High-recycling pulping process waste gas supergravity cleaning treatment process

Abstract

The invention discloses a waste gas supergravity cleaning treatment process for a highly-recycled pulping process. The waste gas supergravity cleaning treatment process comprises the following steps: step 1, collecting waste gas; step 2, solid-liquid separation; step 3, performing supergravity primary treatment; step 4, optimizing the absorption liquid; step 5, carrying out supergravity secondary treatment; step 6, carrying out gas-liquid separation; 7, clean discharging is conducted; step 8, data analysis; according to the invention, the collected waste gas is pretreated through the spraying system containing the filler layer, so that water molecules and other solid molecules can be effectively separated under the condition that the components of the waste gas collected by the pulping system are complex; the waste gas is treated by adopting supergravity electrolysis twice, so that pollutant molecules are transferred from a gas phase to a liquid phase, and the gas purification effect is improved; by means of the gas-liquid separation technology, absorption liquid in mixed gas is separated out and recycled through the circulating pump, waste gas is discharged cleanly through the draught fan, clean, efficient and harmless treatment of the waste gas is guaranteed, and meanwhile the treatment cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment in a highly resource-efficient pulping process, and in particular to a high-gravity cleaning treatment process for waste gas in a highly resource-efficient pulping process. Background Art

[0002] The papermaking industry is an important basic raw material industry with the characteristics of sustainable development. It plays an important role in various fields. In order to save raw material costs and meet the full utilization of resources, papermaking enterprises fully recycle and reuse sludge, white water and other materials. As a result, the pulping system needs to add a large amount of chemical auxiliary materials to maintain product quality due to the repeated recycling of recycled raw materials. A large amount of unpleasant odors are generated in the pulping process. These unorganized unpleasant odors worsen the production environment of the factory and are not conducive to the physical and mental health of employees. These odors must be efficiently and harmlessly treated, but the existing waste gas treatment methods still have shortcomings;

[0003] First, the existing waste gas treatment methods cannot effectively separate water molecules and other solid molecules when faced with the complex composition of waste gas collected by the pulping system; second, the existing waste gas treatment methods are difficult to complete the transfer of pollutant molecules from the gas phase to the liquid phase, affecting the effectiveness of gas purification; third, the existing waste gas treatment methods, while ensuring the clean, efficient and harmless treatment of waste gas, will increase the corresponding treatment costs; therefore, it is necessary to design a highly resource-efficient ultra-gravity cleaning treatment process for waste gas from pulping processes. Summary of the invention

[0004] The purpose of the present invention is to provide a high-resource pulping process waste gas ultra-gravity cleaning treatment process to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a highly resource-saving pulping process waste gas ultra-gravity clean treatment process, comprising the following steps: step one, waste gas collection; step two, solid-liquid separation; step three, ultra-gravity primary treatment; step four, absorption liquid optimization; step five, ultra-gravity secondary treatment; step six, gas-liquid separation; step seven, clean discharge; step eight, data analysis;

[0006] In the above step 1, the waste gas generated by the pulping system is collected centrally;

[0007] In the above step 2, the collected waste gas is pre-treated by a spray system containing a packing layer;

[0008] In the above step 3, the pre-treated waste gas is sent to the super gravity primary absorption system for treatment;

[0009] In the above step 4, an optimized absorption liquid is selected in the hypergravity system;

[0010] In the above step 5, the waste gas is subjected to secondary super gravity treatment;

[0011] In the above step 6, the absorption liquid in the mixed gas is separated and recycled;

[0012] In the above step 7, the treated qualified waste gas is discharged;

[0013] In the above step eight, the data of exhaust gas is detected.

[0014] As a further technical solution of the present invention, in the step one, an exhaust gas collection system is composed of an exhaust gas collection hood, a pipeline system, a fan and a control system, wherein the design of the exhaust gas collection hood needs to adopt high-efficiency capture technology to ensure that the exhaust gas can be captured comprehensively and efficiently, which includes a reasonable selection of the collection hood shape, size and material, as well as an appropriate capture speed and capture angle. During the exhaust gas collection process, negative pressure control technology needs to be adopted to ensure that the exhaust gas can be continuously and stably transported to subsequent treatment equipment, which includes reasonable fan selection, and resistance calculation and adjustment of the pipeline system.

[0015] As a further technical solution of the present invention, in the step 2, the collected exhaust gas is pretreated by a spray system containing a packing layer. The spray system sprays the spray liquid evenly in the exhaust gas through a high-pressure nozzle to form fine droplets, which are in full contact with the solid particles and moisture in the exhaust gas. The spray liquid should have good solubility, reactivity and stability, and be able to efficiently remove target pollutants in the exhaust gas. The packing layer increases the contact area and promotes the separation of the droplets from impurities in the exhaust gas.

[0016] As a further technical solution of the present invention, in the step three, the pretreated waste gas is sent to a supergravity primary absorption system, which uses a high-speed rotating centrifugal force field to form a gravitational acceleration of more than 100G, so that the waste gas and the absorption liquid collide and contact at the molecular level. In this process, the pollutant molecules in the waste gas are forcibly pushed to the surface of the absorption liquid, which greatly increases the mass transfer rate and efficiency between the pollutants and the absorption liquid. At the same time, by setting an electrolysis unit in the supergravity equipment and applying voltage to cause the electrolyte in the absorption liquid to undergo redox reactions, the active substances produced by these reactions, such as hydroxyl radicals and ozone, have strong oxidizing ability, and the absorption liquid can more effectively capture and absorb odorous substances and harmful substances in the waste gas.

[0017] As a further technical solution of the present invention, in the step four, in the supergravity primary absorption system, it is necessary to select a suitable absorption liquid. The absorption liquid should have good solubility, reactivity and stability, and be able to efficiently remove target pollutants in the exhaust gas. At the same time, by continuously optimizing the formula and concentration of the absorption liquid, the treatment efficiency can be further improved.

[0018] As a further technical solution of the present invention, in the step five, the waste gas after the super-gravity primary absorption treatment is subjected to secondary treatment to ensure that the emission meets the standards. In the super-gravity secondary absorption system, the waste gas is further purified by adjusting the gravity multiple and selecting a suitable absorption liquid. The increase in the gravity multiple can enhance the mass transfer power between the waste gas and the absorption liquid, making the pollutant molecules in the waste gas easier to be captured and removed by the absorption liquid. At the same time, the optimization of the gravity multiple can also improve the utilization efficiency of the absorption liquid. The selected absorption liquid still needs to have good solubility, reactivity and stability.

[0019] As a further technical solution of the present invention, in step six, after being treated in the supergravity secondary absorption system, the exhaust gas contains a large amount of aqueous absorption liquid. Through gas-liquid separation technology, which is a method combining centrifugal separation with special fillers, relying on the density difference and flow characteristics between gas and liquid to achieve separation, so as to improve the separation efficiency, the absorption liquid in the mixed gas is separated and recycled through a circulating pump. During the recycling process, it is necessary to pay attention to the changes in the concentration and pH value parameters of the absorption liquid to ensure that it always maintains good absorption performance.

[0020] As a further technical solution of the present invention, in step seven, the exhaust gas that has been deeply treated by the resource-based ultra-gravity technology is cleanly discharged through a fan, and online monitoring equipment is set at the discharge port. These devices use highly sensitive sensors and analyzers to accurately measure the content of various pollutants in the exhaust gas. Through online monitoring, any abnormal situation can be discovered and handled in time to ensure stable and standard exhaust gas emissions.

[0021] As a further technical solution of the present invention, in the step eight, online monitoring data is collected and processed, and the data is analyzed and evaluated. The collected online monitoring data includes exhaust gas composition, concentration, and flow information. By statistically analyzing these data, the operating status and effect of the exhaust gas treatment process can be understood. According to the analysis results, the exhaust gas treatment process flow and parameters are adjusted in time to optimize the treatment effect and improve the treatment efficiency, including adjusting the formula and concentration of the absorption liquid, optimizing the gravity multiple, and improving the gas-liquid separation technology. Through continuous feedback and adjustment, the exhaust gas treatment efficiency and treatment effect can be further improved to ensure clean, efficient, and harmless treatment of the exhaust gas.

[0022] As a further technical solution of the present invention, in step eight, the exhaust gas discharged from the exhaust port must meet the following technical indicators: the odor concentration (dimensionless) of the exhaust gas is less than 100, the ammonia concentration in the exhaust gas is less than 2.0 kg / h, and the ammonia hydrogen sulfide concentration in the exhaust gas is less than 0.3 kg / h. The exhaust gas emission standard is much better than the 25-meter emission standard of the "Emission Standard of Odor Pollutants GB 14554-1993".

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the highly resource-efficient pulping process waste gas ultra-gravity cleaning treatment process pre-treats the collected waste gas through a spray system containing a packing layer, and the spray system evenly sprays the spray liquid in the waste gas through a high-pressure nozzle to form fine droplets, which are fully in contact with the solid particles and water in the waste gas. The spray liquid should have good solubility, reactivity and stability, and can efficiently remove target pollutants in the waste gas. The packing layer increases the contact area and promotes the separation of droplets from impurities in the waste gas. The spray system containing the packing layer performs impurity removal and purification pre-treatment, and can effectively separate water molecules and other solid molecules when the waste gas collected by the pulping system has complex components; The waste gas is treated by two ultra-gravity electrolysis processes. In a high-speed rotating centrifugal field, a gravitational acceleration of more than 100G is formed, which causes molecular-level collisions between the exhaust gas and the absorption liquid, completing the transfer of pollutant molecules from the gas phase to the liquid phase, thereby improving the efficiency of gas purification. After being treated in the ultra-gravity secondary absorption system, the waste gas contains a large amount of aqueous absorption liquid. Through gas-liquid separation technology, which combines centrifugal separation with special fillers, it relies on the density difference and flow characteristics between gas and liquid to achieve separation, so as to improve the separation efficiency, separate the absorption liquid from the mixed gas, and recycle it through a circulating pump. The waste gas is discharged through a clean fan, which ensures the clean, efficient and harmless treatment of the waste gas while reducing the treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0026] Please see attached Figure 1 , an embodiment provided by the present invention: a highly resource-recoverable pulping process waste gas ultra-gravity clean treatment process, comprising the following steps: step one, waste gas collection; step two, solid-liquid separation; step three, ultra-gravity primary treatment; step four, absorption liquid optimization; step five, ultra-gravity secondary treatment; step six, gas-liquid separation; step seven, clean discharge; step eight, data analysis;

[0027] In the above step 1, the exhaust gas collection system is composed of an exhaust gas collection hood, a pipeline system, a fan and a control system. The design of the exhaust gas collection hood needs to adopt high-efficiency capture technology to ensure that the exhaust gas can be fully and efficiently captured, which includes reasonable collection hood shape, size and material selection, as well as appropriate capture speed and capture angle. In the exhaust gas collection process, negative pressure control technology needs to be used to ensure that the exhaust gas can be continuously and stably transported to the subsequent treatment equipment, which includes reasonable fan selection, pipe system resistance calculation and adjustment;

[0028] In the above step 2, the collected waste gas is pre-treated by a spray system containing a packing layer. The spray system sprays the spray liquid evenly in the waste gas through a high-pressure nozzle to form fine droplets, which are fully in contact with the solid particles and water in the waste gas. The spray liquid should have good solubility, reactivity and stability, and can efficiently remove the target pollutants in the waste gas. The packing layer increases the contact area and promotes the separation of the droplets from the impurities in the waste gas.

[0029] In the above step 3, the pretreated waste gas is sent to the supergravity primary absorption system, which uses a high-speed rotating centrifugal force field to form a gravitational acceleration of more than 100G, so that the waste gas and the absorption liquid collide and contact at the molecular level. In this process, the pollutant molecules in the waste gas are forcibly pushed to the surface of the absorption liquid, which greatly increases the mass transfer rate and efficiency between the pollutants and the absorption liquid. At the same time, by setting an electrolysis unit in the supergravity equipment, the electrolyte in the absorption liquid undergoes a redox reaction by applying a voltage. The active substances produced by these reactions, such as hydroxyl radicals and ozone, have strong oxidizing ability, and the absorption liquid can more effectively capture and absorb odorous substances and harmful substances in the waste gas;

[0030] In the above step 4, in the supergravity primary absorption system, it is necessary to select a suitable absorption liquid, which should have good solubility, reactivity and stability, and be able to efficiently remove the target pollutants in the exhaust gas. At the same time, by continuously optimizing the formula and concentration of the absorption liquid, the treatment efficiency can be further improved;

[0031] In the above step 5, the waste gas after the super gravity primary absorption treatment is subjected to secondary treatment to ensure that the emission meets the standard. In the super gravity secondary absorption system, the waste gas is further purified by adjusting the gravity multiple and selecting a suitable absorption liquid. The increase in the gravity multiple can enhance the mass transfer power between the waste gas and the absorption liquid, making it easier for the pollutant molecules in the waste gas to be captured and removed by the absorption liquid. At the same time, the optimization of the gravity multiple can also improve the utilization efficiency of the absorption liquid. The selected absorption liquid still needs to have good solubility, reactivity and stability.

[0032] In the above step six, after being treated by the supergravity secondary absorption system, the waste gas contains a large amount of aqueous absorption liquid. Through the gas-liquid separation technology, which is a method combining centrifugal separation with special fillers, relying on the density difference and flow characteristics between gas and liquid to achieve separation, the absorption liquid in the mixed gas is separated and recycled through a circulation pump. During the recycling process, it is necessary to pay attention to the changes in the concentration and pH value parameters of the absorption liquid to ensure that it always maintains good absorption performance;

[0033] In the above step 7, the waste gas after deep treatment by resource recovery super gravity technology is discharged cleanly through a fan, and online monitoring equipment is set at the discharge port. These devices use highly sensitive sensors and analyzers to accurately measure the content of various pollutants in the waste gas. Through online monitoring, any abnormal situation can be discovered and handled in time to ensure stable and standard emission of waste gas;

[0034] In the above step eight, online monitoring data is collected and processed, and the data is analyzed and evaluated. The collected online monitoring data includes exhaust gas composition, concentration, and flow information. By statistically analyzing these data, the operating status and effect of the exhaust gas treatment process can be understood. According to the analysis results, the exhaust gas treatment process flow and parameters are adjusted in time to optimize the treatment effect and improve the treatment efficiency, including adjusting the formula and concentration of the absorption liquid, optimizing the gravity multiple, and improving the gas-liquid separation technology. Through continuous feedback and adjustment, the exhaust gas treatment efficiency and treatment effect can be further improved to ensure the clean, efficient and harmless treatment of the exhaust gas. The exhaust gas discharged from the discharge port must meet the following technical indicators: the odor concentration (dimensionless) of the exhaust gas is less than 100, the ammonia concentration in the exhaust gas is less than 2.0kg / h, and the ammonia hydrogen sulfide concentration in the exhaust gas is less than 0.3kg / h. The exhaust gas emission standard is much better than the 25-meter emission standard of the "Emission Standard of Odor Pollutants GB 14554-1993".

[0035] Working principle: When in use, the collected waste gas is pre-treated through a spray system containing a packing layer. The spray system evenly sprays the spray liquid in the waste gas through a high-pressure nozzle to form fine droplets, which are fully in contact with the solid particles and water in the waste gas. The spray liquid should have good solubility, reactivity and stability, and can effectively remove the target pollutants in the waste gas. The packing layer increases the contact area and promotes the separation of droplets from impurities in the waste gas. The spray system containing a packing layer is used for impurity removal and purification pre-treatment, which can effectively separate water molecules and other solid molecules when the waste gas collected in the pulping system has complex components; the waste gas is treated by two supergravity electrolysis processes at high speed. In the rotating centrifugal field, a gravitational acceleration of more than 100G is formed, which causes molecular-level collisions between the exhaust gas and the absorption liquid, completing the transfer of pollutant molecules from the gas phase to the liquid phase, thereby improving the efficiency of gas purification. After being treated in the ultra-gravity secondary absorption system, the exhaust gas contains a large amount of aqueous absorption liquid. Through gas-liquid separation technology, which combines centrifugal separation with special fillers, it relies on the density difference and flow characteristics between gas and liquid to achieve separation, so as to improve the separation efficiency, separate the absorption liquid from the mixed gas, and recycle it through a circulating pump. The exhaust gas is discharged through a clean fan, which ensures the clean, efficient and harmless treatment of the exhaust gas while reducing the treatment cost.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A highly resource-efficient pulping process waste gas ultra-gravity cleaning treatment process, comprising the following steps: Step 1, waste gas collection; Step 2, solid-liquid separation; Step 3, high gravity primary treatment; Step 4, absorption liquid optimization; Step 5, high gravity secondary treatment; Step 6, gas-liquid separation; Step 7, clean discharge; Step 8, data analysis; It is characterized by: In the above step 1, the waste gas generated by the pulping system is collected centrally; In the above step 2, the collected waste gas is pre-treated by a spray system containing a packing layer; In the above step 3, the pre-treated waste gas is sent to the super gravity primary absorption system for treatment; In the above step 4, an optimized absorption liquid is selected in the hypergravity system; In the above step 5, the waste gas is subjected to secondary super gravity treatment; In the above step 6, the absorption liquid in the mixed gas is separated and recycled; In the above step 7, the treated qualified waste gas is discharged; In the above step eight, the data of exhaust gas is detected.

2. According to claim 1, a high-resource pulping process waste gas ultra-gravity cleaning treatment process is characterized by: In the step one, an exhaust gas collection system is composed of an exhaust gas collection hood, a pipeline system, a fan and a control system, wherein the design of the exhaust gas collection hood needs to adopt high-efficiency capture technology to ensure that the exhaust gas can be captured comprehensively and efficiently, which includes reasonable selection of the collection hood shape, size and material, as well as appropriate capture speed and capture angle. During the exhaust gas collection process, negative pressure control technology needs to be adopted to ensure that the exhaust gas can be continuously and stably transported to subsequent treatment equipment, which includes reasonable fan selection, and resistance calculation and adjustment of the pipeline system.

3. The high-resource pulping process waste gas ultra-gravity cleaning treatment process according to claim 1 is characterized by: In the step 2, the collected exhaust gas is pretreated by a spray system containing a packing layer. The spray system sprays the spray liquid evenly in the exhaust gas through a high-pressure nozzle to form fine droplets, which are in full contact with the solid particles and moisture in the exhaust gas. The spray liquid should have good solubility, reactivity and stability, and be able to efficiently remove target pollutants in the exhaust gas. The packing layer increases the contact area and promotes the separation of the droplets from impurities in the exhaust gas.

4. The high-resource pulping process waste gas ultra-gravity cleaning treatment process according to claim 1 is characterized by: In the step three, the pretreated waste gas is sent to the supergravity primary absorption system, which uses a high-speed rotating centrifugal force field to form a gravitational acceleration of more than 100G, so that the waste gas and the absorption liquid collide and contact at the molecular level. In this process, the pollutant molecules in the waste gas are forcibly pushed to the surface of the absorption liquid, which greatly increases the mass transfer rate and efficiency between the pollutants and the absorption liquid. At the same time, by setting an electrolysis unit in the supergravity equipment and applying voltage to cause the electrolyte in the absorption liquid to undergo redox reactions, the active substances produced by these reactions, such as hydroxyl free radicals and ozone, have strong oxidizing ability, and the absorption liquid can more effectively capture and absorb odorous substances and harmful substances in the waste gas.

5. The high-resource pulping process waste gas ultra-gravity cleaning treatment process according to claim 1 is characterized by: In the step 4, in the supergravity primary absorption system, it is necessary to select a suitable absorption liquid. The absorption liquid should have good solubility, reactivity and stability, and be able to efficiently remove target pollutants in the exhaust gas. At the same time, the treatment efficiency can be further improved by continuously optimizing the formula and concentration of the absorption liquid.

6. The high-resource pulping process waste gas ultra-gravity cleaning treatment process according to claim 1 is characterized by: In the step five, the waste gas after the super-gravity primary absorption treatment is subjected to secondary treatment to ensure that the emission meets the standards. In the super-gravity secondary absorption system, the waste gas is further purified by adjusting the gravity multiple and selecting a suitable absorption liquid. The increase in the gravity multiple can enhance the mass transfer power between the waste gas and the absorption liquid, making it easier for the pollutant molecules in the waste gas to be captured and removed by the absorption liquid. At the same time, the optimization of the gravity multiple can also improve the utilization efficiency of the absorption liquid. The selected absorption liquid still needs to have good solubility, reactivity and stability.

7. The high-resource pulping process waste gas ultra-gravity cleaning treatment process according to claim 1 is characterized by: In step six, after being treated by the supergravity secondary absorption system, the exhaust gas contains a large amount of aqueous absorption liquid. The gas-liquid separation technology is a method that combines centrifugal separation with special fillers, relying on the density difference and flow characteristics between gas and liquid to achieve separation, so as to improve the separation efficiency, separate the absorption liquid from the mixed gas, and recycle it through a circulation pump. During the recycling process, it is necessary to pay attention to the changes in the concentration and pH value parameters of the absorption liquid to ensure that it always maintains good absorption performance.

8. The high-resource pulping process waste gas ultra-gravity cleaning treatment process according to claim 1 is characterized by: In step seven, the exhaust gas that has been deeply treated by the resource-based ultra-gravity technology is cleanly discharged through a fan, and online monitoring equipment is set at the discharge port. These devices use highly sensitive sensors and analyzers to accurately measure the content of various pollutants in the exhaust gas. Through online monitoring, any abnormal situation can be discovered and handled in time to ensure that the exhaust gas is stably discharged and meets the standards.

9. The high-resource pulping process waste gas ultra-gravity cleaning treatment process according to claim 1 is characterized by: In the step eight, online monitoring data is collected and processed, and the data is analyzed and evaluated. The collected online monitoring data includes exhaust gas composition, concentration, and flow information. By statistically analyzing these data, the operating status and effect of the exhaust gas treatment process can be understood. According to the analysis results, the exhaust gas treatment process flow and parameters are adjusted in time to optimize the treatment effect and improve the treatment efficiency, including adjusting the formula and concentration of the absorption liquid, optimizing the gravity multiple, and improving the gas-liquid separation technology. Through continuous feedback and adjustment, the exhaust gas treatment efficiency and treatment effect can be further improved to ensure the clean, efficient, and harmless treatment of the exhaust gas.

10. The high-resource pulping process waste gas ultra-gravity cleaning treatment process according to claim 9, characterized in that: In the step eight, the exhaust gas discharged from the discharge port must meet the following technical indicators: the odor concentration (dimensionless) of the exhaust gas is less than 100, the ammonia concentration in the exhaust gas is less than 2.0 kg / h, and the ammonia hydrogen sulfide concentration in the exhaust gas is less than 0.3 kg / h. The exhaust gas emission standard is much better than the 25-meter emission standard of the "Emission Standard of Odor Pollutants GB 14554-1993".

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