Reclaimed rubber desulfurization waste gas negative pressure elution treatment system

Abstract

The utility model discloses a reclaimed rubber desulfurization waste gas negative pressure elution treatment system which comprises a desulfurization tank bottom closed bin, a primary washing spray tower, a tail gas induced draft fan, an activated carbon environment-friendly adsorption box, a light oxygen tail gas treatment device, a secondary multi-stage washing spray tower, a primary washing circulating pump and a secondary washing circulating pump which are connected through closed pipelines, the components jointly form a waste gas elution treatment system. According to the system, the induced draft fan is used for generating a negative pressure environment in part of pipelines, tail gas leakage is avoided, and the influence on the external environment is reduced to the maximum extent; meanwhile, multi-stage elution treatment is utilized, so that the waste gas treatment efficiency is improved, various harmful waste gases generated in the production process are fully removed, and the treated tail gas reaches the emission standard.

Description

Technical Field

[0001] The utility model relates to the field of waste gas treatment in the comprehensive utilization of waste resources industry, and in particular to a negative pressure elution treatment system for waste gas from regenerated rubber desulfurization. Background Art

[0002] Recycled rubber is a rubber that has a certain degree of plasticity and can be reused, which is made from the vulcanized scraps in the production of rubber products. As an industrial and domestic waste resource, its reuse is an environmentally friendly measure. It can not only recycle and reuse the waste rubber generated in industrial production and life, forming a sustainable development model for the industry, but also solve the problem of waste rubber damaging the environment. In the process of recycling recycled rubber waste, the treatment of desulfurization exhaust gas has always been a pain point in the industry and has always been the focus of research in the industry. Although the waste gas treatment process and equipment are constantly improving, there are still many problems.

[0003] The traditional waste gas treatment system directly condenses the high-temperature waste gas through a shell-and-tube heat exchanger or passes it into a water pool for condensation. The method is rough, the number of treatment stages is single, and there are many unsafe factors. The waste gas discharged from the desulfurization tank will generate instantaneous pressure, which is easy to cause waste gas leakage, and the discharge port design cannot guarantee complete closure. The existing technology (patent CN102233195A) is to set a flow limiting element at the outlet of the desulfurization pipe. Although it can ensure the stability of the gas flow, when the processing volume is too large, the particulate matter in the regenerated rubber may cause blockage through the orifice plate flow limiting element; the jet absorber set in the invention cannot completely remove part of the water-soluble and alkali-soluble waste gas, and cannot achieve the ideal removal effect; only setting activated carbon adsorption is also very inefficient in removing volatile compounds and odor components removed by oxidation reactions. Utility Model Content

[0004] In view of the above-mentioned technical problems in the related technology, the utility model proposes a negative pressure elution treatment system for regenerated rubber desulfurization waste gas, which can solve the above-mentioned problems.

[0005] In order to achieve the above technical purpose, the technical solution of the utility model is implemented as follows:

[0006] A negative pressure elution treatment system for waste gas from desulfurization of recycled rubber, comprising a closed bin at the bottom of a desulfurization tank, wherein the closed bin is located at the bottom of the desulfurization tank, an air outlet is provided at the bottom of the closed bin, the air outlet is connected to a primary water washing spray tower through a pipeline, the air outlet at the top of the primary water washing spray tower is connected to an exhaust gas induced draft fan through a pipeline, and the front end of the exhaust gas induced draft fan air intake port is a negative pressure environment; the air outlet at the bottom end on the other side of the exhaust gas induced draft fan is connected to an activated carbon environmental adsorption box through a pipeline; the air outlet of the activated carbon environmental adsorption box is connected to the air inlet of a photo-oxidation exhaust gas processor through a pipeline, the air outlet pipeline of the photo-oxidation exhaust gas processor is connected to a secondary multi-stage water washing spray tower, and an emptying pipeline is provided at the top of the secondary multi-stage water washing spray tower; the bottoms of the primary water washing spray tower and the secondary multi-stage water washing spray tower are both connected to a water washing circulation pump.

[0007] Furthermore, the bottom water outlet pipe of the primary water washing spray tower is connected to a primary water washing circulation pump, and the water outlet of the primary water washing circulation pump is connected to the spray water inlet pipe at the top of the primary water washing spray tower; the bottom water outlet pipe of the secondary multi-stage water washing spray tower is connected to a secondary water washing circulation pump, and the water outlet of the secondary water washing circulation pump is connected to the spray water inlet pipe at the top of the secondary multi-stage water washing spray tower.

[0008] Furthermore, the primary water-washing spray tower, the exhaust induced draft fan, the activated carbon environmentally friendly adsorption box, the photo-oxidation exhaust gas processor, and the secondary multi-stage water-washing spray tower are sequentially connected in series through pipelines.

[0009] Furthermore, the desulfurization tank bottom closed bin is located at the bottom of the desulfurization tank, and is sealed and connected to the desulfurization tank and the tail gas outlet pipe. The interior of the bin is a closed environment, and the tail gas outlet pipe is located on the side of the desulfurization tank bottom closed bin.

[0010] Furthermore, the upper part of the secondary multi-stage water washing spray tower is multi-stage spraying.

[0011] Beneficial effects:

[0012] 1. The waste gas negative pressure washing system provided by the utility model uses an induced draft fan to form negative pressure in the closed chamber at the bottom of the desulfurization tank, which can ensure that the waste gas does not leak out and all enters a water washing spray tower, thereby improving the workshop environment and waste gas cleaning efficiency.

[0013] 2. The waste gas negative pressure elution system provided by the utility model, each device is connected by a closed pipe between each other, and together they constitute a waste gas elution treatment system, which adopts multiple elution treatment technologies including negative pressure transportation, primary spray water washing, activated carbon adsorption treatment, photo-oxidation treatment, and secondary spray water washing treatment, so that the waste gas removal is more efficient and environmentally friendly.

[0014] 3. The waste gas negative pressure elution system provided by the utility model performs multi-stage treatment of waste gas in a closed environment, thereby minimizing the impact on the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] The present invention is further described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a diagram of the negative pressure elution treatment system for regenerated rubber desulfurization waste gas provided by the utility model.

[0018] The markings in the figure are as follows: 1. Desulfurization tank; 2. Closed warehouse at the bottom of desulfurization tank; 3. Primary water washing spray tower; 4. Exhaust gas induced draft fan; 5. Activated carbon environmental protection adsorption box; 6. Photo-oxygen exhaust gas processor; 7. Secondary multi-stage water washing spray tower; 8. Primary water washing circulation pump; 9. Secondary water washing circulation pump; 10. Check valve; 11. Shut-off valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0020] like Figure 1 As shown, the utility model discloses a system for eluting and treating waste gas generated in the production process of reclaimed rubber under negative pressure environment, including a closed bin 2 at the bottom of a desulfurization tank, a primary water washing spray tower 3, an exhaust gas induced draft fan 4, an activated carbon environmental adsorption box 5, a photo-oxidation exhaust gas processor 6, a secondary multi-stage water washing spray tower 7, a primary water washing circulation pump 8, and a secondary water washing circulation pump 9. The above-mentioned equipment is connected by a closed pipeline to jointly constitute a waste gas elution treatment system.

[0021] The desulfurization tank bottom closed warehouse 2 is located at the bottom of the desulfurization tank 1, and an air outlet is provided at the bottom of the desulfurization tank bottom closed warehouse 2, and the air outlet is connected to a primary water washing spray tower 3 through a pipeline, and the air outlet at the top of the primary water washing spray tower 3 is connected to an exhaust draft fan 4 through a pipeline, and the front end of the exhaust draft fan 4 air intake is a negative pressure environment; the air outlet at the bottom end of the other side of the exhaust draft fan 4 is connected to an activated carbon environmental protection adsorption box 5 through a pipeline; the air outlet of the activated carbon environmental protection adsorption box 5 is connected to the air inlet of the photo-oxidation exhaust gas processor 6 through a pipeline, and the air outlet pipeline of the photo-oxidation exhaust gas processor 6 is connected to a secondary multi-stage water washing spray tower 7, and an emptying pipeline is provided at the top of the secondary multi-stage water washing spray tower 7, and the exhaust gas after elution treatment is finally discharged outdoors at a height of 15m to meet the standards; the bottoms of the primary water washing spray tower 3 and the secondary multi-stage water washing spray tower 7 are both connected to a water washing circulation pump.

[0022] The bottom water outlet pipe of the above-mentioned primary water washing spray tower 3 is connected to a primary water washing circulation pump 8, and the water outlet of the primary water washing circulation pump 8 is connected to the spray water inlet pipe at the top of the primary water washing spray tower 3; the bottom water outlet pipe of the secondary multi-stage water washing spray tower 7 is connected to a secondary water washing circulation pump 9, and the water outlet of the secondary water washing circulation pump 9 is connected to the spray water inlet pipe at the top of the secondary multi-stage water washing spray tower 7.

[0023] The primary water washing spray tower 3, exhaust induced draft fan 4, activated carbon environmental adsorption box 5, photo-oxidation exhaust gas processor 6, and secondary multi-stage water washing spray tower 7 are connected in series in sequence through pipelines. The activated carbon environmental adsorption box 4 is in front of the photo-oxidation exhaust gas processor 5 to adsorb the exhaust gas after the initial water washing; the photo-oxidation exhaust gas processor 5 is behind the activated carbon environmental adsorption box 4 to oxidize the exhaust gas after the activated carbon adsorption, which can maximize the equipment utilization and elution efficiency. The equipment can also be connected in series to increase the number of washing treatment stages and improve the elution treatment effect.

[0024] The above-mentioned desulfurization tank bottom closed bin 2 is located at the bottom of the desulfurization tank 1, and is sealed and connected to the desulfurization tank 1 and the tail gas outlet pipe. The bin is a closed environment, which improves the sealing of the system. The tail gas outlet pipe is located on the side of the desulfurization tank bottom closed bin 2, which improves the transportation efficiency of the tail gas.

[0025] The upper part of the secondary multi-stage water washing spray tower 7 described above is multi-stage spraying, which can increase the contact surface between the exhaust gas and the spraying liquid and improve the tail gas washing effect.

[0026] The above pipeline is provided with a check valve 10 and a shut-off valve 11; the check valve 10 has only one flow direction, flowing along the direction of the air inlet, which can prevent the water in the spray tower from flowing back. The shut-off valve 11 has a wide range of uses and can be used to cut off gas, combustion air, cold air and flue gas. When the instrument detects a gas leak, the shut-off valve can quickly close the valve; at the same time, it can be centrally controlled and the valve can be closed remotely.

[0027] In specific use, the primary water washing circulation pump 8 and the secondary water washing circulation pump 9 are normally open circulation pumps, which are used to control the circulation process of the spray water of the primary multi-stage water washing spray tower 3 and the secondary multi-stage water washing spray tower 7 in the system.

[0028] When the equipment is in the internal circulation absorption and removal working mode, the induced draft fan 4, the primary water washing circulation pump 8, and the secondary water washing circulation pump 9 are in the on state. When the desulfurization tank is discharged, the pollutants such as particulate matter, hydrogen sulfide, toluene, xylene, total hydrocarbons, ammonia nitrogen, COD, etc. in the closed warehouse 2 at the bottom of the desulfurization tank first enter the primary water washing spray tower 3 through the pipeline for initial spray washing, the purpose of which is to remove most of the water-soluble components and cool the exhaust gas, thereby improving the removal efficiency of pollutants; the exhaust gas after preliminary cleaning and cooling is discharged from the air outlet above the top of the primary water washing spray tower 3, and enters the activated carbon environmental protection adsorption box 5 through the induced draft fan 4, after activated carbon adsorption, it is discharged through the activated carbon environmental protection adsorption box 5, and then enters the interior from the air inlet of the photo-oxidation exhaust gas processor 6 for oxidation treatment; after photo-oxidation treatment, it enters the interior of the secondary multi-stage water washing spray tower 8 from the lower inlet, and the air outlet is located above the tower body. After the second elution, the exhaust gas is transported to a height of 15m through the exhaust pipe for discharge. In this exhaust gas absorption and removal treatment system, the pollutants can be fully removed.

[0029] When the equipment is in standby mode, the induced draft fan 3, the primary water washing circulation pump 7, and the secondary water washing circulation pump are in a closed state. The desulfurization tank is in a working state, and the desulfurization tank does not need to be discharged at this time, and no exhaust gas is discharged from the desulfurization tank closed warehouse 1.

[0030] To sum up, when the tail gas in the regenerated rubber desulfurization tank is treated by this system, the induced draft fan is used to create a negative pressure environment, which avoids the leakage of tail gas and minimizes the impact on the external environment; at the same time, multi-stage elution treatment is used to improve the waste gas treatment efficiency, and various harmful waste gases generated in the production process are fully removed. The treated tail gas meets the emission standards. The utility model device is an environmentally friendly equipment.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A negative pressure elution treatment system for regenerated rubber desulfurization waste gas, characterized in that: The invention comprises a desulfurization tank bottom closed bin (2), the desulfurization tank bottom closed bin (2) is located at the bottom of the desulfurization tank (1), the bottom of the desulfurization tank bottom closed bin (2) is provided with an air outlet, the air outlet is connected to a primary water washing spray tower (3) through a pipeline, the top air outlet of the primary water washing spray tower (3) is connected to an exhaust induced draft fan (4) through a pipeline, the front end of the exhaust induced draft fan (4) is in a negative pressure environment; the bottom air outlet of the other side of the exhaust induced draft fan (4) is connected to an activated carbon environmental protection adsorption box (5) through a pipeline; the air outlet of the activated carbon environmental protection adsorption box (5) is connected to the air inlet of a photo-oxidation exhaust gas processor (6) through a pipeline, the air outlet pipeline of the photo-oxidation exhaust gas processor (6) is connected to a secondary multi-stage water washing spray tower (7), the top of the secondary multi-stage water washing spray tower (7) is provided with an emptying pipeline; the bottoms of the primary water washing spray tower (3) and the secondary multi-stage water washing spray tower (7) are both connected to a water washing circulation pump.

2. A negative pressure elution treatment system for reclaimed rubber desulfurization waste gas according to claim 1, characterized in that: The water outlet pipe at the bottom of the primary water washing spray tower (3) is connected to a primary water washing circulation pump (8), and the water outlet of the primary water washing circulation pump (8) is connected to the spray water inlet pipe at the top of the primary water washing spray tower (3); the water outlet pipe at the bottom of the secondary multi-stage water washing spray tower (7) is connected to a secondary water washing circulation pump (9), and the water outlet of the secondary water washing circulation pump (9) is connected to the spray water inlet pipe at the top of the secondary multi-stage water washing spray tower (7).

3. A negative pressure elution treatment system for regenerated rubber desulfurization waste gas according to claim 1, characterized in that: The primary water-washing spray tower (3), the exhaust induced draft fan (4), the activated carbon environmentally friendly adsorption box (5), the photo-oxidation exhaust gas processor (6), and the secondary multi-stage water-washing spray tower (7) are sequentially connected in series via pipelines.

4. A negative pressure elution treatment system for regenerated rubber desulfurization waste gas according to claim 1, characterized in that: The desulfurization tank bottom closed chamber (2) is located at the bottom of the desulfurization tank (1), and is sealedly connected to the desulfurization tank (1) and the tail gas outlet pipe. The interior of the chamber is a closed environment, and the tail gas outlet pipe is located on the side of the desulfurization tank bottom closed chamber (2).

5. A negative pressure elution treatment system for regenerated rubber desulfurization waste gas according to claim 1, characterized in that: The upper part of the secondary multi-stage water washing spray tower (7) is a multi-stage spray tower.

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