Air screen device
By staggering the exhaust vents, baffles, and fluidized bed structure, and combining them with a vibrating mechanism and a make-up air valve, the problems of baffle blockage and negative pressure in the air screen device are solved, achieving efficient dust removal and stable system operation.
Patent Information
- Application Number
- CN202420018657.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-04
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-01-04
AI Technical Summary
Existing air-screen devices are prone to clogging of the screen holes, resulting in low dust removal rates. Negative pressure in the air box affects the stable operation of subsequent equipment, making it difficult to meet ultra-low emission requirements.
The system employs a staggered arrangement of exhaust vents, baffles, and fluidized bed structure, combined with a rapping mechanism and a make-up air valve, to improve the problem of baffle blockage and to counteract the negative pressure effect through the make-up air duct, ensuring stable system operation.
It improves air separation efficiency and dust removal rate, reduces the risk of screen blockage, ensures the normal operation of subsequent equipment, and meets ultra-low emission requirements.
Smart Images
Figure CN222325805U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to activated carbon processing and production equipment, in particular to a wind screen device used for removing powder and dust from activated carbon, belonging to the technical field of activated carbon processing and production. Background Art
[0002] A large amount of flue gas containing multiple pollutants will be generated during the iron and steel metallurgical process. These flue gases need to be purified before they can be discharged. The existing technology generally uses an activated carbon desulfurization and denitrification system to remove harmful substances in the flue gas. The pollutants in the flue gas are removed by the adsorption of activated carbon. At the same time, the activated carbon adsorbed with pollutants is thermally regenerated by high-temperature analysis. The regenerated activated carbon can be recycled for the purification of the original flue gas. In the process of activated carbon adsorption, analysis and transportation and transfer, it is easy to wear and damage, resulting in slag and dust. These fine particles of carbon powder not only affect the purification effect of activated carbon on flue gas, but also easily lead to safety accidents. Therefore, it is often necessary to separate these fine particles of carbon powder. At present, vibration screening is generally used to grade and screen activated carbon, but the ultrafine dust adsorbed in the micropores of activated carbon particles cannot be removed by vibration screening. After the activated carbon returns to the flue gas purification system, the ultrafine dust is released, making the dust concentration of the purified flue gas high and failing to meet the ultra-low emission requirements.
[0003] In the prior art, the use of an air screening device can effectively remove ultrafine dust adsorbed in activated carbon particles. However, the existing air screening device is generally a simple air selection method through vertical suction, which has a poor air selection effect and is easy to clog the sieve holes. The dust removal rate is low and the operator needs to frequently clean the screen surface, which increases the operator's workload and affects the screening effect and output. At the same time, since the air screening box is connected in series with subsequent equipment, the negative pressure in the air screening box will act on the subsequent equipment, affecting the normal operation of the subsequent equipment, and thus causing unstable system operation. Utility Model Content
[0004] In view of the problems in the prior art that the screen holes of the existing wind screening device are easily clogged, resulting in a low dust removal rate, and the negative pressure of the bellows extends backward and affects the stable operation of the system, the utility model provides a wind screening device, which changes the direction of the airflow through staggered exhaust ports, screens and fluidized beds, improves the clogging of the screens, and at the same time, relieves and offsets the negative pressure in the wind screen box by arranging an air supply valve downstream of the wind screen box, thereby avoiding the backward continuation of the negative pressure in the wind screen box, effectively ensuring the normal operation of subsequent equipment, and thus maintaining the stability of the system operation.
[0005] In order to achieve the above technical objectives, the technical solutions adopted by the present utility model are as follows:
[0006] A wind screen device, comprising a wind screen box, a fluidized bed and a baffle. A feed pipe is provided at the top of one side of the wind screen box, and a discharge pipe is provided at the bottom of the other side of the wind screen box. The fluidized bed is tilted inside the wind screen box, and the inside of the wind screen box is divided into an air inlet chamber and an air outlet chamber. The higher end of the fluidized bed is located below the outlet of the feed pipe, and the lower end of the fluidized bed is located above the inlet of the discharge pipe. The air inlet chamber is located at the lower side of the fluidized bed, and the air outlet chamber is located at the upper side of the fluidized bed. An air inlet duct is provided on the bottom wall of the air inlet chamber opposite to the fluidized bed. An exhaust duct is provided on the side wall of the air outlet chamber opposite to the fluidized bed. The baffle is vertically arranged between the exhaust duct and the air outlet chamber. An air supply duct connected to the discharge duct is provided on the discharge duct.
[0007] Preferably, the fluidized bed is composed of a plurality of fluidizing plates connected in series, and at least one fluidizing vertical baffle is provided on the surface of each fluidizing plate.
[0008] Preferably, the inclination angle of the fluidized bed is 30-70°, preferably 40-60°.
[0009] Preferably, a first reflector is horizontally arranged on the inner wall of the feed pipe. A material distribution platform extending horizontally away from the fluidized bed is connected to the top of the fluidized bed. The first reflector is located above the opposite side of the material distribution platform. Preferably, a vertical overflow plate is also arranged at the outer end of the first reflector.
[0010] Preferably, the device further comprises a vibrating mechanism, which is arranged in the exhaust duct and located on a side of the retaining screen away from the air outlet chamber, and the retaining screen is periodically vibrated by the vibrating mechanism.
[0011] Preferably, the rapping mechanism includes a fixed seat, a rapping arm, a rapping hammer and a rapping drive. The fixed seat is fixed on the pipe wall of the exhaust duct, the rapping hammer is connected to the fixed seat through the rapping arm, the rapping drive is arranged on one side of the fixed seat, and drives the rapping arm to drive the rapping hammer to rap the screen.
[0012] Preferably, the device further comprises a buffer bin. The buffer bin is arranged below the wind screen box, and the top feed port of the buffer bin is connected to the discharge pipe. A discharge port is arranged at the bottom of the buffer bin. Preferably, the air supply pipe is arranged on the buffer bin and is located at the upper part of the side wall of the buffer bin away from the discharge pipe.
[0013] Preferably, a gate valve is horizontally arranged at the discharge port. The gate valve comprises a hand wheel, a valve stem, a sealing seat, a support mechanism, a hinge seat and a valve plate which are arranged in series in sequence. The hand wheel, the valve stem, the sealing seat and the support mechanism are located outside the discharge port, the hinge seat and the valve plate are located inside the discharge port, and the valve stem is controlled by the hand wheel to drive the valve plate to open and close the discharge port.
[0014] Preferably, according to the direction of the material, a bypass discharge pipe is provided on one side of the buffer bin away from the material source at the discharge port. A material dividing baffle is vertically provided on the bottom wall of the buffer bin between the discharge port and the bypass discharge pipe.
[0015] Preferably, the height of the material distribution baffle is not higher than two-thirds of the total height of the buffer bin, and is preferably one-fifth to one-half of the total height of the buffer bin.
[0016] Preferably, a second reflector is provided on the side wall of the buffer bin below the feed port at the top of the buffer bin, and a vertical overflow plate is provided at the outer end of the second reflector.
[0017] Preferably, a discharge observation port is provided at the top of the buffer bin and / or at the top of the bypass discharge pipe.
[0018] Preferably, the discharge pipe is an inclined discharge chute, and a plurality of vertical baffles perpendicular to the bottom of the discharge chute are arranged on the inner bottom wall of the discharge chute. An iron remover is arranged on the top wall of the discharge chute.
[0019] Preferably, an air screen observation port and an air screen material level detector are also provided on the top of the air screen box.
[0020] Preferably, an inspection door is provided on the pipe wall of the exhaust duct away from the baffle screen.
[0021] In the utility model, the wind screen device includes a wind screen box, a fluidized bed obliquely arranged in the wind screen box, and a baffle screen vertically arranged at the air outlet; the fluidized bed is composed of a plurality of fluidized plates connected in series in sequence, and the fluidized plates are provided with air outlet sieve holes for the air flow to blow out, and the air inlet chamber guides the air sent from the air inlet to the air outlet sieve holes. When the wind screen device is working, the activated carbon is first fluidized to form a suspended fluidized bed. Under the action of the air flow velocity, the activated carbon keeps rolling, and at the same time, it strongly contacts and rubs with the air flow, thereby separating the fine particles attached to the activated carbon from the surface and pores of the activated carbon. According to the principle of air separation, after the ultrafine particles are separated from the activated carbon, due to the difference in density and particle size, the ultrafine particles are taken out of the large activated carbon particles under the action of the air flow, thereby achieving the purpose of separation. Under the action of the baffle screen, the fine particles of activated carbon powder are extracted, while the coarse particles of activated carbon are blocked from falling and discharged through the discharge pipe.
[0022] In the utility model, the retaining screen and the fluidized bed are arranged in an interlaced manner relative to each other, so as to prevent the airflow passing through the fluidizing plate from carrying activated carbon particles and directly hitting the retaining screen plate, which can effectively reduce the blockage of the screen holes of the retaining screen by the activated carbon particles. In addition, a vibrating mechanism is provided for beating the screen from one side of the retaining screen to make the retaining screen vibrate and thus prevent the activated carbon particles and / or dust from accumulating on the retaining screen; the vibrating mechanism includes a fixed seat, a vibrating arm, a vibrating hammer and a vibrating drive, the fixed seat is used as an installation basis for the swing of the vibrating arm, and the vibrating drive drives the vibrating arm to rotate and swing around the connection point between the vibrating arm and the fixed seat, and after the vibrating arm rotates to a certain height, it falls to vibrate the screen by relying on its own gravity and the gravity of the vibrating hammer.
[0023] In the utility model, a first reflective plate is horizontally arranged on the inner wall of the feed pipe, and a distribution platform is connected to the top of the fluidized bed and extends horizontally to the side away from the fluidized bed. During normal feeding, the activated carbon is introduced from the inlet of the feed pipe, and is discharged from the discharge pipe after passing through the first reflective plate, the distribution platform, and the fluidizing plate in sequence under the action of gravity. The staggered arrangement of the first reflective plate and the distribution platform can, on the one hand, buffer the descending material and reduce material wear, and on the other hand, can also turn the material over, which is beneficial to the exposure and removal of fine powder.
[0024] In the utility model, a buffer bin is also provided below the air screen box, through which temporary storage and dispersed unloading of large-particle activated carbon materials can be realized. A gate valve is provided at the bottom discharge port of the buffer bin to control the discharge of materials. In addition, a bypass unloading pipeline is provided on one side of the discharge port of the buffer bin. During bypass unloading, the material passes through the second reflector and is blocked by the closed gate valve and the material distribution baffle. It accumulates in the buffer cavity until it overflows, and then is discharged from the bypass unloading pipeline. The bypass unloading can prevent the blockage problem during normal unloading, so that the air screen can continue to operate normally. On the other hand, the air screen device also has a bypass function under normal conditions, providing bypass material for the system.
[0025] In the utility model, an iron remover is also provided on the top wall of the discharge pipe, and the iron remover is used to remove ferromagnetic impurities in the activated carbon layer, so as to protect the activated carbon analysis equipment and improve the analysis efficiency. The principle of the iron remover is to use the adsorption effect of strong magnets on ferromagnetic impurities. When the activated carbon flows downward along the discharge chute under the action of gravity, the strong magnet above it will adsorb the ferromagnetic impurities entrained in the activated carbon, and the strong magnet will be turned out along the rotating shaft to clean the impurities during maintenance. In addition, by setting a certain height of the discharge vertical baffle at the bottom of the discharge chute, the material lining function is realized, which can effectively prevent the material from wearing the equipment. The material of part of the discharge chute is non-magnetic material, such as stainless steel, which can prevent the chute from being magnetized by the strong magnet and adsorbing ferromagnetic impurities, thereby failing to achieve the predetermined adsorption effect.
[0026] In the utility model, the air supply duct can be directly arranged on the discharge duct or on the buffer bin. The fluid enters the air inlet chamber from the air inlet, and under the action of the air pressure of the exhaust fan, it is pressed out from the micropores of the fluidizing plate to impact the activated carbon layer on the fluidizing plate, so that it is fluidized and suspended to form a fluidized bed, so that the ultrafine particles in the activated carbon are precipitated, and after passing through the vibration screen, they are led out from the exhaust duct and enter the dust removal device. A ventilation butterfly valve is arranged on the air supply duct, and its function is to prevent the wind pressure in the exhaust duct from being too high, causing the negative pressure to spread to the equipment below the wind screen discharge duct, thereby affecting the normal operation of other equipment.
[0027] Compared with the prior art, the beneficial technical effects of the utility model are as follows:
[0028] 1: The utility model reduces the probability of the baffle screen being blocked and improves the air selection efficiency and effect by staggered arrangement of fluidizing plates and baffle screens. In addition, by arranging a make-up air duct downstream of the air screen box, the negative pressure from the exhaust duct is effectively offset, the downward extension of the negative pressure is avoided, and the normal operation of subsequent equipment is guaranteed.
[0029] 2: The utility model greatly improves the removal efficiency of ferromagnetic impurities in the material and ensures the safe operation of the system by simultaneously arranging an iron remover and a discharge vertical baffle in the discharge chute.
[0030] 3: The utility model improves the discharge smoothness and stability of the wind screen device through the design of the plug valve, the material distribution baffle and the bypass discharge pipeline.
[0031] 4: The wind screen device of the utility model has a simple overall structure, small site occupancy, convenient operation and low preparation cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a front cross-sectional structural schematic diagram of the wind screen device of the utility model.
[0033] Figure 2 It is a side view of the wind screen device of the utility model.
[0034] Figure 3 It is a structural schematic diagram of the plug valve of the utility model.
[0035] Figure 4 It is a schematic diagram of the wind screen device of the utility model discharging materials through the discharge port.
[0036] Figure 5 It is a schematic diagram of the utility model of the wind screen device discharging materials through the bypass discharge pipe.
[0037] Figure numerals: 1: wind screen box; 101: feed pipe; 102: discharge pipe; 103: air inlet pipe; 104: exhaust pipe; 105: air inlet chamber; 106: air outlet chamber; 107: first reflector; 108: discharge vertical baffle; 109: iron remover; 110: inspection door; 111: wind screen observation port; 112: wind screen material level detector; 2: fluidized bed; 201: fluidized vertical baffle; 202: material distribution platform; 3: baffle; 4: air supply pipe; 5: vibration mechanism; 6: buffer bin; 601: discharge port; 602: bypass discharge pipe; 603: material distribution baffle; 604: second reflector; 7: gate valve; 701: hand wheel; 702: valve stem; 703: sealing seat; 704: supporting mechanism; 705: hinged seat; 706: valve plate. DETAILED DESCRIPTION
[0038] The technical solution of the utility model is illustrated below, and the scope of protection requested for the utility model includes but is not limited to the following embodiments.
[0039] A wind screen device, comprising a wind screen box 1, a fluidized bed 2 and a screen 3. A feed pipe 101 is provided at the top of one side of the wind screen box 1, and a discharge pipe 102 is provided at the bottom of the other side of the wind screen box 1. The fluidized bed 2 is arranged obliquely inside the wind screen box 1, and the inside of the wind screen box 1 is divided into an air inlet chamber 105 and an air outlet chamber 106. The higher end of the fluidized bed 2 is located below the outlet of the feed pipe 101, and the lower end of the fluidized bed 2 is located above the inlet of the discharge pipe 102. The air inlet chamber 105 is located at the lower side of the fluidized bed 2, and the air outlet chamber 106 is located at the upper side of the fluidized bed 2. An air inlet pipe 103 is provided on the bottom wall of the air inlet chamber 105 opposite to the fluidized bed 2. An exhaust pipe 104 is provided on the side wall of the air outlet chamber 106 opposite to the fluidized bed 2. The screen 3 is arranged vertically between the exhaust pipe 104 and the air outlet chamber 106. An air supply duct 4 connected to the discharge duct 102 is provided on the discharge duct 102 .
[0040] Preferably, the fluidized bed 2 is composed of a plurality of fluidized plates connected in series, and at least one fluidized vertical baffle 201 is provided on the surface of each fluidized plate.
[0041] Preferably, the inclination angle of the fluidized bed 2 is 30-70°, preferably 40-60°.
[0042] Preferably, a first reflector 107 is horizontally arranged on the inner wall of the feed pipe 101. A material distribution platform 202 extending horizontally toward a side away from the fluidized bed 2 is connected to the top of the fluidized bed 2. The first reflector 107 is located above the opposite side of the material distribution platform 202. Preferably, a vertical overflow plate is also arranged at the outer end of the first reflector 107.
[0043] Preferably, the device further comprises a rapping mechanism 5 , which is arranged in the exhaust duct 104 and located on a side of the retaining screen 3 away from the air outlet chamber 106 , and the retaining screen 3 is periodically rapped by the rapping mechanism 5 .
[0044] Preferably, the rapping mechanism 5 includes a fixed seat, a rapping arm, a rapping hammer and a rapping drive. The fixed seat is fixed on the pipe wall of the exhaust duct 104. The rapping hammer is connected to the fixed seat through the rapping arm. The rapping drive is arranged on one side of the fixed seat, and drives the rapping arm to drive the rapping hammer to rap the screen 3.
[0045] Preferably, the device further comprises a buffer bin 6. The buffer bin 6 is arranged below the wind screen box 1, and the top feed port of the buffer bin 6 is connected to the discharge pipe 102. A discharge port 601 is arranged at the bottom of the buffer bin 6. Preferably, the air supply pipe 4 is arranged on the buffer bin 6 and is located at the upper part of the side wall of the buffer bin 6 away from the discharge pipe 102.
[0046] Preferably, a gate valve 7 is horizontally arranged at the discharge port 601. The gate valve 7 comprises a hand wheel 701, a valve stem 702, a sealing seat 703, a support mechanism 704, a hinge seat 705 and a valve plate 706 which are sequentially arranged in series. The hand wheel 701, the valve stem 702, the sealing seat 703 and the support mechanism 704 are located outside the discharge port 601, the hinge seat 705 and the valve plate 706 are located inside the discharge port 601, and the valve stem 702 is controlled by the hand wheel 701 to drive the valve plate 706 to open and close the discharge port 601.
[0047] Preferably, according to the direction of the material, a bypass discharge pipe 602 is further provided on the side of the buffer bin 6 away from the material source at the discharge port 601. A material dividing baffle 603 is vertically provided on the bottom wall of the buffer bin 6 between the discharge port 601 and the bypass discharge pipe 602.
[0048] Preferably, the height of the material dividing baffle 603 is not higher than two-thirds of the total height of the buffer bin 6 , and is preferably one-fifth to one-half of the total height of the buffer bin 6 .
[0049] Preferably, a second reflector plate 604 is further provided on the side wall of the buffer bin 6 below the feed port at the top of the buffer bin 6. A vertical overflow plate is further provided at the outer end of the second reflector plate 604.
[0050] Preferably, a discharge observation port is provided at the top of the buffer bin 6 and / or at the top of the bypass discharge pipe 602 .
[0051] Preferably, the discharge pipe 102 is an inclined discharge chute, and a plurality of vertical baffles 108 are arranged on the inner bottom wall of the discharge chute and are perpendicular to the bottom thereof. An iron remover 109 is arranged on the top wall of the discharge chute.
[0052] Preferably, a wind screen observation port 111 and a wind screen material level detector 112 are also provided on the top of the wind screen box 1 .
[0053] Preferably, an inspection door 110 is provided on the pipe wall of the exhaust duct 104 on the side away from the retaining screen 3 .
[0054] Example 1
[0055] like Figure 1-5 As shown, a wind screen device includes a wind screen box 1, a fluidized bed 2 and a screen 3. A feed pipe 101 is provided at the top of one side of the wind screen box 1, and a discharge pipe 102 is provided at the bottom of the other side of the wind screen box 1. The fluidized bed 2 is arranged obliquely inside the wind screen box 1, and the inside of the wind screen box 1 is divided into an air inlet chamber 105 and an air outlet chamber 106. The higher end of the fluidized bed 2 is located below the outlet of the feed pipe 101, and the lower end of the fluidized bed 2 is located above the inlet of the discharge pipe 102. The air inlet chamber 105 is located at the lower side of the fluidized bed 2, and the air outlet chamber 106 is located at the upper side of the fluidized bed 2. An air inlet pipe 103 is provided on the bottom wall of the air inlet chamber 105 opposite to the fluidized bed 2. An exhaust pipe 104 is provided on the side wall of the air outlet chamber 106 opposite to the fluidized bed 2. The screen 3 is vertically arranged between the exhaust pipe 104 and the air outlet chamber 106. An air supply duct 4 connected to the discharge duct 102 is provided on the discharge duct 102 .
[0056] Example 2
[0057] The embodiment 1 is repeated, except that the fluidized bed 2 is composed of a plurality of fluidized plates connected in series. At least one fluidized vertical baffle 201 is provided on the surface of each fluidized plate.
[0058] Example 3
[0059] Example 2 was repeated, except that the inclination angle of the fluidized bed 2 was 35°.
[0060] Example 4
[0061] Example 3 was repeated, except that the inclination angle of the fluidized bed 2 was 50°.
[0062] Example 5
[0063] Example 4 is repeated, except that a first reflector 107 is horizontally arranged on the inner wall of the feed pipe 101. The top of the fluidized bed 2 is connected to a distribution platform 202 extending horizontally away from the fluidized bed 2. The first reflector 107 is located above the opposite side of the distribution platform 202.
[0064] Example 6
[0065] Example 5 is repeated, except that a vertical overflow plate is further provided at the outer end of the first reflection plate 107 .
[0066] Example 7
[0067] Example 6 is repeated, except that the device further includes a rapping mechanism 5 , which is disposed in the exhaust duct 104 and located on a side of the retaining screen 3 away from the air outlet chamber 106 , and the retaining screen 3 is periodically rapped by the rapping mechanism 5 .
[0068] Example 8
[0069] Example 7 is repeated, except that the rapping mechanism 5 includes a fixed seat, a rapping arm, a rapping hammer and a rapping drive. The fixed seat is fixed on the pipe wall of the exhaust duct 104, the rapping hammer is connected to the fixed seat through the rapping arm, and the rapping drive is arranged on one side of the fixed seat, and drives the rapping arm to drive the rapping hammer to rap the retaining screen 3.
[0070] Example 9
[0071] The embodiment 8 is repeated, except that the device further comprises a buffer bin 6. The buffer bin 6 is arranged below the wind screen box 1, and the top feed port of the buffer bin 6 is connected to the discharge pipe 102. A discharge port 601 is arranged at the bottom of the buffer bin 6.
[0072] Example 10
[0073] Example 9 is repeated, except that the air supply duct 4 is arranged on the buffer bin 6 and located at the upper part of the side wall of the buffer bin 6 away from the discharge duct 102.
[0074] Embodiment 11
[0075] Example 10 is repeated, except that a gate valve 7 is horizontally arranged at the discharge port 601. The gate valve 7 comprises a hand wheel 701, a valve stem 702, a sealing seat 703, a support mechanism 704, a hinge seat 705 and a valve plate 706 which are arranged in series in sequence. The hand wheel 701, the valve stem 702, the sealing seat 703 and the support mechanism 704 are located outside the discharge port 601, the hinge seat 705 and the valve plate 706 are located inside the discharge port 601, and the valve stem 702 is controlled by the hand wheel 701 to drive the valve plate 706 to open and close the discharge port 601.
[0076] Example 12
[0077] Example 11 is repeated, except that a bypass discharge pipe 602 is further provided on the side of the buffer bin 6 away from the material source at the discharge port 601 according to the direction of the material. A material dividing baffle 603 is vertically provided on the bottom wall of the buffer bin 6 between the discharge port 601 and the bypass discharge pipe 602.
[0078] Embodiment 13
[0079] Repeat Example 12, except that the height of the material distribution baffle 603 is not higher than half of the total height of the buffer bin 6.
[0080] Embodiment 14
[0081] Repeat Example 13, except that the height of the material distribution baffle 603 is not higher than one third of the total height of the buffer bin 6.
[0082] Embodiment 15
[0083] The embodiment 14 is repeated, except that a second reflecting plate 604 is further provided on the side wall of the buffer bin 6 below the feed port at the top of the buffer bin 6. A vertical overflow plate is further provided at the outer end of the second reflecting plate 604.
[0084] Example 16
[0085] Example 15 is repeated, except that discharge observation ports are further provided at the top of the buffer bin 6 and at the top of the bypass discharge pipe 602.
[0086] Embodiment 17
[0087] The embodiment 16 is repeated, except that the discharge pipe 102 is an inclined discharge chute, and a plurality of discharge vertical baffles 108 perpendicular to the bottom of the discharge chute are provided on the inner bottom wall of the discharge chute. An iron remover 109 is provided on the top wall of the discharge chute.
[0088] Embodiment 18
[0089] Example 17 is repeated, except that a wind screen observation port 111 and a wind screen material level detector 112 are further provided on the top of the wind screen box 1.
[0090] Embodiment 19
[0091] Example 18 is repeated, except that an inspection door 110 is further provided on the pipe wall of the exhaust duct 104 away from the baffle screen 3.
Claims
1. A wind screening device, characterized in that: The air screen device comprises an air screen box (1), a fluidized bed (2) and a screen (3); a feed pipe (101) is provided at the top of one side of the air screen box (1), and a discharge pipe (102) is provided at the bottom of the other side of the air screen box (1); the fluidized bed (2) is arranged obliquely inside the air screen box (1), and the inside of the air screen box (1) is divided into an air inlet chamber (105) and an air outlet chamber (106); the higher end of the fluidized bed (2) is located below the outlet of the feed pipe (101), and the lower end of the fluidized bed (2) is located above the inlet of the discharge pipe (102). The air inlet chamber (105) is located at the lower side of the fluidized bed (2), and the air outlet chamber (106) is located at the upper side of the fluidized bed (2); an air inlet duct (103) is arranged on the bottom wall of the air inlet chamber (105) opposite to the fluidized bed (2); an exhaust duct (104) is arranged on the side wall of the air outlet chamber (106) opposite to the fluidized bed (2); the retaining screen (3) is arranged vertically between the exhaust duct (104) and the air outlet chamber (106); and an air supply duct (4) connected to the discharge duct (102) is arranged on the discharge duct (102).
2. The device according to claim 1, characterized in that: The fluidized bed (2) is composed of a plurality of fluidizing plates connected in series; at least one fluidizing vertical baffle (201) is provided on the surface of each fluidizing plate.
3. The device according to claim 1, characterized in that: The inclination angle of the fluidized bed (2) is 30-70°.
4. The device according to claim 3, characterized in that: The inclination angle of the fluidized bed (2) is 40-60°.
5. The device according to any one of claims 1 to 4, characterized in that: A first reflection plate (107) is horizontally arranged on the inner wall of the feed pipe (101); the top of the fluidized bed (2) is connected to a distribution platform (202) extending horizontally toward a side away from the fluidized bed (2); and the first reflection plate (107) is located above the opposite side of the distribution platform (202).
6. The device according to claim 5, characterized in that: A vertical overflow plate is also provided at the outer end of the first reflection plate (107).
7. The device according to any one of claims 1 to 4, characterized in that: The device further comprises a vibration mechanism (5), wherein the vibration mechanism (5) is arranged in the exhaust duct (104) and is located on a side of the retaining screen (3) away from the air outlet chamber (106), and the retaining screen (3) is periodically vibrated by the vibration mechanism (5).
8. The device according to claim 5, characterized in that: The device further comprises a vibration mechanism (5), wherein the vibration mechanism (5) is arranged in the exhaust duct (104) and is located on a side of the retaining screen (3) away from the air outlet chamber (106), and the retaining screen (3) is periodically vibrated by the vibration mechanism (5).
9. The device according to claim 7, characterized in that: The rapping mechanism (5) comprises a fixed seat, a rapping arm, a rapping hammer and a rapping drive, wherein the fixed seat is fixed to the pipe wall of the exhaust duct (104), the rapping hammer is connected to the fixed seat via the rapping arm, and the rapping drive is arranged on one side of the fixed seat and drives the rapping arm to drive the rapping hammer to rap the retaining screen (3).
10. The device according to claim 8, characterized in that: The rapping mechanism (5) comprises a fixed seat, a rapping arm, a rapping hammer and a rapping drive, wherein the fixed seat is fixed to the pipe wall of the exhaust duct (104), the rapping hammer is connected to the fixed seat via the rapping arm, and the rapping drive is arranged on one side of the fixed seat and drives the rapping arm to drive the rapping hammer to rap the retaining screen (3).
11. The device according to any one of claims 1 to 4, characterized in that: The device further comprises a buffer bin (6); the buffer bin (6) is arranged below the wind screen box (1), and a top feed port of the buffer bin (6) is connected to a discharge pipe (102); a discharge port (601) is arranged at the bottom of the buffer bin (6).
12. The device according to claim 5, characterized in that: The device further comprises a buffer bin (6); the buffer bin (6) is arranged below the wind screen box (1), and a top feed port of the buffer bin (6) is connected to a discharge pipe (102); a discharge port (601) is arranged at the bottom of the buffer bin (6).
13. The device according to claim 7, characterized in that: The device further comprises a buffer bin (6); the buffer bin (6) is arranged below the wind screen box (1), and a top feed port of the buffer bin (6) is connected to a discharge pipe (102); a discharge port (601) is arranged at the bottom of the buffer bin (6).
14. The device according to claim 11, characterized in that: The air supply duct (4) is arranged on the buffer bin (6) and is located at an upper portion of a side wall of the buffer bin (6) away from the discharge duct (102).
15. The device according to claim 12 or 13, characterized in that: The air supply duct (4) is arranged on the buffer bin (6) and is located at an upper portion of a side wall of the buffer bin (6) away from the discharge duct (102).
16. The device according to claim 11, characterized in that: A gate valve (7) is horizontally arranged at the discharge port (601); the gate valve (7) comprises a hand wheel (701), a valve stem (702), a sealing seat (703), a support mechanism (704), a hinge seat (705) and a valve plate (706) which are arranged in series in sequence; the hand wheel (701), the valve stem (702), the sealing seat (703) and the support mechanism (704) are located outside the discharge port (601), the hinge seat (705) and the valve plate (706) are located inside the discharge port (601), and the valve stem (702) is controlled by the hand wheel (701) to drive the valve plate (706) to open and close the discharge port (601).
17. The device according to claim 12 or 13, characterized in that: A gate valve (7) is horizontally arranged at the discharge port (601); the gate valve (7) comprises a hand wheel (701), a valve stem (702), a sealing seat (703), a support mechanism (704), a hinge seat (705) and a valve plate (706) which are arranged in series in sequence; the hand wheel (701), the valve stem (702), the sealing seat (703) and the support mechanism (704) are located outside the discharge port (601), the hinge seat (705) and the valve plate (706) are located inside the discharge port (601), and the valve stem (702) is controlled by the hand wheel (701) to drive the valve plate (706) to open and close the discharge port (601).
18. The device according to claim 16, characterized in that: According to the direction of the material, a bypass discharge pipe (602) is also provided on the side of the buffer bin (6) away from the material source at the discharge port (601); and a material distribution baffle (603) is vertically provided on the bottom wall of the buffer bin (6) between the discharge port (601) and the bypass discharge pipe (602).
19. The device according to claim 17, characterized in that: According to the direction of the material, a bypass discharge pipe (602) is also provided on the side of the buffer bin (6) away from the material source at the discharge port (601); and a material distribution baffle (603) is vertically provided on the bottom wall of the buffer bin (6) between the discharge port (601) and the bypass discharge pipe (602).
20. The device according to claim 18 or 19, characterized in that: The height of the material distribution baffle (603) is no higher than two thirds of the total height of the buffer bin (6).
21. The device according to claim 20, characterized in that: The height of the material distribution baffle (603) is one fifth to one half of the total height of the buffer bin (6).
22. The device according to claim 18 or 19, characterized in that: A second reflecting plate (604) is also provided on the side wall of the buffer bin (6) below the top feed port of the buffer bin (6); a vertical overflow plate is also provided at the outer end of the second reflecting plate (604); and / or A discharge observation port is also provided at the top of the buffer bin (6) and / or at the top of the bypass discharge pipe (602).
23. The device according to any one of claims 1-5, 6, 8-10, 12-14, 16, 18-19, 21, characterized in that: The discharge pipe (102) is an inclined discharge chute, and a plurality of vertical discharge baffles (108) perpendicular to the bottom of the discharge chute are provided on the inner bottom wall of the discharge chute; an iron remover (109) is provided on the top wall of the discharge chute.
24. The device according to any one of claims 1-5, 6, 8-10, 12-14, 16, 18-19, 21, characterized in that: A wind screen observation port (111) and a wind screen material level detector (112) are also provided on the top of the wind screen box (1); and / or An inspection door (110) is also provided on the wall of the exhaust duct (104) on the side away from the retaining screen (3).