CN111351062A

CN111351062A - Dust suction device for boiler

Info

Publication number: CN111351062A
Application number: CN202010176788.7A
Authority: CN
Inventors: 程荟瑜; 蒋芸鸿
Original assignee: Chongqing Devo Wood Products Processing Co ltd
Current assignee: Chongqing Devo Wood Products Processing Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-06-30
Anticipated expiration: 2040-03-13
Also published as: CN111351062B

Abstract

The invention relates to the technical field of dust purification, and particularly discloses a dust collection device for a boiler, which comprises a rack, wherein a box body is fixedly connected to the rack, an air outlet is formed in the box body, a cloth bag is fixedly connected to the inside of the box body, an ash bucket is communicated to the lower portion of the box body, an air inlet is formed in the ash bucket, the number of the air inlets is an odd number larger than 1, the air inlets are distributed on the inner wall of the ash bucket in a circular array, a cooling mechanism and a fire extinguishing mechanism are arranged on the rack, the cooling mechanism comprises a cooling cylinder communicated with the air inlet, a cooling channel and a cavity surrounding the cooling channel are formed in the cooling cylinder, a water inlet and a water outlet are formed in the cavity, the fire extinguishing mechanism comprises a fire extinguishing cylinder, the fire extinguishing cylinder is respectively communicated. This scheme is used for solving among the prior art sack cleaner and causes the poor problem of dust removal effect because of dusty gas temperature is too high.

Description

Dust suction device for boiler

Technical Field

The invention relates to the technical field of dust purification, in particular to a dust collection device for a boiler.

Background

At present, the boiler can adopt the sack cleaner to remove dust in the use usually, and its theory of operation is that after dusty gas got into the sack cleaner, the dust that the granule is big, proportion is big falls into the ash bucket because the effect of gravity subsides, and the gas that contains more tiny dust filters when passing through the sack, makes the dust detained, and gas obtains purifying. However, the temperature of the dust-containing gas just coming out of the boiler is generally very high, some of the dust-containing gas even has sparks, so that certain damage is easily caused to the cloth bag, even the cloth bag is ignited, the filtering precision of the cloth bag is reduced, the service life is shortened, the dust removal effect is poor, the gas with dust is discharged into the atmosphere, and the environment is polluted.

Disclosure of Invention

The invention aims to provide a dust collection device for a boiler, and aims to solve the problem that a bag-type dust collector in the prior art is poor in dust collection effect due to overhigh temperature of dust-containing gas.

In order to achieve the above object, the basic scheme of the invention is as follows:

the utility model provides a boiler dust extraction, which comprises a frame, the rigid coupling has the box in the frame, it has the gas vent to open on the box, the rigid coupling has the sack in the box, box below intercommunication has the ash bucket, be equipped with the air inlet on the ash bucket, the quantity of air inlet is for being greater than the odd number of one, the air inlet is circular array distribution on the ash bucket inner wall, be equipped with cooling mechanism and fire extinguishing mechanism in the frame, cooling mechanism includes the cooling section of thick bamboo with the air inlet intercommunication, the inside cavity that has the cooling passageway and surrounds around the cooling passageway of opening of cooling section of thick bamboo, it has water inlet and delivery port to open on the cavity, fire extinguishing mechanism includes the section of thick bamboo that goes out, the section of thick bamboo that goes out fires respectively.

The technical principle of the invention is as follows: before entering the device, the dusty gas firstly enters the cooling channel and is cooled by utilizing the flowing water in the cavity, so that the temperature of the dusty gas is reduced, and the overhigh temperature is avoided. Then enters the fire extinguishing cylinder, and the fire extinguishing agent is sprayed by the spray pipe to extinguish the fire, so that the cloth bag is prevented from being damaged by the residual sparks. The treated dust-containing gas enters the ash bucket through the gas inlet, the dust with larger particles falls on the ash bucket through sedimentation, the dust with smaller particles is blocked by the cloth bag along with the gas, and finally the filtered gas is discharged through the gas outlet.

Compare the beneficial effect in prior art:

1. set up a plurality of air inlets to adopt the air inlet to be the mode that circular array distributes, make gaseous through the air inlet get into behind the ash bucket, can collide with the ash bucket inner wall, make the dust of big granule subside fast, can make gaseous entering evenly disperse behind the ash bucket moreover, then evenly ground sack filters, compares with the setting of single air inlet, can make sack evenly filtered, utilizes the sack effectively, improves its filter effect. And the design of odd number of air inlets is adopted, so that a plurality of strands of gas entering the ash bucket can meet at the center, and a part of gas rises to the cloth bag at the center of the box body for filtering; after the other part of gas contacts the inner wall of the ash bucket on the opposite side, large particle dust is settled, and small particle dust rises along with the gas and is filtered through the cloth bag far away from the center, so that the utilization rate of the cloth bag is improved, and the filtering effect is improved.

2. The temperature reduction mechanism is arranged, so that the gas entering the ash bucket is reduced in advance by the temperature reduction mechanism, the cloth bag is prevented from being damaged due to overhigh temperature of the gas, and meanwhile, the temperature of the gas can not reach a burning point by the temperature reduction mode by the temperature reduction mechanism, so that a certain fire extinguishing effect is achieved; set up the cavity, utilize the cooling of flowing water, the effect is better, and gas and flowing water carry out the heat exchange through contactless ground moreover, can not cause the pollution to flowing water, and the flowing water that is heated after the cooling can be done and use in addition, realizes used heat utilization.

3. The fire extinguishing mechanism is arranged, the fire extinguishing mechanism is used for extinguishing the cooled gas, the cloth bag is prevented from being damaged by residual sparks, the effect of double insurance is achieved, and therefore the service life of the cloth bag is prolonged.

4. According to the invention, through the processing sequence of firstly cooling, then extinguishing fire and then removing dust, the damage to the cloth bag is reduced, the cloth bag is prevented from being damaged or ignited due to high temperature, the filtering effect is improved, and the dust removing effect is improved.

Further, the cooling mechanism further comprises a spray head arranged in the box body, the spray head is located below the cloth bag, a water tank is fixedly connected to the box body, and a guide pipe is communicated between the water tank and the spray head. The water tank supplies water to the spray head, the spray head sprays water, and gas entering the box body is cooled for the second time, so that the gas temperature is guaranteed, and the cloth bag is prevented from being damaged.

Further, a first filter screen and a second filter screen are fixedly connected in the box body, the cloth bag is located between the first filter screen and the second filter screen, and the aperture of the first filter screen is larger than that of the second filter screen. The dust-containing gas is firstly primarily filtered through the first filter screen, then is filtered through the cloth bag, and finally is secondarily filtered through the second filter screen before being discharged, so that the discharged gas is ensured to be dry and clean. Through setting up first filter screen and second filter screen, filter respectively around the sack, alleviateed the filter pressure of sack on the one hand, can prolong the life of sack, on the other hand can reach better filter effect, environmental protection more to gas through cubic filtration.

Further, the first filter screen is coated with a fire extinguishing material. So as to avoid residual sparks in the dust-containing gas, thereby effectively achieving the purpose of extinguishing fire and preventing the cloth bag from being damaged.

Furthermore, a water guide pipe is communicated between the water tank and the water outlet, and a three-way valve is arranged on the water guide pipe. The water after being cooled in the cooling cylinder can enter the water tank through the three-way valve to be stored so as to be convenient for subsequent spraying and use, and the effect of saving water resources is achieved.

Further, the cooling channel is in a curve shape. The travel of the dusty gas in the cooling cylinder is increased, so that the cooling time is prolonged, and a better cooling effect is achieved.

Further, a hollow ball is placed in the cavity. When water enters the cavity through the water inlet to be cooled, the flowing water generates acting force on the hollow ball, so that the hollow ball moves in the cavity, the stirring effect is achieved, the positions of the water close to the cooling channel and the water far away from the cooling channel can be exchanged, and the cooling effect is improved; the hollow design can better supply water to flow through, and avoids the occurrence of blockage.

Further, the hollow-out ball is elastic. The elastic arrangement makes the motion of fretwork ball can be more active, utilizes its elasticity promptly, makes it can reach the effect of bounce-back after the collision.

Furthermore, a one-way valve which is communicated with the box body in one way is arranged on the guide pipe. So as to prevent the dust-containing gas from entering the spray pipe or the water tank through the spray head to cause blockage.

Furthermore, the air inlet is arranged along the inner wall of the ash bucket in a downward inclination mode. The entering gas can collide with the inner wall of the ash hopper as much as possible, so that the dust is settled as much as possible, and the dust removal effect is improved.

Drawings

Fig. 1 is a schematic front view partially in cross section according to a first embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a top view of the ash hopper and the air inlet according to the first embodiment of the present invention;

FIG. 4 is a schematic partial cross-sectional front view illustrating a second embodiment of the present invention;

fig. 5 is a schematic partial cross-sectional front view according to a third embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a frame 1, a box body 2, an exhaust port 3, a cloth bag 4, an ash bucket 5, a dust exhaust port 6, a valve 7, an air inlet 8, a cooling cylinder 9, a cooling channel 10, a cavity 11, a hollow ball 12, a water inlet 13, a water outlet 14, a fire extinguishing cylinder 15, a spray pipe 16, a spray head 17, a water tank 18, a water guide pipe 19, a three-way valve 20, a first filter screen 21, a second filter screen 22 and a temperature sensor 23.

Embodiment one is substantially as shown in figures 1 to 3:

the utility model provides a boiler dust extraction, which comprises a frame 1, there is box 2 through the bolt rigid coupling in the frame 1, it has gas vent 3 to open on the box 2, the rigid coupling has sack 4 in the box 2, box 2 below intercommunication has ash bucket 5, open 5 bottoms in ash bucket have dust exhaust mouth 6, install valve 7 on the dust exhaust mouth 6, it has the air inlet 8 along 5 inner wall downward slopping of ash bucket to open on the 5 lateral walls of ash bucket, the quantity of air inlet 8 is for being greater than the odd number of one, air inlet 8 is circular array distribution on 5 inner walls of ash bucket, in this embodiment, the quantity of air inlet 8 is three.

Be equipped with cooling mechanism and fire extinguishing mechanism on frame 1, cooling mechanism includes a cooling section of thick bamboo 9 with 8 intercommunications of air inlet, and cooling section of thick bamboo 9 is inside to be opened has cooling passageway 10 and surrounds cavity 11 around cooling passageway 10, and cooling passageway 10 is curvilinear figure setting such as wave or snakelike, and in this embodiment, cooling passageway 10 is the wave. A plurality of elastic hollow balls 12 are placed in the cavity 11 to stir water flow in the cavity 11, so as to improve the cooling effect, a water inlet 13 and a water outlet 14 are formed in the cavity 11, and the direction of arrows in the figure indicates the direction of the water flow. The fire extinguishing mechanism comprises a fire extinguishing cylinder 15 and a box body (not shown in the figure) filled with fire extinguishing agents, the fire extinguishing cylinder 15 is respectively communicated with the cooling cylinder 9 and the air inlet 8, a spray pipe 16 used for spraying the fire extinguishing agents is installed in the fire extinguishing cylinder 15, a high-pressure pipe is communicated between the box body and the spray pipe 16, and a high-pressure pump is communicated between the box body and the spray pipe 16.

During specific implementation, before the dusty gas enters the device, the dusty gas enters the cooling channel 10, water is supplied to the water inlet 13 and discharged from the water outlet 14, so that flowing water is formed in the cavity 11, and when the gas passes through the cooling channel 10, the gas is cooled, so that the temperature of the gas is reduced, and overhigh temperature is avoided. Then the gas enters the fire extinguishing cylinder 15 again, the high-pressure pump is started, the fire extinguishing agent in the box body is introduced into the high-pressure pipe, and then the fire extinguishing agent is sprayed into the fire extinguishing cylinder 15 through the spray pipe 16 to extinguish the fire of the gas, so that the cloth bag 4 is prevented from being damaged by the residual sparks. The dust-containing gas after the temperature reduction and fire extinguishing treatment enters the dust hopper 5 through the air inlet 8 and collides with the inner wall of the dust hopper 5, the dust with larger particles rapidly settles on the dust hopper 5, when the dust in the dust hopper 5 needs to be cleaned, the valve 7 is opened, the dust in the dust hopper 5 can be discharged, the dust with smaller particles is blocked by the filtering of the cloth bag 4 along with the gas, and finally the filtered gas is discharged through the exhaust port 3.

The second embodiment is substantially as shown in figure 4:

the difference between this embodiment and the first embodiment is: the cooling mechanism further comprises a plurality of spray heads 17 arranged in the box body 2, the spray heads 17 are located below the cloth bags 4 and distributed on the side wall of the box body 2 in a circular array mode, a water tank 18 is fixedly connected to the box body 2, a guide pipe is communicated between the water tank 18 and the spray heads 17, a one-way valve conducting to the box body 2 in a one-way mode is installed on the guide pipe, a water pump is installed in the water tank 18, water in the water tank 18 can be pumped into the guide pipe, and the water is sprayed out from the spray heads 17. A water guide pipe 19 is communicated between the water tank 18 and the water outlet 14, and a three-way valve 20 is arranged on the water guide pipe 19. A first filter screen 21 and a second filter screen 22 are fixedly connected in the box body 2 through bolts, the cloth bag 4 is positioned between the first filter screen 21 and the second filter screen 22, the aperture of the first filter screen 21 is larger than that of the second filter screen 22, and fire extinguishing materials are coated on the first filter screen 21.

During specific implementation, the water pump is started, water in the water tank 18 is pumped into the water guide pipe 19, water is sprayed out from the spray head 17, the spray head 17 is distributed in a circular array mode, water can be uniformly sprayed to the center of the box body 2, the trend of in-process water is similar to a parabola, secondary cooling can be conducted on gas entering the box body 2, gas temperature is guaranteed to be appropriate, and damage to the cloth bag 4 is avoided. Meanwhile, in the spraying process, dust which is not settled on the ash bucket 5 in the gas can be settled, so that the filtering pressure of the cloth bag 4 is reduced, and the service life of the cloth bag 4 is prolonged. The water in the water tank 18 can be supplied from the outside, and the water flowing out of the cavity 11 can be guided in through the three-way valve 20 and the water guide pipe 19, so that the flowing water is reused, and the effect of saving water resources is achieved.

The dusty gas after spraying is firstly primarily filtered through the first filter screen 21 before contacting the cloth bag 4, and the fire extinguishing material on the first filter screen 21 can secondarily extinguish fire for the gas so as to avoid the existence of residual sparks in the dusty gas. Then the gas is filtered by the cloth bag 4, and finally the gas is filtered for the second time by the second filter screen 22 before being discharged, so that the discharged gas is ensured to be clean and dry, and the effect of environmental protection is achieved.

The third embodiment is basically as shown in the attached figure 5:

the difference between this embodiment and the second embodiment is: install temperature sensor 23 on the position that is close to air inlet 8 on the ash bucket 5 lateral wall, there is the controller (not shown in the figure) through the bolt rigid coupling in the frame 1, and water pump, the even controller of temperature sensor 23 form the electricity and connect, and in this embodiment, temperature sensor 23 and controller are existing among the prior art, and this place is no longer repeated.

In specific implementation, the temperature of the gas entering the ash bucket 5 is detected through the temperature sensor 23, and when the temperature is too high, the controller controls the water pump to be started, so that the water in the water tank 18 is introduced to the spray head 17 for spraying and cooling; and when the temperature is not high, the water pump is not started. The range of this temperature is confirmed according to practical application, can automatic monitoring through setting up temperature sensor 23 and controller, needn't all spray at every turn, reduces the energy consumption on the one hand, reduces extravagantly, and on the other hand reduces the process.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a boiler dust extraction, includes the frame, and the rigid coupling has the box in the frame, and it has the gas vent to open on the box, and the rigid coupling has the sack in the box, and box below intercommunication has the ash bucket, is equipped with air inlet, its characterized in that on the ash bucket: the quantity of air inlet is for being greater than the odd number of one, and the air inlet is circular array distribution on the ash bucket inner wall, is equipped with cooling mechanism and fire extinguishing mechanism in the frame, and cooling mechanism includes the cooling section of thick bamboo with the air inlet intercommunication, and inside the opening of cooling section of thick bamboo has the cooling passageway and surrounds the cavity around the cooling passageway, and it has water inlet and delivery port to open on the cavity, and fire extinguishing mechanism includes the section of thick bamboo that goes out a fire, goes out a fire section of thick bamboo respectively with a cooling section of thick bamboo, air inlet intercommunication, is equipped with the spray tube that is.

2. The boiler suction device according to claim 1, wherein: the cooling mechanism further comprises a spray head arranged in the box body, the spray head is located below the cloth bag, the box body is fixedly connected with a water tank, and a guide pipe is communicated between the water tank and the spray head.

3. The boiler suction device according to claim 2, wherein: a first filter screen and a second filter screen are fixedly connected in the box body, the cloth bag is positioned between the first filter screen and the second filter screen, and the aperture of the first filter screen is larger than that of the second filter screen.

4. A boiler suction device according to claim 3, characterized in that: the first filter screen is coated with a fire extinguishing material.

5. The boiler suction device according to claim 2, wherein: a water guide pipe is communicated between the water tank and the water outlet, and a three-way valve is arranged on the water guide pipe.

6. The boiler suction device according to claim 1, wherein: the cooling channel is in a curve shape.

7. The boiler suction device according to claim 1, wherein: hollow balls are placed in the cavities.

8. The boiler suction device according to claim 7, wherein: the hollow-out ball is elastic.

9. The boiler suction device according to claim 2, wherein: the guide pipe is provided with a one-way valve which is communicated with the box body in one way.

10. The boiler suction device according to any one of claims 1 to 9, wherein: the air inlet is arranged along the inner wall of the ash bucket in a downward inclined mode.