An injection type dual medium low temperature plasma deodorization device

Abstract

The utility model discloses a kind of injection type double medium low temperature plasma deodorization equipment in the field of odor treatment technology, including odor gas intake device, double medium plasma generator, air blower, wind pipe cavity and washing tower, the output end of the odor gas intake device is communicated with the air inlet of wind pipe cavity, two double medium low temperature plasma modules are built-in in the double medium plasma generator, the double medium low temperature plasma module is used to ionize air and generate high activity plasma, the output end of the double medium plasma generator is communicated with the input end of air blower, the output end of air blower is communicated with the air inlet two of wind pipe cavity, the wind pipe cavity provides fusion space for the mixing of plasma and odor, the air outlet of wind pipe cavity is communicated with the air inlet of washing tower, the washing tower is used to carry out depth purification to the odor after pretreatment. The utility model can reduce the dosage of module, and realize the sufficient mixing of odor and plasma by wind pipe cavity.

Description

Technical Field

[0001] This utility model relates to the field of odor treatment technology, and in particular to an injection-type dual-medium low-temperature plasma deodorization device. Background Technology

[0002] In the field of odor gas treatment, low-temperature plasma technology is widely used due to its efficient and rapid oxidation and decomposition capabilities. Traditional mainstream processes often adopt a "direct-flow" multi-module plasma reactor series scrubbing tower treatment mode, in which odorous gas is introduced by a fan and directly passes through a reaction chamber containing multiple parallel or series-arranged low-temperature plasma modules for preliminary oxidation and decomposition, and then enters the scrubbing tower for deep absorption and purification.

[0003] To meet the demands of high-volume airflow treatment and ensure a certain removal efficiency, traditional designs often require stacking or paralleling a large number of plasma modules to expand processing capacity. For example, to achieve a deodorization requirement of 60,000 m³ / h, a single dual-media low-temperature plasma module can handle 3,000 m³ / h of airflow. Traditional processes would require 20 modules to directly treat all the odorous gases to meet the requirements. However, this approach has several drawbacks: the large number of plasma modules leads to high initial investment costs; multiple modules occupy significant space, making them unsuitable for space-constrained environments; and the direct passage of odorous gases through multiple plasma modules can result in uneven airflow distribution, affecting the stability of pretreatment and consequently reducing the efficiency of the subsequent scrubbing tower. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an injection-type dual-medium low-temperature plasma deodorization device that reduces the number of modules and lowers overall costs while ensuring treatment effectiveness.

[0005] The purpose of this utility model is achieved as follows: An injection-type dual-medium low-temperature plasma deodorization device includes an odor inlet device, a dual-medium plasma generator, a blower, a duct cavity, and a scrubbing tower. The output end of the odor inlet device is connected to the air inlet of the duct cavity. The dual-medium plasma generator has two built-in dual-medium low-temperature plasma modules, which are used to ionize air to generate highly active plasma. The output end of the dual-medium plasma generator is connected to the input end of the blower. The output end of the blower is connected to the air inlet of the duct cavity. The duct cavity provides a fusion space for the mixing of plasma and odor. The air outlet of the duct cavity is connected to the air inlet of the scrubbing tower. The scrubbing tower is used to deeply purify the pre-treated odor.

[0006] In use, the odorous gas enters the duct cavity through the air inlet one via the air intake device. The dual-medium plasma generator ionizes the air through two built-in low-temperature plasma modules, generating highly active plasma containing high-energy electrons and free radicals. After being pressurized by the blower, the plasma is injected into the duct cavity through the air inlet two. Inside the cavity, the original odorous gas and the plasma achieve full mixing and oxidation reaction through forced convection (residence time not less than 1 second). The plasma decomposes large odorous molecules such as sulfides, amines, and VOCs into small harmless molecules. The pretreated gas enters the scrubbing tower from the duct cavity outlet, where it is sprayed and absorbed to remove the remaining soluble components and intermediate products, ultimately achieving emission standards.

[0007] Compared with existing technologies, the advantages of this invention are as follows: It reduces the number of dual-medium plasma modules in the traditional process from 20 to 2, with the module usage only 1 / 10 of the original scheme, significantly reducing initial equipment investment; operating energy consumption is simultaneously reduced to 1 / 10 of the original scheme, resulting in substantial savings in electricity costs over long-term operation and a clear overall cost advantage; the cross-sectional area of ​​the duct cavity can be designed based on the total air volume of the odorous gas to be treated (60,000 m³ / h) and ensuring a gas residence time >1 second, ensuring that the airflow velocity meets the fusion requirements, and the pretreatment efficiency is equal to or even better than that of traditional processes; the equipment occupies a small area, making it suitable for station scenarios with limited space; it can adapt to different deodorization needs by simply adjusting the cross-sectional area of ​​the duct cavity, exhibiting strong versatility; a spray device can be added inside the duct cavity to optimize the deodorization effect; the fewer modules significantly reduce the failure rate, greatly reducing the workload of inspection and replacement, and lowering maintenance costs.

[0008] As a further improvement of this utility model, the air volume processed by a single dual-medium low-temperature plasma module is 3000 m³ / h.

[0009] As a further improvement of this utility model, the odor inlet device includes an odor inlet pipe and an exhaust fan. The air inlet of the exhaust fan is connected to the odor inlet pipe, and the air outlet of the exhaust fan is connected to the air inlet of the duct cavity.

[0010] As a further improvement of this utility model, the air duct cavity is equipped with multiple guide plates and straightening grids, and check valves are respectively provided for air inlet one and air inlet two.

[0011] As a further improvement of this utility model, the scrubbing tower includes an air outlet at the top of the tower, a water tank at the bottom of the tower, and multiple layers of Raschig ring packing spaced apart along the height of the tower. The water tank is connected to the main spray pipe via a circulating pump. The main spray pipe is connected to several spray branch pipes. The spray branch pipes are located between two adjacent layers of Raschig ring packing and are connected to several spray heads spaced apart along their own length.

[0012] As a further improvement of this utility model, a water inlet is provided on the outward side of the water tank, and a drain outlet is provided at the bottom of the washing tower. Both the water inlet and the drain outlet are equipped with valves. The water tank has a built-in liquid level sensor, and the signal output terminal of the liquid level sensor is linked to the control system of the valve.

[0013] As a further improvement of this utility model, a maintenance ladder is provided on the outside of the spray tower, and a maintenance manhole is provided on the top of the spray tower, with a maintenance door connected to the maintenance manhole. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a structural diagram of the present invention.

[0016] Figure 2 This is a side view of the induced draft fan and the forced draft fan in this utility model.

[0017] Figure 3 This is a front view of the washing tower in this utility model.

[0018] Figure 4 This is a top view of the washing tower in this utility model.

[0019] Among them, 1 is the odor inlet device, 101 is the odor inlet pipe, 102 is the induced draft fan, 2 is the dual-medium plasma generator, 3 is the blower, 4 is the duct cavity, 401 is the first air inlet, 402 is the second air inlet, 403 is the air outlet, 5 is the scrubbing tower, 501 is the air outlet, 502 is the water tank, 503 is the Raschig ring packing, 504 is the circulating pump, 505 is the main spray pipe, 506 is the water supply port, 507 is the drain port, 508 is the air inlet, 509 is the maintenance ladder, and 510 is the maintenance manhole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1The illustrated injection-type dual-medium low-temperature plasma deodorization device includes an odor inlet device 1, a dual-medium plasma generator 2, a blower 3, a duct cavity 4, and a scrubbing tower 5. The output end of the odor inlet device 1 is connected to the air inlet 401 of the duct cavity 4. The dual-medium plasma generator 2 has two built-in dual-medium low-temperature plasma modules, which are used to ionize air to generate highly active plasma. The air volume handled by a single dual-medium low-temperature plasma module is 3000 m³ / h. The output end of the dual-medium plasma generator 2 is connected to the input end of the blower 3. The output end of the blower 3 is connected to the air inlet 402 of the duct cavity 4 via the jet pipe. The duct cavity 4 provides a fusion space for the mixing of plasma and odor. The jet pipe, as an acceleration channel for plasma airflow, can convert the highly active plasma output by the blower 3 into a high-speed jet, which is injected into the duct cavity 4 with directional kinetic energy, actively impacting and breaking the static or laminar state of the original odor, and stimulating turbulent mixing in the cavity. The air outlet 403 of the duct cavity 4 is connected to the air inlet 508 of the scrubbing tower 5. The scrubbing tower 5 is used to deeply purify the pretreated odor.

[0022] In this embodiment, the odor inlet device 1 includes an odor inlet pipe 101 and an induced draft fan 102. The inlet of the induced draft fan 102 is connected to the odor inlet pipe 101 to stably introduce the odor to be treated. The outlet of the induced draft fan 102 is connected to the inlet 401 of the duct cavity 4, forming an independent odor input channel. The two airflows, independently controlled by the dual fans, are forcibly convection-mixed in the duct cavity 4. The induced draft fan 102 can dynamically adjust the introduced airflow according to the initial concentration of odor. The blower 3 synchronously matches the plasma output intensity, avoiding the problem of uneven airflow distribution caused by the traditional single airflow odor directly passing through multiple modules. At the same time, the two airflows are fully contacted in the sufficient fusion space provided by the duct cavity 4, ensuring that the plasma free radicals react efficiently with the odor molecules. This not only improves the stability of pretreatment but also lays a uniform and controllable air intake condition for the subsequent deep purification of the scrubbing tower 5.

[0023] The duct cavity 4 has multiple guide plates and flow straightening grids built in, and check valves are installed at the corresponding air inlet 401 and air inlet 402 respectively. The guide plates are staggered along the cavity axis to guide the two airflows from air inlet 401 and air inlet 402 to form a spiral interlaced flow, which forcibly expands the contact surface between the odor and the plasma. The flow straightening grid is located in the middle and rear section of the cavity. It sorts out the vortex and balances the flow velocity distribution through dense grids to ensure that the odor and plasma are uniformly excited and reacted in the cavity.

[0024] As shown in Figures 3 and 4, the scrubbing tower 5 includes an air outlet 501 at the top of the tower, a water tank 502 at the bottom of the tower, and multiple layers of Raschig ring packing 503 spaced apart along the height of the tower. The stacking of the packing layers increases the gas-liquid contact area and prolongs the mass transfer residence time between the odor and the spray liquid, ensuring that the soluble components and intermediate products remaining after plasma pretreatment are fully absorbed. The water tank 502 is connected to the main spray pipe 505 through a circulation pump 504. The main spray pipe 505 is connected to two spray branch pipes installed in the scrubbing tower 5. The spray branch pipes are located between two adjacent layers of Raschig ring packing 503 and are connected to multiple spaced spray heads along their length, so that the spray liquid uniformly covers the surface of the packing in a mist, avoiding local dry areas or liquid accumulation, enhancing the gas-liquid turbulent mass transfer efficiency, and realizing water recycling through the circulation pump 504.

[0025] A water inlet 506 is provided on the outward-facing side of the water tank 502, and a drain outlet 507 is provided at the bottom of the scrubbing tower 5. Both the water inlet 506 and the drain outlet 507 are equipped with valves. The water tank 502 has a built-in liquid level sensor. The signal output terminal of the liquid level sensor is linked to the control system of the valve. When the liquid level is lower than the threshold, the water inlet valve is automatically opened to replenish water. When the liquid level is higher than the threshold, the drain valve is opened to discharge excess water, ensuring a constant spray volume and avoiding spray interruption or chemical concentration imbalance caused by abnormal liquid level.

[0026] The spray tower is equipped with a maintenance ladder 509 on its outer side. The maintenance ladder 509 is set vertically along the outer side of the tower body and adopts an integrated structure of anti-slip treads and safety guardrails. This not only avoids occupying the purification space inside the tower, but also provides maintenance personnel with a safe and direct passage to various heights of the tower. The top of the spray tower is equipped with a maintenance manhole 510, which is connected to a maintenance door. The maintenance door adopts a quick-opening sealing design, which can be quickly opened to allow personnel to enter the tower, and can also isolate external moisture and debris through sealing strips to prevent the environment inside the tower from being contaminated.

[0027] In use, the odorous gas is introduced through the odorous gas inlet pipe 101 by the induced draft fan 102 and enters the air inlet 401 of the air duct cavity 4. The two low-temperature plasma modules built into the dual-medium plasma generator 2 ionize the air to generate highly active plasma containing high-energy electrons and free radicals. After being accelerated by the blower 3 through the jet pipe, the plasma is injected into the air duct cavity 4 through the second air inlet 402. The plasma mixes with the odorous gas in the cavity by adjusting the static pressure through the guide plate and the rectifier grid to achieve laminar flow and pressure equalization. Under the protection of the check valve to prevent backflow, forced convection mixing is achieved. The plasma oxidizes and decomposes odorous gas molecules such as sulfides, amines, and VOCs into small molecule harmless substances. After the pretreated gas enters the scrubbing tower 5, it passes through the multi-layer Raschig ring packing 503 to increase the gas-liquid contact area. The precision spraying system, composed of water tank 502, circulating pump 504, spray branch pipes and nozzles, atomizes and absorbs the remaining soluble components and intermediate products, and finally achieves the emission standard. The advantages of this utility model are as follows: the guide plate and rectifier grid inside the duct cavity 4 realize the static pressure regulation function, avoid the influence of airflow fluctuation on the treatment effect of the subsequent scrubbing tower 5, and ensure that the overall emission meets the standards; the dual-medium low-temperature plasma module adopts two different insulating materials or electrode structures, which can enhance the uniformity of the electric field and improve the electron collision ionization efficiency, and generate high-density plasma at a lower voltage, which can more accurately control the discharge process and reduce ineffective energy loss. At the same time, the two modules can work together or be redundantly backed up, which not only increases the plasma output to match the larger processing air volume, but also ensures the operational stability of the equipment when some modules fail.

[0028] The above description of the embodiments is only for the purpose of helping to understand the structure and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An injection-type dual-medium low-temperature plasma deodorization device, characterized in that, The system includes an odor inlet device, a dual-medium plasma generator, a blower, a duct cavity, and a scrubbing tower. The output end of the odor inlet device is connected to the air inlet of the duct cavity. The dual-medium plasma generator has two built-in dual-medium low-temperature plasma modules, which are used to ionize air to generate highly active plasma. The output end of the dual-medium plasma generator is connected to the input end of the blower. The output end of the blower is connected to the air inlet of the duct cavity. The duct cavity provides a fusion space for the mixing of plasma and odor. The air outlet of the duct cavity is connected to the air inlet of the scrubbing tower. The scrubbing tower is used to deeply purify the pre-treated odor.

2. The injection-type dual-medium low-temperature plasma deodorization device according to claim 1, characterized in that, A single dual-medium low-temperature plasma module can handle an air volume of 3000 m³ / h.

3. The injection-type dual-medium low-temperature plasma deodorization device according to claim 1, characterized in that, The odor inlet device includes an odor inlet pipe and an exhaust fan. The exhaust fan’s inlet is connected to the odor inlet pipe, and the exhaust fan’s outlet is connected to the exhaust port of the duct cavity.

4. The injection-type dual-medium low-temperature plasma deodorization device according to claim 1, characterized in that, The duct cavity has multiple guide plates and straightening grilles built in, and check valves are respectively installed for air inlet one and air inlet two.

5. The injection-type dual-medium low-temperature plasma deodorization device according to claim 1, characterized in that, The scrubbing tower includes an air outlet at the top of the tower, a water tank at the bottom of the tower, and multiple layers of Raschig ring packing spaced apart along the height of the tower. The water tank is connected to the main spray pipe via a circulating pump. The main spray pipe is connected to several spray branch pipes. The spray branch pipes are located between two adjacent layers of Raschig ring packing and are connected to several spray heads spaced apart along their own length.

6. The injection-type dual-medium low-temperature plasma deodorization device according to claim 5, characterized in that, The water tank has a water inlet on its outward-facing side, and the washing tower has a drain outlet at its bottom. Both the water inlet and the drain outlet are equipped with valves. The water tank has a built-in liquid level sensor, and the signal output of the liquid level sensor is linked to the valve control system.

7. The injection-type dual-medium low-temperature plasma deodorization device according to claim 5, characterized in that, The washing tower is equipped with a maintenance ladder on its outside, and a maintenance manhole is provided on the top of the washing tower, which is connected to a maintenance door.

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