Wet dust removal device

Abstract

A wet dust removal device belongs to the technical field of environmental protection facilities. Comprising a dedusting box body, the dust-containing flue gas wet dust removal mechanism is arranged in the box body cavity; the water supply mechanism is arranged on the dust removal box body; the wet dust removal device is characterized in that the dust-containing flue gas wet dust removal mechanism comprises a plate type spraying device, a gas-liquid phase separation device, an upper water curtain forming device, a lower water curtain forming device and a water film forming, gas guiding and pollution reducing device which are located in a box body cavity, and the water film forming, gas guiding and pollution reducing device is fixed to the cavity wall of the front-back opposite side of the middle of the box body cavity; the water supply mechanism is communicated with the plate type spraying device and the water film forming, air guiding and pollution reducing device; and the position of the dust-containing flue gas introduction interface on the front side of the dust removal box body corresponds to the position between the plate type spraying device and the upper water curtain forming device. The device has the advantages that the clearance precision, the liquid-gas ratio precision and spraying parameters such as spraying pressure are prevented from being challenged; the energy-saving effect is good, and the service life is long; air flow is uniformly distributed, so that penetration of clean air is facilitated, and dust-containing sewage is conveniently guided downwards and discharged outwards to a sewage collection container.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection facilities technology, specifically relating to a wet dust removal device. Background Technology

[0002] Taking steel production enterprises as an example, they need to process the iron, calcium, silicon oxides, SO2, and NO produced in many production processes such as pelletizing, sintering, steelmaking, rolling, hot tapping of steel slag, hot quenching, and sintering quicklime digestion. X High-concentration dust and flue gas containing heavy metals (such as Pb and Zn) and sticky particles (Ca(OH2) produced by quicklime digestion) are important for dust treatment. Wet dust removal is the preferred solution for high-temperature flue gas (200-600℃) generated during the hot stamping and quenching processes of steel slag. Wet dust removal methods, such as using spray cooling towers combined with Venturi scrubbers, are effective in capturing particulate matter. Furthermore, achieving dust removal and desulfurization of sulfides (SO2, HF) in pellet drying flue gas is of positive significance.

[0003] Compared to dry dust collection, wet dust collection can directly cool high-temperature flue gas (such as flue gas exceeding 1000℃ generated during hot slag ignition) by spraying water, avoiding the problems of high-temperature filter bags or relatively complex pretreatment required in dry dust collection. Dry dust collection typically requires cooling via heat exchangers or by mixing in cold air, increasing system complexity. Wet dust collection is effective against the aforementioned sticky substances (CaO, metal oxides) because dust generated from pelletizing or slag processing usually has a high moisture content and is accompanied by sticky substances. Wet methods have an exceptionally high capture efficiency for fine particles (such as PM2.5 in sintering flue gas), while dry methods are only effective for particulate matter. Wet methods are unaffected by dust resistivity, while dry electrostatic precipitators are not ideal for high-resistivity dust such as steelmaking fumes (efficiency drops significantly). In terms of structure and safety, wet dust removal devices are relatively compact, occupy little space, and have no risk of explosion. For example, for flue gas containing flammable gases such as CO and H2 (e.g., converter gas), dry dust removal requires additional explosion-proof measures, while wet dust removal does not.

[0004] As can be seen from the above, although wet dust removal consumes water resources, it is significantly superior to dry dust removal when considering all factors. This may be an important reason why the industry values ​​wet dust removal.

[0005] Technical information related to wet dust removal can be found in publicly available Chinese patent documents. For example, CN211133440U recommends "a wet dust removal device for flue gas" and CN119793123A provides a waste gas treatment device for metallurgical equipment. A typical example is CN214597986U, which describes "a wet dust removal device for flue gas". This patent is designed for dust generated in the steel industry, such as in rod mill production lines, because according to the national standard for total particulate matter emissions, the concentrated emission of particulate matter should be ≤20mg / m³. 3 Industrial dust particles ≤5mg / m³ 3 Existing technologies such as bag filters, electrostatic precipitators, or a combination of both are complex, energy-intensive, and require stringent installation, commissioning, and maintenance, with frequent repairs. Therefore, CN214597986U employs wet dust collection. According to paragraphs 0031 to 0046 of the patent's specification and the interpretation of its diagrams, dust-laden flue gas is collected by a gas collection hood and then fed into the wet dust collection tower by a blower connected to the hood and the tower via a pipeline. The dust-laden flue gas entering the tower passes sequentially from bottom to top through a venturi rod layer, a spray layer, and the rinsing nozzles of a demister before exiting from the exhaust port (referred to as the "exhaust stack" in the patent) at the top of the tower. During this process, the spray layer and demister are supplied with circulating water. While this patent delivers on the technical effects described in paragraphs 0023 to 0025 of its specification, it has the following shortcomings: Although the Venturi effect can break liquids into finer droplets, such as 10-100μm, thereby effectively increasing the gas-liquid contact area, it places relatively stringent requirements on the precision design of the gaps and the spray parameters. Specifically, it is quite demanding on the spray pressure, and the precise control of the liquid-to-gas ratio (L / G) is relatively difficult. The pressure loss of the Venturi effect is relatively high (1-3KPa) and the fan energy consumption is high. Although the Venturi effect has the advantage of being less prone to clogging by sticky dust such as granulated mineral dust due to the relatively large gap between the rods, typically 20-50mm, the rods need to be replaced after wear. It is not suitable for processing high-temperature, fine, sticky dust and for applications with stringent efficiency requirements (such as steel slag treatment). In addition, CN214597986U has a monotonous flue gas dust removal process. For example, after the flue gas passes through the Venturi rod layer, it is only discharged from the exhaust port through the spray layer and the demister layer. It cannot carry out more effective dust removal treatment such as liquid film formation or water curtain formation on the dust-laden flue gas. Therefore, the cleanliness requirements of the exhaust gas, i.e. the air discharged from the exhaust port, are difficult to meet the industry's expectations. Utility Model Content

[0006] The objective of this invention is to provide a wet dust removal device that helps to eliminate the need for venturi rod layers, thereby avoiding issues with gap accuracy, liquid-to-gas ratio accuracy, and spray parameters such as spray pressure; helps to avoid pressure loss and thus achieve good energy-saving effects; helps to reduce the need for component replacement and thus ensure the long service life of each component; helps to avoid issues with flue gas properties such as temperature, particle size, and viscosity, thus achieving good adaptability to the flue gas to be treated; and helps to ensure that the treated exhaust air meets industry expectations, thus achieving ideal environmental protection.

[0007] The present invention achieves its objective as follows: a wet dust removal device includes a dust removal box body. A dust-laden gas inlet is connected to the front side of the dust removal box body for introducing dust-laden flue gas into the box cavity. An exhaust port, communicating with the box cavity, is connected to the center of the top of the dust removal box body for discharging the air after dust removal from the box cavity. Finally, a sludge discharge port, also communicating with the box cavity, is connected to the center of the bottom of the dust removal box body for discharging sludge generated during wet treatment for subsequent use. The treatment device includes a sewage discharge port; a wet dust collection mechanism for treating the dust-laden gas introduced into the chamber via the dust-laden gas inlet port; and a water supply mechanism for supplying water to the wet dust collection mechanism, which is fixed to the upper rear side of the dust collection box and connected to a water source pipeline in use. The wet dust collection mechanism comprises: a sewage discharge port for processing; a dust collection mechanism disposed within the chamber cavity for treating the dust-laden gas introduced into the chamber via the dust collection port inlet port; and a wet dust collection mechanism for treating the dust-laden gas introduced into the chamber cavity via the dust collection port inlet port. The enclosure contains a plate-type spray device, a gas-liquid phase separator, an upper water curtain forming device, a lower water curtain forming device, and a water film forming and air guiding / pollution reduction device. The water film forming and air guiding / pollution reduction device is fixed to the cavity wall on one side of the cavity at the midpoint of the height direction, with space maintained between the water film forming and air guiding / pollution reduction device and the cavity wall on all sides. The plate-type spray device is fixed to the top of the water film forming and air guiding / pollution reduction device. The gas-liquid phase separator is located above the water film forming and air guiding / pollution reduction device and is positioned within the enclosure. The position between the left and right cavity walls of the body cavity is fixed between the front and rear cavity walls of the box cavity. The upper water curtain forming device is fixed between the front and rear cavity walls of the box cavity, located above the lower water curtain forming device. The lower water curtain forming device is fixed between the front and rear cavity walls of the box cavity. The water supply mechanism is connected to the plate spray device and the water film forming air guiding and pollution reduction device. The dust-laden flue gas inlet is located on the front side of the dust removal box body between the plate spray device and the upper water curtain forming device.

[0008] In a specific embodiment of this utility model, a liquid level acquisition device for maintaining the water level in the box cavity at the lower part of any one of the front, rear, left, or right cavity walls of the box cavity is provided to submerge the lower edge of the water film forming air guiding and pollution reduction device. In use, the liquid level acquisition device and the water supply mechanism are electrically connected to the electrical controller.

[0009] In another specific embodiment of this utility model, the plate-type spray device includes a spray chamber top plate, a spray chamber bottom plate, and a spray chamber. The top and bottom plates of the spray chamber are vertically aligned and equal in size. The perimeter of the spray chamber is sealed by a spray chamber side sealing plate. The bottom plate of the spray chamber is fixed to the top of the water film forming air guiding and pollution reduction device. Spray holes are densely arranged on the bottom plate. The spray chamber is located within the space formed by the top and bottom plates of the spray chamber and the side sealing plate. The water supply mechanism communicates with the spray chamber. The water film forming air guiding and pollution reduction device includes a left baffle and a right baffle. The left and right baffles are vertically aligned and equal in size and height. The left and right baffles are fixed to the cavity wall on opposite sides of the middle of the height direction of the box cavity. The left and right baffles are fixed to the box body. There are spaces between the left and right walls of the cavity and between the upper and lower parts of the box body. The space between the opposite sides of the left and right baffles in the height direction constitutes a liquid-guiding space. The lower end of the left baffle is configured as a left orifice plate with densely packed left baffle holes, and the lower end of the right baffle is configured as a right orifice plate with densely packed right baffle holes. In use, the liquid level in the box body cavity submerges the lower edges of the left and right orifice plates. The gas-liquid phase separation device is fixed between the front and rear walls of the box body cavity at a position between the upper part of the left baffle and the opposite side of the left cavity wall of the box body cavity, and at a position between the upper part of the right baffle and the opposite side of the right cavity wall of the box body cavity. The upper water curtain forming device and the lower water curtain forming device are located in the liquid-guiding space between the opposite sides of the left and right baffles. The water supply mechanism extends to the upper part of the liquid-guiding space.

[0010] In another specific embodiment of this utility model, the gas-liquid phase separation device includes a set of left gas-liquid phase separation plates and a set of right gas-liquid phase separation plates. The set of left gas-liquid phase separation plates is disposed between the upper part of the left baffle and the opposite side of the cavity wall of the box cavity, and the set of right gas-liquid phase separation plates is disposed between the upper part of the right baffle and the opposite side of the cavity wall of the box cavity. The set of left gas-liquid phase separation plates are distributed in a spaced-out manner, and each pair of adjacent left gas-liquid phase separation plates is parallel to each other in the length direction. The set of right gas-liquid phase separation plates are also distributed in a spaced-out manner, and each pair of adjacent right gas-liquid phase separation plates is also parallel to each other in the length direction.

[0011] In another specific embodiment of this utility model, the cross-sectional shape of the set of left gas-liquid phase separation plates and the set of right gas-liquid phase separation plates is S-shaped.

[0012] In another specific embodiment of this utility model, the upper water curtain forming device includes a left spray liquid flow plate and a right spray liquid flow plate. The left and right spray liquid flow plates are located in the liquid guiding space and are fixed between the opposing sides of the box cavity and the front and rear cavity walls at a position corresponding to the upper part of the lower water curtain forming device. The upper parts of the left and right spray liquid flow plates in the length direction are joined together, while the lower parts in the length direction are separated from each other. The spray liquid flowing through the left and right spray liquid flow plates flows downward to the lower water curtain forming device in the form of forming a water curtain.

[0013] In a further specific embodiment of this utility model, the left and right spray plates together form a structure with a cross-sectional shape of ∧.

[0014] In a further specific embodiment of this utility model, the lower water curtain forming device includes a left guide plate and a right guide plate. The left and right guide plates are located in the liquid guiding space and are fixed in an inclined state between opposite sides of the front and rear cavity walls of the box cavity at positions corresponding to the left and right flow plates of the spray liquid, respectively. The left side of the left guide plate in the length direction is fixed to the side of the left baffle facing the right baffle, and the right side of the right guide plate in the length direction is fixed to the side of the right baffle facing the left baffle. The primary water curtain formed by the downward flow of the left and right flow plates of the spray liquid flows downward through the left and right guide plates in the state of forming a secondary water curtain. The cross-sectional shape of the left and right guide plates is corrugated.

[0015] In yet another specific embodiment of this utility model, the water supply mechanism includes a main water supply pipe, a spray chamber liquid supply connector, a left spray pipe for the liquid inlet space, and a right spray pipe for the liquid inlet space. The main water supply pipe is fixed to the upper rear side of the dust collector box and is connected to a pressurized water source through a pipe in use. One end of the spray chamber liquid supply connector is connected to the main water supply pipe, while the other end extends into the spray chamber. The left and right spray pipes for the liquid inlet space are parallel to each other and correspond to the upper part of the liquid inlet space, and each is connected to the main water supply pipe. A left spray nozzle is provided at intervals on the downward-facing side of the left spray pipe for the liquid inlet space, and a right spray nozzle is provided at intervals on the downward-facing side of the right spray pipe for the liquid inlet space.

[0016] In another specific embodiment of this utility model, the liquid level signal acquisition device for the box cavity includes a high liquid level sensor and a low liquid level sensor, which are electrically connected to the electrical controller in use.

[0017] The technical advantages of the present invention are as follows: Since no Venturi rod layer is required, it avoids being overly demanding regarding gap accuracy, liquid-to-gas ratio accuracy, and spray parameters such as spray pressure; the structure of the wet dust removal mechanism for dust-laden flue gas, composed of a plate spray device, a gas-liquid phase separation device, an upper water curtain forming device, a lower water curtain forming device, and a water film forming and air guiding / pollution reduction device, is reasonable, thus not affecting pressure loss and achieving good energy-saving effects; it also benefits from the advantage of minimizing component replacement, ensuring a long service life; and the plate with a water distribution plate effect... This spray system effectively removes dust from the flue gas introduced through the dust-laden gas inlet. The gas-liquid phase separation device effectively reduces water mist in the air discharged from the exhaust port. The upper and lower water curtain forming devices ensure full contact between the liquid and gas for maximum dust removal. The water film forming air guiding and pollution reduction device effectively rectifies the flue gas and distributes the airflow evenly, which is conducive to the penetration of clean gas and the downward guidance of dust-laden wastewater to the sewage collection container through the discharge port. The cleanliness of the exhaust air treated by this device meets the industry's expectations. Attached Figure Description

[0018] Figure 1 This is a structural diagram of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 Cross-sectional view;

[0020] Figure 3 for Figure 1 Enlarged view of part A;

[0021] Figure 4 for Figure 1 A schematic diagram of the water supply system is shown. Detailed Implementation

[0022] In order to better understand the technical essence and beneficial effects of this utility model, a detailed description will be given below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0023] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back are based on the current... Figure 1The location and state of the object are taken as examples, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0024] Please see Figure 1 and Figure 2 The diagram shows a dust collector housing 1. A dust-laden gas inlet 12 is connected to the front of the housing 1 for introducing dust-laden gas into the housing cavity 11. An exhaust port 13, communicating with the housing cavity 11, is located at the center of the top of the housing 1 for discharging the dust-collected air from the housing cavity 11. A sludge outlet 13, also communicating with the housing cavity 11, is located at the center of the bottom of the housing 1 for discharging sludge, or sediment, generated from wet treatment for subsequent processing. The system includes a wastewater discharge port 14; a wet dust collector 2 for treating dust-laden gas introduced into the aforementioned dust-laden gas cavity 11 via the dust-laden gas inlet port 12; and a water supply mechanism 3 for supplying water to the wet dust collector 2, mounted on the aforementioned dust collector housing 1 and extending into the cavity 11. This water supply mechanism 3 is fixed to the upper rear side of the aforementioned dust collector housing 1 and connected to a water supply pipeline in use. Here, "connected to a water supply pipeline" refers to connection to a circulating pump that serves as the water source.

[0025] The key technical points of the present invention are as follows: The aforementioned wet dust removal mechanism 2 for dusty flue gas includes a plate spray device 21, a gas-liquid phase separation device 22, an upper water curtain forming device 23, a lower water curtain forming device 24, and a water film forming air guiding and pollution reduction device 25 located within the aforementioned housing cavity 11. The water film forming air guiding and pollution reduction device 25 is fixed to the cavity wall on the opposite side of the middle of the aforementioned housing cavity 11 in the height direction, and there is space between the water film forming air guiding and pollution reduction device 25 and the cavity wall of the housing cavity 11 in all directions. The plate spray device 21 is fixed to the top of the water film forming air guiding and pollution reduction device 25, and the gas-liquid phase separation device 22... The upper water curtain forming device 23 is fixed between the front and rear walls of the box cavity 11 at a position between the upper part of the water film forming air guiding and pollution reduction device 25 and the opposite side of the left and right cavity walls of the box cavity 11. The lower water curtain forming device 24 is fixed between the front and rear walls of the box cavity 11 at a position above the aforementioned lower water curtain forming device 24. The aforementioned water supply mechanism 3 is connected to the aforementioned plate spray device 21 and the water film forming air guiding and pollution reduction device 25. The aforementioned dust-laden flue gas inlet is located at the front side of the dust removal box 1 between the plate spray device 21 and the upper water curtain forming device 23.

[0026] Depend on Figure 1 and Figure 2As shown, since the upper part of the aforementioned dust collector box 1 is formed by an upper frustum 15 and the lower part of the dust collector box 1 is formed by a lower frustum 16, the aforementioned exhaust port 13 is actually located at the top of the upper frustum 15, and the sewage discharge port 14 is actually located at the bottom of the lower frustum 16. Furthermore, the aforementioned upper and lower frustums 15 and 16 are oriented in opposite directions; more specifically, the smaller diameter end of the former faces upwards, while the smaller diameter end of the latter faces downwards. That is, the diameter of the upper frustum 15 gradually narrows (contracts) from bottom to top, while the diameter of the lower frustum 16 gradually narrows (contracts) from top to bottom.

[0027] In actual use, the aforementioned dust collection box 1 can be installed on a separately equipped bracket, or a set of support legs can be fixed to its lower part, or it can be installed in a flue gas dust collection site in other similar ways.

[0028] Inside the aforementioned chamber 11 and located at the lower part of the right cavity wall of the chamber 11, there is a chamber liquid level signal acquisition device 4 for maintaining the liquid level of the water in the chamber 11 to a level that submerges the lower edge of the aforementioned water film forming air guiding and pollution reduction device 25. In use, the chamber liquid level signal acquisition device 4 and the aforementioned water supply mechanism 3 are electrically connected to the electrical controller.

[0029] The applicant should note that if the aforementioned liquid level signal acquisition device 4 of the tank cavity is set at the lower part of the left tank wall, the lower part of the front tank wall, or the lower part of the rear tank wall, it should be considered as an equivalent technical means and still fall within the scope of the technical content disclosed in this utility model.

[0030] Please see Figure 3 And combined Figure 1 and Figure 2 The aforementioned plate-type spray device 21 includes a spray chamber top plate 211, a spray chamber bottom plate 212, and a spray chamber 213. The top and bottom plates 211 and 212 are vertically aligned and of equal size. The perimeter of the spray chamber top and bottom plates 211 and 212 is sealed by a spray chamber side sealing plate 214. The bottom plate 212 is fixed to the top of the aforementioned water film forming air guiding and pollution reduction device 25. Spray holes 2121 are densely arranged on the bottom plate 212. The spray chamber 213 is located within the space formed by the top and bottom plates 211 and 212 and the spray chamber side sealing plate 214. The aforementioned water supply mechanism 3 communicates with the aforementioned spray chamber 213. Figures 1 to 3 As shown, the entire plate spray device 21 has a rectangular structure, that is, the aforementioned spray chamber construction bottom and top, bottom plate 211, 212 are rectangular plates.

[0031] Since the aforementioned plate-type spray device 21 can also be called a water distribution plate, and the spray chamber construction base plate 212 has densely arranged base plate spray holes 2121, when the water supply mechanism 3 introduces circulating water from the aforementioned circulating pump into the spray chamber 213, it is evenly distributed and falls through the base plate spray holes 2121. The small water droplets formed during the falling process come into contact with the dust, playing a good dust suppression role. Furthermore, the base plate spray holes 2121 act as small spray nozzles, thereby reducing the head and power of the circulating pump used as a water source supply device to supply water to the water supply mechanism 3, which helps to save investment.

[0032] See you later Figure 1 and Figure 2 The aforementioned water film forming air guiding and pollution reduction device 25 includes a left baffle 251 and a right baffle 252. The left and right baffles 251 and 252 correspond to each other and are equal in size and height. The left and right baffles 251 and 252 are fixed to the front and rear facing sides of the cavity wall in the middle of the height direction of the aforementioned box cavity 11 (i.e., fixed between the front and rear facing sides of the dust collector box cavity 11). The left and right baffles 251 and 252 are between the left and right cavity walls of the box cavity 11 and the upper and lower parts of the box cavity 11. Each has a space between it, and the space between the opposite sides of the left and right baffles 251 and 252 in the height direction constitutes a liquid-guiding space 253. The lower end of the left baffle 251 is configured as a left orifice plate 2511 with left baffle holes 25111 in a dense state, while the lower end of the right baffle 252 is configured as a right orifice plate 2521 with right baffle holes 25211 in a dense state. In use, the liquid level in the housing cavity 11 submerges the lower edges of the aforementioned left and right orifice plates 2511 and 2521.

[0033] The aforementioned left and right orifice plates 2511 and 2521 can effectively rectify the flue gas, making the airflow evenly distributed. Dust-laden gas and water droplets form a water film due to interception and collision at the positions of the left and right orifice plates 2511 and 2521. Clean gas flows downward through the left and right baffle holes 25111 and 25211 into the aforementioned sewage outlet 14.

[0034] See you later Figure 1 and Figure 2The aforementioned gas-liquid phase separation device 22 is fixed between the front and rear walls of the aforementioned box cavity 11 at a position between the upper part of the aforementioned left baffle 251 and the opposite side of the left cavity wall of the aforementioned box cavity 11, and at a position between the upper part of the aforementioned right baffle 252 and the opposite side of the right cavity wall of the aforementioned box cavity 11. The aforementioned upper water curtain forming device 23 and lower water curtain forming device 24 are located in the aforementioned liquid guiding space 253 between the opposite sides of the left and right baffles 251 and 252. That is to say, the corresponding components of the structural system of the gas-liquid phase separation device 22 are respectively provided between the upper part of the left baffle 251 and the left cavity wall of the box cavity 11 and between the upper part of the right baffle 252 and the right cavity wall of the box cavity 11 (described below); the aforementioned water supply mechanism 3 extends to the upper part of the aforementioned liquid guiding space 253.

[0035] The aforementioned gas-liquid phase separation device 22 includes a set of left gas-liquid phase separation plates 221 and a set of right gas-liquid phase separation plates 222. The set of left gas-liquid phase separation plates 221 is disposed between the upper part of the aforementioned left baffle 251 and the opposite side of the cavity wall of the aforementioned box cavity 11 by spaced-apart bottom left fixing strips 2211. The set of right gas-liquid phase separation plates 222 is disposed between the upper part of the aforementioned right baffle 252 and the opposite side of the cavity wall of the aforementioned box cavity 11 by spaced-apart bottom right fixing strips 2221. The set of left gas-liquid phase separation plates 221 are distributed in a spaced-apart state, and each pair of adjacent left gas-liquid phase separation plates 221 are kept parallel to each other in the length direction. The set of right gas-liquid phase separation plates 222 are also distributed in a spaced-apart state, and each pair of adjacent right gas-liquid phase separation plates 222 are also kept parallel to each other in the length direction.

[0036] Preferably, the upper part of the aforementioned set of left gas-liquid phase separation plates 221 is connected and fixed by spaced-out top left fixing strips 2212, while the upper part of the set of right gas-liquid phase separation plates 222 is connected and fixed by spaced-out top right fixing strips 2222.

[0037] In this embodiment, the cross-sectional shape of the aforementioned set of left gas-liquid phase separation plates 221 and set of right gas-liquid phase separation plates 222 is S-shaped.

[0038] See you later Figure 1 and Figure 2The aforementioned upper water curtain forming device 23 includes a left spray liquid flow plate 231 and a right spray liquid flow plate 232. The left spray liquid flow plate 231 and the right spray liquid flow plate 232 are located in the aforementioned liquid guiding space 253 and are fixed between the aforementioned box cavity 11 and the opposite side of the front and rear cavity walls at a position corresponding to the aforementioned lower water curtain forming device 24. The upper parts of the left and right spray liquid flow plates 231 and 232 in the length direction are joined together, while the lower parts in the length direction are separated from each other. The spray liquid flowing through the left and right spray liquid flow plates 231 and 232 flows downward to the aforementioned lower water curtain forming device 24 in the form of forming a water curtain 5.

[0039] In this embodiment, the aforementioned left and right spray liquid flow plates 231 and 232 are together configured with a cross-sectional shape of ∧.

[0040] Based on the structure of the left and right liquid-flowing plates 231 and 232 of the above-mentioned spray liquid, their function is as follows: while receiving the water sprayed from the left and right spray nozzles 331 and 341 of the left and right spray pipes 33 and 34 of the liquid-drawing space of the water supply mechanism 3 (which will be mentioned below), the water can splash, which is conducive to the full contact between the liquid and the gas. Furthermore, the water is guided to the lower water curtain forming device 24 (which will be described below) to form a water curtain, which means that the dust-laden gas passes through the water curtain for the first time, i.e., through the water curtain 5.

[0041] See you later Figure 1 and Figure 2 The aforementioned water curtain forming device 24 includes a left guide plate 241 and a right guide plate 242. The left guide plate 241 and the right guide plate 242 are located in the aforementioned liquid guiding space 253 and are fixed in an inclined state to the front and rear cavity walls of the aforementioned box cavity 11 at positions corresponding to the left and right liquid flowing plates 231 and 232 of the spray liquid, respectively. The left side of the left guide plate 241 in the length direction is welded and fixed to the side of the left baffle 251 facing the right baffle 252, and the right side of the right guide plate 242 in the length direction is welded and fixed to the side of the right baffle 252 facing the left baffle 251. The aforementioned primary water curtain 5 formed by the downward flow of the aforementioned left and right liquid flowing plates 231 and 232 of the spray liquid forms a secondary water curtain 6 when passing through the left and right guide plates 241 and 242. Figure 2 The flow is downward in the state shown; in this embodiment, the cross-sectional shape of the aforementioned left guide plate 241 and right guide plate 242 is corrugated (also known as "wavy").

[0042] The left and right guide plates 241 and 242 mentioned above help to guide the gas flow. The airflow contracts and collides on the surface with an S-shaped cross-section. The water flow forms a water curtain again at the lower part of the left and right guide plates 241 and 242 (i.e., the aforementioned secondary water curtain 6). The dust-laden gas passes through the secondary water curtain 6 for the second time.

[0043] Please see Figure 4 And combined Figure 1 and Figure 2 The aforementioned water supply mechanism 3 includes a water source pipeline connection main 31, a spray chamber liquid supply connector 32, a liquid inlet space left spray pipe 33, and a liquid inlet space right spray pipe 34. The water source pipeline connection main 31 is fixed to the upper rear side of the aforementioned dust removal box 1 and is connected to a pressurized water source through a pipeline in the use state. One end of the spray chamber liquid supply connector 32 is connected to the aforementioned water source pipeline connection main 31, while the other end extends into the aforementioned spray chamber 213. The liquid inlet space left spray pipe 33 and the liquid inlet space right spray pipe 34 are positioned parallel to each other and correspond to the upper part of the liquid inlet space 253, and are each connected to the aforementioned water source pipeline connection main 31. A left spray nozzle 331 is provided at intervals on the downward-facing side of the liquid inlet space left spray pipe 33, and a right spray nozzle 341 is provided at intervals on the downward-facing side of the liquid inlet space right spray pipe 34.

[0044] The water source pipeline connection main 31 mentioned above is connected to the outlet of the circulating pump, which serves as the water source, through a pipeline during use. The aforementioned pressurized water source is actually the pressure generated by the aforementioned circulating pump.

[0045] Still see Figure 1 and Figure 2 The aforementioned liquid level signal acquisition device 4 for the box cavity includes a high liquid level sensor 41 and a low liquid level sensor 42. In use, the high and low liquid level sensors 41 and 42 are electrically connected to the electrical controller.

[0046] To ensure clarity, the applicant... Figure 2The diagram shows the liquid level 7 (also referred to as "liquid level") at the lower edges of the left and right orifice plates 2511 and 2521 of the submerged water film forming air guiding and pollution reduction device 25. When the liquid level 7 is lower than that detected by the aforementioned low liquid level sensor 42, the low liquid level sensor 42 feeds a signal back to the electrical controller, which then sends a signal to the valve on the pipeline connected to the sewage discharge port 14, causing the valve to close. Conversely, when the liquid level 7 rises to a level detectable by the high liquid level sensor 41, the high liquid level sensor 41 feeds a signal back to the electrical controller, which then sends a signal to the valve on the pipeline connected to the sewage discharge port 14, causing the valve to open. Sludge is discharged from the sewage discharge port 14, and after the sludge is discharged, the liquid level 7 drops, which is then detected by the low liquid level sensor 42 and fed back to the electrical controller, and this process repeats.

[0047] Applicant combined Figures 1 to 4 Briefly describing the dust removal process of this utility model, since the dust-laden flue gas inlet 12 is located on the front side of the dust collector box 1, i.e., on the front wall of the box, it corresponds to the area below the top plate 211 of the spray chamber of the plate spray device 21 of the dust-laden flue gas wet dust removal mechanism 2, and above the liquid inlet space 253 between the left and right baffles 251 and 252 of the water film forming air guiding and pollution reduction device 25, the dust-laden flue gas introduced by the dust-laden flue gas inlet 12 is introduced into the aforementioned area. Furthermore, under the operation of the circulating pump controlled by the electrical controller, the water connected to the outlet pipe of the circulating pump... Water for spraying is introduced into the main pipe 31 of the source pipeline. This water is divided into three streams. One stream is introduced into the spray chamber 213 through the spray chamber supply connector 32. The other two streams are introduced into the spray chamber 213 through the left and right spray pipes 33 and 34 of the liquid inlet space, respectively. The water enters the spray chamber 213 from the liquid inlet space 253 located below the top plate 211 of the spray chamber structure (this liquid inlet space can also be called a "wet dust removal space", as described above). The water is then sprayed into the liquid inlet space 253 through the bottom plate spray holes 2121 on the bottom plate 212 of the spray chamber structure with a shower-like effect, resulting in a dense jet of fine water 8 (8) sprayed out from the bottom plate spray holes 2121. Figure 2 The dust-laden flue gas undergoes its first dust removal process (marked). Simultaneously, left and right spray nozzles 331 and 341, spaced apart at the lower part of the left and right spray pipes 33 and 34 along the length of the aforementioned liquid inlet space, spray the dust-laden flue gas for dust removal. The water sprayed from each left and right spray nozzle 331 and 341 forms a spray water column 9 (…). Figure 2(As shown), thus achieving the second stage of dust removal for the dust-laden flue gas. When the aforementioned spray water column 9 falls onto the left and right liquid flow plates 231 and 232 respectively, it flows downwards from the left and right liquid flow plates 231 and 232 to form the aforementioned first water curtain 5 (its function has been described above), thus achieving the third stage of dust removal. The first water curtain 5 flows to the left and right guide plates 241 and 242 and flows downwards from the left and right guide plates 241 and 242 to form the fourth stage of dust removal, a secondary water curtain 6, which is introduced into the lower liquid surface; this process can be called the fourth stage of dust removal. In this process, the left and right perforated plates 2511 and 2521 at the lower part of the left and right baffles 251 and 252 of the water film forming air guiding and pollution reduction device 25 structure system play the role described in detail above. During the above process, the air located between the left and right guide plates 241 and 242 and the liquid surface 7 rises and passes through a set of left gas-liquid phase separation plates 221 and a set of right gas-liquid phase separation plates 222 of the gas-liquid phase separation device 22. The air mist is separated by the set of left gas-liquid phase separation plates 221 and right gas-liquid phase separation plates 222, so that the mist content or water content in the air exiting the exhaust port 13 is significantly reduced, that is, the humidity of the air discharged from the exhaust port 13 is reduced.

[0048] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A wet dust removal device, comprising a dust removal box body (1), a dust-containing flue gas introduction interface (12) for introducing dust-containing flue gas into a box cavity (11) of the dust removal box body (1) is arranged on the front side of the dust removal box body (1), a gas outlet (13) for discharging the air after dust removal from the box cavity (11) is arranged on the central position of the top of the dust removal box body (1) and communicates with the box cavity (11), and a sludge discharge interface (14) for discharging the sludge generated after the wet treatment for subsequent treatment device is arranged on the central position of the bottom of the dust removal box body (1) and communicates with the box cavity (11); a dust-containing flue gas wet dust removal mechanism (2) for treating the dust-containing flue gas introduced into the box cavity (11) by the dust-containing flue gas introduction interface (12) is arranged in the box cavity (11); a water supply mechanism (3) for supplying dust removal water to the dust-containing flue gas wet dust removal mechanism (2) is arranged on the dust removal box body (1) and extends into the box cavity (11), and the water supply mechanism (3) is fixed on the upper rear side of the dust removal box body (1) and is connected with a water source pipeline in use; characterized in that: The dust-containing flue gas wet dust removal mechanism (2) comprises a plate spraying device (21), a gas-liquid phase separation device (22), an upper water curtain forming device (23), a lower water curtain forming device (24) and a water film forming gas guiding and pollution reducing device (25) located in the box cavity (11), the water film forming gas guiding and pollution reducing device (25) is fixed to the cavity wall of the front and rear opposite sides of the middle part of the height direction of the box cavity (11), and spaces are respectively maintained between the upper and lower left and right of the water film forming gas guiding and pollution reducing device (25) and the cavity wall of the box cavity (11), the plate spraying device (21) is fixed to the top of the water film forming gas guiding and pollution reducing device (25), the gas-liquid phase separation device (22) is fixed between the front and rear cavity walls of the box cavity (11) at a position between the upper part of the water film forming gas guiding and pollution reducing device (25) and the opposite sides of the left and right cavity walls of the box cavity (11), the upper water curtain forming device (23) is fixed between the front and rear cavity walls of the box cavity (11) at a position above the lower water curtain forming device (24), and the lower water curtain forming device (24) is fixed between the front and rear cavity walls of the box cavity (11); the water supply mechanism (3) communicates with the plate spraying device (21) and the water film forming gas guiding and pollution reducing device (25); and the dust-containing flue gas introduction interface is located on the front side of the dust removal box body (1) and corresponds to the position between the plate spraying device (21) and the upper water curtain forming device (23).

2. The wet dust extraction device of claim 1, wherein: The box cavity liquid level signal acquisition device (4) for maintaining the liquid level of water in the box cavity (11) to the extent of submerging the lower edge of the water film forming gas guiding and pollution reducing device (25) is arranged in the box cavity (11) and at the lower part of any one of the front, rear, left and right cavity walls of the box cavity (11), and in the use state, the box cavity liquid level signal acquisition device (4) and the water supply mechanism (3) are electrically connected with the electrical controller.

3. A wet dust extraction device according to claim 1 or 2, characterised in that: The plate type spraying device (21) comprises a spraying cavity construction top plate (211), a spraying cavity construction bottom plate (212) and a spraying cavity (213), the spraying cavity construction top plate (211) and the spraying cavity construction bottom plate (212) correspond to each other and are equal in size, the periphery edge part between the spraying cavity construction top plate (211) and the spraying cavity construction bottom plate (212) is closed by a spraying cavity side sealing plate (214), the spraying cavity construction bottom plate (212) is fixed with the top of the water film shaping air guide and pollution reduction device (25), the bottom plate spraying holes (2121) are densely arranged on the spraying cavity construction bottom plate (212), the spraying cavity (213) is located in the space enclosed by the spraying cavity construction top plate (211), the spraying cavity construction bottom plate (212) and the spraying cavity side sealing plate (214); the water supply mechanism (3) communicates with the spraying cavity (213); the water film shaping air guide and pollution reduction device (25) comprises a left baffle (251) and a right baffle (252), the left baffle (251) and the right baffle (252) correspond to each other and are equal in size and height, the left baffle (251) and the right baffle (252) are fixed with the cavity walls on the front and back sides of the middle part of the height direction of the box cavity (11), the left baffle (251) and the right baffle (252) are spaced from the upper part and the lower part of the box cavity (11) and the left and right cavity walls, and the space between the left baffle (251) and the right baffle (252) on the facing side of the height direction is the liquid guide space (253), wherein the lower end of the left baffle (251) is provided with the left hole plate (2511) with the left baffle holes (25111) densely arranged, and the lower end of the right baffle (252) is provided with the right hole plate (2521) with the right baffle holes (25211) densely arranged, in the use state, the lower edges of the left hole plate (2511) and the right hole plate (2521) are submerged by the liquid level in the box cavity (11); the gas-liquid phase separation device (22) is fixed between the front and back cavity walls of the box cavity (11) at the positions between the upper part of the left baffle (251) and the facing side of the left cavity wall of the box cavity (11) and between the upper part of the right baffle (252) and the facing side of the right cavity wall of the box cavity (11), the upper water curtain forming device (23) and the lower water curtain forming device (24) are located in the liquid guide space (253) between the facing sides of the left baffle (251) and the right baffle (252); the water supply mechanism (3) extends to the upper part of the liquid guide space (253).

4. The wet dust extraction apparatus of claim 3, wherein: The gas-liquid phase separation device (22) comprises a set of left gas-liquid phase separation plates (221) and a set of right gas-liquid phase separation plates (222), the set of left gas-liquid phase separation plates (221) is arranged between the upper part of the left baffle (251) and the opposite side of the cavity wall of the box cavity (11), the set of right gas-liquid phase separation plates (222) is arranged between the upper part of the right baffle (252) and the opposite side of the cavity wall of the box cavity (11), and the set of left gas-liquid phase separation plates (221) is distributed in a spaced state, each two adjacent left gas-liquid phase separation plates (221) are kept left-right parallel in the length direction, the set of right gas-liquid phase separation plates (222) is distributed in a spaced state, and each two adjacent right gas-liquid phase separation plates (222) are also kept left-right parallel in the length direction.

5. The wet dust extraction apparatus of claim 4, wherein: The cross-sectional shape of the set of left gas-liquid phase separation plates (221) and the set of right gas-liquid phase separation plates (222) is S-shaped.

6. The wet dust extraction device of claim 3, wherein: The upper water curtain forming device (23) comprises a left liquid spraying and flowing plate (231) and a right liquid spraying and flowing plate (232), the left liquid spraying and flowing plate (231) and the right liquid spraying and flowing plate (232) are located in the liquid guiding space (253) and are fixed between the opposite sides of the front and rear cavity walls of the box cavity (11) at positions corresponding to the upper part of the lower water curtain forming device (24), wherein the upper part of the length direction of the left liquid spraying and flowing plate (231) and the right liquid spraying and flowing plate (232) is connected to each other, and the lower part of the length direction is separated from each other, and the spraying liquid passing through the left liquid spraying and flowing plate (231) and the right liquid spraying and flowing plate (232) is respectively flowed downward to the lower water curtain forming device (24) in the form of a primary water curtain (5).

7. The wet dust extraction apparatus of claim 6, wherein: The left liquid spraying and flowing plate (231) and the right liquid spraying and flowing plate (232) jointly form a structure with an ∧-shaped cross-sectional shape.

8. The wet dust extraction apparatus of claim 6, wherein: The lower water curtain forming device (24) comprises a left flow guide plate (241) and a right flow guide plate (242), the left flow guide plate (241) and the right flow guide plate (242) are located in the liquid guiding space (253) and are fixed between the opposite sides of the front and rear cavity walls of the box cavity (11) in an opposite corresponding inclined state at positions corresponding to the lower part of the left liquid spraying and flowing plate (231) and the right liquid spraying and flowing plate (232) respectively, and the left side of the length direction of the left flow guide plate (241) is fixed to the side of the left baffle (251) facing the right baffle (252), and the right side of the length direction of the right flow guide plate (242) is fixed to the side of the right baffle (252) facing the left baffle (251), the primary water curtain (5) formed by the downward flowing of the left liquid spraying and flowing plate (231) and the right liquid spraying and flowing plate (232) is flowed downward by the left flow guide plate (241) and the right flow guide plate (242) in the form of a secondary water curtain (6) when passing through the left flow guide plate (241) and the right flow guide plate (242); the cross-sectional shape of the left flow guide plate (241) and the right flow guide plate (242) is corrugated.

9. The wet dust extraction device of claim 3, wherein: The water supply mechanism (3) comprises a water source pipeline connection main pipe (31), a spray cavity liquid supply connector (32), a left liquid space spray pipe (33) and a right liquid space spray pipe (34), the water source pipeline connection main pipe (31) is fixed to the upper rear side of the dust removal box body (1) and connected with a water source with pressure through a pipeline in the use state, one end of the spray cavity liquid supply connector (32) is connected with the water source pipeline connection main pipe (31), and the other end is inserted into the spray cavity (213), the left liquid space spray pipe (33) and the right liquid space spray pipe (34) correspond to the upper part of the liquid space (253) in a parallel state from left to right, and are each connected with the water source pipeline connection main pipe (31), a left spray nozzle (331) is arranged on the downward side of the left liquid space spray pipe (33) in a spaced state, and a right spray nozzle (341) is arranged on the downward side of the right liquid space spray pipe (34) in a spaced state.

10. The wet dust extraction device of claim 2, wherein: The box cavity liquid level signal acquisition device (4) comprises a high liquid level sensor (41) and a low liquid level sensor (42), and the high liquid level sensor (41) and the low liquid level sensor (42) are electrically connected with an electrical controller in the use state.

Images