CN106238211B - A self-adjusting fast wet electrostatic precipitator - Google Patents

Abstract

The invention discloses a self-adjusting fast wet electrostatic precipitator, which includes a machine body, the lower part of which is provided with an air intake pipe, the air intake pipe is located in the body and is provided with an air inlet, the air inlet is open up and down and The lower part is provided with a slanted baffle, and a spray chamber is arranged above the air inlet in the body, and a second spray part and a first spray part are arranged in the spray chamber from top to bottom. The lower side of the spray chamber is provided with an inclined side wall, and the two sides of the first spray part are inclined to form an air flow channel with the side wall. The middle part of the spray chamber is provided with an air outlet for the air flow to leave, and the spray chamber is connected with A water pipe for water supply, the water pipe is provided with a control valve. Compared with the prior art, the present invention has simple and reliable structure, convenient manufacture, low cost, long service life and high dust removal efficiency.

Description

A self-adjusting fast wet electrostatic precipitator

technical field

The invention relates to the field of wet electrostatic precipitators, in particular to an automatically adjustable fast wet electrostatic precipitator.

Background technique

The equipment that separates dust from flue gas is called dust collector or dust removal equipment. The performance of the dust collector is expressed by the amount of gas that can be handled, the resistance loss when the gas passes through the dust collector, and the dust removal efficiency. At the same time, the price, operation and maintenance costs, service life and difficulty of operation and management of the dust collector are also important factors to consider its performance. Dust collectors are commonly used facilities in boilers and industrial production.

According to the dust removal method, the dust collector is divided into: dry dust collector, semi-dry dust collector and wet dust collector.

Wet electrostatic precipitator is a new dust removal equipment used to deal with trace dust and fine particles. It is mainly used to remove dust, acid mist, water droplets, aerosol, odor, PM2.5 and other harmful substances in wet gas. It is an ideal equipment for controlling air dust pollution.

The wet electrostatic precipitator uses liquid to wash the surface of the dust collector to clean the dust, which can effectively collect fine particles (PM2.5 dust, SO3 acid mist, aerosol), heavy metals (Hg, As, Se, Pb, Cr), organic pollution substances (polycyclic aromatic hydrocarbons, dioxins), etc. After using the wet electrostatic precipitator, the dust emission in the wet flue gas can reach 10mg/m3 or even below 5mg/m3. The dust collection performance has nothing to do with the dust characteristics. It is suitable for the treatment of wet flue gas, especially in power plants and steel mills. For the treatment of dusty flue gas after desulfurization by desulfurization method, but the investment cost of equipment is relatively high, and it needs to be used in conjunction with other dust removal equipment, and its investment technology economy and operation cost should be evaluated from the whole.

Wet electrostatic precipitators have several structural forms, one is to use corrosion-resistant conductive materials (which can be non-metallic materials with excellent electrical conductivity or metal materials with corrosion-resistant properties) as dust collectors, and the other is to use water-sprayed Or the overflow water forms a conductive water film and a non-conductive non-metallic material as a dust collector.

Wet electrostatic precipitators can also be divided into cross flow type (horizontal) and vertical flow type (vertical). Tubular structure, gas flow in and out in the vertical direction. Generally speaking, the efficiency of the vertical flow wet electrostatic precipitator is twice that of the cross flow type under the same ventilation cross-sectional area.

The dust deposited on the plate can be washed down by water. Wet dust cleaning can avoid the re-flying of the collected dust and achieve high dust removal efficiency. Because there is no rapping device, the operation is also more reliable. The device that uses water spray or overflow water to form a conductive film on the surface of the dust collector has corrosion, sludge and sewage treatment problems, and it is only used when the gas dust concentration is low and the dust collection efficiency is required to be high; use The wet electrostatic precipitator made of corrosion-resistant and conductive materials does not need long-term water spray or overflow water, only regularly flushes according to the system operating conditions, consumes only a small amount of water, this part of the water can be recycled and recycled, and the dust collection system is basically No secondary pollution.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a self-adjusting fast wet electrostatic precipitator, which has simple and reliable structure, convenient manufacture, low cost, long service life and high dust removal efficiency.

In order to solve the above-mentioned technical problems, the present invention is solved by the following technical solutions: a self-adjusting fast wet electrostatic precipitator, including a body, the lower part of the body is provided with an air inlet pipe and the upper part is connected with an air outlet pipe, and the air inlet pipe is located at An air inlet is arranged in the body, the upper and lower openings of the air inlet and a slanted baffle are arranged at the bottom, and a spray chamber is arranged above the air inlet in the body, and the inside of the spray chamber is from the top to the top. The second spraying part and the first spraying part are arranged at the bottom, and the lower side of the spray chamber is provided with inclined side walls, and the two sides of the first spraying part are inclined so as to form an air flow channel with the side walls. The middle part of the bin is provided with an air outlet for air flow to leave, and the spray bin is connected with a water supply pipe, and a control valve is arranged on the water pipe, and an electric field dust removal area is arranged above the spray bin inside the body, and the The body is located above the electric field dedusting area and is provided with a spraying pipe, the spraying pipe is provided with several nozzles, and the body is located below the electric field dedusting area with a protruding plate, and the plate is provided with a waterproof switch. A second storage platform is provided on the outer wall of the body, and a water pump is provided on the second storage platform. The water pump includes a water drawing pipe and a drainage pipe, and the drainage pipe is connected to the spraying pipe. The top of the water pump is provided with a A controller, the controller is connected to the waterproof switch with electrical signals, the outlet pipe is provided with an impeller part, the impeller part is provided with an impeller, and the impeller is connected with a pulley arranged outside the impeller part, the The side wall of the body is provided with a first storage platform, and a movable platform is arranged on the first storage platform, and four guide columns are arranged on the first storage platform, and the guide columns pass through the movable platform and The movement of the movable platform produces a guiding effect, the end of the guide column is provided with a limit stopper, a pressure-bearing spring is arranged between the first storage platform and the movable platform, and a motor is installed on the movable platform. The output end of the motor and the pulley are connected through a belt to realize belt transmission. A nut is fixedly arranged in the middle of the first storage platform, and an adjusting screw is threadedly connected to the nut. The upper end of the adjusting screw is provided with a The pressure bearing plate of the movable platform, the lower end of the adjusting screw is provided with a handle.

In the above technical solution, preferably, the pulley includes a first pulley, a second pulley and a third pulley, and the first pulley, the second pulley and the third pulley can all be The output end of the motor is connected through a belt, and the output end of the motor is only connected to the only pulley of the first pulley, the second pulley or the third pulley at the same time.

In the above technical solution, preferably, the electric field dedusting area includes several dust-collecting pole plates, the dust-collecting pole plates are arranged on a support frame, and the support frame is installed on the installation groove on the inner wall of the body, and in the installation groove A spring supporting the support frame is arranged inside.

In the above technical solution, preferably, a gas collecting part is arranged above the body, and the gas collecting part is connected with the gas outlet pipe so as to transport the gas after dust removal in the body out of the body.

In the above technical solution, preferably, an ash hopper is provided at the bottom of the body, and the ash hopper is provided with a sewage outlet and is connected to the sedimentation tank through the sewage outlet.

The invention has the characteristics of high dust removal efficiency, small pressure loss, simple operation, low energy consumption, no secondary dust, low maintenance cost, short production downtime, and can work below the flue gas dew point temperature, and can be used with It has outstanding advantages such as the combination of other flue gas treatment equipment and the diversification of design forms.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a structural schematic view of the impeller and the pulley of the present invention.

Fig. 3 is a structural schematic diagram of the movable platform and its peripheral parts of the present invention.

detailed description

The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment: As shown in Figure 1 to Figure 3, a kind of fast wet electrostatic precipitator of self-regulation comprises body 1, and described body 1 bottom is provided with air inlet pipe 2 and The upper part is connected with an air outlet pipe 6, the air inlet pipe 2 is located in the body 1 and is provided with an air inlet 21, the air inlet 21 opens up and down and the lower part is provided with a slanted baffle 22, and the air inlet pipe 2 is located in the body 1. A spray chamber 3 is arranged above the air inlet 21, and the second spray part 32 and the first spray part 31 are arranged in the spray chamber 3 from top to bottom, and the lower side of the spray chamber 3 is provided with an inclined The side wall, the two sides of the first spraying part 31 are inclined so as to form an air flow passage with the side wall, and the middle part of the spray chamber 3 is provided with an air outlet 34 for the air flow to leave, and the spray chamber 3 is connected with a water supply pipe 33 , the water pipe 33 is provided with a control valve, the body 1 is provided with an electric field dust removal area 41 above the spray chamber 3, and the body 1 is provided with a spray pipe 5 above the electric field dust removal area 41, The spraying pipeline 5 is provided with several nozzles 51, and the body 1 is located below the electric field dust removal area 41 and is provided with a protruding flat plate 91, the flat plate 91 is provided with a waterproof switch 9, and the outer wall of the body 1 is provided with a There is a second storage platform 81, and a water pump 8 is arranged on the second storage platform 81. The water pump 8 includes a water drawing pipe 82 and a drain pipe 52. The drain pipe 52 is connected to the spray pipeline 5. The water pump 8 A controller 83 is arranged on the top, and the controller 83 is electrically connected to the waterproof switch 9. The air outlet pipe 6 is provided with an impeller part 62, and an impeller 64 is arranged inside the impeller part 62, and the impeller 64 is connected to the There is a pulley 63 arranged outside the impeller portion 62, a first storage platform 71 is arranged on the side wall of the body 1, and a movable platform 73 is movably arranged on the first storage platform 71, and a movable platform 73 is arranged on the first storage platform 71. Four guide columns 74 are provided, and the guide columns 74 pass through the movable platform 73 and produce a guiding effect on the movement of the movable platform 73, and the ends of the guide columns 74 are provided with limit stoppers 741, and the first A bearing spring 742 is arranged between the storage platform 71 and the movable platform 73, a motor 7 is installed on the movable platform 73, and the output end of the motor 7 is connected with the pulley 63 through a belt 72 to realize belt transmission. The middle part of the first storage platform 71 is fixed with a nut 711, and the nut 711 is threadedly connected with an adjustment screw 75, and the upper end of the adjustment screw 75 is provided with a pressure bearing plate 751 against the movable platform 73, the A handle 752 is provided at the lower end of the adjusting screw 75 .

The pulley 63 includes a first pulley 631, a second pulley 632 and a third pulley 633, and the first pulley 631, the second pulley 632 and the third pulley 633 can pass through The belt 72 is connected to the output end of the motor 7, and the output end of the motor 7 is only connected to the first pulley 631, the second pulley 632 or the third pulley 633 at the same time. Connected with wheels.

The electric field dust removal area 41 includes a number of dust-collecting pole plates, the dust-collecting pole plates are arranged on the support frame 4, and the support frame 4 is installed on the installation groove of the inner wall of the body 1, and a support is arranged in the installation groove. The spring of the support frame 4.

A gas collecting part 61 is arranged above the body 1 , and the gas collecting part 61 is connected with the gas outlet pipe 6 so as to transport the gas after dust removal in the body 1 out of the body 1 .

The bottom of the body 1 is provided with an ash hopper, and the ash hopper is provided with a sewage outlet 12 and is connected to the sedimentation tank 11 through the sewage outlet 12 .

The device is provided with a high-voltage electric discharge field on the end of the air intake pipe 2 located at the body 1. When the airflow of the air intake pipe 2 enters, it first passes through the high-voltage electric discharge field, so that the dust and particles in the airflow are charged. Then flow to the air inlet 21. At the air inlet 21 , because it is set with upper and lower openings, the air flow will flow upwards first, thereby entering the spray chamber 3 . In the spray chamber 3, both the second spray part 32 and the first spray part 31 spray water, and the sprayed water can wash away dust and particles, making them fall to the air inlet 21, and then drop to the ash hopper place. The airflow first passes through the water spraying treatment of the first spraying part 31, then flows up and down from the first spraying part 31 and the side wall to form an airflow channel, then passes through the water spraying treatment of the second spraying part 32, and finally leaves from the airflow port 34 Spray chamber 3.

The slanted baffle 22 on the air inlet 21 can guide the incoming airflow and guide the airflow to flow upwards into the spray chamber 3 .

The device is provided with a control valve on the water pipe 33, through which the water flow of the water pipe 33 is controlled.

In the airflow coming out of the spray chamber 3, the larger dust and particles will be washed down by the water, so the airflow will only entrain the small dust and particles, and these impurities are all charged.

The airflow from the spray chamber 3 will further move upwards, and then enter the electric field dust removal area 41 . In the electric field dedusting area 41 , charged impurities will be captured by the dust collecting pole plate under the action of the electric field force due to their electrical properties and gather on the dust collecting pole plate. These impurities have water droplets from the spray chamber 3. After the dust collection plate captures enough impurities, these impurities will form a sewage flow together with the water droplets. Because of the self-generated gravity, the sewage flow flows downward and drips. to the ash hopper below, and then enter the sedimentation tank 11 through the sewage outlet 12.

The device is provided with a spraying pipeline 5. After the spraying pipeline 5 is started to work, water is sprayed on the nozzle 51. After the dusty gas and water are combined, it can be more easily captured by the dust collecting plate of the electric field dust removal area 41. The spray pipe 5 assists the electric field dust removal area 41 to work, so that the dust removal effect of the device is enhanced. The water sprayed by the spraying pipe 5 can also act on the dust-collecting plate of the electric field dust removal area 41 to wash away the impurities on the dust-collecting plate, so as to ensure that its dust-removing ability will not be affected by too many impurities.

This device is provided with waterproof switch 9, and this waterproof switch 9 is positioned at support frame 4 below, and when the impurity on the dust collection pole plate is too much, its weight can increase, so support frame can compress spring and move down. Finally will touch this waterproof switch 9. Now this waterproof switch 9 will be triggered, thereby send electric signal to controller 83, controller 83 just drives water pump 8 to start work, absorbs water from water pipe 82, discharges water from drain pipe 52 to spray pipe 5 again. The nozzle 51 on the sprinkler pipeline 5 has just been able to spray water at last. Therefore, the dust removal ability of the device can be improved.

A gas collection part 61 is arranged above the device, and the gas collection part 61 collects the dust-removed gas in the machine body 1 and then discharges it through the gas outlet pipe 6 .

Therefore, in order to increase the dust removal efficiency, the device is equipped with an airflow acceleration device. The motor 7 drives the impeller 64 to rotate, thereby accelerating the suction of the gas, thus increasing the speed of the airflow, thereby increasing the dust removal efficiency of the dust collector. The device rotates through the impeller, thereby reducing the air pressure of the air outlet pipe 6, thereby accelerating the circulation of the air flow. After the airflow velocity increases, at the airflow turning point of the air inlet 21, due to the effect of inertial force, more impurities will collide on the inclined baffle plate 22, thereby breaking away from the airflow and falling into the ash hopper. After the air flow rate is increased, the gas passing through the electric field dust removal area 41 per unit time can be increased, thereby improving the working efficiency.

And, according to different actual situations, the optimal dust removal efficiency can be achieved. This device is provided with various rotational speeds. The pulley 63 of the device is divided into a first pulley 631, a second pulley 632 and a third pulley 633, and at the same time only one pulley is connected to the motor 7 and driven to rotate by the motor. The diameters of the first pulley 631 , the second pulley 632 and the third pulley 633 increase progressively once, so when they are respectively connected with the motor to drive the impeller 64 to rotate, the rotating speed of the impeller 64 decreases successively. That is, when the first pulley 631 is connected to the motor 7 , the rotation speed of the impeller 64 is maximum; that is, when the third pulley 633 is connected to the motor 7 , the rotation speed of the impeller 64 is minimum.

With this setting, the airflow velocity of the device can be distributed within the range of 3.5-5.5m/s, and divided into three levels, and adjusted according to actual needs, so as to achieve the best dust removal efficiency. Although the device has three pulleys with different diameters, in order to save costs, the belt 72 of the device only adopts one, and the distance between the motor 7 and the pulley 63 is adjusted and matched. The device is provided with an adjusting screw 75 to make the movable platform 73 movable. When the handle 752 is used to drive the adjustment screw 75 to rotate, because the nut 711 is fixed on the first storage platform 71 , the adjustment screw 75 will move relative to the first storage platform 71 . If the adjustment screw 75 moves upward, it will push the pressure bearing plate 751 to move upward against the movable platform 73, thereby raising the motor 7. If the adjusting screw rod 75 moves downward, the pressure bearing plate 751 moves downward, so that the movable platform 73 compresses the pressure bearing spring 742 due to gravity, thereby causing the motor to descend.

Through such a device of this program, the distance between the motor 7 and the pulley 63 can be adjusted freely. Therefore, no matter whether the first pulley 631, the second pulley 632 or the third pulley 633 are used, one belt 72 Just be able to get the job done.

Also, after a long period of use, the belt 72 will be stretched to a certain extent. Now also can adjust motor 7 to guarantee the normal operation of belt transmission.

The impeller provided in the impeller part 62 of the device is integrated with the pulley 63 outside the impeller part, so both can rotate synchronously. The motor 7 is connected to the pulley 63 through the belt 72, and the pulley 63 is driven to rotate rapidly, thereby accelerating the circulation of the air flow.

The scope of protection of the present invention includes but is not limited to the above embodiments. The scope of protection of the present invention is based on the claims. Any replacement, deformation, and improvement that are easily conceived by those skilled in the art for this technology fall within the scope of the present invention. protected range.

The invention has simple and reliable structure, convenient manufacture and low cost, high dust removal efficiency, small pressure loss, simple operation, low energy consumption, no secondary dust, low maintenance cost, short production downtime, and can work below the flue gas dew point temperature. Features, and due to its compact structure, it can be combined with other flue gas treatment equipment, and its design forms are diversified.

Claims (1)

1. a kind of Rapid wet type electric cleaner automatically adjusted, including body（1）, the body（1）Bottom is provided with air inlet pipe （2）And top is connected with escape pipe（6）, it is characterised in that：The air inlet pipe（2）Positioned at the body（1）Inside it is provided with air inlet Mouthful（21）, the air inlet（21）Upper and lower opening and bottom is provided with slanting baffle（22）, the body（1）It is interior to enter described in Gas port（21）Top is provided with spray storehouse（3）, the spray storehouse（3）The second spray portion is inside provided with from top to bottom（32）With first Spray portion（31）, the spray storehouse（3）Downside sets inclined side wall, the first spray portion（31）Both sides tilt so as to and side wall Form gas channel, the spray storehouse（3）Middle part is provided with the airflow orifice that supply stream leaves（34）, the spray storehouse（3）Connection There is the water pipe of water supply（33）, the water pipe（33）On be provided with control valve, the body（1）It is interior to be located at the spray storehouse（3）On Side is provided with electric field dedusting area（41）, the body（1）It is interior to be located at the electric field dedusting area（41）Top is provided with spraying pipe （5）, the spraying pipe（5）It is provided with some nozzles（51）, the body（1）Positioned at the electric field dedusting area（41）Lower section It is provided with prominent flat board（91）, the flat board（91）On be provided with water proof switch（9）, the body（1）Set on lateral wall There is the second object disposing platform（81）, second object disposing platform（81）On be provided with water pump（8）, the water pump（8）Including bailing pipe （82）And drainpipe（52）, the drainpipe（52）With the spraying pipe（5）It is connected, the water pump（8）Top is provided with control Device processed（83）, the controller（83）With the water proof switch（9）Electric signal is connected, the escape pipe（6）On be provided with impeller Portion（62）, the impeller portion（62）Inside it is provided with impeller（64）, the impeller（64）It is connected with and is arranged at impeller portion（62）Outer Belt wheel（63）, the body（1）The first object disposing platform is provided with the wall of side（71）, first object disposing platform（71）Upper activity is set It is equipped with movable platform（73）, first object disposing platform（71）On be provided with four leads（74）, the lead（74）Wear Cross the movable platform（73）And to the movable platform（73）Mobile generation guide effect, the lead（74）End is set Limited location block（741）, first object disposing platform（71）With the movable platform（73）Between be provided with pressure-bearing spring （742）, the movable platform（73）On motor is installed（7）, the motor（7）Output end and the belt wheel（63）Pass through belt （72）It is connected and realizes V belt translation, first object disposing platform（71）Middle part is fixedly installed nut（711）, the nut （711）Screw thread is connected with adjusting screw rod（75）, the adjusting screw rod（75）Upper end, which is provided with, heads on the movable platform （73）Bearing plate（751）, the adjusting screw rod（75）Bottom is provided with handle（752）, the belt wheel（63）Including first Belt wheel（631）, the second belt wheel（632）With the 3rd belt wheel（633）, first belt wheel（631）, second belt wheel（632）With 3rd belt wheel（633）Belt can be passed through（72）With the motor（7）Output end be connected, the motor（7）Output End is in same time and first belt wheel（631）, second belt wheel（632）Or the 3rd belt wheel（633）It is unique One belt wheel is connected, the electric field dedusting area（41）Including some collecting polar plates, the collecting polar plate is arranged at support frame（4） On, support frame as described above（4）It is installed on body（1）On the mounting groove of inwall, the support support is provided with the mounting groove Frame（4）Spring, the body（1）Top is provided with gas collection portion（61）, the gas collection portion（61）It is connected with the escape pipe（6） So as to by body（1）Gas after interior dedusting transfers out body（1）, the body（1）Bottom is provided with ash bucket, the ash Bucket is provided with sewage draining exit（12）And pass through the sewage draining exit（12）And sedimentation basin（11）It is connected.