[0008] In a preferred embodiment of the invention, the gas collecting hood is arranged in the binding workshop near the pollution source to capture the exhaust gas.

[0009] In a preferred embodiment of the invention, the air duct is used to connect the air collecting hood and the pipeline of the closed treatment box for filtering the exhaust gas, so as to transport the exhaust gas.

[0010] In a preferred embodiment of the invention, the water spray dust reduction device includes a water storage tank, a water pump, a water pumping pipe and a nozzle, and the nozzle is installed on the top of the inner wall of the closed treatment box.

[0011] In a preferred embodiment of the invention, the acidic reaction tank contains an acidic solution of hydrochloric acid, phosphoric acid and nitric acid.

[0012] In a preferred embodiment of the invention, the alkaline reaction tank contains a limestone alkaline solution.

[0013] In a preferred embodiment of the invention, the number of the reaction tank heating devices is two, and they are respectively arranged in the acidic reaction tank and the alkaline reaction tank.

[0014] In a preferred embodiment of the invention, the condensation and liquefaction device includes a cooling box, a cooling pipe, a collecting pipe, a semiconductor refrigeration plate, a water cooling head and a cooling block. One end of the cooling pipe is connected to the closed treatment box, and the other end of the cooling pipe passes through the cooling box and is connected to the VOC waste gas detection pipeline. The collecting pipe is fixedly connected to the lower surface of the end of the cooling pipe.

[0015] In a preferred embodiment of the invention, the cooling tube is used to receive hot steam generated by the heating of the acid and alkali reaction, the semiconductor refrigeration plate is used to cool the steam inside the cooling tube passing through the cooling box, so that the steam after the acid-base neutralization reaction is condensed into liquid, and the collecting tube is used to collect the condensed liquid.

[0016] In a preferred embodiment of the invention, the VOC detector is installed inside the VOC waste gas detection pipeline, and the VOC detector is used to detect the concentration of organic compounds in the gas after purification.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, a pre-treatment filter, an activated carbon adsorption device and a water spray dust reduction device are used to perform multi-stage filtration and adsorption of solid particles and some harmful substances in the VOC exhaust gas of the binding workshop, which can effectively remove the solid particles in the exhaust gas, prevent it from affecting the subsequent exhaust gas purification treatment equipment, and improve the purification efficiency and effect.

[0018] 2. In the present invention, by using the combination of an acidic reaction tank, an alkaline reaction tank and a reaction tank heating device, the acidic or alkaline waste gas entering the reaction tank can be neutralized and heated. After the neutralization reaction, the reacted compounds will remain in the reaction tank, which is convenient for subsequent recycling.

[0019] 3. In the present invention, when the neutralization reaction is heated, a part of the waste gas and the reaction solution evaporate together and move to the inside of the cooling tube. During the movement inside the cooling tube, the waste gas and the reaction liquid are compatible and produce a chemical reaction. When it moves to the cooling tube near the cooling box, the cold end surface of the semiconductor refrigeration plate will quickly cool the air at this location through the cooling block, and then cool the cooling tube at this location, so as to quickly cool it, so that the compounds of the chemical reaction between the waste gas and the reaction liquid are liquefied and discharged from the collection tube for recycling, which is convenient for subsequent recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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.

[0022] The following will be combined Figure 1 A VOC purification and recovery system for a binding workshop with multi-stage filtration according to an embodiment of the present invention is described in detail. Example

[0023] Reference Figure 1 , a multi-stage filtering binding workshop VOC purification and recovery system, including a VOC waste gas collection unit, a multi-stage filtering unit, a purification treatment unit and a recovery unit, the VOC waste gas collection unit includes a gas collection hood and an air duct, the multi-stage filtering unit includes a closed treatment box, a pre-treatment filter, an activated carbon adsorption device and a water spray dust reduction device, the purification treatment unit includes an acid reaction pool, an alkaline reaction pool and a reaction pool heating device, and the recovery unit includes a condensation liquefaction device, a VOC detector and a VOC waste gas detection pipeline. The gas collection hood is set in the binding workshop near the pollution source to capture waste gas, and the air duct is used to connect the gas collection hood and the pipeline of the closed treatment box for filtering waste gas, and is used to transport waste gas; specifically, the gas collection hood is a collection device for the VOC waste gas pollution source of the binding workshop, which can effectively capture the VOC waste gas and other harmful gases generated by the binding workshop to prevent them from spreading to the production workshop and the atmosphere to cause pollution, and the air duct is connected to the gas collection hood, which can transport the VOC waste gas captured by the gas collection hood to the closed treatment box for further treatment and purification.

[0024] Reference Figure 1 The closed treatment box is used to filter and reduce dust on the collected VOC waste gas from the binding workshop. The pretreatment filter is used to perform primary filtration on larger solid particles and dust in the collected VOC waste gas from the binding workshop. The activated carbon adsorption device is used to adsorb and filter smaller volatile organic compounds in the VOC of the binding workshop. The water spray dust reduction device is used to adsorb harmful substances that are easily soluble in water in the VOC waste gas of the binding workshop. Specifically, the pretreatment filter, the activated carbon adsorption device and the water spray dust reduction device are used to perform multi-stage filtration and adsorption on solid particles and some harmful substances in the VOC waste gas of the binding workshop, which can effectively remove solid particles in the waste gas, prevent it from affecting subsequent waste gas purification treatment equipment, and improve purification efficiency and effect.

[0025] Reference Figure 1The water spray dust reduction device includes a water storage tank, a water pump, a water pumping pipe and a nozzle, and the nozzle is installed on the top of the inner wall of the closed treatment box; specifically, when the exhaust gas passes through the pre-treatment filter net and the secondary filtration treatment of the activated carbon adsorption device, it will come to the nozzle of the water spray dust reduction device. At this time, the water pump can be started to pump the water in the water storage tank, and the water is transported to the nozzle through the water pumping pipe and sprayed out, so as to further adsorb and reduce the water-soluble harmful substances in the VOC exhaust gas of the binding workshop. The pre-treatment filter net, the activated carbon adsorption device and the water spray dust reduction device are used to perform multi-stage filtration and adsorption of solid particles and some harmful substances in the VOC exhaust gas of the binding workshop, which can effectively remove solid particles in the exhaust gas, prevent it from affecting the subsequent exhaust gas purification treatment equipment, and improve the purification efficiency and effect.

[0026] Reference Figure 1 The acidic reaction tank is used to neutralize the alkaline substances in the VOC waste gas generated by the binding workshop. The acidic reaction tank contains an acidic solution of hydrochloric acid, phosphoric acid and nitric acid. The alkaline reaction tank is used to neutralize the acidic substances in the VOC waste gas generated by the binding workshop. The alkaline reaction tank contains an alkaline solution of limestone. The reaction tank heating device is used to provide a suitable temperature environment for the acid-base neutralization reaction, increase the thermal motion energy of the molecules, and increase the collision frequency between the reactant molecules, thereby accelerating the rate of the acid-base neutralization reaction, improving the reaction rate, optimizing the reaction conditions and promoting the dissolution of substances. It plays an important role; the number of reaction tank heating devices is two, and they are respectively arranged in the acidic reaction tank and the alkaline reaction tank; specifically, by using the cooperation of the acidic reaction tank, the alkaline reaction tank and the reaction tank heating device, the acidic or alkaline waste gas entering the reaction tank can be neutralized and heated. After the neutralization reaction, the reacted compounds will be left in the reaction tank for subsequent recycling.

[0027] Reference Figure 1The condensation and liquefaction device includes a cooling box, a cooling pipe, a collecting pipe, a semiconductor refrigeration sheet, a water-cooled head and a cooling block. One end of the cooling pipe is connected to a closed treatment box, and the other end of the cooling pipe is connected to a VOC waste gas detection pipeline after passing through the cooling box. The collecting pipe is fixedly connected to the lower surface of the end of the cooling pipe. The cooling pipe is used to receive hot steam generated when the acid and alkali are heated. The semiconductor refrigeration sheet is used to cool the steam inside the cooling pipe passing through the cooling box, so that the steam after the acid and alkali neutralization reaction is condensed into liquid, and the collecting pipe is used to collect the condensed liquid; specifically, when the neutralization reaction is heated, a part of the waste gas and the reaction solution are evaporated together by heat and move to the inside of the cooling pipe. During the movement inside the cooling pipe, the waste gas and the reaction liquid are compatible and chemically reacted. When moving to the cooling pipe near the cooling box, the cold end face of the semiconductor refrigeration sheet will quickly cool the air there through the cooling block, and then cool the cooling pipe there, so as to quickly cool it, so that the chemical reaction compounds between the waste gas and the reaction liquid are liquefied and discharged from the collecting pipe for recycling, which is convenient for subsequent recycling.

[0028] Reference Figure 1 The VOC detector is installed inside the VOC waste gas detection pipeline. The VOC detector is used to detect the concentration of organic compounds in the purified gas. Specifically, the VOC detector can detect the concentration of organic compounds in the purified gas. When it does not meet the emission standards, the gas can be re-transported to the closed treatment box through the pipeline for purification again. When it meets the emission standards, it can be directly discharged.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage filtration VOC purification and recovery system for a binding workshop, comprising a VOC waste gas collection unit, a multi-stage filtration unit, a purification treatment unit and a recovery unit, characterized in that: The VOC waste gas collection unit includes a gas collection hood and an air duct, the multi-stage filtration unit includes a closed treatment box, a pre-treatment filter, an activated carbon adsorption device and a water spray dust reduction device, the purification treatment unit includes an acid reaction pool, an alkaline reaction pool and a reaction pool heating device, and the recovery unit includes a condensation liquefaction device, a VOC detector and a VOC waste gas detection pipeline; The closed treatment box is used to filter and dust the collected VOC waste gas from the binding workshop, the pre-treatment filter is used to perform primary filtration on larger solid particles and dust in the collected VOC waste gas from the binding workshop, the activated carbon adsorption device is used to adsorb and filter smaller volatile organic compounds in the VOC of the binding workshop, and the water spray dust reduction device is used to adsorb harmful substances that are easily soluble in water in the VOC waste gas of the binding workshop; The acidic reaction pool is used to carry out a neutralization reaction on the alkaline substances in the VOC waste gas generated by the binding workshop. The alkaline reaction pool is used to carry out a neutralization reaction on the acidic substances in the VOC waste gas generated by the binding workshop. The reaction pool heating device is used to provide a suitable temperature environment for the acid-base neutralization reaction, increase the thermal motion energy of the molecules, and promote the increase in the collision frequency between the reactant molecules, thereby accelerating the rate of the acid-base neutralization reaction, and plays an important role in increasing the reaction rate, optimizing the reaction conditions and promoting the dissolution of substances.

2. A multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 1, characterized in that: The gas collecting hood is arranged in the binding workshop near the pollution source to capture the exhaust gas.

3. A multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 1, characterized in that: The air duct is used to connect the air collecting hood and the pipeline of the closed treatment box for filtering the exhaust gas, and is used to transport the exhaust gas.

4. A multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 1, characterized in that: The water spray dust reduction device comprises a water storage tank, a water pump, a water pumping pipeline and a nozzle, and the nozzle is installed on the top of the inner wall of the closed treatment box.

5. A multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 1, characterized in that: The acidic reaction tank contains an acidic solution of hydrochloric acid, phosphoric acid and nitric acid.

6. A multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 1, characterized in that: The alkaline reaction tank contains a limestone alkaline solution.

7. A multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 1, characterized in that: The number of the reaction tank heating devices is two, and they are respectively arranged in the acidic reaction tank and the alkaline reaction tank.

8. The multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 1, characterized in that: The condensation and liquefaction device includes a cooling box, a cooling pipe, a collecting pipe, a semiconductor refrigeration plate, a water cooling head and a cooling block. One end of the cooling pipe is connected to the closed treatment box, and the other end of the cooling pipe passes through the cooling box and is connected to the VOC waste gas detection pipeline. The collecting pipe is fixedly connected to the lower surface of the end of the cooling pipe.

9. A multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 8, characterized in that: The cooling tube is used to receive hot steam generated by the acid-base reaction heating, the semiconductor refrigeration plate is used to cool the steam inside the cooling tube passing through the cooling box, so that the steam after the acid-base neutralization reaction is condensed into liquid, and the collecting tube is used to collect the condensed liquid.

10. A multi-stage filtration binding workshop VOC purification and recovery system as claimed in claim 1, characterized in that: The VOC detector is installed inside the VOC waste gas detection pipeline, and the VOC detector is used to detect the concentration of organic compounds in the gas after purification.

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