An exhaust gas pre-treatment device

Abstract

The utility model relates to industrial waste gas treatment technical field, concretely relates to a kind of waste gas pretreatment equipment, including jar body, the lower part of jar body is equipped with air inlet, top is equipped with gas outlet, the partition in jar body is equipped with, the partition is equipped with multiple holes for gas to be used for the upward flow-through, the partition is scattered and has the packing for increasing gas-liquid contact area, spray assembly is equipped in jar body, jar body is equipped with cyclone separator, first fan is equipped between cyclone separator and jar body, the gas outlet at the top of cyclone separator is connected with the air inlet of first fan by first pipe body, the air outlet of first fan is connected with the air inlet of jar body lower part by second pipe body.Combination processing by cyclone separator and the packing layer, spray assembly arranged in jar body, can effectively intercept large particle dust, capture fine particles, significantly reduce the particulate matter content in waste gas, thereby protect subsequent dust removal, desulfurization and denitration equipment.

Description

Technical Field

[0001] This utility model relates to the field of industrial waste gas treatment technology, and more specifically, to a waste gas pretreatment device. Background Technology

[0002] During cement production, limestone crushing, material conveying, rotary kiln calcination, and cement grinding processes generate a large amount of dust-laden waste gas. This waste gas contains not only particulate dust but also gaseous pollutants such as sulfur dioxide and nitrogen oxides. If the particulate dust in the waste gas is not pretreated and is allowed to directly enter subsequent treatment equipment (such as bag filters, electrostatic precipitators, or desulfurization and denitrification devices), a large amount of particulate dust will rapidly deposit on the filter media or electrostatic electrodes, causing increased resistance, frequent cleaning, and shortening the service life of the equipment. At the same time, the dust may enter the desulfurization or denitrification units and accumulate on the surface of the subsequent treatment units, reducing the contact efficiency between the gas and the absorbent or catalyst, resulting in a decrease in purification effect. Therefore, pretreatment of this type of waste gas is necessary. Summary of the Invention

[0003] The purpose of this invention is to provide a waste gas pretreatment device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A waste gas pretreatment device includes a tank, with an air inlet at the bottom and an air outlet at the top. A baffle plate is installed inside the tank, with multiple holes for upward gas flow. Packing material is randomly piled on the baffle plate to increase the gas-liquid contact area. A spray assembly located above the baffle plate and used to capture fine particles is installed inside the tank. A water supply assembly is located beside the tank. A cyclone separator is located beside the tank. A first fan is installed between the cyclone separator and the tank. The gas outlet at the top of the cyclone separator is connected to the air inlet of the first fan via a first pipe. The air outlet of the first fan is connected to the air inlet at the bottom of the tank via a second pipe. A cleaning assembly is installed on the baffle plate to prevent clogging of the holes. A demister is located above the spray assembly inside the tank. A slag discharge pipe is located at the bottom of the tank.

[0005] Furthermore, the spray assembly includes a main pipe, which is located on the side wall of the tank and connected to multiple branch pipes, each branch pipe being equipped with several atomizing nozzles.

[0006] Furthermore, the water supply assembly includes a water storage tank, with a cover on the top of the water storage tank. A circulating water pump is installed on the cover. The inlet of the circulating water pump is connected to the inside of the water storage tank through a first water pipe, and the outlet is connected to the main pipe through a second water pipe. A water filling pipe connected to the inside of the water storage tank is provided on the cover.

[0007] Furthermore, the cleaning assembly includes a rotating rod located at the center of the partition, with multiple drive blades at the bottom end of the rotating rod, the air outlet of the second tube extending into the tank and facing the blades, and a waterproof cover covering the top of the rotating rod located at the center of the partition.

[0008] Furthermore, the rotating rod is provided with a rotating plate located below the partition, and the rotating plate is provided with bristles that can contact the partition.

[0009] Furthermore, the tank body is provided with an overflow outlet, and a first connecting pipe is provided at the overflow outlet. The water storage tank is provided with an inlet, and a second connecting pipe is provided at the inlet. A filter box is provided between the first connecting pipe and the second connecting pipe, and a filter screen is provided inside the filter box.

[0010] Furthermore, an exhaust pipe is provided at the air outlet, and a second fan is provided at the outlet end of the exhaust pipe to guide the pretreated waste gas into the subsequent treatment equipment.

[0011] Furthermore, the tank body is provided with multiple observation holes, and each observation hole is equipped with an observation window that can be opened and closed.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through the combination of a cyclone separator and a packing layer and spray components inside the tank, can effectively intercept large dust particles and capture fine particles, significantly reducing the particulate matter content in the exhaust gas, thereby protecting subsequent dust removal, desulfurization and denitrification equipment, extending their service life and improving purification efficiency.

[0013] This invention, through the setting of the cleaning component, can automatically brush the holes of the baffle plate during equipment operation, preventing the holes from being blocked by dust, thereby ensuring the smooth passage of exhaust gas, improving the dust removal efficiency of the spray and packing layer, and reducing the problems of increased equipment resistance and frequent dust cleaning caused by blockage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a waste gas pretreatment device according to the present invention.

[0015] Figure 2 This is a schematic diagram of the internal components of the tank in this utility model.

[0016] Figure 3 This is a structural schematic diagram of the partition plate and its components in this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the water storage tank and its connected components in this utility model.

[0018] The meanings of the labels in the diagram are as follows: 100, Tank body; 101, Baffle plate; 102, Hole; 103, Cyclone separator; 104, First blower; 105, First pipe body; 106, Second pipe body; 107, Gas inlet; 108, Slag discharge pipe; 109, Exhaust pipe; 110, Observation window; 111, Demister; 200, Main pipe; 201, Branch pipe; 202, Nozzle; 300, Water storage tank; 301, Circulating water pump; 302, First water pipe; 303, Second water pipe; 304, Water supply pipe; 400, Rotating rod; 401, Blade; 402, Waterproof cover; 403, Rotating plate; 404, Brush bristles; 500, First connecting pipe; 501, Second connecting pipe; 502, Filter box; 503, Filter screen. Detailed Implementation

[0019] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0020] The following is in conjunction with the appendix Figures 1-4 This embodiment will be described in further detail.

[0021] Please see Figures 1-4 The waste gas pretreatment device in this embodiment includes a tank 100. The lower part of the tank 100 is provided with an air inlet to facilitate the entry of dust-laden waste gas from bottom to top. The top of the tank 100 is provided with an air outlet for discharging the pretreated gas.

[0022] A baffle 101 is fixed inside the tank 100, and multiple holes 102 are evenly distributed on the baffle 101 to allow gas to flow upward. Packing material, such as Pall rings or stepped rings, is randomly piled on the baffle 101 to increase the gas-liquid contact area and improve particulate matter collection efficiency. A spray assembly is installed above the baffle 101 to spray and collect the rising exhaust gas. A water supply assembly is installed outside the tank 100, connected to the spray assembly to provide a circulating water source for the spray.

[0023] A cyclone separator 103 is provided outside the tank body 100. A first fan 104 is provided between the cyclone separator 103 and the tank body 100. The first fan 104 can be fixed by an external bracket. The top outlet of the cyclone separator 103 is connected to the air inlet of the first fan 104 through the first pipe 105. The air outlet of the first fan 104 is connected to the air inlet at the bottom of the tank body 100 through the second pipe 106. Therefore, under the action of the first fan 104, the exhaust gas first enters the cyclone separator 103 through the gas inlet 107 for inertial separation. Large dust particles are separated in the cyclone separation stage and discharged from the bottom of the cyclone separator 103. Fine particles enter the tank body 100 for further treatment through the first pipe 105 and the second pipe 106 with the exhaust gas. The cyclone separator 103 separates the large dust particles first, reducing the burden on the subsequent spraying and packing layer.

[0024] The baffle 101 is also equipped with a cleaning component to prevent the holes 102 from being blocked, ensuring the upward flow of exhaust gas. A demister 111 is fixedly installed above the spray assembly. The demister 111 adopts a plate or corrugated wire mesh structure, made of multiple layers of metal wire mesh or corrosion-resistant materials. When the exhaust gas passes through the demister 111, the airflow repeatedly changes direction between the wire mesh or plate gaps. Due to inertia, the droplets hit the wire mesh surface and condense into water droplets, which then fall back to the bottom of the tank 100 along the wire mesh or plate surface, completing the droplet separation. This ensures that the discharged gas is dry and clean, while protecting downstream equipment from droplet corrosion and improving the stability and service life of the overall exhaust gas treatment system.

[0025] The tank body 100 is equipped with a slag discharge pipe 108 at the bottom for discharging settled solid particles and sludge. The slag discharge pipe 108 is equipped with a valve for sealing the slag discharge pipe 108 during equipment operation. The valve can be opened when slag discharge is required.

[0026] The bottom of the tank 100 is designed with a funnel-shaped structure. This structure allows settled dust particles and sludge carried by the spray water to naturally converge at the bottom of the funnel under gravity, preventing large-scale accumulation at the bottom of the tank 100. The sediment, guided by the funnel shape, enters the slag discharge pipe 108, facilitating rapid discharge and reducing manual cleaning workload, thus making the slag discharge process more efficient. Furthermore, this funnel-shaped structure achieves automatic settling and centralized discharge without additional power, ensuring effective utilization of the internal space and preventing excessive sediment from affecting gas-liquid contact, thereby improving the equipment's continuous operation capability and overall dust removal efficiency.

[0027] Please see Figures 1-2In this embodiment, the spray assembly includes a main pipe 200, and multiple branch pipes 201 are evenly distributed on the side wall of the main pipe 200 inside the tank 100. Atomizing nozzles 202 are installed on the branch pipes 201. The atomizing nozzles 202 can atomize the circulating water into fine water droplets, forming a uniform water mist curtain inside the tank 100, thereby enhancing the collection effect of fine dust.

[0028] The water supply assembly includes a water storage tank 300, with a cover on top that seals the tank when closed. A circulating water pump 301 is mounted on the cover. The inlet of the circulating water pump 301 is connected to the inside of the water storage tank 300 via a first water pipe 302, and the outlet is connected to the main pipe 200 of the spray assembly via a second water pipe 303. A water inlet pipe 304 is provided on the cover, with a valve on it. By opening the valve, clean water or chemical solution can be added to the water storage tank 300, ensuring a continuous supply of spray solution. When the circulating water pump 301 starts, the water in the storage tank 300 is drawn into the circulating water pump 301 through the first water pipe 302. After being pressurized by the circulating water pump 301, the water is transported to the main pipe 200 of the spray assembly through the second water pipe 303. Then, the water is evenly distributed to multiple branch pipes 201 from the main pipe 200. Finally, the water is sprayed into uniform fine water droplets through the atomizing nozzles 202 on the branch pipes 201, covering the airflow channel of the tank 100 and making full contact with the rising exhaust gas.

[0029] In this embodiment, the water collected at the bottom of the tank 100 can flow back to the storage tank 300, realizing the reuse of water resources. When the concentration of impurities in the circulating water is too high, the sludge deposited in the tank 100 can be discharged through the sludge discharge pipe 108, and clean water or chemical solution can be added to the storage tank 300 through the water addition pipe 304 to ensure the cleanliness and absorption capacity of the spray liquid.

[0030] Please see Figures 2-3 In this embodiment, the cleaning assembly includes a rotating rod 400, which is rotatably connected to the center of the partition 101. Specifically, the partition 101 has a through hole, in which a bearing or sleeve is installed, and the rotating rod 400 passes through to achieve its rotatable installation below the partition 101. Multiple drive blades 401 are fixedly installed at the bottom end of the rotating rod 400. The air outlet of the second tube 106 faces the drive blades 401, and the airflow drives the blades 401 to rotate, thereby driving the rotating rod 400 to rotate.

[0031] Specifically, a waterproof cover 402 is sealed and installed at the center of the partition 101 to prevent the spray liquid from entering the rotating parts of the cleaning component and to ensure the stability of the component.

[0032] A rotating plate 403 is fixedly installed on the rotating rod 400. The rotating plate 403 is located below the partition 101. The rotating plate 403 is provided with bristles 404. When the rotating rod 400 rotates, the bristles 404 contact the bottom surface of the partition 101, which can clean the deposits on the edge of the hole 102 and prevent the hole 102 from being blocked.

[0033] Please see Figure 1 and Figure 4 In this embodiment, the tank 100 has an overflow outlet at its upper end, which is connected to the filter box 502 via a first connecting pipe 500. The water storage tank 300 has an inlet at its upper end, which is connected to the filter box 502 via a second connecting pipe 501. When the spray liquid accumulates at the bottom of the tank 100, its level rises, and some of the spray liquid flows through the overflow outlet into the first connecting pipe 500 and into the filter box 502. The filter box 502 is equipped with a removable filter screen 503, which can trap solid impurities in the water, allowing relatively clean water to pass through the filter screen 503 to flow to the other side of the filter box 502, and finally return to the water storage tank 300 via the second connecting pipe 501, thereby realizing the recycling of water.

[0034] The filter box 502 has an opening at the top, with a removable cover. When the cover is closed, it seals the filter box 502. As impurities accumulate on the filter screen 503, the cover can be opened to disassemble the filter screen 503 for cleaning or replacement. The operation is simple and the maintenance cost is low. This circulating filtration method ensures the recycling of spray water while maintaining the cleanliness of the spray liquid, effectively reducing the consumption of clean water.

[0035] Please see Figure 1 and Figure 4 In this embodiment, an exhaust pipe 109 is sealed and connected to the outlet. A second fan is provided at the outlet end of the exhaust pipe 109. The second fan can stably draw the exhaust gas entering the tank 100, causing the exhaust gas to pass sequentially through the packing layer on the partition 101, the spray assembly, and the demister 111, and then be transported to the subsequent treatment equipment. The outlet end of the exhaust pipe 109 is connected to the inlet of the second fan, and the outlet of the second fan is connected to the subsequent treatment equipment through a conveying pipeline. The subsequent treatment equipment can be a bag filter, an electrostatic precipitator, a desulfurization device, or a denitrification device.

[0036] Please see Figure 1 In this embodiment, the tank 100 is provided with multiple observation holes, and an openable observation window 110 is installed at each observation hole. When the observation window 110 is closed, it can seal the observation hole. The operator can observe the internal operating status of the tank 100 through the observation window 110, such as the spray coverage, the packing layer deposition, and the gas-liquid contact effect, thereby facilitating daily maintenance and repair.

[0037] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A waste gas pretreatment device, comprising a tank (100), characterized in that: The tank (100) has an air inlet at the bottom and an air outlet at the top. A baffle (101) is located inside the tank (100). The baffle (101) has multiple holes (102) for upward gas flow. Packing material is randomly piled on the baffle (101) to increase the gas-liquid contact area. A spray assembly located above the baffle (101) is located inside the tank (100) for capturing fine particles. A water supply assembly is located beside the tank (100). A cyclone separator (103) is located beside the tank (100). 3) A first blower (104) is provided between the tank (100) and the cyclone separator (103). The gas outlet at the top of the cyclone separator (103) is connected to the air inlet of the first blower (104) through a first pipe (105). The air outlet of the first blower (104) is connected to the air inlet at the bottom of the tank (100) through a second pipe (106). A cleaning component is provided on the partition (101) to prevent the holes (102) from being blocked. A demister (111) is provided inside the tank (100) above the spray component. A slag discharge pipe (108) is provided at the bottom of the tank (100).

2. The waste gas pretreatment equipment according to claim 1, characterized in that: The spray assembly includes a main pipe (200), which is located on the side wall inside the tank (100) and connected to multiple branch pipes (201). Several atomizing nozzles (202) are provided on the branch pipes (201).

3. The waste gas pretreatment equipment according to claim 1, characterized in that: The water supply assembly includes a water storage tank (300), with a cover on the top of the water storage tank (300). A circulating water pump (301) is provided on the cover. The inlet of the circulating water pump (301) is connected to the inside of the water storage tank (300) through a first water pipe (302), and the outlet is connected to the main pipe (200) through a second water pipe (303). A water filling pipe (304) is provided on the cover and is connected to the inside of the water storage tank (300).

4. The waste gas pretreatment equipment according to claim 1, characterized in that: The cleaning assembly includes a rotating rod (400) located at the center of the partition (101), with multiple drive blades (401) at the bottom end of the rotating rod (400), and the air outlet of the second tube (106) extending into the tank (100) and facing the blades (401). A waterproof cover (402) covering the top of the rotating rod (400) is located at the center of the partition (101).

5. The waste gas pretreatment equipment according to claim 4, characterized in that: The rotating rod (400) is provided with a rotating plate (403) located below the partition (101), and the rotating plate (403) is provided with bristles (404) that can contact the partition (101).

6. The waste gas pretreatment equipment according to claim 2, characterized in that: The tank (100) is provided with an overflow port, and a first connecting pipe (500) is provided at the overflow port. The water storage tank (300) is provided with an inlet, and a second connecting pipe (501) is provided at the inlet. A filter box (502) is provided between the first connecting pipe (500) and the second connecting pipe (501), and a filter screen (503) is provided inside the filter box (502).

7. The waste gas pretreatment equipment according to claim 1, characterized in that: An exhaust pipe (109) is provided at the outlet, and a second fan is provided at the outlet end of the exhaust pipe (109) to guide the pretreated waste gas into the subsequent treatment equipment.

8. The waste gas pretreatment equipment according to claim 1, characterized in that: The tank body (100) is provided with multiple observation holes, and the observation holes are provided with observation windows (110) that can be opened and closed.

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