CN211636952U - Dust hopper device of dust removing equipment - Google Patents

Abstract

The utility model discloses an ash bucket device of dust removing equipment, which is characterized by comprising an ash bucket, a manual gate valve, a dome valve, an ash chute, a branch pipe and a control valve; the dust hopper is provided with a hopper top and a hopper bottom, the hopper top is connected with the main body of the dust removing equipment, and dust obtained from the main body of the dust removing equipment is collected; the hopper bottom is sequentially connected with a manual gate valve, an electric gate valve, a dome valve and an ash groove from top to bottom to form an ash conveying channel; the branch pipe is connected to the side surface of the bucket bottom and is positioned above the manual gate valve; the branch pipe is a communicating pipe and is communicated with the interior of the ash hopper and the external environment; the branch pipe is provided with a control valve to control the flux of the branch pipe. This neotype ash bucket device utilizes the negative pressure that forms in the dust collecting equipment inner space, makes the outside air automatic through the branch pipe at the inside updraft that forms of ash bucket, prevents that the dust that contains water from falling ash bucket surface and taking place to harden, is showing the clearance maintenance frequency that has reduced the ash bucket.

Description

Dust hopper device of dust removing equipment

Technical Field

The utility model relates to a dust collecting equipment field especially relates to a dust collecting equipment's ash bucket device.

Background

In the field of steel smelting, sintering flue gas generated by sintering equipment in a sintering process contains a large amount of dust particles, and along with the increasing environmental protection requirement, dust removal equipment is required to be used for removing dust, desulfurizing and denitrifying on the sintering flue gas so as to meet the requirement of environmental protection. Usually, an electric dust removal device is adopted in the sintering process, so that the sintering flue gas can be well removed. After the dust removing equipment is used for a period of time, a hardened or bonded dust caking layer is often found to be formed on the side wall of the dust hopper, the dust is caked to a certain degree, the dust remover is abnormal in operation, and a large amount of manpower and material resources are needed for treatment. Therefore, a device capable of effectively preventing the ash accumulation on the ash bucket from hardening is needed to reduce the workload of equipment maintenance and ensure the stable operation of the electric dust removal device.

SUMMERY OF THE UTILITY MODEL

The utility model provides an ash bucket device of dust collecting equipment to solve or the part solves the easy deposition of current ash bucket and hardens, cause the big technical problem of plant maintenance work load.

In order to solve the technical problem, the utility model provides an ash bucket device of dust removing equipment, which comprises an ash bucket, a manual gate valve, an electric plug valve, a dome valve, an ash chute, a branch pipe and a control valve;

the dust hopper is provided with a hopper top and a hopper bottom, the hopper top is connected with the main body of the dust removing equipment, and dust obtained from the main body of the dust removing equipment is collected; the hopper bottom is sequentially connected with a manual gate valve, an electric gate valve, a dome valve and an ash groove from top to bottom to form an ash conveying channel;

the branch pipe is connected to the side surface of the bucket bottom and is positioned above the manual gate valve; the branch pipe is a communicating pipe and is communicated with the interior of the ash hopper and the external environment;

the branch pipe is provided with a control valve to control the flux of the branch pipe.

Optionally, the branch pipe is made of steel or aluminum.

Optionally, the pipe diameter of the branch pipe is: 20 mm-30 mm.

Optionally, the vertical height of one end of the branch pipe in the external environment is lower than that of the other end of the branch pipe communicated with the interior of the ash bucket.

Further, the distance between the other end of the branch pipe communicated with the interior of the ash bucket and the manual gate valve is less than or equal to 5 mm.

According to the technical scheme, the number of the branch pipes is more than two, and the heights of the positions where the branch pipes are connected with the ash bucket are consistent.

Optionally, the ash bucket device further comprises an electrical control system connected with the control valve to remotely control the opening, closing and flow limiting of the control valve.

The utility model also provides a dust collecting equipment, including an arbitrary ash bucket device in the above-mentioned scheme.

Through the utility model discloses an one or more technical scheme, the utility model has following beneficial effect or advantage:

the utility model provides an ash bucket device sets up the branch pipe of intercommunication ash bucket inside and external environment through the top at the end of the fill of ash bucket, manual push-pull valve to dispose the flux of control valve in order to adjust the branch pipe on the branch pipe. In the treatment stage of the dust which is generated by the dust removing equipment after the sintering unit is just started and has low temperature and high water content, the control valve is opened, the manual gate valve is closed, the negative pressure formed by the air draft system in the inner space of the dust removing equipment is utilized, so that the outside air automatically forms an updraft in the dust hopper through the branch pipe, the moisture-containing dust is prevented from falling to the surface of the dust hopper to be hardened, the cleaning and maintenance frequency of the dust hopper is obviously reduced, the maintenance workload of the dust conveying system of the dust removing equipment is reduced, and the normal smooth and stable operation of the dust removing equipment is ensured.

Drawings

Fig. 1 is a structural diagram of an ash bucket device of a dust removing device provided by an embodiment of the present invention;

description of reference numerals:

1. an ash hopper; 2. a manual gate valve; 3. an electric gate valve; 4. a dome valve; 5. an ash tank; 6. a control valve; 7. and (4) branch pipes.

Detailed Description

In order to make the technical personnel in the technical field of the present invention understand the present invention more clearly, the following description is made in detail for the technical solution of the present invention through the specific embodiments with reference to the attached drawings.

At present, electric dust removal equipment is widely used in the sintering process, and the electric dust removal equipment separates dust and gas in dust-containing flue gas by utilizing coulomb force generated by a high-voltage electric field to remove dust. The electric dust-removing equipment is equipped with several rows of metal dust-collecting electrodes (anodes) and corona electrodes (cathodes), between two electrodes a high-voltage direct current is applied to make air be ionized so as to produce lots of negative ions, positive ions and free electrons which can be moved at high speed. The electric dust removing equipment is usually provided with an air draft system, and dust-containing flue gas is continuously pumped to the electric dust removing equipment from a sintering machine for dust removal. When the dust-containing flue gas passes through the electric field space, the dust collides with negative ions, positive ions and free electrons to be charged, and the dust is deposited on the dust collecting electrode and the corona electrode under the action of the electric field. When the dust is accumulated to a certain degree, the dust on the electrodes is knocked down to a dust hopper below by a rapping mechanism, and the dust is collected by the dust hopper and discharged into a dust tank.

The temperature of sintering flue gas generated in a normal sintering process is usually over 100 ℃, but when sintering equipment is overhauled or production is started again after long-time fault treatment is finished, flue gas with low temperature (about 70-80 ℃) and high water content can be generated, the surface temperature of an ash bucket is low, water vapor in the flue gas is easy to condense on the ash bucket, wet ash and dust are bonded on the surface of the ash bucket and start to agglomerate, and the more serious bonding is along with the increase of time, the machine is stopped for cleaning.

At present, electric dust removal equipment generally needs to clean the surface of hardened dust accumulated in an ash bucket about one month, an electric dust removal device is closed at the moment, the ash bucket is disassembled from hardened blocks on the surface of the ash bucket, the whole cleaning process consumes time and labor, a normal sintering process is influenced, dust on an ash removal site is easy to fly away all around, and the environment is seriously damaged. In order to solve the problem of ash accumulation and hardening of the ash bucket, firstly, considering the factor that the moisture content of hardened dust is higher, a heating device is arranged outside the ash bucket, and the purpose is to improve the temperature of smoke dust near the ash bucket by heating the ash bucket so as to reduce the moisture content of the smoke dust deposited on the ash bucket. Under the not as anticipated condition of effect that hardens of dust is eliminated through near the smoke and dust of heating ash bucket, the utility model discloses from another kind of angle, when the sintering unit just started, make it not descend as far as possible or descend at the ash bucket surface less from the great smoke and dust of control humidity, fundamentally avoids the higher dust of humidity to harden on the ash bucket, and the concrete scheme is as follows:

in an alternative embodiment, referring to fig. 1, there is provided an ash hopper device comprising an ash hopper 1, a manual gate valve 2, an electric gate valve 3, a dome valve 4, an ash chute 5, a branch pipe 7 and a control valve 6;

the dust hopper 1 is provided with a hopper top and a hopper bottom, the hopper top is connected with the main body of the dust removing equipment, and dust obtained from the main body of the dust removing equipment is collected; the hopper bottom is sequentially connected with a manual gate valve 2, an electric gate valve 3, a dome valve 4 and an ash chute 5 from top to bottom to form an ash conveying channel;

the branch pipe 7 is connected to the side surface of the bucket bottom 1 and is positioned above the manual gate valve 2; the branch pipe 7 is a communicating pipe and is communicated with the interior of the ash hopper 1 and the external environment;

the branch pipe 7 is provided with a control valve 6 to control the flux of the branch pipe 7.

Specifically, ash bucket 1 among the dust collecting equipment is the dust similar to the funnel shape and gathers the mechanism, and the main part of electrostatic precipitator is connected on the fill top of funnel to collect the dust that shakes off from the electrode, then during the dust passes through the defeated ash passageway entering dust collection groove 5 of dust at the bottom of the bucket, the dust falls into the in-process in ash groove 5 from ash bucket 1 and passes through manual push-pull valve 2, electronic push-pull valve 3 and dome valve 4 in proper order. The manual gate valve 2 is arranged on the bottom of the ash bucket 1, plays a role in manually opening and manually isolating the ash conveying channel, can manually control the opening and closing of the ash conveying channel when the electric dust removal equipment is overhauled, and is in an opening state when the electric dust removal equipment works normally. The electric gate valve 3 is a gate valve which is controlled by an electric system of the dust removing equipment and opens or cuts off the ash conveying channel, the dome valve 4 is also called a system valve and is a valve which is specially used for controlling dust to enter the ash chute 5 on the ash bucket device, and the dome valve 4 is periodically opened and closed through the control system of the electric dust removing equipment to discharge the accumulated dust to the ash chute 5. The ash bucket 1, the manual gate valve 2, the dome valve 4 and the ash chute 5 form an ash conveying system of the electric dust removing equipment together.

This embodiment sets up in branch pipe 7 that the external environment communicates naturally at the end of the hopper of ash bucket 1, utilize exhaust system during operation to produce certain negative pressure in whole dust collecting equipment's space (about 17kPa ~ 18.5kPa when handling normal temperature flue gas, about 6kPa when the great low temperature flue gas of processing water content when the sintering unit just starts the machine), the outside air will get into ash bucket 1 bottom and upwards flow through branch pipe 7 is automatic under the effect of negative pressure, get into the dust collecting equipment main part, thereby an ascending air current has been formed, "hold" the great flue gas of water content, make it not descend to harden on the internal surface of ash bucket 1.

The working process of the ash bucket device and the principle of preventing the ash bucket from hardening in the embodiment are described as follows: when the sintering unit is started after being overhauled, a large amount of low-temperature smoke with large water content is generated, one part of the smoke is sucked into subsequent desulfurization and denitrification equipment through a dedusting electric field under the action of an air draft system, the other part of the smoke is retained in the space at the ash bucket 1, and the dust of the part of the smoke is possibly deposited on the surface of the ash bucket 1 to cause hardening. The manual gate valve 2 is in the open state when dust collecting equipment normally works, but in order to realize the purpose that the wet dust is controlled not to fall to the surface of the ash bucket in this embodiment, the manual gate valve 2 is closed before the sintering unit is started, at the moment, the electric gate valve 3, the dome valve 4 and the ash chute 5 stop working, the control valve 6 on the branch pipe 7 is opened, then, in a first preset time period when low-temperature and high-water-content flue gas generated after the sintering unit is started enters the dust collecting equipment, the outside air automatically enters the branch pipe 7 under the action of negative pressure and flows to the main body of the dust collecting equipment above the ash bucket 1. Because the air draft system forms relatively obvious negative pressure (the negative pressure is about 6kPa at this moment) in the inner space of dust collecting equipment, therefore the outside air current that automatic entering has sufficient ability will be located the dust hopper space and probably fall on dust collecting motor department to the dirty flue gas of dust that hardens on dust hopper 1 surface to the dust deposit that has avoided the low temperature moisture content to be big is on dust hopper 1. At the second preset time quantum after sintering set start-up a period, the flue gas resumes to normal state, and flue gas temperature is higher (more than 150 ℃) this moment, and the water content is very low, just can close the control valve 6 on the branch pipe 7, opens manual push-pull valve 2 simultaneously, and electric push-pull valve 3, dome valve 4 and ash chute 5 normal work this moment, and electrostatic precipitator normally operates according to original mode. The control valve 6 on the branch pipe 7 can use a ball valve, the branch pipe 7 can be opened or closed, and the flow of the branch pipe 7 can be adjusted. This ash bucket device in novel forms updraft in through the negative pressure that naturally forms among the utilizing dust collecting equipment, and the branch pipe 7 that uses the intercommunication forms updraft in with external air drainage to ash bucket 1, and the effectual wet dust deposit that has prevented takes place to harden at 1 internal surface of ash bucket, and is little to the transformation work load of ash bucket device, does not need additionally to increase the air supply. After the ash bucket device in the embodiment is applied, the ash bucket device basically does not need to be subjected to ash removal maintenance, and compared with the method that the ash bucket device is required to be subjected to one-time ash bucket cleaning one month before the ash bucket device is applied, the method greatly saves the equipment maintenance work and ensures the stable operation of a sintering unit.

The time period for opening the branch pipe 7 to prevent the wet dust from hardening on the ash hopper 1 is determined by the start time of the sintering unit and the temperature of the sintering flue gas. Usually, the temperature of flue gas generated when a sintering unit is just started is about 50-130 ℃, the duration is about 2-3 hours, at the moment, dust contains more moisture, and when the flue gas passes through a dust removal device, a control valve 6 on a branch pipe 7 needs to be opened to introduce external airflow so as to prevent the flue gas from falling into the surface of an ash bucket 1 to cause hardening. When the sintering unit normally works, namely the temperature of the flue gas after the sintering unit is started is above 150 ℃ and lasts for at least 4 hours, the moisture content in the sintering flue gas is low, the flue gas is not easy to harden on the surface of the ash bucket 1, the control valve on the branch pipe can be closed, the manual gate valve 2 is opened, and the electric gate valve 3, the dome valve 4 and the ash chute 5 normally work. Therefore, the time period of opening the branch pipe 7 is the time interval after the sintering unit is started and before the flue gas temperature lasts for 4 hours and exceeds 150 ℃.

In some optional embodiments, the branch pipe 7 may be made of steel or aluminum, the branch pipe 7 made of metal with certain strength may ensure that the branch pipe 7 may not deform when external airflow enters the ash bucket under a negative pressure of about 6kPa to 19kPa inside the equipment, and the metal pipe and the bottom of the ash bucket 1 may be connected together by full welding to ensure airtightness of the connection.

Optionally, the pipe diameters of the branch pipes 7 are: 20 mm-30 mm. The pipe diameter of the branch pipe 7 communicated with the outside cannot be too small, otherwise, enough ascending airflow cannot be generated, and the pipe diameter of the branch pipe 7 cannot be too large in the same way, so that the entering airflow is too much, and the connection stability of the hopper bottom is reduced. Tests show that the pipe diameter of the branch pipe 7 can be 20 mm-30 mm, and preferably a sextant pipe (the pipe diameter is about 20mm) or a pipe with the pipe diameter of about 25mm in the general specifications on the market can well meet the requirements.

In other alternative embodiments, the vertical height of the branch pipe 7 at one end of the external environment is lower than that of the other end of the branch pipe 7 which is communicated with the interior of the ash hopper 1. I.e. the branch pipes 7 are inclined downwards. Optionally, the distance from the other end of the branch pipe 7 communicated with the interior of the ash bucket 1 to the manual gate valve 2 is less than or equal to 5 mm. The downward inclined branch pipe 7 can discharge accumulated water in the ash bucket 1 during low-temperature smoke treatment with high water content, and reduce the water amount flowing into the ash tank 5. The accumulated water is generated by condensing water vapor in low-temperature smoke dust on the surface of the ash bucket 1 with the temperature lower than the dew point and converging the water vapor to the bottom of the ash bucket 1. The "low-temperature" flue gas is relative to the normal temperature of the flue gas, actually, the "low-temperature" flue gas usually has 50-130 ℃, and part of water in dust is converted into water vapor and then condensed on the inner surface of the ash bucket 1. In the embodiment of the application, when the dust removing equipment is used for treating low-temperature flue gas, the manual gate valve 2 is in a closed state, water condensed from the ash bucket 1 flows into the bucket bottom and is accumulated in a pipeline at the manual gate valve 2, and the accumulated water can be discharged through the inclined branch pipe 7 under the action of gravity even if external air flow enters the branch pipe 7. At the low temperature flue gas dust removal stage of the just start-up of sintering unit, the water yield of condensing at ash bucket 1 internal surface is more considerable, can discharge most ponding through branch pipe 7 to avoid when normally removing dust, too much ponding flows into ash chute 5 in the manual gate valve 2 opens the back, causes the interior dust of ash chute 5 to harden, consequently the branch pipe 7 will be within 5mm apart from the vertical height of manual gate valve 2, in order to avoid the too much unable discharge of ponding.

In other alternative embodiments, the number of the branch pipes 7 is more than two, and the heights of the positions where the more than two branch pipes 7 are connected with the ash bucket 1 are consistent, and the branch pipes can be arranged in a central symmetry manner. Thus, not only the drainage effect can be improved, but also more uniform ascending air flow can be formed in the ash bucket 1, and the wet dust is further prevented from falling to the surface of the ash bucket 1.

In some optional embodiments, the ash bucket device further comprises an electrical control system connected with the control valve 6 to remotely control the opening, closing and flow limiting of the control valve 6, so that the remote control by an operator is more convenient.

The utility model also provides a dust collecting equipment, a serial communication port, include like any one ash bucket device in above-mentioned embodiment. Dust collecting equipment is not limited to electrostatic precipitator, filtration formula dust collecting equipment, as long as be equipped with exhaust system, can be at the inside certain negative pressure that forms of dust collecting equipment, all can use the utility model discloses in the ash bucket device that provides, effectively avoid wet dust to harden into pieces on ash bucket 1.

Through the utility model discloses an one or more technical scheme, the utility model has following beneficial effect or advantage:

the utility model provides an ash bucket device sets up the branch pipe of intercommunication ash bucket inside and external environment through the top at the end of the fill of ash bucket, manual push-pull valve to dispose the flux of control valve in order to adjust the branch pipe on the branch pipe. In the treatment stage of the dust which is generated by the dust removing equipment after the sintering unit is just started and has low temperature and high water content, the control valve is opened, the manual gate valve is closed, the negative pressure formed by the air draft system in the inner space of the dust removing equipment is utilized, so that the outside air automatically forms an updraft in the dust hopper through the branch pipe, the moisture-containing dust is prevented from falling to the surface of the dust hopper to be hardened, the cleaning and maintenance frequency of the dust hopper is obviously reduced, the maintenance workload of the dust conveying system of the dust removing equipment is reduced, and the normal smooth and stable operation of the dust removing equipment is ensured.

On the other hand, when treating soot with a high water content, the water vapor in the soot inevitably condenses into water in the ash bucket, and the water flows into the bottom of the ash bucket and accumulates in the closed manual gate valve. The accumulated water can be discharged through the downward-inclined branch pipes, so that the phenomenon that a large amount of accumulated water flows into the ash tank to cause the hardening of dust stored in the ash tank is avoided, and the maintenance of an ash conveying system of the dust removing equipment is further reduced.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (8)

1. An ash bucket device of dust removing equipment is characterized by comprising an ash bucket, a manual gate valve, an electric gate valve, a dome valve, an ash chute, a branch pipe and a control valve;

the dust hopper is provided with a hopper top and a hopper bottom, the hopper top is connected with the main body of the dust removing equipment, and dust obtained from the main body of the dust removing equipment is collected; the hopper bottom is sequentially connected with the manual gate valve, the electric gate valve, the dome valve and the ash chute from top to bottom to form an ash conveying channel;

the branch pipe is connected to the side face of the hopper bottom and is positioned above the manual gate valve; the branch pipe is a communicating pipe and is communicated with the interior of the ash hopper and the external environment;

the control valve is arranged on the branch pipe to control the flux of the branch pipe.

2. The ash bucket apparatus of claim 1 wherein the branch pipe is steel or aluminum.

3. An ash bucket apparatus according to claim 1, wherein the pipe diameters of the branch pipes are: 20 mm-30 mm.

4. The ash bucket device of claim 1, wherein the vertical height of the branch pipe at one end of the external environment is lower than that of the other end of the branch pipe communicated with the interior of the ash bucket.

5. The ash bucket device as claimed in claim 4, wherein the distance from the other end of the branch pipe communicated with the interior of the ash bucket to the manual gate valve is less than or equal to 5 mm.

6. The ash bucket device of claim 1, wherein the number of the branch pipes is two or more, and the heights of the positions where the two or more branch pipes are connected with the ash bucket are consistent.

7. The ash bucket apparatus of claim 1, further comprising an electrical control system connected to the control valve to remotely control the opening, closing, and restricting of the control valve.

8. A dust removing apparatus comprising the ash hopper device according to any one of claims 1 to 7.

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