Electric dust remover and dust removal and denitration integrated device

Abstract

The utility model relates to the field of flue gas dust removal and denitration, in particular to an electric dust remover and a dust removal and denitration integrated device, and the electric dust remover is provided with a flue gas inlet positioned at the top, an electric field area positioned inside and a dust falling area positioned below the electric field area; an ash outlet is formed in the bottom of the electric dust remover, and an ash cleaning device is arranged below the ash outlet; the air bellow is arranged on the outer side support of the dust falling area, and an air duct is arranged on the side wall of the air bellow; the denitration reaction chamber is provided with a flue gas outlet positioned at the top, an ammonia inlet device positioned on the side wall and a flue gas guide device positioned inside. An air bellow and an air duct are arranged, so that dust on a V-shaped plate of the gas-solid separation channel can be blown into a dust collecting hopper, and the situation that the dust blocks the gas-solid separation channel and influences the flow speed of flue gas is avoided; the flue gas guide device prolongs the retention time of flue gas in the denitration reaction chamber, so that nitrogen oxide and ammonia water can fully react; and the ash removal device prevents a conical dust pile from being formed below the ash outlet, so that the risk of blocking the ash outlet is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of flue gas dedusting and denitration, in particular to an electric dust collector and a dedusting and denitration integrated device. BACKGROUND

[0002] The electric dust collector is a necessary supporting equipment for thermal power plants, and its function is to remove the particulate smoke in the flue gas discharged by the coal-fired or oil-fired boiler, thereby greatly reducing the amount of smoke discharged into the atmosphere, which is an important environmental protection equipment for improving environmental pollution and air quality. In order to save the floor area, the electric dust collector and the denitration reaction equipment are usually assembled together to form a dedusting and denitration integrated device on the market.

[0003] Patent No. 2024201066363 discloses an electric dust collector and a dedusting and denitration integrated device. The technical defect is that the dust baffle forms a dust blocking groove with an opening facing the smoke direction, so that the flue gas in the dust removal bin can enter the dust blocking groove through the opening. After the flue gas enters the dust blocking groove through the opening, the dust is intercepted in the dust blocking groove. When the dust in the dust blocking groove is full, it falls into the ash bucket. However, the dust in the dust blocking groove will not automatically fall into the ash bucket after it is full, but will adhere to the dust baffle and block the dust blocking groove. Over time, the efficiency of flue gas circulation will be reduced. Only the anode frame and the cathode frame are considered to determine whether to set an auxiliary dust removal device according to the dust properties. However, no dust removal device is provided for the dust in the ash bucket. When the dust in the ash bucket accumulates to a certain extent and is not cleaned in time, a conical dust pile will be formed below the ash outlet, which will block the ash outlet.

[0004] The process of removing nitrogen oxides from combustion flue gas has been sharply raised as a world problem due to its importance in preventing environmental pollution. The more mainstream process in the world is divided into SCR and SNCR. Selective catalytic reduction (SCR) is a widely used denitration method. During the denitration reaction, how to prolong the residence time of flue gas in the reaction bin to maximize the reaction with ammonia water to remove nitrogen oxides has become a problem to be solved. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an electric dust collector and a dedusting and denitration integrated device to solve the problems raised in the background technology.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions.

[0007] The utility model provides a kind of electric dust collector, it includes: electric dust collector, the electric dust collector is equipped with located top flue gas inlet, located inside electric field area and located below electric field area dust falling area;The bottom of the electric dust collector is opened ash outlet, the lower portion of the ash outlet is equipped with dust cleaning device;Ash collecting hopper is equipped below ash outlet;Air bellow is equipped on the outside support of dust falling area, the sidewall of the air bellow is opened air cylinder, the air cylinder extends to the inside of dust falling area through electric dust collector sidewall;The dust falling area is equipped with the gas-solid separation passage of uniform distribution "V" shape plate, the air cylinder is opposite gas-solid separation passage.

[0008] Some embodiments of the application, the electric field area is provided with vibration rapping mechanical arm, suspension device, cathode plate, anode plate, the cathode plate, anode plate is vertically arranged in the inside of electric field area.

[0009] Some embodiments of the application, the vibration rapping mechanical arm, suspension device, cathode plate, anode plate are all equipped with multiple, the vibration rapping mechanical arm is connected with the top of anode plate and is arranged in the sidewall of electric dust collector;The suspension device is arranged on vibration rapping mechanical arm and is connected with the top of cathode plate.

[0010] Some embodiments of the application, the anode plate is uniformly distributed arc convex.

[0011] Some embodiments of the application, the dust cleaning device includes coaxial seat arranged symmetrically below ash outlet and electric raking plate arranged on coaxial seat.

[0012] Some embodiments of the application, the suspension device is equipped with insulation protective layer and suspension wire, and the suspension wire is connected to the top of the cathode plate.

[0013] The utility model also provides a kind of dust removal denitration integrated device, it includes electric dust collector and denitration reaction chamber;The electric dust collector uses the electric dust collector of any one of the above-mentioned embodiments;The denitration reaction chamber is equipped with located top flue gas outlet, located side wall's ammonia inlet device and located inside flue gas flow guide device;The insulating partition is equipped between the denitration reaction chamber and electric dust collector, and the flue gas outlet bottom is erected denitration agent layer plate.

[0014] Some embodiments of the application, the ammonia inlet device includes ammonia water atomizer and temperature controller, and the temperature controller is arranged above the ammonia water atomizer.

[0015] Some embodiments of the application, the flue gas flow guide device is opened multiple partitions, and "back" type flue gas passage is arranged between adjacent partitions.

[0016] Some embodiments of the application, the flue gas flow guide device is opened multiple partitions, and exhaust grille is arranged between adjacent partitions.

[0017] From the above technical solution, the utility model embodiment has at least the following advantages and positive effects:

[0018] The flue gas enters the electric field area from the flue gas inlet in the electric dust collector, a large number of negative ions are generated by the cathode plate when the flue gas passes through the electric field area, the negative ions are adsorbed on the surface of the dust after colliding with the dust, the dust is charged, the dust after being charged is deposited on the surface of the anode plate and releases the electric charge under the action of the electric field force, the anode plate is uniformly distributed with arc-shaped protrusions, the contact area of the anode plate is increased, and the dust after being charged is attached conveniently

[0019] The dust is shaken off and falls into the dust collecting hopper below from the bottom dust outlet under the action of gravity, the conical dust pile accumulated in the dust collecting hopper is pushed away by the dust cleaning device, and the dust outlet is prevented from being blocked by the accumulated dust.

[0020] The dust adhered to the "V"-shaped plate in the channel is blown off by the wind drum and the wind box arranged opposite the gas-solid separation channel, which is beneficial to improving the efficiency of flue gas flow from the electric dust collector to the denitration reaction chamber; the flue gas guide device is arranged to prolong the residence time of the flue gas containing nitrogen oxides in the denitration reaction chamber, so that the nitrogen oxides can be removed by reacting with ammonia water to the maximum extent; the ammonia removal agent layer plate is arranged at the bottom of the flue gas outlet, ammonia gas escaping due to high temperature can be removed by physical adsorption, and the environment is prevented from being polluted by ammonia gas escaping from the flue gas outlet without reacting with nitrogen oxides in time due to excessive ammonia injection by the ammonia water atomizer. BRIEF DESCRIPTION OF DRAWINGS

[0021] The various objects, features and advantages of the present application will become more apparent by examining the following detailed description of preferred embodiments of the present application taken in conjunction with the accompanying drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the present application. In the drawings, like reference numerals identify like parts throughout the views. Among other things:

[0022] Figure 1 is a front view of a dust and denitration integrated device according to an embodiment of the present application.

[0023] Figure 2 is Figure 1 is a front view of a flue gas guide device according to another embodiment in the denitration reaction chamber.

[0024] Figure 3 is Figure 1 is a structural schematic view of a suspension device in the electric field area in the electric dust collector.

[0025] The reference signs are explained as follows: 1, denitration reaction chamber; 2, electric dust collector; 3, ammonia inlet device; 5, vibrating rapping mechanical arm; 6, cathode plate; 7, anode plate; 8, arc-shaped protrusion; 9, wind box; 10, air duct; 11, flue gas outlet; 12, ash outlet; 13, ash cleaning device; 14, ammonia water atomizer; 15, flue gas flow guide device; 16, temperature controller; 17, ash collecting hopper; 18, outer support; 19, insulating partition; 21, flue gas inlet; 101, gas-solid separation channel; 102, suspension device; 103, electric field area; 104, insulating protective layer; 105, "U" shaped flue gas channel; 106, suspension wire; 107, exhaust grid; 108, dust falling area; 111, denitrating agent layer plate; 121, electric rapping plate; 131, coaxial seat. DETAILED DESCRIPTION

[0026] While the present application can be susceptible to embodiment in different forms, only some of the specific embodiments are shown and described in detail in the drawings and the specification herein, it being understood that the specification is to be considered an exemplification of the principles of the application and is not intended to limit the application to that as described herein.

[0027] Thus, one feature that is described in the specification will be used to describe one feature of an embodiment of the application, and not imply that every embodiment of the application must have that described feature. Furthermore, it should be noted that the specification describes many features. Although certain features can be combined together to show possible system designs, these features can also be used in other combinations not explicitly described. Thus, unless otherwise noted, the described combinations are not intended to be limiting.

[0028] In the embodiments shown in the drawings, the indications of direction, such as up, down, left, right, front and back, are used to explain the structure and movement of the various elements of the application are not absolute but relative. These indications are appropriate when the elements are in the position shown in the drawings. If the position of the elements changes, the indications of direction also change accordingly.

[0029] Reference is made to Figure 1The utility model provides a kind of electric dust collector, comprising: electric dust collector 2, electric dust collector 2 is equipped with the flue gas inlet 21 of top, the electric field area 103 of inside and the dust falling area 108 below electric field area 103;The bottom of electric dust collector 2 is opened ash outlet 12, and the dust cleaning device 13 is equipped below ash outlet 12;Ash collecting hopper 17, it is below ash outlet 12;Air bellow 9, it is on the outside support of dust falling area 108, air bellow 9 side wall is opened air cylinder 10, air cylinder 10 is extended to dust falling area 108 inside through electric dust collector 2 side wall;Dust falling area 108 is equipped with the gas-solid separation channel 101 of uniform distribution "V" shape plate, air cylinder 10 is opposite gas-solid separation channel 101, under the action of air cylinder 10, dust adhered on the "V" shape plate of gas-solid separation channel 101 can be all blown and falls into ash collecting hopper 17, improve the flow rate of flue gas on gas-solid separation channel 101.

[0030] Electric field area 103 is provided with vibration rapping mechanical arm 5, suspension device 102, cathode plate 6, anode plate 7, and cathode plate 6 and anode plate 7 are vertically arranged in the inside of electric field area 103.

[0031] Vibration rapping mechanical arm 5, suspension device 102, cathode plate 6 and anode plate 7 are all equipped with multiple, vibration rapping mechanical arm 5 is connected with the top of anode plate 7 and is arranged on the side wall of electric dust collector 2;Suspension device 102 is arranged on vibration rapping mechanical arm 5 and is connected with the top of cathode plate 6, vibration rapping mechanical arm 5 is vibrated to anode plate 7 to make dust adhered on anode plate 7 fall into ash collecting hopper 17.

[0032] Anode plate 7 is uniformly distributed with arc-shaped protrusion 8, and the arc-shaped protrusion 8 can be arranged in an arc shape or a trapezoidal shape, so as to increase the contact area of the anode plate 7 and make it easier to adhere to the charged dust.

[0033] Please refer to Figure 3 , dust cleaning device 13 includes coaxial seat 131 symmetrically arranged below ash outlet 12 and electric raking plate 121 arranged on coaxial seat 131, coaxial seat 131 facilitates horizontal reciprocating swing of electric raking plate 121 to clean dust, to prevent the formation of conical dust pile below ash outlet 12 from blocking ash outlet 12. Suspension device 102 is provided with an insulating protective layer 104 and a suspension wire 106, the suspension wire 106 is connected to the top of the cathode plate 6, and the suspension wire 106 is made of an insulating material.

[0034] Please refer to Figure 1 The utility model also provides a dust removal and denitration integrated device, which comprises: an electric dust collector 2 and a denitration reaction chamber 1.

[0035] The denitration reaction chamber 1 is provided with a flue gas outlet 11 at the top, an ammonia inlet device 3 at the side wall, and a flue gas guide device 15 inside; an insulating partition 19 is arranged between the denitration reaction chamber 1 and the electric dust collector 2, and a denitration agent layer plate 111 is arranged at the bottom of the flue gas outlet 11.

[0036] The ammonia inlet device 3 comprises an ammonia water atomizer 14 and a temperature controller 16, the temperature controller 16 is arranged above the ammonia water atomizer 14, the ammonia water atomizer 14 is arranged vertically close to the side wall of the denitration reaction chamber 1 in a plate type, and the temperature controller 16 is a common temperature controller on the market, which is an automatic control element, mainly used for automatically adjusting the running state of the equipment according to the change of the environmental temperature, so as to achieve the effect of constant temperature or energy saving, which is used to maintain the appropriate reaction temperature range (usually 850-1100℃) in this embodiment, so as to avoid incomplete reaction caused by too low temperature or ammonia oxidation reaction caused by too high temperature, thereby reducing ammonia escape.

[0037] The first embodiment of the flue gas guide device 15 is provided with a plurality of partitions, the partitions are arranged horizontally from top to bottom, a "U" type flue gas passage 105 is arranged between adjacent partitions, the partitions are connected through the "U" type flue gas passage 105, the flue gas coming from the gas-solid separation passage 101 is guided by the partitions and the "U" type flue gas passage 105, which not only prolongs the residence time of the flue gas containing nitrogen oxides in the denitration reaction chamber, so that the flue gas can react with ammonia water to remove nitrogen oxides, but also increases the flow rate of the flue gas in the "U" type flue gas passage 105, thereby improving the reaction efficiency.

[0038] Please refer to Figure 2 , the second embodiment of the flue gas guide device 15 is provided with a plurality of partitions, the partitions are arranged horizontally from top to bottom, and the difference from the first embodiment is that an exhaust grille 107 is arranged between adjacent partitions, which has the same effect as the first embodiment, that is, prolonging the residence time of the flue gas containing nitrogen oxides in the denitration reaction chamber, so that the ammonia water can be fully mixed with the nitrogen oxides to improve the denitration efficiency. Of course, in addition to arranging the exhaust grille 107 between adjacent partitions, other auxiliary passages with the same effect can also be arranged.

[0039] The denitration reaction chamber 1 and the electric dust collector 2 are integrally connected through the shared insulating partition 19, which not only reduces the floor area, but also saves the manufacturing materials.

[0040] The insulating partition 19 is provided below with a gas-solid separation passage 101 with uniformly distributed "V" shaped plates, and the "V" shaped plates are arranged in the gas-solid separation passage 101 by rotating clockwise by 90 degrees, which is used to block the dust falling in the dust falling area from being carried into the denitration reaction chamber 1 by the horizontal flue gas.

[0041] The denitration agent layer plate 111 is arranged at the bottom of the flue gas outlet 11, the denitration agent can adsorb the escaped ammonia gas by physical action to form a complex adsorption state of ammonia, thereby avoiding the pollution of the environment by the escaped ammonia gas.

[0042] The electric dust collector 2 and the denitration reaction chamber 1 are connected together through the integrated device, land occupation and manufacturing cost are saved, the air bellow 9 and the air cylinder 10 facilitate the dust on the gas-solid separation channel 101 V-shaped plate to be blown into the dust hopper 17, and the dust is prevented from blocking the gas-solid separation channel 101 to affect the flue gas flow rate; the flue gas guide device 15 prolongs the residence time of the flue gas in the denitration reaction chamber 1, so that the nitrogen oxide and the ammonia water can fully react; and the dust cleaning device 13 avoids the formation of a conical dust pile below the dust outlet 12, and reduces the risk of blocking the dust outlet 12.

[0043] Although the utility model has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than limiting terms. Since the utility model can be embodied in various forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the above-mentioned details, but should be interpreted broadly within the spirit and scope defined by the appended claims, and therefore all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An electrostatic precipitator characterized by comprising: It includes: The electric dust collector (2) is provided with a flue gas inlet (21) at the top, an electric field area (103) inside, and a dust falling area (108) below the electric field area (103); the bottom of the electric dust collector (2) is provided with a dust outlet (12), and the lower side of the dust outlet (12) is provided with a dust cleaning device (13); a dust collecting hopper (17) is arranged below the dust outlet (12); a bellows (9) is arranged on the outer side support (18) of the dust falling area (108), the sidewall of the bellows (9) is provided with a wind pipe (10), and the wind pipe (10) extends through the sidewall of the electric dust collector (2) to the inside of the dust falling area (108); the dust falling area (108) is provided with a gas-solid separation channel (101) with uniformly distributed "V" shaped plates, and the wind pipe (10) is opposite to the gas-solid separation channel (101).

2. An electrostatic precipitator according to claim 1, wherein The electric field area (103) is provided with a vibrating dusting mechanical arm (5), a suspension device (102), a cathode plate (6) and an anode plate (7), and the cathode plate (6) and the anode plate (7) are vertically arranged in the electric field area (103).

3. An electrostatic precipitator according to claim 2, wherein The vibrating dusting mechanical arm (5), the suspension device (102), the cathode plate (6) and the anode plate (7) are all provided with a plurality of the vibrating dusting mechanical arm (5) and the anode plate (7) are connected at the top and arranged on the sidewall of the electric dust collector (2); the suspension device (102) is arranged on the vibrating dusting mechanical arm (5) and connected to the top of the cathode plate (6).

4. An electrostatic precipitator according to any one of claims 2, 3, wherein The anode plate (7) is uniformly provided with an arc-shaped protrusion (8).

5. An electrostatic precipitator according to claim 1 wherein, The dust cleaning device (13) includes coaxial seats (131) symmetrically arranged below the dust outlet (12) and electric dusting plates (121) arranged on the coaxial seats (131).

6. An electrostatic precipitator according to any one of claims 2, 3, wherein The suspension device (102) is provided with an insulation protection layer (104) and a suspension wire (106), and the suspension wire (106) is connected to the top of the cathode plate (6).

7. A dust removal and denitration integrated device, characterized in that, It includes an electric dust collector (2) and a denitration reaction chamber (1); the electric dust collector (2) adopts any one of the electric dust collectors (2) in claims 1-6; the denitration reaction chamber (1) is provided with a flue gas outlet (11) at the top, an ammonia inlet device (3) on the sidewall and a flue gas flow guide device (15) inside; an insulation partition (19) is arranged between the denitration reaction chamber (1) and the electric dust collector (2), and a denitration agent layer plate (111) is arranged on the bottom of the flue gas outlet (11).

8. The dust removal and denitration integrated device according to claim 7, characterized in that, The ammonia inlet device (3) includes an ammonia water atomizer (14) and a temperature controller (16), and the temperature controller (16) is arranged above the ammonia water atomizer (14).

9. The dust removal and denitration integrated device according to claim 7, characterized in that, The flue gas flow guide device (15) is provided with a plurality of partitions, and a "return" type flue gas channel (105) is arranged between adjacent partitions.

10. The dust removal and denitration integrated device according to claim 7, characterized in that, The flue gas flow guide device (15) is provided with a plurality of partitions, and an exhaust grille (107) is arranged between adjacent partitions.

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