A separation device based on boiler tail flue and its use method

Abstract

The present invention discloses a separation device for a boiler tail flue and a method for using the device, which relates to the field of flue gas separation technology. The device comprises a first separation mechanism and a second separation mechanism. The second separation mechanism comprises a box-type shell fixed to the top position of the first separation mechanism, a water reservoir fixed to the inner cavity of the box-type shell, a water spraying member arranged on the inner walls of both sides of the box-type shell, and a separation component installed inside the water reservoir. The bottom end of the water reservoir is in the shape of a cone that tilts upward along both sides. The present invention forms a parabolic water curtain above the box-type shell by connecting and installing the box-type shell at the top of the first separation mechanism, utilizing the water spraying members arranged on the inner walls of both sides of the box-type shell and the water reservoir arranged in the middle position, so that the flue gas can be washed when it is transmitted upward. At the same time, utilizing the cone surface at the bottom end of the water reservoir and the washing waste water stored therein, preliminary dust removal and heat exchange can be performed before the flue gas is washed, thereby effectively eliminating small particles of smoke and water vapor in the flue gas.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas separation, and in particular to a separation device based on a boiler tail flue and a method of using the same. Background Art

[0002] At present, the exhaust port of the boiler needs to be equipped with a flue so that the flue gas generated in the boiler can be discharged outward along the flue. The flue gas contains a large amount of smoke dust. If it is not treated and directly discharged, it will cause environmental pollution. More seriously, it will cause harm to human health. Therefore, a separation device needs to be installed on the flue at the tail end of the boiler to separate the smoke dust contained in the flue gas.

[0003] Most of the separation devices used in the existing boiler tail flue are cyclone separators. The flue gas generates a rotating motion in the separator, and the smoke dust is separated and falls in the flue gas by the principle of centrifugal force. However, this separation method can only handle large particles of smoke dust. Some smaller particles of smoke dust are difficult to separate from the flue gas by centrifugal means, resulting in the separation effect of the separation device on the flue gas discharged from the boiler tail flue being unsatisfactory. Therefore, a separation device based on the boiler tail flue and a method for using the same are proposed. Summary of the Invention

[0004] The object of the present invention is to provide a separation device based on the tail flue of a boiler and a method of using the same to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a separation device based on the tail flue of a boiler, comprising:

[0006] a first separation mechanism;

[0007] The second separation mechanism includes a box-type shell fixed to the top position of the first separation mechanism, a water tank fixed to the inner cavity of the box-type shell, a water spraying member arranged on the inner walls of both sides of the box-type shell and spraying water to the water tank to form a water curtain, and a separation component installed inside the water tank to collect smoke and dust in the wastewater. The bottom end of the water tank is in the shape of a cone that tilts upward along both sides, and the air inlet arranged at the bottom of the box-type shell is located in the middle position below the water tank and is in the shape of a long strip.

[0008] Preferably, the separation component comprises:

[0009] A filter-type conveyor belt, wherein the filter-type conveyor belt is horizontally arranged at the top of the inner cavity of the water reservoir, and one end of the filter-type conveyor belt extends to the outside of the water reservoir;

[0010] A scraper blade, the scraper blade being slidably attached to the end surface of the filter-type conveyor belt extending to the outside of the water reservoir;

[0011] The dust box is detachably plugged into the side wall of the box-type shell. The side wall of the dust box extends into the box-type shell and is fixedly connected to the bottom of the scraper blade, so that the smoke and dust scraped off the surface of the scraper blade falls into the dust box for temporary storage.

[0012] Preferably, the separation component also includes a water diversion hood, and the two water diversion hoods are symmetrically arranged. The top of the water diversion hood facing the water spraying part is horizontally raised and has an L-shaped water inlet channel. The L-shaped water inlet channel extends downward along the inside of the water diversion hood to connect with the top of the filter-type conveyor belt, and a water diversion bend is provided at the bottom of one side of the water diversion hood, which bends toward the inside of the L-shaped water inlet channel.

[0013] Preferably, a conical cover is provided on the outer wall of the water reservoir, a heat-conducting cavity is provided between the conical cover and the water reservoir, a plurality of connecting ribs are provided at intervals in the heat-conducting cavity, and the two ends of the plurality of connecting ribs are fixedly connected to the water reservoir and the opposite side of the conical cover respectively. The water reservoir, the conical cover and the connecting ribs are all made of heat-conducting metal, and the water reservoir is bent outward on both sides toward the water spraying part, and the top of the outward bent part of the water reservoir is a sloped surface.

[0014] Preferably, both side walls of the water reservoir are provided with long through grooves, a long plate is rotatably connected in the long through grooves, one end of the long plate extends into the interior of the water reservoir and is fixedly connected to the inner wall of the water reservoir with a spring member, the other end of the long plate extends into the heat-conducting cavity and is fixedly connected to a knocking ball, a plurality of alloy columns are inserted at intervals on the filter belt of the filter-type conveyor belt, both ends of the alloy columns are rounded and extend outward to a position where the side walls of the long plate can be pressed against;

[0015] The interior of the knocking ball is a hollow structure, a vibration ball is movably provided inside the knocking ball, and an elastic connecting piece is fixedly connected between the outer wall of the vibration ball and the inner wall of the knocking ball.

[0016] Preferably, the water spraying member includes:

[0017] Spray pipes, there are two spray pipes and they are fixedly connected to the top of the inner wall on both sides of the box-type shell, and one end of the two spray pipes is connected to the external pump body through a tee pipe;

[0018] Multiple duckbill nozzles are fixedly connected to the outer wall of the spray pipe at horizontal intervals, and an arc-shaped water outlet is provided on the side of the duckbill nozzle away from the spray pipe, so that the liquid is sprayed in a fan shape from the duckbill nozzle into the port of the L-shaped water inlet channel.

[0019] Preferably, an overflow outlet is provided on the inner wall of the water reservoir close to the filter-type conveyor belt, and the overflow outlet is located below the filter-type conveyor belt. A drainage pipe is fixedly connected to the outer wall of the box-type shell, and one end of the drainage pipe extends into the box-type shell and is fixedly connected to the overflow outlet on the outer wall of the water reservoir. An air outlet pipe is fixedly connected to the top of the box-type shell, and an exhaust fan is installed in the air outlet pipe.

[0020] Preferably, a deflector is fixedly connected to the bottom of the inner cavity of the box-type shell, a streamlined through-groove communicating with the upper and lower sides of the deflector is opened in the middle of the deflector, and the width and diameter of the streamlined through-groove decrease from bottom to top, the length of the streamlined through-groove is less than the length of the water reservoir, and the outer walls on both sides of the deflector are sloped, and the outer walls on both sides of the deflector are provided with V-shaped slopes;

[0021] A quadrangular prism is horizontally provided in the middle position between the conical cover and the deflector cover, and both ends of the quadrangular prism are fixed to the inner wall of the box-type shell. The width of the quadrangular prism is greater than the width of the streamlined through-groove port. The top and bottom ends of the quadrangular prism are both V-shaped surfaces, and the bending angle of the top end of the quadrangular prism is greater than the bending angle of the bottom end of the quadrangular prism.

[0022] Preferably, the first separation mechanism comprises:

[0023] A cyclone separation housing, wherein the cyclone separation housing is wide at the top and narrow at the bottom, the top of the cyclone separation housing is fixedly connected to the box-type housing, and the bottom of the cyclone separation housing is fixedly connected to a dust outlet pipe;

[0024] The air inlet pipe is horizontally fixed and connected to the top of the outer wall of the cyclone separation shell, so that the smoke enters from the air inlet pipe and flows along the inner wall of the cyclone separation shell to form a rotating motion.

[0025] Another invention, the present invention also provides a method for using a separation device for a boiler tail flue, comprising the following steps:

[0026] In step 1, the flue gas in the tail flue of the boiler enters the cyclone separation shell through the air inlet pipe and rotates. The smoke dust in the flue gas is thrown to the inner wall of the cyclone separation shell by the centrifugal principle and adheres to it. It falls due to gravity and falls into the dust outlet pipe from the bottom of the cyclone separation shell. After rotating to the bottom of the cyclone separation shell, the flue gas is transported upward to the box-type shell.

[0027] In step 2, after the flue gas enters the box-type shell, it is transmitted vertically upward from the streamlined slot of the guide cover, collides with the outer wall of the conical cover, and continues to move upward along both sides of the conical cover. When the flue gas contacts the surface of the conical cover, some small particles of smoke dust adhere to the surface of the conical cover, and heat is exchanged with the conical cover at the same time, separating the water vapor in the flue gas;

[0028] In step three, the liquid in the spray pipe is sprayed toward the water hood through multiple duckbill nozzles, thereby forming a parabolic water curtain between the spray pipe and the water hood, so that the flue gas can be washed when passing through the water curtain, which not only effectively separates small particles of smoke and dust in the smoke, but also further separates water vapor in the smoke. The washed liquid is injected from the L-shaped water inlet channel port and flows downward along the inner wall of the L-shaped water inlet channel. The water diversion bend is used to make the liquid slide along the inner wall of the L-shaped water inlet channel to the surface of the filter conveyor belt to avoid splashing caused by excessive impact of the liquid. At the same time, the filter conveyor belt moves relative to the scraper blade, and the smoke dust particles filtered in the wastewater slide from the scraper blade position to the dust box for temporary storage. The washing wastewater filtered by the filter conveyor belt is collected in the water tank, and heat exchange with the conical mask is achieved through the connecting rib plate, so that the conical mask can continuously separate water vapor in the flue gas.

[0029] Step 4: Since alloy columns are installed on the filter belt of the filter conveyor belt, the ends of the alloy columns squeeze the side walls of the long plates as the filter conveyor belt runs, causing the long plates to rotate and separating the knocking balls from the inner wall of the conical cover. When the alloy columns are completely separated from the long plates, the long plates immediately rotate using the elastic thrust of the spring parts, driving the knocking balls to hit the inner wall of the conical cover, causing the conical cover to vibrate, thereby shaking the liquid and smoke attached to the lower surface of the conical cover to fall onto the guide cover for collection.

[0030] Compared with the prior art, the technical effects of the present invention are:

[0031] (1) The present invention connects and installs a box-type shell at the top of the first separation mechanism, and utilizes the water spraying parts arranged on the inner walls of both sides of the box-type shell and the water reservoir arranged in the middle position to form a parabolic water curtain above the box-type shell, so that the flue gas can be washed when it is transmitted upward, thereby separating water vapor and small particles of smoke dust in the flue gas. At the same time, the conical surface at the bottom end of the water reservoir and the washing waste water stored therein can be used to perform preliminary dust removal and heat exchange before the flue gas is washed, thereby effectively eliminating small particles of smoke dust and water vapor in the flue gas and improving the separation efficiency and quality.

[0032] (2) The present invention can filter smoke particles contained in washing wastewater through a filter-type conveyor belt and a water inlet cover with an L-shaped water inlet channel and a water inlet bend on the filter-type conveyor belt. At the same time, the circular motion of the filter-type conveyor belt is combined with the alloy column, the long strip and the vibration ball to periodically knock the conical cover to generate vibration, and the vibration is used to reduce the adhesion of smoke particles and condensed water on the lower surface of the conical cover, thereby ensuring the separation effect of the conical cover on smoke particles and water vapor in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2It is a schematic diagram of the internal three-dimensional cross-sectional structure of the box-type housing of the present invention.

[0035] Figure 3 It is a partial three-dimensional cross-sectional structural schematic diagram of the water reservoir of the present invention.

[0036] Figure 4 For the present invention Figure 2 Schematic diagram of the local enlarged structure at point A.

[0037] Figure 5 It is a semi-stereoscopic cross-sectional structural schematic diagram of the water induction cover of the present invention.

[0038] Figure 6 It is a partial three-dimensional cross-sectional structural schematic diagram of the water reservoir box cone cover of the present invention.

[0039] Figure 7 It is a schematic diagram of the three-dimensional structure of the long strip of the present invention.

[0040] Figure 8 For the present invention Figure 1 Schematic diagram of the local enlarged structure at point B.

[0041] Figure 9 It is a schematic diagram of the three-dimensional structure of the air guide cover of the present invention.

[0042] In the figure: 100, first separation mechanism; 101, cyclone separation housing; 102, air inlet pipe; 103, dust outlet pipe; 200, second separation mechanism; 201, box-type housing; 202, flow guide cover; 203, water reservoir; 204, water guide cover; 205, spray pipe; 206, duckbill nozzle; 207, L-shaped water inlet channel; 208, water guide bend; 209, cone cover; 210, guide Hot cavity; 211, connecting rib plate; 212, filter-type conveyor belt; 213, scraper blade; 214, dust collection box; 215, alloy column; 216, long through-slot; 217, long plate; 218, knocking ball; 219, vibrating ball; 220, elastic connector; 221, streamlined through-slot; 222, quadrangular prism; 223, V-shaped slope; 224, drainage pipe; 225, exhaust pipe. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] The present invention provides Figures 1-9The separation device shown is based on the tail flue of the boiler, including a first separation mechanism 100 and a second separation mechanism 200. The first separation mechanism 100 includes a cyclone separation shell 101. The cyclone separation shell 101 is wide at the top and narrow at the bottom. The top of the cyclone separation shell 101 is fixedly connected to the box-type shell 201. The bottom of the cyclone separation shell 101 is fixedly connected to a dust outlet pipe 103. The air inlet pipe 102 is horizontally fixedly connected to the top of the outer wall of the cyclone separation shell 101, so that the flue gas enters from the air inlet pipe 102 and flows along the inner wall of the cyclone separation shell 101 to form a rotating motion. The flue gas enters the cyclone separation shell 101 from the air inlet pipe 102. Due to the air inlet pipe 102, the flue gas enters the cyclone separation shell 101. 02 is tangential to the side wall of the cyclone separation housing 101, so that the flue gas enters the inner wall of the cyclone separation housing 101 at a preset speed and angle, thereby forming a rotational motion in the cyclone separation housing 101, so that the centrifugal effect can be used to make the large particles of smoke in the flue gas be thrown to the inner wall of the cyclone separation housing 101 and adhere to and gather, thereby falling and separating from the flue gas by gravity, and the flue gas that rotates to the bottom of the cyclone separation housing 101 is vertically transmitted upward into the box-type housing 201 of the second separation mechanism 200 for downward separation; the second separation mechanism 200 includes a box-type housing 201 fixed to the top position of the first separation mechanism 100, a box-type housing 201 fixed to the box-type housing 201 The water reservoir 203 in the inner cavity, the water spraying parts arranged on the inner walls of both sides of the box-type shell 201 and spraying water into the water reservoir 203 to form a water curtain, and the separation component installed inside the water reservoir 203 to collect the smoke dust in the wastewater, the bottom end of the water reservoir 203 is in the shape of a cone inclined upward along both sides, and the air inlet arranged at the bottom of the box-type shell 201 is located in the middle position below the water reservoir 203 and is in the shape of a long strip; after the flue gas enters the box-type shell 201 from the cyclone separation shell 101, it can collide with the cone surface at the bottom end of the water reservoir 203 through directional transmission, which not only increases the contact area so that the water vapor in the flue gas can be separated by the temperature difference between the flue gas and the water reservoir 203, but also Due to the contact and collision between the smoke and the cone surface, some small particles of smoke can aggregate to increase their diameter. Combined with the adhesion effect of the cone surface on the smoke, some smoke in the smoke can be separated; then the smoke is transmitted vertically upward along the cone surface at the bottom of the water reservoir 203 on both sides, and water is sprayed into the water reservoir 203 through the water spraying component to form a parabolic water curtain. The smoke can achieve the purpose of washing by contacting the water curtain during the rising process. Not only heat exchange is used to separate water vapor in the smoke, but also some water-soluble smoke can be separated from the smoke and dissolved in the liquid, and enter the water reservoir 203 with the impact force of the liquid, and then the smoke is separated by the solid-liquid separation action of the separation component.

[0045] Among them, the water spraying part includes a spray pipe 205, which is two and fixedly connected to the top of the inner wall on both sides of the box-type shell 201. One end of the two spray pipes 205 is connected to the external pump body through a tee pipe. A plurality of duckbill nozzles 206 are fixedly connected to the outer wall of the spray pipe 205 at horizontal intervals. The duckbill nozzle 206 is provided with an arc-shaped water outlet on the side away from the spray pipe 205, so that the liquid is sprayed from the duckbill nozzle 206 in a fan shape to the port of the L-shaped water inlet channel 207. The duckbill nozzle 206 is flat, and with its arc-shaped water outlet on the end face, the liquid in the spray pipe 205 can be sprayed in a fan shape from the duckbill nozzle 206. Then, with the intersection of the liquids sprayed from the duckbill nozzle 206, a water curtain covering a large area can be formed, so that the smoke can be effectively washed when passing through the water curtain. The two spray pipes 205 can be connected to the outside of the box-type housing 201 through a tee pipe, so that the external water source can be conveniently transported through the pipeline and the pump body.

[0046] Furthermore, a deflector 202 is fixedly connected to the bottom of the inner cavity of the box-type shell 201, and a streamlined through groove 221 is provided in the middle of the deflector 202, which is connected to the upper and lower sides of the deflector 202, and the width and diameter of the streamlined through groove 221 decrease from bottom to top, and the length of the streamlined through groove 221 is less than the length of the water reservoir 203. The outer walls on both sides of the deflector 202 are sloped, and the outer walls on both sides of the deflector 202 are provided with V-shaped slopes 223. The arrangement of the streamlined through groove 221 gradually reduces the smoke circulation space, which The compression and supercharging effect helps the smoke to rise, and the outer wall of the guide cover 202 is sloped and matched with the V-shaped slope 223, which can converge the smoke and liquid falling on the surface of the guide cover 202, so that the smoke can be concentrated in one place. At this time, a discharge pipe with a valve or a pipe plug can be set at the corresponding position of the outer wall of the box-type shell 201 and the V-shaped slope 223, so that the centralized discharge of waste and waste liquid can be facilitated, eliminating the tedious cleaning inside the box-type shell 201 and reducing the difficulty of cleaning; A quadrangular column 222 is horizontally provided in the middle position between the cover 209 and the guide cover 202. The two ends of the quadrangular column 222 are fixed to the inner wall of the box-type shell 201. The width of the quadrangular column 222 is greater than the width of the port of the streamlined groove 221. The top and bottom ends of the quadrangular column 222 are both V-shaped surfaces, and the bending angle of the top end of the quadrangular column 222 is greater than the bending angle of the bottom end of the quadrangular column 222. The setting of the cone surface at the bottom of the quadrangular column 222 can initially disperse and guide the smoke rising from the streamlined groove 221, so that the smoke can be discharged from the cone surface. The inclined surfaces on both sides of the cover 209 rise, and the conical surface on the upper part of the quadrangular prism 222 can play a diversion role, so that the smoke and dust gathered on the lower surface of the conical cover 209 are gathered with the water droplets at the position of the conical surface connection line at the bottom end of the conical cover 209 and then fall onto the upper conical surface of the quadrangular prism 222, thereby sliding along its conical surface instead of falling into the streamlined groove 221, thereby enhancing the protection. The angle of the bottom conical surface of the quadrangular prism 222 is smaller than the angle of its top conical surface, so that the smoke can contact the conical surface of the conical cover 209 to the greatest extent.

[0047] Among them, the separation component includes a filter-type conveyor belt 212, which is horizontally arranged on the top of the inner cavity of the water reservoir 203, and one end of the filter-type conveyor belt 212 extends to the outside of the water reservoir 203. The filter-type conveyor belt 212 is generally composed of a filter belt, a driving roller and a motor. The filter belt can be made of non-woven fabric or a flexible metal belt with filter holes. The liquid can be filtered when it falls on the filter-type conveyor belt 212, and the smoke and dust particles in the liquid are separated for subsequent separate treatment; the scraper blade 213 is slidably fitted on the end face of the filter-type conveyor belt 212 extending to the outside of the water reservoir 203, and the dust box 214 is detachably plugged into the side wall of the box-type housing 201, and the side wall of the dust box 214 extends to the box-type housing. The housing 201 is fixedly connected to the bottom of the scraper blade 213, so that the smoke and dust scraped off the surface of the scraper blade 213 falls into the dust box 214 for temporary storage. The operation of the filter-type conveyor belt 212 forms a relative movement with the scraper blade 213. When the filter-type conveyor belt 212 moves toward the scraper blade 213, the scraper blade 213 scrapes the surface of the filter-type conveyor belt 212, so that the smoke and dust particles attached to the filter-type conveyor belt 212 are transferred to the scraper blade 213 and slide into the dust box 214 for temporary storage as gravity increases. Since the dust box 214 is detachably connected to the outer wall of the box-type housing 201, it can be removed separately to clean the smoke and dust particles collected in the dust box 214.

[0048] In addition, the separation component also includes a water diversion cover 204, which is symmetrically arranged. The top of the water diversion cover 204 facing the water spraying part is horizontally convex and is provided with an L-shaped water inlet channel 207. The L-shaped water inlet channel 207 extends downward along the inside of the water diversion cover 204 to communicate with the top of the filter-type conveyor belt 212, and the bottom of one side of the water diversion cover 204 is provided with a water diversion bend 208 that bends toward the inside of the L-shaped water inlet channel 207; the liquid sprayed at the duckbill nozzle 206 needs to reach a preset pressure so that the tail end of the sprayed liquid can enter from the port of the L-shaped water inlet channel 207, so that it can flow downward along the inside of the L-shaped water inlet channel 207, and then use the diversion effect of the water diversion bend 208 to make the liquid slide along the inner wall of one side of the L-shaped water inlet channel 207 to the filter-type conveyor belt 212, so that the liquid can be effectively prevented from splashing, so that the smoke particles in the liquid can undergo a stable solid-liquid separation process on the filter-type conveyor belt 212.

[0049] Furthermore, a conical cover 209 is provided on the outer wall of the water reservoir 203, and a heat-conducting cavity 210 is provided between the conical cover 209 and the water reservoir 203. A plurality of connecting ribs 211 are provided at intervals in the heat-conducting cavity 210. The two ends of the plurality of connecting ribs 211 are fixedly connected to the water reservoir 203 and the opposite side of the conical cover 209 respectively. The water reservoir 203, the conical cover 209 and the connecting ribs 211 are all made of heat-conducting metal, and the water reservoir 203 is bent outward on both sides toward the water spraying part, and the top of the outward bending part of the water reservoir 203 is a slope surface. The conical cover 209 is provided on the outer wall of the water reservoir 203, which can protect the outer wall of the water reservoir 203. The connecting rib 211 is used to connect the water reservoir 203 and the conical mask 209. At the same time, the connecting rib 211 has elastic deformation performance, which can realize heat exchange between the water reservoir 203 and the conical mask 209, so that when the conical mask 209 is in contact with the flue gas in advance, it can not only use its inclined surface to separate the smoke dust in the flue gas, but also separate the water vapor contained in the flue gas; the two side walls of the water reservoir 203 are provided with long grooves 216, and the long grooves 216 are rotatably connected with long plates 217. One end of the long plate 217 extends to the interior of the water reservoir 203 and is fixedly connected to the inner wall of the water reservoir 203 with a spring member. The long plate 21 The other end extends into the heat-conducting cavity 210 and is fixedly connected to a knocking ball 218. A plurality of alloy pillars 215 are intermittently inserted into the filter belt of the filter-type conveyor belt 212. The two ends of the alloy pillars 215 are rounded and extend outward to a position where they can press against the side wall of the long plate 217. The alloy pillars 215 are fixedly inserted into the filter belt of the filter-type conveyor belt 212, and the ends of the alloy pillars 215 extend toward the inner wall of the water reservoir 203. When the filter-type conveyor belt 212 is in circulation, the ends of the alloy pillars 215 can be driven to contact and squeeze the side wall of the long plate 217, causing the long plate 217 to rotate and generate elastic potential energy. When the spring element is completely separated from the long strip 217, the elastic potential energy accumulated in the spring element is released through the long strip 217 to cause it to rotate, thereby driving the knocking ball 218 to hit the inner wall of the conical mask 209, causing the conical mask 209 to vibrate. The vibration force can be used to accelerate the collection and shedding of the liquid on the lower surface of the conical mask 209, thereby achieving the cleaning effect of the conical mask 209, so that the conical mask 209 can maintain the separation effect of smoke dust and water vapor in the smoke; the interior of the knocking ball 218 is a hollow structure, and a vibrating ball 219 is movably provided inside the knocking ball 218. An elastic connecting member 220 is fixedly connected between the outer wall of the vibrating ball 219 and the inner wall of the knocking ball 218;There are two possible placements for the vibrating ball 219. One is to place it near the middle of the inner wall of one side of the knocking ball 218 and connect it via a horizontally arranged elastic connector 220. When the knocking ball 218 strikes the conical cover 209, inertia causes the vibrating ball 219 to pull up the elastic connector 220 and strike the inner wall of the knocking ball 218. The reciprocating expansion and contraction of the elastic connector 220 then relieves potential energy, allowing the vibrating ball 219 to strike the knocking ball 218 multiple times, thereby increasing the vibration effect of the knocking ball 218 striking the conical cover 209. The other option is to place the vibrating ball 219 at the inner center of the knocking ball 218, with the elastic connector 220 arranged vertically. When the knocking ball 218 strikes, it causes the vibrating ball 219 to swing back and forth, striking the inner wall of the knocking ball 218 at multiple locations.

[0050] It should be noted that an overflow port is provided on the inner wall of the water reservoir 203 near the filter-type conveyor belt 212. The overflow port is located below the filter-type conveyor belt 212. A drainage pipe 224 is fixedly connected to the outer wall of the box-type shell 201. One end of the drainage pipe 224 extends into the box-type shell 201 and is fixedly connected to the overflow port on the outer wall of the water reservoir 203. The overflow port is located on the inner wall of the water reservoir 203 below the filter-type conveyor belt 212, so that the liquid level in the water reservoir 203 is not higher than the filter-type conveyor belt 212. 12, which can be beneficial to the solid-liquid separation. At the same time, the drainage pipe 224 can discharge excess liquid, and according to the principle that high-temperature liquid floats, the liquid in the water reservoir 203 is kept at a low temperature as much as possible, which is conducive to the separation of water vapor in the flue gas; the top of the box-type shell 201 is fixedly connected to an air outlet pipe 225, and an exhaust fan is installed in the air outlet pipe 225. The air outlet pipe 225 is convenient for connection to an external smoke exhaust pipe, and the setting of the exhaust fan can provide auxiliary power for the smoke to rise in the box-type shell 201.

[0051] This embodiment also provides a method for using a separation device for a boiler tail flue, comprising the following steps:

[0052] In step 1, the flue gas in the tail flue of the boiler enters the cyclone separation housing 101 through the air inlet pipe 102 and rotates. The smoke dust in the flue gas is thrown to the inner wall of the cyclone separation housing 101 by the centrifugal principle and adheres to it. Then, it falls due to gravity and falls from the bottom of the cyclone separation housing 101 into the dust outlet pipe 103. After rotating to the bottom of the cyclone separation housing 101, the smoke gas is transported upward to the box-type housing 201.

[0053] Step 2: After entering the box-type housing 201, the flue gas is transmitted vertically upward from the streamlined slot 221 of the deflector 202, collides with the outer wall of the conical mask 209, and continues to move upward along both sides thereof. When the flue gas contacts the surface of the conical mask 209, some small smoke particles adhere to the surface of the conical mask 209, and heat is exchanged with the conical mask 209, thereby separating water vapor from the flue gas.

[0054] Step 3: The liquid in the spray pipe 205 is sprayed toward the water guide cover 204 through multiple duckbill nozzles 206, thereby forming a parabolic water curtain between the spray pipe 205 and the water guide cover 204, so that the smoke can be washed when passing through the water curtain, which not only effectively separates small particles of smoke in the smoke, but also further separates water vapor in the smoke. The washed liquid is injected from the L-shaped water inlet channel 207 port and flows downward along the inner wall of the L-shaped water inlet channel 207. The water guide bend 208 is used to make the liquid flow along the L-shaped water inlet channel. The inner wall of the channel 207 slides down to the surface of the filter-type conveyor belt 212 to prevent the liquid from splashing due to excessive impact. At the same time, the filter-type conveyor belt 212 moves relative to the scraper blade 213, causing the smoke dust particles filtered in the wastewater to slide from the position of the scraper blade 213 to the dust collection box 214 for temporary storage. The washing wastewater filtered by the filter-type conveyor belt 212 is collected in the water reservoir 203 and heat is exchanged with the conical mask 209 through the connecting rib plate 211, so that the conical mask 209 can continue to separate water vapor from the flue gas.

[0055] Step four, since the alloy column 215 is inserted on the filter belt of the filter conveyor belt 212, the end of the alloy column 215 squeezes the side wall of the long plate 217 when the filter conveyor belt 212 runs, causing the long plate 217 to rotate and the knocking ball 218 to separate from the inner wall of the conical cover 209. When the alloy column 215 is completely separated from the long plate 217, the long plate 217 immediately rotates using the elastic thrust of the spring part, driving the knocking ball 218 to hit the inner wall of the conical cover 209, causing the conical cover 209 to vibrate, thereby shaking the liquid and smoke attached to the lower surface of the conical cover 209 to fall onto the guide cover 202 for collection.

[0056] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A separation device based on the tail flue of a boiler, characterized in that: include: a first separation mechanism (100); The second separation mechanism (200) comprises a box-type housing (201) fixed at the top position of the first separation mechanism (100), a water reservoir (203) fixed in the inner cavity of the box-type housing (201), a water spraying member arranged on the inner walls of both sides of the box-type housing (201) and spraying water into the water reservoir (203) to form a water curtain, and a separation component installed in the water reservoir (203) to collect smoke and dust in the wastewater, wherein the bottom end of the water reservoir (203) is in the shape of a cone with both sides inclined upward, and the air inlet arranged at the bottom of the box-type housing (201) is located in the middle position below the water reservoir (203) and is in the shape of a long strip; Wherein, the separation component includes: a filter-type conveyor belt (212), the filter-type conveyor belt (212) being horizontally arranged at the top of the inner cavity of the water reservoir (203), and one end of the filter-type conveyor belt (212) extending to the outside of the water reservoir (203); a scraper blade (213), the scraper blade (213) being slidably attached to an end surface of the filter-type conveyor belt (212) extending to the outside of the water reservoir (203); A dust collecting box (214), wherein the dust collecting box (214) is detachably plugged into the side wall of the box-type housing (201), and the side wall of the dust collecting box (214) extends into the box-type housing (201) and is fixedly connected to the bottom of the scraping blade (213), so that the smoke and dust scraped off the surface of the scraping blade (213) falls into the dust collecting box (214) for temporary storage; The separation assembly further comprises a water diversion cover (204), wherein the water diversion cover (204) is symmetrically arranged in two pieces, and the top of the water diversion cover (204) facing the water spraying member is horizontally convex and is provided with an L-shaped water inlet channel (207), the L-shaped water inlet channel (207) extending downward along the inside of the water diversion cover (204) to communicate with the top of the filter-type conveyor belt (212), and a water diversion bend (208) bent toward the inside of the L-shaped water inlet channel (207) is provided at the bottom of one side of the water diversion cover (204); The outer wall of the water reservoir (203) is provided with a conical cover (209), a heat-conducting cavity (210) is provided between the conical cover (209) and the water reservoir (203), a plurality of connecting ribs (211) are provided in the heat-conducting cavity (210), and two ends of the plurality of connecting ribs (211) are fixedly connected to the water reservoir (203) and the opposite side of the conical cover (209), respectively. The water reservoir (203), the conical cover (209) and the connecting ribs (211) are all made of heat-conducting metal material, and the water reservoir (203) is bent outwards on both sides toward the water spraying part, and the top of the outward bending portion of the water reservoir (203) is a sloped surface. The water spraying member comprises: Spray pipes (205), the spray pipes (205) are two and are respectively fixedly connected to the top of the inner walls on both sides of the box-type shell (201), and one end of the two spray pipes (205) is connected to the external pump body through a tee pipe; A plurality of duckbill nozzles (206), wherein the plurality of duckbill nozzles (206) are fixedly connected to the outer wall of the spray pipe (205) at horizontal intervals, and an arc-shaped water outlet is provided on a side of the duckbill nozzle (206) away from the spray pipe (205), so that liquid is sprayed from the duckbill nozzle (206) in a fan shape toward the port of the L-shaped water inlet channel (207); The bottom of the inner cavity of the box-type housing (201) is fixedly connected to a flow deflector (202), and a streamlined through groove (221) communicating with the upper and lower sides of the flow deflector (202) is provided in the middle of the flow deflector (202), and the width and diameter of the streamlined through groove (221) decrease from bottom to top, and the length of the streamlined through groove (221) is less than the length of the water reservoir (203), and the outer walls on both sides of the flow deflector (202) are sloped, and the outer walls on both sides of the flow deflector (202) are provided with A V-shaped slope (223) is provided horizontally at the middle position between the conical cover (209) and the deflector cover (202), and the two ends of the quadrangular prism (222) are fixed to the inner wall of the box-type shell (201). The width of the quadrangular prism (222) is greater than the width of the port of the streamlined through groove (221). The top and bottom ends of the quadrangular prism (222) are both V-shaped surfaces, and the bending angle of the top end of the quadrangular prism (222) is greater than the bending angle of the bottom end of the quadrangular prism (222).

2. The separation device based on the boiler tail flue according to claim 1 is characterized in that: Both side walls of the water reservoir (203) are provided with long through slots (216), and a long plate (217) is rotatably connected in the long through slots (216). One end of the long plate (217) extends into the interior of the water reservoir (203) and is fixedly connected to the inner wall of the water reservoir (203) with a spring member, and the other end of the long plate (217) extends into the heat-conducting cavity (210) and is fixedly connected to a knocking ball (218). A plurality of alloy columns (215) are inserted at intervals on the filter belt of the filter-type conveyor belt (212), and both ends of the alloy columns (215) are rounded and extend outward to a position where they can accumulate on the side walls of the long plate (217); The interior of the knocking ball (218) is a hollow structure. A vibration ball (219) is movably provided inside the knocking ball (218). An elastic connecting piece (220) is fixedly connected between the outer wall of the vibration ball (219) and the inner wall of the knocking ball (218).

3. The separation device based on the boiler tail flue according to claim 2, characterized in that: An overflow outlet is provided on the inner wall of the water reservoir (203) on one side close to the filter-type conveyor belt (212), and the overflow outlet is located below the filter-type conveyor belt (212). A drainage pipe (224) is fixedly connected to the outer wall of the box-type housing (201), and one end of the drainage pipe (224) extends into the box-type housing (201) and is fixedly connected to the overflow outlet on the outer wall of the water reservoir (203). An air outlet pipe (225) is fixedly connected to the top end of the box-type housing (201), and an exhaust fan is installed in the air outlet pipe (225).

4. The separation device based on the boiler tail flue according to claim 3 is characterized in that: The first separation mechanism (100) comprises: A cyclone separation housing (101), wherein the cyclone separation housing (101) is wide at the top and narrow at the bottom, the top of the cyclone separation housing (101) is fixedly connected to the box-type housing (201), and the bottom of the cyclone separation housing (101) is fixedly connected to a dust outlet pipe (103); An air inlet pipe (102) is fixedly connected to the top of the outer wall of the cyclone separation housing (101) in a horizontal shape, so that smoke enters from the air inlet pipe (102) and flows along the inner wall of the cyclone separation housing (101) to form a rotating motion.

5. The method for using the separation device based on the boiler tail flue according to claim 4, characterized in that: The following steps are involved: In step 1, the flue gas in the tail flue of the boiler enters the cyclone separation housing (101) through the air inlet pipe (102) and performs a rotating motion. The smoke dust in the flue gas is thrown toward the inner wall of the cyclone separation housing (101) by the centrifugal principle and adheres to it. The smoke dust falls due to gravity and falls from the bottom of the cyclone separation housing (101) into the dust outlet pipe (103). The smoke gas rotates to the bottom of the cyclone separation housing (101) and is then transported upward to the box-type housing (201). Step 2: After the smoke enters the box-type housing (201), it is transmitted vertically upward from the streamlined groove (221) of the guide cover (202), collides with the outer wall of the conical cover (209), and then continues to move upward along both sides thereof. When the smoke contacts the surface of the conical cover (209), some small particles of smoke adhere to the surface of the conical cover (209), and heat exchange is achieved with the conical cover (209), thereby separating water vapor from the smoke; Step 3: The liquid in the spray pipe (205) is sprayed toward the water guide cover (204) through a plurality of duckbill nozzles (206), thereby forming a parabolic water curtain between the spray pipe (205) and the water guide cover (204), so that the smoke can be washed when passing through the water curtain, which not only effectively separates the small particles of smoke in the smoke, but also further separates the water vapor in the smoke. The washed liquid is injected from the port of the L-shaped water inlet channel (207) and flows downward along the inner wall of the L-shaped water inlet channel (207). The water guide bend (208) is used to make the liquid flow along the L-shaped water inlet channel (207). 07) The inner wall slides down to the surface of the filter-type conveyor belt (212) to avoid splashing due to excessive impact of the liquid. At the same time, the filter-type conveyor belt (212) moves relative to the scraper blade (213), and the smoke dust particles filtered in the wastewater slide from the scraper blade (213) to the dust box (214) for temporary storage. The washing wastewater filtered by the filter-type conveyor belt (212) is collected in the water reservoir (203) and heat exchange is achieved with the cone mask (209) through the connecting rib plate (211), so that the cone mask (209) can continue to separate water vapor in the smoke. Step 4: Since the alloy column (215) is inserted into the filter belt of the filter conveyor belt (212), the end of the alloy column (215) squeezes the side wall of the long plate (217) when the filter conveyor belt (212) runs, causing the long plate (217) to rotate and the knocking ball (218) to separate from the inner wall of the conical cover (209). When the alloy column (215) and the long plate (217) are completely separated, the long plate (217) immediately rotates using the elastic thrust of the spring member, driving the knocking ball (218) to hit the inner wall of the conical cover (209), causing the conical cover (209) to vibrate, thereby shaking the liquid and smoke attached to the lower surface of the conical cover (209) to fall onto the guide cover (202) for collection.

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