Digestion treatment device for organic waste gas

Abstract

The utility model discloses a digestion treatment device for organic waste gas. The device comprises an axial flow type induced draft fan, a condenser, an alkaline washing tower, a neutralizing tower, VOCS air purification equipment and a QBR biochemical reaction tank, the VOCS air purification equipment is provided with an air inlet and an air outlet, the QBR biochemical reaction tank is provided with a sewage inlet, an air outlet of the neutralizing tower is connected with the air inlet of the VOCS air purification equipment through a pipeline, and the air outlet of the neutralizing tower is connected with the air outlet of the VOCS air purification equipment through a pipeline. The alkaline washing tower is provided with an alkaline liquor input pipeline and a first sewage discharge pipeline, and the neutralizing tower is provided with a neutralizing liquor input pipeline and a second sewage discharge pipeline; the first sewage discharge pipeline and the second sewage discharge pipeline are gathered to form a total sewage discharge pipeline, and the total sewage discharge pipeline is connected with the sewage inlet. According to the organic waste gas treatment device, organic waste gas generated by various chemical plants can be fully treated, and sewage generated in the waste gas treatment process can be effectively recycled, so that a more complete organic waste gas treatment device is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a digestion and treatment device for organic waste gas. Background Art

[0002] Air pollution is one of the most prominent environmental problems in my country at present, and industrial waste gas is an important source of air pollutants. The discharge of a large amount of industrial waste gas into the atmosphere will inevitably reduce the quality of the atmospheric environment and bring serious harm to human health. The most difficult to deal with among industrial waste gases is organic waste gas. After entering the human body through the respiratory tract and skin, organic waste gas can cause temporary and permanent lesions in human respiratory, blood, liver and other systems and organs. In particular, benzopyrene polycyclic aromatic hydrocarbons can directly cause cancer in the human body, which has attracted great attention from humans. Various organic waste gases are generated in industrial production, mainly including various hydrocarbons, alcohols, aldehydes, acids, ketones and amines. These organic waste gases will cause air pollution, endanger human health, and also cause waste, so the treatment and purification of organic waste gases is imperative.

[0003] Entering the 21st century, with the development of social economy and the enhancement of people's environmental awareness, people have put forward higher requirements for environmental quality. At present, my country's environmental problems are still very prominent, which have seriously restricted economic development and the improvement of people's living standards. Among them, toxic organic matter has caused serious environmental pollution. This type of pollutant has the characteristics of large emission, wide pollution area and difficulty in degradation. Their pollution control has always been a key research topic for environmental workers.

[0004] In the existing technical solutions, for the treatment of organic waste gas, most of them adopt absorption method, adsorption method and incineration method. Among them, the adsorption method usually adopts activated carbon as adsorbent, but the regeneration cost of activated carbon is high, and the adsorption cost is high; the incineration method requires that the combustion must be complete, otherwise the intermediate products formed during the incineration process may be more dangerous than the original pollutants, but for some chemical plants, open flames are strictly prohibited, and combustion will bring inevitable safety hazards to the chemical plants; the absorption method generally adopts physical absorption, that is, the waste gas is introduced into the absorption liquid for purification, and after the absorption liquid is saturated, it is heated, analyzed, and condensed for recovery. This method is suitable for the treatment of large volume, low temperature, and low concentration waste gas, but it needs to be equipped with a heating analysis recovery device, the equipment is large in size, and the investment is high; now there is a more economical and safe method, which is to discharge the organic waste gas into the washing tower, which has obvious effects on industrial waste gas absorption and dissolution, chemical waste gas adsorption, oxidation and reduction, and acid-base neutralization, but the organic waste gas cannot be directly discharged after being treated by the washing tower, and it needs to form a complete organic waste gas treatment device with other equipment to form a complete and sufficient treatment of the organic waste gas.

[0005] For example, in a method for treating waste gas from an organosilicon workshop with application announcement number CN 115671997 A, the waste gas is collected through a gas collecting hood and then sent to an inorganic alkali spray tower, in which the waste gas is sprayed, the hydrochloric acid produced by hydrolysis is neutralized and dissolved, the mixed liquid produced after spraying is collected, the gas after the inorganic alkali spray treatment is sent to a water spray tower for cleaning, and the cleaned gas is sent to a chimney through a centrifugal fan for external discharge. The treatment device included in the treatment method is only applicable to the treatment of waste gas from organosilicon workshops, and cannot meet the treatment standards when dealing with organic waste gas produced by other chemical plants. The waste gas produced by other chemical plants has very complex components, and cannot meet the emission standards after simple treatment by spray cleaning.

[0006] For example, the application announcement number is 106377962 A, which is a comprehensive treatment device for industrial organic waste gas, including three treatment units: a washing tower, an integrated processor and an ozone catalytic oxidation tower. The washing tower is used to preliminarily remove particulate matter and suspended matter contained in the waste gas and neutralize acid and alkali substances. After the preliminary washing, all of them enter the integrated processor and the ozone catalytic oxidation tower for treatment. The integrated processor and the ozone catalytic oxidation tower are used to treat the insoluble gases in the waste gas. However, the wastewater generated after the washing tower still has recycling value. If it is discharged directly, it will not only fail to meet the emission standards, but also lose economic benefits and fail to meet environmental protection production requirements.

[0007] In order to solve the above technical problems, the utility model proposes a digestion and treatment device for organic waste gas. Summary of the invention

[0008] The purpose of the utility model is to overcome the shortcomings of the prior art and propose a digestion and treatment device for organic waste gas, which can fully treat the organic waste gas generated by various chemical plants and effectively recycle the sewage generated in the waste gas treatment process to form a more complete organic waste gas treatment device.

[0009] In order to achieve the above objectives, the utility model proposes the following technical solutions:

[0010] A digestion and treatment device for organic waste gas, comprising an axial flow induced draft fan, a condenser, an alkali washing tower, a neutralization tower, a VOCS air purification device and a QBR biochemical reaction tank;

[0011] The axial flow induced draft fan, condenser, alkali washing tower and neutralization tower are all provided with air inlet and air outlet; the VOCS air purification equipment is provided with air inlet and air outlet, and the QBR biochemical reaction tank is provided with a sewage inlet.

[0012] The air inlet of the condenser is connected to the air outlet of the axial flow induced draft fan through a pipeline; the air outlet of the condenser is connected to the air inlet of the alkali washing tower through a pipeline, the air outlet of the alkali washing tower is connected to the air inlet of the neutralization tower through a pipeline, the air outlet of the neutralization tower is connected to the air inlet of the VOCS air purification equipment through a pipeline, the alkali washing tower is provided with an alkali liquid input pipeline and a first sewage discharge pipeline, and the neutralization tower is provided with a neutralization liquid input pipeline and a second sewage discharge pipeline;

[0013] The first sewage discharge pipe and the second sewage discharge pipe are combined into a total sewage discharge pipe, and the total sewage discharge pipe is connected to the sewage inlet, so that the sewage generated after treatment in the alkali washing tower and the neutralization tower is discharged into the QBR biochemical reaction tank for sufficient treatment and recovery, and can be used as recycled water after being treated in the QBR biochemical reaction tank and meeting the standards.

[0014] Preferably, the alkali washing tower uses a sodium hydroxide solution with a pH value greater than 8.

[0015] Preferably, the neutralization tower uses a sodium bicarbonate solution.

[0016] Preferably, the alkali washing tower adopts a spray washing method.

[0017] Preferably, the neutralization tower adopts a spray washing method.

[0018] Preferably, a first induced draft fan is provided on the connecting pipe between the air outlet of the alkali washing tower and the air inlet of the neutralization tower to facilitate the introduction of the residual gas in the alkali washing tower into the neutralization tower.

[0019] Preferably, a second induced draft fan is provided on the connecting pipe between the air outlet of the neutralization tower and the air inlet of the VOCS air purification device, so as to introduce all the remaining gas in the neutralization tower into the VOCS air purification device and completely treat the gas.

[0020] The VOCS air purification equipment mentioned above is a technical equipment already available in the prior art, such as activated carbon adsorption equipment, ultraviolet disinfection equipment, electrochemical deodorization equipment, photocatalytic deodorization equipment, ion deodorization equipment, etc., which performs conventional treatment on the waste gas after alkali washing and neutralization, and can be discharged after meeting the standards. This is a conventional technology that technicians in this field can think of.

[0021] The QBR biochemical reaction pool mentioned above is a technical equipment already in the prior art. The QBR technology, i.e., the rapid bioreactor, is also an aerated biological oxidation pool. The function of the pool is to use the special microorganisms grown therein to rapidly and economically degrade most of the difficult-to-biodegrade and easily-biodegraded organic matter in the high-concentration toxic sewage that cannot be treated by the traditional activated sludge method under aerobic conditions. It is a biological pre-treatment process. Since the special microorganisms are separated and screened from an environment that has long lived in certain organic compounds containing high concentrations of toxicity, the biological toxicity of the sewage is reduced under the degradation action of microbial enzymes, the biodegradability of the sewage is improved, and favorable conditions are created for the subsequent treatment of high-concentration toxic organic sewage.

[0022] Special microbial flora live in an environment with high concentrations of toxic organic compounds for a long time. Under the degradation of their microbial enzymes, they can reduce the biological toxicity of industrial wastewater, improve its biodegradability, and create favorable conditions for its subsequent treatment. The QBR process has a volume load that is more than 10 times higher than the traditional activated sludge method, greatly reducing the treatment cost of high-concentration chemical wastewater. It can also greatly shorten the treatment process, and the one-time investment and treatment costs are less than the traditional costs.

[0023] This technology avoids high-temperature and high-pressure operation methods such as incineration and wet oxidation, and can be implemented at normal temperature and pressure, reducing potential risk factors, transferring pollutants, and not causing secondary pollution. Compared with traditional biological treatment systems, the startup time is greatly shortened, and normal operation can be achieved two to three days after implanting special microbial flora, while the traditional startup time takes one or two months; at the same time, the sludge sedimentation performance is improved, the sludge expansion is inhibited, and the stability of the sewage treatment system operation is greatly increased.

[0024] Specifically, the organic waste gas is introduced into the condenser through an axial flow induced draft fan, and after cooling to 30℃±5℃, it enters the alkali washing tower, where the alkali solution in the alkali washing tower is sprayed and washed to form a soluble organic salt solution. After being neutralized by alkaline in the neutralization tower, it is discharged into the QBR biochemical reaction pool for biochemical treatment and converted into recycled water after the treatment meets the standards.

[0025] The remaining gas after washing in the alkali washing tower is also discharged into the neutralization tower. The remaining gas after neutralization in the neutralization tower is transferred to the VOCS air purification equipment for centralized treatment and discharged after meeting the treatment standards.

[0026] In the above process, the organic waste gas is alkaline washed and neutralized, the formed soluble organic salt solution is biochemically treated, and the remaining gas enters the VOCS air purification equipment for purification treatment, which can achieve complete treatment of the organic waste gas and recycle the wastewater formed in the treatment process.

[0027] The beneficial effects of the utility model are:

[0028] The utility model performs alkali washing and neutralization on the organic waste gas, and then transfers the remaining waste gas to the VOCS air purification equipment for centralized treatment, and discharges it after the treatment meets the standards. The waste water generated by the alkali washing and neutralization is discharged into the QBR biochemical reaction pool for biochemical treatment, and is converted into recycled water after the treatment meets the standards, thereby achieving full treatment of the organic waste gas and also achieving the recovery and treatment of the sewage generated in the waste gas treatment process, thereby forming a more complete organic waste gas treatment device.

[0029] By adopting the above scheme, the utility model can fully treat the organic waste gas generated by various chemical plants, and effectively recycle the sewage generated in the waste gas treatment process, forming a more complete organic waste gas treatment device; at the same time, it has good safety performance, meets environmental protection requirements, is easy to operate, requires low investment, and has good effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is an overall flow chart of the utility model.

[0032] In the figure, 1-axial flow induced draft fan, 2-condenser, 3-alkali washing tower, 4-neutralization tower, 5-VOCS air purification equipment, 6-QBR biochemical reaction tank, 7-alkali solution input pipeline, 8-neutralization liquid input pipeline. Implementation

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] like Figure 1 As shown, a digestion and treatment device for organic waste gas includes an axial flow induced draft fan 1, a condenser 2, an alkali washing tower 3, a neutralization tower 4, a VOCS air purification device 5 and a QBR biochemical reaction tank 6;

[0038] The axial flow induced draft fan 1, condenser 2, alkali washing tower 3, and neutralization tower 4 are all provided with an air inlet and an air outlet; the VOCS air purification equipment 5 is provided with an air inlet and an air outlet, and the QBR biochemical reaction tank 6 is provided with a sewage inlet.

[0039] The air inlet of the condenser 2 is connected to the air outlet of the axial flow induced draft fan 1 through a pipeline; the air outlet of the condenser 2 is connected to the air inlet of the alkali washing tower 3 through a pipeline, the air outlet of the alkali washing tower 3 is connected to the air inlet of the neutralization tower 4 through a pipeline, the air outlet of the neutralization tower 4 is connected to the air inlet of the VOCS air purification device 5 through a pipeline, the alkali washing tower 3 is provided with an alkali liquid input pipeline 7 and a first sewage discharge pipeline, and the neutralization tower 4 is provided with a neutralization liquid input pipeline 8 and a second sewage discharge pipeline;

[0040] The first sewage discharge pipe and the second sewage discharge pipe are combined into a total sewage discharge pipe, and the total sewage discharge pipe is connected to the sewage inlet, so that the sewage generated after treatment in the alkali washing tower 3 and the neutralization tower 4 is discharged into the QBR biochemical reaction tank 6 for sufficient treatment and recovery, and can be used as recycled water after being treated and meeting the standards in the QBR biochemical reaction tank 6.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A digestion and treatment device for organic waste gas, comprising an axial flow induced draft fan, a condenser, an alkali washing tower, and a neutralization tower, wherein the axial flow induced draft fan, the condenser, the alkali washing tower, and the neutralization tower are all provided with an air inlet and an air outlet; the air inlet of the condenser is connected to the air outlet of the axial flow induced draft fan through a pipeline; the air outlet of the condenser is connected to the air inlet of the alkali washing tower through a pipeline, and the air outlet of the alkali washing tower is connected to the air inlet of the neutralization tower through a pipeline; characterized in that: It also includes VOCS air purification equipment and a QBR biochemical reaction pool. The VOCS air purification equipment is provided with an air inlet and an exhaust port, the QBR biochemical reaction pool is provided with a sewage inlet, the air outlet of the neutralization tower is connected to the air inlet of the VOCS air purification equipment through a pipeline, the alkali washing tower is provided with an alkali liquid input pipeline and a first sewage discharge pipeline, and the neutralization tower is provided with a neutralization liquid input pipeline and a second sewage discharge pipeline; the first sewage discharge pipeline and the second sewage discharge pipeline are combined into a total sewage discharge pipeline, and the total sewage discharge pipeline is connected to the sewage inlet.

2. The digestion and treatment device for organic waste gas according to claim 1 is characterized in that: The alkali washing tower uses a sodium hydroxide solution with a pH value greater than 8.

3. The digestion and treatment device for organic waste gas according to claim 1 is characterized in that: The neutralization tower uses sodium bicarbonate solution.

4. The digestion and treatment device for organic waste gas according to claim 1 is characterized in that: The alkali washing tower adopts a spray-type washing method.

5. The digestion and treatment device for organic waste gas according to claim 1 is characterized in that: The neutralization tower adopts a spray washing method.

6. The digestion and treatment device for organic waste gas according to claim 1 is characterized in that: A first induced draft fan is provided on the connecting pipeline between the air outlet of the alkali washing tower and the air inlet of the neutralization tower.

7. The digestion and treatment device for organic waste gas according to claim 1 is characterized in that: A second induced draft fan is provided on the connecting pipe between the air outlet of the neutralization tower and the air inlet of the VOCS air purification device.

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