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] The present invention belongs to the technical field of environmental protection facilities, and particularly relates to a wet dust removal device. Background Art

[0002] Taking iron and steel production enterprises as an example, it is necessary to treat high-concentration dust flue gas containing iron, calcium, silicon oxides, SO2, NO X , heavy metals (such as pb, Zn) and viscous particles (such as Ca(OH2) generated by quicklime digestion). Among them, for the high-temperature flue gas with a temperature of 200-600°C generated in the processes of steel slag hot splashing and heat soaking, wet dust removal is a preferred solution. Wet dust removal, such as using a spray cooling tower and a Venturi scrubber, has a good effect on capturing particulate matter. For example, it is of positive significance to achieve dust removal and desulfurization for sulfides (SO2, HF) in pellet drying flue gas.

[0003] Compared with dry dust removal, wet dust removal can directly cool high-temperature flue gas (such as flue gas above 1000°C generated during steel slag hot splashing) by spraying water, avoiding problems such as high-temperature filter bags or relatively complex pretreatment in dry dust removal. Because dry dust removal usually needs to cool down through a heat exchanger or by mixing cold air first, which will increase the complexity of the system. Wet dust removal can handle the aforementioned viscous substances (CaO, metal oxides) well because the dust generated from pelletizing or steel slag treatment usually has a high moisture content and is accompanied by viscous substances. Wet dust removal has an excellent capture effect on fine particles (such as PM2.5 in sintering flue gas), while dry dust removal is only limited to particulate matter. Wet dust removal is not affected by dust specific resistance, while the dust removal efficiency of dry electrostatic precipitation for high specific resistance dust such as steelmaking dust is not ideal (the efficiency drops significantly). In terms of structure and safety, the wet dust removal device has a relatively compact structure, occupies less space, and has no explosion risk. For flue gas containing flammable gases such as CO and H2 (such as converter gas), dry dust removal needs to take additional explosion-proof measures, while wet dust removal is not necessary.

[0004] As can be seen from the above, although wet dust removal consumes water resources, it is significantly superior to dry dust removal considering comprehensive factors. This may be an important factor for the industry to value wet dust removal.

[0005] In the publicly available Chinese patent literature, technical information related to wet dust removal can be found. For example, CN211133440U recommends "a wet flue gas dust removal device", and CN119793123A provides an exhaust gas treatment device for metallurgical equipment. Typically, such as the "a wet flue gas dust removal device" introduced in CN214597986U, this patent is designed for the dust generated in the rod mill production line in the steel industry. Because according to the national total dust particle emission standard, the centralized emission of particulate matter ≤ 20mg / m 3 , the dust particles in the industrial post ≤ 5mg / m 3 , the prior art using bag dust removal, electrostatic dust removal or electro-bag combined dust removal is both complex and energy-consuming. The equipment installation, transportation and maintenance requirements are strict and the maintenance frequency is high. Therefore, CN214597986U adopts wet dust removal. According to the interpretation of paragraphs 0031 to 0046 of the specification of this patent and according to the drawings of this patent: the dust-containing flue gas is collected by a gas collecting hood and sent into the wet dust removal tower by a blower on the pipeline communicating with the gas collecting hood and the wet dust removal tower. The dust-containing flue gas entering the wet dust removal tower passes through the Venturi rod layer, the spray layer and the washing nozzles of the demisting device from bottom to top and then is discharged from the exhaust port (the patent calls it "exhaust chimney") at the top of the wet dust removal tower. In the above process, the spray layer and the demisting device supply water in a cycle. Although this patent can achieve the technical effects recorded in paragraphs 0023 to 0025 of its specification, there are the following deficiencies: Although the Venturi effect can break the liquid into finer liquid droplets such as 10 - 100μm, thus well increasing the gas-liquid contact area, the requirements for the precision design of the gap and the spray parameters are relatively strict. Specifically, it is more critical of the spray pressure, and the precise control of the liquid-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 large; due to the relatively large rod gap in the Venturi effect, such as usually 20 - 50mm, although it has the advantage of not being easily blocked by sticky dust such as pellet dust, the rod body needs to be replaced after wear; for the treatment of high-temperature, fine, sticky dust and for the efficiency requirements (such as steel slag treatment). In addition, CN214597986U also has a monotonous dust removal link for the flue gas. For example, after the flue gas passes through the Venturi rod layer, it only passes through the spray layer and the demisting layer and is discharged from the exhaust port, and it is impossible to carry out a more beneficial liquid film or water curtain treatment for the dust-containing flue gas. Therefore, the cleanliness requirement of the exhaust gas, that is, the air discharged from the exhaust port, is difficult to meet the industry's expectations. Summary of the Invention

[0006] The object of the present invention is to provide a wet dust removal device which helps to dispense with the use of Venturi rod layers, thereby avoiding picky requirements for gap accuracy, liquid-gas ratio accuracy, and spraying parameters such as spraying pressure, facilitating the avoidance of affecting pressure loss and thus demonstrating a good energy-saving effect, beneficial for ensuring the long-term service life of each component by tending to avoid component replacement, conducive to avoiding picky requirements for properties of flue gas such as temperature, particle size in the flue gas, and viscosity, thereby demonstrating good adaptability to the flue gas to be treated, and helping to make the exhausted air after treatment meet the requirements of the industry expectations, thereby demonstrating ideal environmental protection performance.

[0007] The object of the present invention is achieved in the following way. A wet dust removal device includes a dust removal box body. At the front side of the dust removal box body, there is a dust-containing flue gas inlet interface for introducing the dust-containing flue gas into the cavity of the dust removal box body. At the central position of the top of the dust removal box body, there is an exhaust port communicating with the cavity of the box body for discharging the air after dust removal from the cavity of the box body. And at the central position of the bottom of the dust removal box body, there is a sewage discharge interface communicating with the cavity of the box body for discharging the sludge generated after wet treatment for subsequent treatment by a treatment device. A wet dust removal mechanism for the dust-containing flue gas introduced into the cavity of the box body through the dust-containing flue gas inlet interface is arranged in the cavity of the box body. A water supply mechanism is arranged on the dust removal box body and extends into the cavity of the box body for supplying dust removal water to the wet dust removal mechanism for the dust-containing flue gas. The water supply mechanism is fixed to the upper rear side of the dust removal box body and is connected to the water source pipeline in the use state. It is characterized in that the wet dust removal mechanism for the dust-containing flue gas includes a plate spraying device, a gas-liquid separation device, an upper water curtain forming device, a lower water curtain forming device, and a water film forming and gas guiding and pollution reducing device in the cavity of the box body. The water film forming and gas guiding and pollution reducing device is fixed to the opposite side walls of the front and rear sides in the middle of the height direction of the cavity of the box body, and there are spaces between the upper, lower, left, and right of the water film forming and gas guiding and pollution reducing device and the cavity wall of the box body. The plate spraying device is fixed to the top of the water film forming and gas guiding and pollution reducing device. The gas-liquid separation device is fixed between the front and rear cavity walls of the cavity of the box body at a position between the upper part of the water film forming and gas guiding and pollution reducing device and the opposite sides of the left and right cavity walls of the cavity of the box body. The upper water curtain forming device is fixed between the front and rear cavity walls of the cavity of the box body at a position above the lower water curtain forming device. The lower water curtain forming device is fixed between the front and rear cavity walls of the cavity of the box body. The water supply mechanism communicates with the plate spraying device and the water film forming and gas guiding and pollution reducing device. The dust-containing flue gas inlet interface is located on the front side of the dust removal box body corresponding to the position between the plate spraying device and the upper water curtain forming device.

[0008] In a specific embodiment of the present invention, a liquid level signal acquisition device for the box body cavity is provided at the lower part of any one of the front, rear, left, and right cavity walls of the box body cavity to keep the liquid level of the water in the box body at a level that submerges the lower edge of the water film forming air guiding and pollution reducing device. In the use state, the liquid level signal acquisition device of the box body cavity and the water supply mechanism are electrically connected to the electrical controller.

[0009] In another specific embodiment of the present invention, the plate type spraying device includes a spraying cavity construction top plate, a spraying cavity construction bottom plate, and a spraying cavity. The spraying cavity construction top and bottom plates correspond to each other up and down and are of equal size. The four peripheral edge parts between the spraying cavity construction top and bottom plates are closed by spraying cavity side sealing plates. The spraying cavity construction bottom plate is fixed to the top of the water film forming air guiding and pollution reducing device. Dense bottom spraying holes are formed in the spraying cavity construction bottom plate. The spraying cavity is located in the space jointly formed by enclosing the spraying cavity construction top and bottom plates and the spraying cavity side sealing plates; the water supply mechanism communicates with the spraying cavity; the water film forming air guiding and pollution reducing device includes a left baffle and a right baffle. The left and right baffles correspond to each other and are of equal size and height. The left and right baffles are fixed to the front and rear facing side cavity walls in the middle of the height direction of the box body cavity. Spaces are reserved between the left and right baffles and the left and right cavity walls of the box body, as well as between the upper and lower parts of the box body. The space between the facing sides in the height direction of the left and right baffles constitutes a liquid guiding space. Among them, the lower end of the left baffle is configured as a left orifice plate with dense left baffle holes, and the lower end of the right baffle is configured as a right orifice plate with dense right baffle holes. In the use state, the lower edges of the left and right orifice plates are submerged by the liquid level in the box body cavity; the gas-liquid separation device is fixed between the front and rear cavity walls of the box body cavity at positions between the upper part of the left baffle and the facing side of the left cavity wall of the box body cavity and between the upper part of the right baffle and the facing 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 facing sides of the left and right baffles; the water supply mechanism extends to the upper part of the liquid guiding space.

[0010] In yet another specific embodiment of the present invention, the gas-liquid separation device includes a group of left gas-liquid separation plates and a group of right gas-liquid separation plates. A group of left gas-liquid separation plates are arranged between the upper part of the left baffle and the facing side of the cavity wall of the box body cavity, and a group of right gas-liquid separation plates are arranged between the upper part of the right baffle and the facing side of the cavity wall of the box body cavity. The group of left gas-liquid separation plates are distributed at intervals, and each two adjacent left gas-liquid separation plates are parallel to each other in the length direction. The group of right gas-liquid separation plates are distributed at intervals, and each two adjacent right gas-liquid separation plates are also parallel to each other in the length direction.

[0011] In yet another specific embodiment of the present invention, the cross-sectional shapes of the set of left gas-liquid separation plates and the set of right gas-liquid separation plates are S-shaped.

[0012] In still another specific embodiment of the present invention, the upper water curtain forming device includes a left spray liquid flow plate and a right spray liquid flow plate. The left spray liquid flow plate and the right spray liquid flow plate are located in the liquid guiding space and are fixed between the opposite 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. Among them, the upper parts of the left and right spray liquid flow plates in the length direction are joined to each other, while the lower parts in the length direction are separated from each other. And the spray liquid passing through the left and right spray liquid flow plates flows downward in the form of forming a primary water curtain to the lower water curtain forming device respectively.

[0013] In yet another specific embodiment of the present invention, the left and right spray liquid flow plates together constitute a structure with a cross-sectional shape of ∧-shaped.

[0014] In a further specific embodiment of the present invention, the lower water curtain forming device includes a left guide plate and a right guide plate. The left guide plate and the right guide plate are located in the liquid guiding air and are fixed between the opposite sides of the front and rear cavity walls of the box cavity in an inclined state corresponding to each other at positions respectively corresponding to the lower parts of the left spray liquid flow plate and the right spray liquid flow plate. And the left side of the length direction of the left guide plate is fixed to the side of the left baffle facing the right baffle, while the right side of the length direction of the right guide plate 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 spray liquid flow plates flows downward in a state of forming a secondary water curtain when passing through the left and right guide plates; the cross-sectional shapes of the left guide plate and the right guide plate are corrugated.

[0015] In yet another more specific embodiment of the present invention, the water supply mechanism includes a main water source pipeline connection, a spray chamber liquid supply joint, a left spray pipe in the liquid guiding space, and a right spray pipe in the liquid guiding space. The main water source pipeline connection is fixed to the upper part of the rear side of the dust removal box body and is connected to a pressurized water supply source through a pipeline in the use state. One end of the spray chamber liquid supply joint is connected to the main water source pipeline connection, and the other end extends into the spray chamber. The left spray pipe and the right spray pipe in the liquid guiding space are arranged in a left-right parallel state corresponding to the upper part of the liquid guiding space and are each connected to the main water source pipeline connection. Left spray nozzles are arranged at intervals on the downward side of the left spray pipe in the liquid guiding space, and right spray nozzles are arranged at intervals on the downward side of the right spray pipe in the liquid guiding space.

[0016] In yet another specific embodiment of the present invention, the liquid level signal acquisition device of the box body cavity includes a high liquid level sensor and a low liquid level sensor, and in the use state, the high and low liquid level sensors are electrically connected to the electrical controller.

[0017] The technical effect of the technical solution provided by the present invention is as follows: Since there is no need to use a Venturi rod layer, it is possible to avoid being picky about the clearance accuracy, the liquid-gas ratio accuracy, and the spraying parameters such as the spraying pressure; Since the structure of the wet dust removal mechanism for dust-containing flue gas composed of a plate spraying device, a gas-liquid separation device, an upper water curtain forming device, a lower water curtain forming device, and a water film forming gas guiding and pollution reduction device is reasonable, it will not affect the pressure loss, so a good energy-saving effect can be reflected, and it is beneficial to reflect the advantage of being almost free of component replacement, thus ensuring a long service life; Since the plate spraying device with a water separation tray effect can well achieve the dust removal effect on the dust-containing flue gas introduced through the dust-containing flue gas inlet interface, the gas-liquid separation device can well reduce the water mist in the air discharged from the exhaust port, the upper and lower water curtain forming devices enable the liquid and gas to fully contact to achieve an excellent dust removal effect, and the water film forming gas guiding and pollution reduction device can well rectify the flue gas and make the air flow evenly distributed, which is beneficial to the penetration of clean gas and the downward guiding of dust-containing sewage, and the dust-containing sewage is discharged to the sewage collection container through the sewage discharge interface; The cleaning effect of the exhaust air treated by the device of the present invention can meet the requirements expected by the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an embodiment of the present invention; Figure 2 is Figure 1 a sectional view of; Figure 3 is Figure 1 an enlarged view of part A of; Figure 4 is Figure 1 a schematic diagram of the water supply mechanism shown in. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to more clearly understand the technical essence and beneficial effects of the present invention, detailed descriptions will be given below in the form of embodiments. However, the descriptions of the embodiments are not limitations to the technical solutions of the present invention. Any equivalent transformation that is merely formal rather than substantial based on the concept of the present invention should be regarded as within the scope of the technical solutions of the present invention.

[0020] In the following descriptions, all concepts related to the directionality or orientation such as up, down, left, right, front, and back are based on the current position state of Figure 1 and thus cannot be understood as special limitations to the technical solutions provided by the present invention.

[0021] Please refer to Figure 1and Figure 2 , a dust removal box body 1 is shown. At the front side of the dust removal box body 1, a dust-containing flue gas introduction interface 12 for introducing the dust-containing flue gas into the box cavity 11 of the dust removal box body 1 is connected. At the central position of the top of the dust removal box body 1, an exhaust port 13 communicating with the box cavity 11 for discharging the air after dust removal from the box cavity 11 is connected. And at the central position of the bottom of the dust removal box body 1, a sewage discharge interface 14 communicating with the box cavity 11 for discharging the sludge or silt generated after wet treatment for subsequent treatment by a subsequent treatment device is connected; a dust-containing flue gas wet dust removal mechanism 2 for treating the dust-containing flue gas introduced into the box cavity 11 from the aforementioned dust-containing flue gas introduction interface 12 is shown disposed in the box cavity 11; a water supply mechanism 3 disposed on the aforementioned dust removal box body 1 and extending into the box cavity 11 for supplying dust removal water to the aforementioned dust-containing flue gas wet dust removal mechanism 2 is shown. The water supply mechanism 3 is fixed to the upper rear side of the aforementioned dust removal box body 1 and is connected to a water source pipeline in the use state. Here, the connection with the water source pipeline means the connection with a circulation pump serving as a water supply source.

[0022] As the technical key points of the technical solution provided by the present invention: the aforementioned dust-containing flue gas wet dust removal mechanism 2 includes a plate-type spraying device 21, a gas-liquid 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 aforementioned box cavity 11. The water film forming gas guiding and pollution reducing device 25 is fixed to the opposite side walls of the front and rear sides in the middle of the height direction of the aforementioned box cavity 11, and there is a space between the upper, lower, left, and right of the water film forming gas guiding and pollution reducing device 25 and the box cavity wall of the box cavity 11. The plate-type spraying device 21 is fixed to the top of the water film forming gas guiding and pollution reducing device 25. The gas-liquid 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 aforementioned lower water curtain forming device 24. The lower water curtain forming device 24 is fixed between the front and rear cavity walls of the box cavity 11; the aforementioned water supply mechanism 3 communicates with the aforementioned plate-type spraying device 21 and the water film forming gas guiding and pollution reducing device 25; the aforementioned dust-containing flue gas introduction interface corresponds to the position between the plate-type spraying device 21 and the upper water curtain forming device 23 on the front side of the dust removal box body 1.

[0023] By Figure 1 and Figure 2As shown, since the upper part of the dust removal box body 1 forms a four-sided frustum 15 on the box body, and the lower part of the dust removal box body 1 forms a four-sided frustum 16 on the box body, the aforementioned exhaust port 13 is substantially located at the top of the four-sided frustum 15 on the box body, and the sewage discharge interface 14 is substantially located at the bottom of the four-sided frustum 16 on the box body. In addition, the directions of the aforementioned upper and lower four-sided frustums 15 and 16 on the box body are opposite. Further speaking, the small-diameter end of the former faces upward, while the small-diameter end of the latter faces downward, that is, the diameter of the four-sided frustum 15 on the box body gradually narrows (shrinks) from bottom to top, and the diameter of the four-sided frustum 16 on the box body gradually narrows (shrinks) from top to bottom.

[0024] In the actual use scenario, the aforementioned dust removal box body 1 can be either set on a separately equipped bracket, or a set of legs can be fixed to its lower part or set in the flue gas dust removal site in other similar ways.

[0025] Inside the aforementioned box body cavity 11 and at the lower part of the right cavity wall of the box body cavity 11, a box body cavity liquid level signal acquisition device 4 is provided for keeping the liquid level of the water in the box body 11 at a level that can submerge the lower edge of the aforementioned water film forming gas guiding and pollution reducing device 25. In the use state, the box body cavity liquid level signal acquisition device 4 and the aforementioned water supply mechanism 3 are electrically connected to the electrical controller.

[0026] The applicant needs to explain that: if the aforementioned box body cavity liquid level signal acquisition device 4 is set at the lower part of the left box wall, the lower part of the front box wall or the lower part of the rear box wall, then it should be regarded as an equivalent technical means and still belongs to the scope of the technical content disclosed in the present invention.

[0027] Please refer to Figure 3 and in combination with Figure 1 and Figure 2 , the aforementioned plate type spray device 21 includes a spray cavity construction top plate 211, a spray cavity construction bottom plate 212 and a spray cavity 213. The spray cavity construction top and bottom plates 211 and 212 correspond to each other up and down and are of equal size. The four peripheral edge parts between the spray cavity construction top and bottom plates 211 and 212 are closed by the spray cavity side sealing plates 214. The spray cavity construction bottom plate 212 is fixed to the top of the aforementioned water film forming gas guiding and pollution reducing device 25. Dense bottom plate spray holes 2121 are opened on the spray cavity construction bottom plate 212. The aforementioned spray cavity 213 is located in the space jointly formed by enclosing the spray cavity construction top and bottom plates 211 and 212 and the spray cavity side sealing plates 214; the aforementioned water supply mechanism 3 communicates with the aforementioned spray cavity 213. As Figures 1 to 3 shown, the entire plate type spray device 21 has a rectangular body structure, that is to say, the aforementioned spray cavity construction bottom and top plates 211 and 212 are rectangular plates.

[0028] Since the aforementioned plate-type spray device 21 can also be referred to as a water distribution tray, and the bottom plate spray holes 2121 are densely formed on the spray chamber construction bottom plate 212, after the circulating water from the aforementioned circulating pump is introduced into the spray chamber 213 by the water supply mechanism 3, it is evenly distributed and falls through the bottom plate spray holes 2121. The small water droplets formed during the falling process come into contact with the dust, playing a good role in dust reduction. And the bottom plate spray holes 2121 play the role of small spray nozzles, thereby reducing the head and power of the circulating pump, which is used as a water source providing device for supplying water to the water supply mechanism 3, and helping to save investment.

[0029] Continue to see Figure 1 and Figure 2 As mentioned above, the water film forming air guiding and pollution reducing 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 opposite side walls in the middle of the height direction of the aforementioned box cavity 11 (i.e., fixed between the opposite side walls of the front and rear cavities of the dust removal box body cavity 11). There are spaces between the left and right baffles 251 and 252 and the left and right cavity walls of the box cavity 11, as well as between the upper and lower parts of the box body 11. And the space between the opposite sides in the height direction of the left and right baffles 251 and 252 constitutes a liquid guiding space 253. Among them, the lower end of the left baffle 251 is configured as a left orifice plate 2511 with left baffle holes 25111 formed 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 formed in a dense state. In the use state, the lower edges of the aforementioned left and right orifice plates 2511 and 2521 are submerged by the liquid level in the box cavity 11.

[0030] The aforementioned left and right orifice plates 2511 and 2521 can rectify the flue gas well and evenly distribute the air flow. The dust-containing gas and water droplets form a water film at the positions of the left and right orifice plates 2511 and 2521 due to interception and collision, and the clean gas passes through the left and right baffle holes 25111 and 25211 and flows downward into the aforementioned sewage discharge interface 14.

[0031] Continue to see Figure 1 and Figure 2, the aforementioned gas-liquid separation device 22 is fixed between the front and rear cavity walls of the aforementioned box cavity 11 at a position between the upper part of the aforementioned left baffle 251 and the facing 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 facing side of the right cavity wall of the aforementioned box cavity 11. The aforementioned upper water curtain forming device 23 and the lower water curtain forming device 24 are located in the aforementioned liquid guiding space 253 between the facing sides of the left and right baffles 251 and 252. That is to say, corresponding components (to be described below) of the structural system of the gas-liquid separation device 22 are 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 respectively; the aforementioned water supply mechanism 3 extends to the upper part of the aforementioned liquid guiding space 253.

[0032] The aforementioned gas-liquid separation device 22 includes a group of left gas-liquid separation plates 221 and a group of right gas-liquid separation plates 222. The group of left gas-liquid separation plates 221 is arranged, through the bottom left fixing strips 2211 distributed at intervals, between the upper part of the aforementioned left baffle 251 and the facing side of the cavity wall of the aforementioned box cavity 11. The group of right gas-liquid separation plates 222 is arranged, through the bottom right fixing strips 2221 distributed at intervals, between the upper part of the aforementioned right baffle 252 and the facing side of the cavity wall of the aforementioned box cavity 11. And the group of left gas-liquid separation plates 221 is distributed at intervals, and each two adjacent left gas-liquid separation plates 221 are parallel to each other in the left-right direction in the length direction. The group of right gas-liquid separation plates 222 is distributed at intervals, and each two adjacent right gas-liquid separation plates 222 are also parallel to each other in the left-right direction in the length direction.

[0033] Preferably, the upper parts of the aforementioned group of left gas-liquid separation plates 221 are connected and fixed by the top left fixing strips 2212 distributed at intervals, while the upper parts of the group of right gas-liquid separation plates 222 are connected and fixed by the top right fixing strips 2222 distributed at intervals.

[0034] In this embodiment, the cross-sectional shapes of the aforementioned group of left gas-liquid separation plates 221 and the group of right gas-liquid separation plates 222 are S-shaped.

[0035] Continue to see Figure 1 and Figure 2, the 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 opposite sides of the aforementioned box body cavity 11 and the front and rear cavity walls at a position corresponding to the upper part of the aforementioned lower water curtain forming device 24. Among them, the upper parts of the left and right spray liquid flow plates 231, 232 in the length direction are joined to each other, while the lower parts in the length direction are separated from each other, and the spray liquid passing through them is respectively allowed to flow downward in the form of forming a primary water curtain 5 to the aforementioned lower water curtain forming device 24 by the left and right spray liquid flow plates 231, 232.

[0036] In this embodiment, the aforementioned left and right spray liquid flow plates 231, 232 together constitute a structure with a ∧-shaped cross-sectional shape.

[0037] Based on the structure of the above-mentioned left and right spray liquid flow plates 231, 232, its functions are as follows: while receiving the spray water ejected from the left and right spray nozzles 331, 341 of the left and right spray pipes 33, 34 in the liquid guiding space of the structure system of the water supply mechanism 3 to be mentioned below, it can cause the water to splash everywhere, which is beneficial to the full contact between the liquid and the gas, and guide the water to the aforementioned lower water curtain forming device 24 to form a water curtain, that is, to enable the dust-containing gas to pass through the water curtain for the first time, namely through the primary water curtain 5.

[0038] Continue to see Figure 1 and Figure 2 , the aforementioned lower 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 air 253 and are fixed between the opposite sides of the front and rear cavity walls of the aforementioned box body cavity 11 in an inclined state corresponding to each other at positions respectively corresponding to the lower parts of the left and right spray liquid flow plates 231 and 232. And the left side of the length direction of the left guide plate 241 is welded and fixed to the side of the aforementioned left baffle 251 facing the aforementioned right baffle 252, while the right side of the length direction of the right guide plate 242 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 left and right spray liquid flow plates 231, 232 flows downward in a state of forming a secondary water curtain 6 ( Figure 2 shown) when passing through the left and right guide plates 241, 242; in this embodiment, the cross-sectional shapes of the aforementioned left guide plate 241 and right guide plate 242 are corrugated (also called "rippled").

[0039] The above-mentioned left and right flow guiding plates 241 and 242 help to guide the gas flow. The air flow 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 flow guiding plates 241 and 242 (i.e., the aforementioned secondary water curtain 6), and the dust-containing gas passes through the secondary water curtain 6 for the second time.

[0040] Please refer to Figure 4 and in combination with Figure 1 and Figure 2 The aforementioned water supply mechanism 3 includes a main water source pipeline connection 31, a liquid supply joint 32 for the spray chamber, a left spray pipe 33 in the liquid guiding space, and a right spray pipe 34 in the liquid guiding space. The main water source pipeline connection 31 is fixed to the upper part of the rear side of the aforementioned dust removal box body 1 and is connected to a pressurized water supply source through a pipeline in the use state. One end of the liquid supply joint 32 for the spray chamber is connected to the aforementioned main water source pipeline connection 31, and the other end extends into the aforementioned spray chamber 213. The left spray pipe 33 in the liquid guiding space and the right spray pipe 34 in the liquid guiding space are arranged parallel to each other on the upper part of the liquid guiding space 253 and are each connected to the aforementioned main water source pipeline connection 31. Left spray nozzles 331 are arranged at intervals on the downward side of the left spray pipe 33 in the liquid guiding space, and right spray nozzles 341 are arranged at intervals on the downward side of the right spray pipe 34 in the liquid guiding space.

[0041] The above-mentioned main water source pipeline connection 31 is connected to the outlet of the circulation pump of the circulation pump serving as the water source through a pipeline in the use state. The aforementioned pressurized water supply source is essentially the pressure generated by the aforementioned circulation pump.

[0042] Still refer to Figure 1 and Figure 2 The aforementioned liquid level signal acquisition device 4 for the box chamber includes a high liquid level sensor 41 and a low liquid level sensor 42. In the use state, the high and low liquid level sensors 41 and 42 are electrically connected to the electrical controller.

[0043] For the sake of clear expression, the applicant is Figure 2The liquid level 7 (also referred to as "liquid level") of the lower edges of the left and right orifice plates 2511 and 2521 that show the structural system of the water film forming gas guiding and pollution reducing device 25 is shown. When the liquid level 7 is lower than the level that cannot be detected by the aforementioned low liquid level sensor 42, the low liquid level sensor 42 feeds back a signal to the electrical controller, and the electrical controller gives a signal to the valve on the pipeline connected to the sewage discharge interface 14 to close the valve. Conversely, when the liquid level 7 rises to the level that can be detected by the high liquid level sensor 41, the high liquid level sensor 41 feeds back a signal to the electrical controller, and the electrical controller gives a signal to the valve on the pipeline connected to the sewage discharge interface 14 to open the valve, and the sludge is discharged from the sewage discharge interface 14. After the sludge is discharged, the liquid level 7 decreases, and then it is sensed by the low liquid level signal sensor 42 and the signal is fed back to the electrical controller, and so on.

[0044] The applicant combines Figures 1 to 4 Briefly describe the dust removal process of the present invention. Since the position of the dust-containing flue gas introduction interface 12 on the front side of the dust removal box body 1, that is, on the front box body wall, corresponds to the lower part of the spray chamber construction top plate 211 of the plate type spray device 21 of the structural system of the dust-containing flue gas wet dust removal mechanism 2 and at the same time corresponds to the upper part of the liquid guiding space 253 between the left and right baffle plates 251 and 252 of the structural system of the water film forming gas guiding and pollution reducing device 25, the dust-containing flue gas introduced from the dust-containing flue gas introduction interface 12 is introduced into the aforementioned area. Also, due to the operation of the circulating pump controlled by the electrical controller, the water for spraying is introduced from the main pipe 31 of the water source pipeline connected to the outlet pipeline of the circulating pump. The water for spraying is divided into three paths. One path is introduced into the spray chamber 213 through the spray chamber liquid supply joint 32, and the other two paths are respectively led to the water that enters the spray chamber 213 above the lower part of the left and right spray pipes 33 and 34 distributed at intervals in the length direction of the liquid guiding space 253 (this liquid guiding space can also be referred to as the "wet dust removal space", the same as the above example) through the left and right spray nozzles 331 and 341 at the lower part of the left and right spray pipes 33 and 34. The water sprayed from the bottom plate spray holes 2121 on the bottom plate 212 of the spray chamber construction is sprayed into the liquid guiding space 253 with the shower effect of a shower head, so that the dense fine water column 8 ( Figure 2 marked) performs the first stage of dust removal on the dust-containing flue gas. At the same time, the left and right spray nozzles 331 and 341 distributed at intervals in the lower part of the length direction of the left and right spray pipes 33 and 34 in the aforementioned liquid guiding space spray and dust-remove the dust-containing flue gas, and the water sprayed from each of the left and right spray nozzles 331 and 341 forms a spray water column 9 ( Figure 2As shown in the figure), the second dust removal of the dusty flue gas is thus achieved. When the aforementioned spray water column 9 falls onto the left and right liquid dripping plates 231 and 232 of the spray liquid respectively, it flows downward along the left and right liquid dripping plates 231 and 232 of the spray liquid to form the aforementioned first water curtain 5 (the function has been described above), thus achieving the third dust removal. The primary water curtain 5 flows to the left and right diversion plates 241 and 242 and falls downward along the left and right diversion plates 241 and 242 to form the secondary water curtain 6 for the fourth dust removal, and is introduced into the liquid surface below. This process can be called the fourth dust removal. During this process, the left and right orifice plates 2511 and 2521 at the lower parts of the left and right baffles 251 and 252 of the structural system of the water film forming gas guiding and pollution reducing device 25 play the roles that the applicant has described in detail above. During the above process, the air between the lower part of the left and right diversion plates 241 and 242 and above the liquid surface 7 rises and can separate the aerosol when passing through a group of left gas-liquid separation plates 221 and a group of right gas-liquid separation plates 222 of the structural system of the gas-liquid separation device 22, so that the fog content or water content in the air from the exhaust port 13 is significantly reduced, that is, the humidity of the air discharged from the exhaust port 13 is reduced.

[0045] In summary, the technical solution provided by the present invention makes up for the deficiencies in the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A wet dust removal device, comprising a dust removal box body (1), a dust removal box body (1) having a dust removal gas introduction interface (12) connected to the front side thereof for introducing dust-containing fume into a box body cavity (11) of the dust removal box body (1), an exhaust port (13) connected to the box body cavity (11) and used to discharge the dust-removed air out of the box body cavity (11) is connected to the center of the top of the dust removal box body (1), and a discharge port (13) connected to the box body cavity (11) is connected to the center of the bottom of the dust removal box body (1) for discharging sludge generated by wet treatment for subsequent use A sewage discharge interface (14) treated by a treatment device; a dust-containing flue gas wet dust removal mechanism (2) arranged in the box cavity (11) for treating the dust-containing flue gas introduced into the box cavity (11) through the dust-containing flue gas introduction interface (12); a water supply mechanism (3) arranged on the dust removal box body (1) and extending into the box cavity (11) for providing dust removal water to the dust-containing flue gas wet dust removal mechanism (2), the water supply mechanism (3) being fixed to the upper rear side of the dust removal box body (1) and connected to a water source pipeline when in use; characterized in that: The dust-containing flue gas wet dust removal mechanism (2) comprises a plate-type 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-reducing device (25) located in the box cavity (11); the water film forming air-guiding and pollution-reducing device (25) is fixed to the cavity wall on the front and rear sides of the middle part of the height direction of the box cavity (11), and there is space between the upper, lower, left and right sides of the water film forming air-guiding and pollution-reducing device (25) and the cavity wall of the box cavity (11); the plate-type spray device (21) is fixed to the top of the water film forming air-guiding and pollution-reducing device (25); the gas-liquid phase separation device (22) is located at the water film forming air-guiding and pollution-reducing device (25) The position between the upper part of the pollution removal device (25) and the left cavity wall and the right cavity wall of the box cavity (11) facing each other is fixed between the front and rear 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); 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) is connected to the plate-type spray device (21) and the water film forming air guide and pollution reduction device (25); the position of the dust-containing flue gas introduction interface on the front side of the dust removal box body (1) corresponds to the position between the plate-type spray device (21) and the upper water curtain forming device (23).

2. The wet dust removal device according to claim 1, characterized in that: A box cavity liquid level signal acquisition device (4) is provided 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). The device is used to keep the liquid level of water in the box (11) at a level that submerges the lower edge of the water film forming air-guiding and pollution-reducing device (25). In a state of use, the box cavity liquid level signal acquisition device (4) and the water supply mechanism (3) are electrically connected to the electrical controller.

3. The wet dust removal device according to claim 1 or 2, characterized in that: The plate-type spray device (21) comprises a spray chamber construction top plate (211), a spray chamber construction bottom plate (212) and a spray chamber (213). The spray chamber construction top and bottom plates (211, 212) correspond to each other up and down and are equal in size. The surrounding edges between the spray chamber construction top and bottom plates (211, 212) are closed by spray chamber side sealing plates (214). The spray chamber construction bottom plate (212) is fixed to the top of the water film forming air guide pollution reduction device (25). The bottom plate spray holes (2121) are densely opened on the spray chamber construction bottom plate (212). The spray chamber (213) is located The spray chamber is in a space formed by the top and bottom plates (211, 212) of the spray chamber and the side sealing plate (214) of the spray chamber; the water supply mechanism (3) is in communication with the spray chamber (213); the water film forming air guiding and pollution reducing device (25) comprises a left baffle plate (251) and a right baffle plate (252); the left and right baffle plates (251, 252) correspond to each other and are equal in size and height; the left and right baffle plates (251, 252) are fixed to the cavity wall on the front and rear sides of the middle part of the height direction of the box cavity (11); the left and right baffle plates (251, 252) are fixed to the left and right sides of the box cavity (11); Space is maintained between the right cavity wall and the upper and lower parts of the box body (11), and the space between the opposite sides of the left and right baffles (251, 252) in the height direction constitutes a liquid introduction space (253), wherein the lower end of the left baffle (251) is constituted as a left orifice plate (2511) with left baffle holes (25111) densely opened, and the lower end of the right baffle (252) is constituted as a right orifice plate (2521) with right baffle holes (25211) densely opened. In a use state, the liquid level in the box body cavity (11) submerges the lower edges of the left and right orifice plates (2511, 2521) The gas-liquid phase separation device (22) is fixed between the front and rear walls of the box cavity (11) at a position between the upper part of the left baffle plate (251) and the opposite side of the left cavity wall of the box cavity (11) and at a position between the upper part of the right baffle plate (252) and the opposite 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 introduction space (253) between the opposite sides of the left and right baffle plates (251, 252); the water supply mechanism (3) extends to the upper part of the liquid introduction space (253).

4. The wet dust removal device according to claim 3, characterized in that: The gas-liquid phase separation device (22) comprises a group of left gas-liquid phase separation plates (221) and a group of right gas-liquid phase separation plates (222), wherein the group of left gas-liquid phase separation plates (221) are arranged between the upper part of the left baffle plate (251) and the opposite side of the cavity wall of the box cavity (11), and the group of right gas-liquid phase separation plates (222) are arranged between the upper part of the right baffle plate (252) and the opposite side of the cavity wall of the box cavity (11), and the group of left gas-liquid phase separation plates (221) are distributed in a spaced state, and each two adjacent left gas-liquid phase separation plates (221) remain parallel to each other in the length direction, and the group of right gas-liquid phase separation plates (222) are distributed in a spaced state, and each two adjacent right gas-liquid phase separation plates (222) also remain parallel to each other in the length direction.

5. The wet dust removal device according to claim 4, characterized in that: The cross-sectional shape of the group of left gas-liquid phase separation plates (221) and the group of right gas-liquid phase separation plates (222) is S-shaped.

6. The wet dust removal device according to claim 3, characterized in that: The upper water curtain forming device (23) comprises a left dripping plate (231) for spraying liquid and a right dripping plate (232) for spraying liquid, wherein the left dripping plate (231) and the right dripping plate (232) for spraying liquid are located in the liquid introduction space (253) and are fixed between the box cavity (11) and the opposite sides of the front and rear cavity walls at a position corresponding to the upper side of the lower water curtain forming device (24), wherein the upper parts of the left and right dripping plates (231, 232) for spraying liquid are connected to each other in the length direction, while the lower parts in the length direction are separated from each other, and the left and right dripping plates (231, 232) for spraying liquid passing thereon each form a primary water curtain (5) and flow downward to the lower water curtain forming device (24).

7. The wet dust removal device according to claim 6, characterized in that: The left and right liquid dripping plates (231, 232) of the spraying liquid together form a structure with a cross-sectional shape in the shape of a letter "∧".

8. The wet dust removal device according to claim 6, characterized in that: The lower water curtain forming device (24) comprises a left guide plate (241) and a right guide plate (242), wherein the left guide plate (241) and the right guide plate (242) are located in the liquid induction air (253) and are fixed between opposite sides of the front and rear cavity walls of the box cavity (11) in a corresponding inclined state at positions corresponding to the lower sides of the left drip plate (231) and the right drip plate (232) of the spray liquid, respectively, and the left side of the left guide plate (241) in the length direction is aligned with the left baffle plate (251) toward the liquid induction air (253). One side of the right baffle plate (252) is fixed, and the right side of the right guide plate (242) in the length direction is fixed to the side of the right baffle plate (252) facing the left baffle plate (251); the primary water curtain (5) formed by the left and right drip plates (231, 232) of the spray liquid flowing downward flows downward from the left and right drip plates (241, 242) to form a secondary water curtain (6); the cross-section of the left guide plate (241) and the right guide plate (242) is in a corrugated shape.

9. The wet dust removal device according to claim 3, characterized in that: The water supply mechanism (3) comprises a water source pipeline connecting main pipe (31), a spray chamber liquid supply joint (32), a liquid inlet space left spray pipe (33) and a liquid inlet space right spray pipe (34). The water source pipeline connecting main pipe (31) is fixed to the upper rear side of the dust removal box body (1) and is connected to a pressurized water supply source through a pipeline when in use. One end of the spray chamber liquid supply joint (32) is connected to the water source pipeline connecting main pipe (31), and the other end is inserted into the In the spray chamber (213), the left spray pipe (33) of the liquid inlet space and the right spray pipe (34) of the liquid inlet space correspond to the upper part of the liquid inlet space (253) in a state parallel to each other and are respectively connected to the water source pipeline connecting main pipe (31); a left spray nozzle (331) is arranged in a spaced state on the side of the left spray pipe (33) of the liquid inlet space facing downward, and a right spray nozzle (341) is arranged in a spaced state on the side of the right spray pipe (34) of the liquid inlet space facing downward.

10. The wet dust removal device according to claim 2, characterized in that: The tank cavity liquid level signal acquisition device (4) comprises a high liquid level sensor (41) and a low liquid level sensor (42). In a use state, the high and low liquid level sensors (41, 42) are electrically connected to an electrical controller.

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