Two-stage efficient wet dust collector
By designing a two-stage high-efficiency wet scrubber, and employing methods such as spray humidification and water bath dust removal, the problem of poor dust removal effect and high harmful gas emissions when wet scrubbers are used to treat flue gas containing water vapor has been solved, achieving the goals of ultra-low emissions and energy conservation and environmental protection.
Patent Information
- Application Number
- CN202422992253.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-05
AI Technical Summary
When existing wet scrubbers are used to process dusty flue gas containing a large amount of water vapor, the filter media is prone to caking and sticking, resulting in poor dust removal efficiency, high emissions of harmful gases, high water consumption, and difficulty in achieving ultra-low emissions.
The system employs a two-stage high-efficiency wet scrubber, comprising a spray dust removal chamber and a demisting chamber. It combines an atomizing spray device, a baffle plate demisting device, and a cyclone tube bundle demisting device. Through spray humidification, venturi tube mixing, and water bath dust removal, it achieves the separation of dust and harmful gases. Furthermore, the design of the circulating pump and water bath tube assembly reduces water consumption and harmful gas emissions.
It achieves ultra-low emission (concentration below 8mg/m3) separation of dust and harmful gases, reduces water consumption, improves dust removal efficiency, reduces harmful gas emissions, and meets the requirements of energy conservation and environmental protection.
Smart Images
Figure CN223555749U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wet dust removal equipment technical field, concretely relates to a two-stage high -efficient wet dust collector. BACKGROUND
[0002] There are various production processes of steel plant involving dust removal problem, and the dust characteristics are different due to different production processes, the dust in sintering, pellet feed process, steel slag in steelmaking process, salt-containing and iron oxide-containing dust in spin-expanding tube process can be removed by wet dust collector, and the filter material is easy to be caked and cannot be used when adopting bag dust collector and plastic burning plate dust collector, only wet dust collector can solve the dust removal problem, so a two-stage high -efficient wet dust collector is invented to protect the environment, improve the working conditions of workers and realize the requirement of ultra-low emission. SUMMARY
[0003] In view of the technical problems in the above background art, the utility model provides a two-stage high -efficient wet dust collector, which has reasonable and compact structure design, can remove the dust in the dust-containing gas and the mist droplets after wet dust removal, can remove harmful gas in flue gas, reduce the emission of harmful gas, reduce water consumption and realize the goal of energy saving and environmental protection.
[0004] To solve the above technical problems, the utility model provides a two-stage high -efficient wet dust collector, which comprises a rack, a spraying dust removal chamber and a demisting chamber matched with the rack, an atomizing spraying device matched with the inside of the spraying dust removal chamber, a flue gas inlet on one side of the spraying dust removal chamber and a dust-containing flue gas inlet pipeline matched with the flue gas inlet, an outlet on the demisting chamber, a baffle demisting device matched with the inside of the demisting chamber, a cyclone tube bundle demisting device matched with the inside of the demisting chamber,
[0005] One side of the rack is provided with a sedimentation tank, and the sedimentation tank is provided with a drain pipe from inside to outside,
[0006] The inner wall of the dust-containing flue gas inlet pipeline is matched with a spraying pipe group, and the bottom is matched with a flue gas inlet pipeline separator; the flue gas inlet pipeline separator is communicated with the drain pipe through a flue gas inlet separation pipe,
[0007] The bottom side of the spraying dust removal chamber and the bottom side of the demisting chamber are both matched with a circulating water cone bucket; the cone bottom outlet of each circulating water cone bucket is communicated with the drain pipe through a pipeline,
[0008] The lower inside of the spray dust removal chamber is matched with a flower plate; the flower plate completely separates the spray dust removal chamber from the mist removal chamber to ensure that the dust-containing flue gas and the clean flue gas are not mixed; the bottom of the flower plate is matched with uniformly arranged water bath pipe assemblies; and the water bath pipe assemblies vertically immerse below the water level of the circulating water cone hopper on the bottom side of the spray dust removal chamber; each water bath pipe assembly is composed of a straight pipe and a Venturi pipe matched with the lower end of the straight pipe.
[0009] The double-stage high-efficiency wet dust collector further comprises a circulating pump; the circulating pump is arranged on one side of the rack, and a water supply pipe and a circulating pipe are led out from the output end of the circulating pump; the water supply pipe extends from the output end of the circulating pump to the inside of the spray dust removal chamber; and the circulating pump is communicated with the inner cavities of the circulating water cone hoppers on the bottom sides of the spray dust removal chamber and the mist removal chamber through the circulating pipe.
[0010] The double-stage high-efficiency wet dust collector, wherein: the atomizing spray device is matched arranged on the water supply pipe in the inside of the spray dust removal chamber; and the atomizing spray device is provided with an atomizing spray head.
[0011] The double-stage high-efficiency wet dust collector, wherein: the rack is further matched with a water supplement tank on one side; and the water supplement tank is communicated with the circulating water cone hoppers on the bottom sides of the spray dust removal chamber and the mist removal chamber through pipes.
[0012] The double-stage high-efficiency wet dust collector, wherein: a deslagging valve is matched arranged on the pipe of the outlet of the cone bottom of each circulating water cone hopper.
[0013] The double-stage high-efficiency wet dust collector, wherein: a stirrer and a deslagging pump are matched arranged in the sedimentation tank; and the stirrer and the deslagging pump are separated in two different areas in the sedimentation tank.
[0014] The inside of the sedimentation tank is further matched with a water supplement device on the side of the stirrer.
[0015] A plate-and-frame filter press is matched arranged beside the pool opening of the sedimentation tank; the input end of the plate-and-frame filter press is matched connected with the output end of the deslagging pump through a clean water return pipe; and the output end of the plate-and-frame filter press is connected into the inside of the sedimentation tank through another clean water return pipe.
[0016] The above technical scheme has the following beneficial effects:
[0017] The double-stage high-efficiency wet dust collector has simple and reasonable structure, adopts a completely pure wet method, and realizes ultra-low emission of a dust-containing flue gas treatment system by using an ultra-low emission water bath dust removal process, so that the emission concentration is lower than 8 mg / m 3;Adopt two-stage separation dust removal mode, the first stage dust removal is to install spray pipe group in the dust removal system pipeline, the dust is backflowed to the sedimentation tank through the circulating water washing mode after being humidified by spraying, which reduces the dust removal load of the wet dust collector body; the second stage dust removal is the wet dust collector, which adopts the capture mode of Venturi water bath pipe high-speed washing dust and the combination mode of flue gas spraying, baffling and high-efficiency demisting, removes the water vapor dust in the flue gas and removes the mist carried after the wet dust removal, and can also dissolve certain harmful gases such as sulfur dioxide and nitrogen oxides, thereby reducing the emission of harmful gases; the spraying of atomized water is further reduced by the circulating mode of the circulating pump, which saves a large amount of water and reduces water consumption, and realizes the goal of energy saving and environmental protection.
[0018] Compared with the prior art, the utility model still has the following advantages or characteristics:
[0019] The prior art generally adopts a multi-tube water bath structure, but the multi-tube has a small diameter, generally φ63 steel pipe, which is easy to be blocked during operation. The utility model increases the straight pipe diameter of the water bath pipe assembly and adds a Venturi tube at the lower end of the straight pipe of the water bath pipe assembly, so that the kinetic energy of the atomized flue gas is increased under the action of the Venturi tube, the mixing effect of the flue gas and the water mist is improved, the weight gain, condensation and adsorption of the flue gas and the water mist after being fully mixed are improved, the dust removal effect is obviously improved, and most of the dust in the flue gas is separated out through the filtering program of the water bath, so that the dust removal effect is obvious and the multi-tube is not blocked. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.
[0021] Figure 1 It is a whole structure schematic diagram of the two-stage high-efficiency wet dust collector of the utility model;
[0022] Figure 2 It is a structure schematic diagram of the cyclone tube bundle demisting device of the two-stage high-efficiency wet dust collector of the utility model;
[0023] Figure 3 It is a structure schematic diagram of the baffle demisting device of the two-stage high-efficiency wet dust collector of the utility model;
[0024] Figure 4 It is a structure schematic diagram of a single water bath pipe assembly of the two-stage high-efficiency wet dust collector of the utility model. SPECIFIC EMBODIMENT
[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0026] The present invention will be further explained below with reference to specific embodiments.
[0027] like Figures 1-4 As shown, this embodiment provides a two-stage high-efficiency wet dust collector, including a frame 1, a spray dust removal chamber 2, an atomizing spray device 3, a demisting chamber 4, a baffle plate demisting device 5, a cyclone tube bundle demisting device 6, a water supply tank 7, a circulating water cone 8, a circulating pump 9, a stirrer 10, a water supply device 11, a plate and frame filter press 12, a slag discharge pump 13, a flue gas inlet separation pipe 14, and a drain pipe 15.
[0028] The frame 1 is placed on the ground, and a sedimentation tank 16 is dug on one side of the ground.
[0029] The sedimentation tank 16 is equipped with an agitator 10 and a slag discharge pump 13; the agitator 10 and the slag discharge pump 13 are separated into two different areas within the sedimentation tank 16. A water supply device 11 is also installed inside the sedimentation tank 16 on one side of the agitator 10, and this water supply device 11 is connected to a tap water supply pipe. Simultaneously, a drain pipe 15 is installed on the side of the sedimentation tank 16 near the frame 1; one end of the drain pipe 15 extends into the sedimentation tank 16, and the other end extends outwards to the bottom of the frame 1. A plate and frame filter press 12 is installed on the ground beside the sedimentation tank 16; the input end of the plate and frame filter press 12 is connected to the output end of the slag discharge pump 13 via a clean water return pipe 17, and the output end of the plate and frame filter press 12 is connected to the sedimentation tank 16 via another clean water return pipe 17.
[0030] The spray dust removal chamber 2 is matched and installed on the upper part of the rack 1, the upper left side of which is matched with a flue gas inlet 21, and the flue gas inlet 21 is matched with a dust-containing flue gas inlet pipeline 22. The inner wall near the inlet of the dust-containing flue gas inlet pipeline 22 is matched with a spray pipe group 23, and the bottom is matched with a flue gas inlet pipeline separator 24. The flue gas inlet pipeline separator 24 is communicated with the drain pipe 15 located at the bottom side of the rack 1 through the flue gas inlet separation pipe 14. At the same time, the inside of the spray dust removal chamber 2 is matched with a flower plate 26, and the bottom of the flower plate 26 is matched with a plurality of vertical and side-by-side arranged water bath pipe assemblies 25. The flower plate 26 completely separates the spray dust removal chamber 2 and the mist removal chamber 4, ensures that the dust-containing flue gas and the clean flue gas are not mixed, and ensures the dust removal effect. The bottom of the spray dust removal chamber 2 is matched with a circulating water cone bucket 8 below the water bath pipe assembly 25. The water bath pipe assembly 25 is vertically submerged below the water level of the circulating water cone bucket 8 located at the bottom side of the spray dust removal chamber 2. Each water bath pipe assembly 25 is composed of a straight pipe 251 and a venturi tube 252 matched and connected to the lower end of the straight pipe 251. The diameter of the straight pipe 251 is φ159, and the diameter of the venturi tube 252 is φ108.
[0031] The circulating pump 9 is arranged on the ground at one side of the bottom end of the rack 1, and the output end thereof leads out two pipelines, one of which is a water supply pipe 91, and the other of which is a circulating pipe 92. One end of the water supply pipe 91 is matched and connected to the output end of the circulating pump 9, and the other end extends to the inside of the upper side of the spray dust removal chamber 2.
[0032] The atomizing spray device 3 is matched and arranged on the water supply pipe 91 located at the inside of the upper side of the spray dust removal chamber 2. The atomizing spray device 3 is uniformly provided with a plurality of atomizing nozzles, and the atomizing nozzles adopt vortex nozzles or spiral nozzles.
[0033] The mist removal chamber 4 is matched and installed on the upper part of the rack 1 and located beside the spray dust removal chamber 2, the top of which is matched with a smoke outlet 41, and the bottom side is matched with another circulating water cone bucket 8.
[0034] The cone bottom outlet of each circulating water cone bucket 8 located at the bottom side of the spray dust removal chamber 2 and the mist removal chamber 4 is communicated with the drain pipe 15 through a pipeline, and a deslagging valve 81 is matched and arranged on the pipeline of the cone bottom outlet of each circulating water cone bucket 8. The rack 1 is further matched with a water supplement tank 7 at a position located at one side of the mist removal chamber 4. The water supplement tank 7 is fixedly installed on the rack 1 and is communicated with the circulating water cone buckets 8 located at the bottom sides of the spray dust removal chamber 2 and the mist removal chamber 4 through pipelines. The circulating pump 9 is communicated with the inner cavities of the circulating water cone buckets 8 located at the bottoms of the spray dust removal chamber 2 and the mist removal chamber 4 through the circulating pipe 92.
[0035] The baffle demister 5 is arranged on the inner lower side of the demister chamber 4 and is provided with a plurality of evenly arranged demister blades 51 in a herringbone shape. The baffle demister 5 changes the direction of flue gas by the principle of baffle turning, reduces the kinetic energy of flue gas, and realizes the principle of gas-water separation. The baffle demister 5 is mainly used for gas-water separation of large particles and is used as a primary dust and mist removal device. When flue gas containing liquid droplets enters the narrow and tortuous channel formed by the demister blades 51, the flow line is deflected to generate centrifugal force, and the liquid droplets are separated. Part of the liquid droplets are captured by the demister blades 51, and part of the liquid droplets adhere to the wall of the plate to form a water layer, which slowly flows downward and collects into larger droplets, thereby realizing gas-water separation.
[0036] The cyclone tube bundle demister 6 is arranged on the inner upper side of the demister chamber 4 and is used to remove water mist and liquid droplets in saturated clean flue gas containing a large amount of small liquid droplets. The use environment features a large amount of mist droplets and a wide range of mist droplet particle size distribution, including slurry droplets, condensation droplets and dust particles. Through the processes of condensation, capture and adsorption of small droplets and particles, the cyclone tube bundle demister 6 can effectively remove small droplets and dust particles in flue gas.
[0037] The cyclone tube bundle demister 6 removes water mist and liquid droplets in gas through its unique structure. The cyclone tube bundle demister 6 includes a plurality of vertically arranged tube bundle cylinders 61 and a support 60 vertically installed inside the tube bundle cylinder 61. Each tube bundle cylinder 61 is connected with a speed-up tube 62, and each tube bundle cylinder 61 is internally matched with a separator 63, a current collector ring 64 and a flow guide ring 65 through the support 60. Meanwhile, a backwashing pipe 18 is also arranged in the demister chamber 4 above the cyclone tube bundle demister 6, and the backwashing pipe 18 provides clean water through an external clean water pump. The cyclone tube bundle demister 6 is cleaned through the backwashing pipe 18 after a long time of operation. The tube bundle cylinder 61 is vertically arranged as a whole, has a smooth inner wall surface, a smooth cross section and no eccentricity. The speed-up tube 62 ensures the rotational motion speed of the airflow with small resistance. The separator 63 realizes the separation of mist droplets of different particle sizes in flue gas. The current collector ring 64 controls the liquid film thickness and maintains a suitable airflow distribution state. The flow guide ring 65 controls the airflow outlet state and prevents the captured liquid droplets from being secondarily entrained. When the water-containing gas flows through the cyclone tube bundle demister 6, the water mist and liquid droplets in the gas will condense into water droplets on the inner wall surface of the tube bundle cylinder 61 and flow along the inner wall surface of the tube bundle cylinder 61, and finally be collected and removed. The main structure of the cyclone tube bundle demister 6 is usually composed of a plurality of tube bundle cylinders 61, and each tube bundle cylinder 61 has a large number of small holes and fine seams inside. The existence of these pores and fine seams can increase the contact area between the gas and the surface of the tube bundle cylinder 61, thereby promoting the condensation and deposition of water mist and liquid droplets.
[0038] The working process or principle of the two-stage high-efficiency wet dust collector is as follows:
[0039] The two-stage separation dust removal mode is adopted, the first-stage dust removal is that the spray pipe group 23 is installed in the dust-containing flue gas inlet pipeline 22, dust is condensed, mixed and adsorbed after being sprayed and humidified, 80% of the dust is separated, and is returned to the sedimentation tank through the continuous washing of circulating water, so that most of the dust in the dust-containing flue gas inlet pipeline 22 is separated and does not enter the spray dust removal chamber 2, thereby reducing the dust removal load of the spray dust removal chamber 2.
[0040] After the dust removal process of the above three processes, the dust in the flue gas is separated, but a large amount of water mist in the flue gas needs to be removed, otherwise the load of the smoke outlet 41 will be increased and the smoke outlet 41 will be corroded, and a large amount of white smoke will be produced when the water mist in the flue gas is discharged into the atmosphere through the smoke outlet 41, which will affect the environment.
[0041] The utility model discloses compact structure design is reasonable, can remove the dust in dust-containing gas and remove the mist drop that wet dust removal has had, can remove sulfur dioxide, nitrogen oxides and other harmful gases contained in flue gas simultaneously, reduces the emission of harmful gas, realizes water recycling through the circulating atomization mode, reduces water consumption, realizes the goal of energy saving and environmental protection, is suitable for promotion and application.
[0042] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A double-stage high-efficiency wet dust collector, comprising a frame (1), a spray dust removal chamber (2) and a demisting chamber (4) which are matched and arranged on the frame (1); an atomizing spray device (3) is matched and arranged inside the spray dust removal chamber (2); a flue gas inlet (21) is further arranged on one side of the spray dust removal chamber (2), and a dust-containing flue gas inlet pipeline (22) is matched and installed at the flue gas inlet (21); a flue gas outlet (41) is matched and arranged on the demisting chamber (4); characterized in that: The inside lower side of the demisting chamber (4) is matched with a baffle demisting device (5), and the inside upper side is matched with a cyclone tube bundle demisting device (6); One side of the rack (1) is provided with a sedimentation tank (16); the sedimentation tank (16) is provided with a drain pipe (15) from inside to outside; The inner wall of the dust-containing flue gas inlet pipeline (22) is matched with a spray pipe group (23), and the bottom is matched with a flue gas inlet pipeline separator (24); the flue gas inlet pipeline separator (24) is communicated with the drain pipe (15) through a flue gas inlet separation pipe (14); The bottom side of the spray dust removal chamber (2) and the bottom side of the demisting chamber (4) are both matched with a circulating water cone bucket (8); the cone bottom outlet of each circulating water cone bucket (8) is communicated with the drain pipe (15) through a pipeline; The inside lower side of the spray dust removal chamber (2) is matched with a flower plate (26); the flower plate (26) completely separates the spray dust removal chamber (2) from the demisting chamber (4) to ensure that the dust-containing flue gas and the clean flue gas are not mixed; the bottom of the flower plate (26) is matched with a water bath pipe assembly (25) arranged uniformly; and the water bath pipe assembly (25) is vertically submerged below the water level of the circulating water cone bucket (8) located at the bottom side of the spray dust removal chamber (2); each water bath pipe assembly (25) is composed of a straight pipe (251) and a Venturi tube (252) matched connected to the lower end of the straight pipe (251).
2. The two-stage high-efficiency wet dust scrubber of claim 1, wherein: The double-stage high-efficiency wet dust collector further comprises a circulating pump (9); the circulating pump (9) is arranged on one side of the rack (1), and an output end of the circulating pump (9) is provided with a water supply pipe (91) and a circulating pipe (92); the water supply pipe (91) extends from the output end of the circulating pump (9) to the inside of the spray dust removal chamber (2); the circulating pump (9) is communicated with the inner cavities of the circulating water cone buckets (8) located at the bottom sides of the spray dust removal chamber (2) and the demisting chamber (4) through the circulating pipe (92).
3. The two-stage high-efficiency wet dust scrubber of claim 2, wherein: The atomizing spray device (3) is matched arranged on the water supply pipe (91) located in the inside of the spray dust removal chamber (2); the atomizing spray device (3) is provided with an atomizing spray head.
4. The two-stage high-efficiency wet dust scrubber of claim 2, wherein: One side of the rack (1) is further matched with a water supplement tank (7); the water supplement tank (7) is communicated with the circulating water cone buckets (8) located at the bottom sides of the spray dust removal chamber (2) and the demisting chamber (4) through pipelines.
5. The two-stage high-efficiency wet dust scrubber of claim 2, wherein: A deslagging valve (81) is matched arranged on the pipeline of the cone bottom outlet of each circulating water cone bucket (8).
6. The two-stage high-efficiency wet dust scrubber of claim 1, wherein: A stirrer (10) and a deslagging pump (13) are matched arranged in the sedimentation tank (16); and the stirrer (10) and the deslagging pump (13) are separated in two different areas in the sedimentation tank (16); An inside of the sedimentation tank (16) is further matched with a water supplement device (11) on one side of the stirrer (10); A plate-and-frame filter press (12) is arranged in matching relation beside the pool opening of the sedimentation tank (16); the input end of the plate-and-frame filter press (12) is connected in matching relation with the output end of the residue discharge pump (13) through a clean water return pipe (17), and the output end of the plate-and-frame filter press (12) is connected into the inside of the sedimentation tank (16) through another clean water return pipe (17).