CN211025600U - Dust suppression system of electric dust removal ash bucket - Google Patents
Dust suppression system of electric dust removal ash bucket Download PDFInfo
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- CN211025600U CN211025600U CN201921844030.5U CN201921844030U CN211025600U CN 211025600 U CN211025600 U CN 211025600U CN 201921844030 U CN201921844030 U CN 201921844030U CN 211025600 U CN211025600 U CN 211025600U
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- suppression system
- water curtain
- ash bucket
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Abstract
The utility model provides an electric dust removing and dust suppressing system of an ash bucket, which comprises a dust cover, a dust collecting pipe and a water curtain nozzle; the dust cover is used for limiting a closed space so as to be suitable for arranging an ash discharge port of the electric dust removal device in the closed space; one end of the dust collection pipe is communicated with the closed space, and the other end of the dust collection pipe is connected with a negative pressure device; the water curtain nozzle is arranged on the periphery of the dust cover and used for spraying a water curtain to suppress dust.
Description
Technical Field
The utility model relates to a corollary equipment of thermal power plant, concretely relates to electric precipitation ash bucket presses down dirt system.
Background
The electric dust collector is a necessary corollary equipment of a thermal power plant, and has the function of removing particle smoke dust in the smoke discharged by a boiler, thereby greatly reducing the smoke dust amount discharged into the atmosphere, and being important environment-friendly equipment for improving environmental pollution and air quality.
When the electric dust removal dry ash system is in operation, an ash hopper or a pipeline is often blocked due to various reasons, and ash discharge operation is often carried out; when the electric dust removal equipment is overhauled, in order to carry out the internal inspection of ash bucket, the ash discharge treatment also needs to be carried out.
Can produce a large amount of raise dusts when carrying out the ash bucket and overhauing and put the ash operation, because dry ash fineness is very high, fly away with the wind very easily, conventional three proofings cloth shelters from or the water spray all hardly plays effectual dirt effect that presses down. Especially, in some thermal power plants, the electric dust removal dry ash system often needs to carry out long-time continuous ash discharge operation of an ash bucket due to the change of coal types, the occurrence of major defects of equipment, the overhaul of a unit and the like, a large amount of raised dust is generated, the peripheral environment and the safe operation of adjacent equipment are seriously influenced, and great potential safety hazards are caused to the human health of staff.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problem, the utility model provides an electric precipitation ash bucket presses down dirt system, a serial communication port, include:
a dust cover for defining an enclosed space adapted to position a dust discharge within the enclosed space;
one end of the dust collection pipe is communicated with the closed space, and the other end of the dust collection pipe is connected with a negative pressure device; and
and the water curtain nozzle is arranged on the periphery of the dust cover and used for spraying a water curtain to suppress dust.
Furthermore, the dust cover adopts three proofings cloth or canvas that meets the dust-proof requirement when putting grey operation.
Preferably, the canvas made of other high-strength materials which are not easy to tear can also be adopted.
Further, the dust cover comprises an openable and closable access opening so as to facilitate the entry and exit of an operator.
Preferably, the dust shield includes a longitudinal split to avoid the duct of the hopper; the edges of the two sides of the fork are sealed by using a sealing process, so that the strength is improved; the edges of the two sides of the fork comprise hasps or zippers made of metal or other materials and used for quickly closing the dust cover; the top of the dust cap includes a round hole or hook that can be used for quick suspension.
Further, the dust cover is set up to cooperate with electrostatic precipitator and operation place ground, has injectd jointly the enclosure space.
Furthermore, one end of the dust suction pipe extends into the closed space and is arranged at a position close to the dust discharge port.
Furthermore, a relay fan is arranged on the pipeline of the dust collection pipe to accelerate the air flow in the dust collection pipe to flow to the negative pressure device.
Further, the dust suction pipe is a flexible pipe.
Furthermore, the negative pressure device is a dust collection vehicle or a flue of an electric dust removal inlet.
Furthermore, a water pipe connected with the water curtain nozzle is also provided with a suppressant dosing pump, so that the water curtain nozzle can spray a dust suppressant.
Further, the water curtain nozzle adopts a fan-shaped nozzle and/or a conical nozzle or other nozzles with similar atomization effect.
The utility model discloses an electric precipitation ash bucket presses down dirt system has used negative pressure dust absorption, sheltered from dust cover and chemical spray dust suppression technique comprehensively. The negative pressure dust collection mode is innovatively used, and the negative pressure of the flue of the thermal power generating unit is adopted according to local conditions to realize dust absorption in the ash discharge process; a relay fan is adopted to compensate the unstable condition of the negative pressure of the flue; the special canvas dust cover is matched, so that the site construction is more convenient and faster; the adoption of the wet chemical dust suppressant further reduces the pressing and catching of escaping dust.
The dust suppression of the electric dust removal ash bucket is realized, and the electric dust removal ash bucket has important significance for improving the working environment, reducing the dust pollution and reducing the health hazard to staff. Multiple field tests show that dust emission during dust discharge can be effectively reduced completely by comprehensively using negative pressure for dust collection, strengthening shielding and increasing spraying dust suppression.
The utility model discloses an electric precipitation ash bucket presses down device among the dirt system easily makes and obtains to installation and configuration are convenient, can configure it into a dedicated, the dismouting of being convenient for and the dirt system that presses down that removes completely, can include following part: a negative pressure dust suction port or a dust suction vehicle taken from a flue, a dust suction hose, a corresponding fast-assembling interface, a small relay fan, a special canvas dust cover convenient for fast assembly and disassembly, and a water curtain wall formed by nozzles, and dust suppressant dosing equipment.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a system diagram of a preferred embodiment of the present invention;
description of reference numerals:
1-an electric dust and ash bucket, 2-an ash tank,
3-ash conveying pipe, 41-upper ash discharge port,
42-lower part ash-discharging opening 5-dust-proof cover,
51-closed space, 52-curtain,
6-dust absorption pipe, 61-dust absorption pipe inlet end,
62-outlet end of suction pipe, 7-water curtain nozzle
8-relay fan, 9-rubber hose,
10-dust suppressant dosing pump, 11-work site ground.
Detailed Description
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention. The drawings are schematic diagrams or conceptual diagrams, and the relationship between the thickness and the width of each part, the proportional relationship between the parts and the like are not completely consistent with actual values.
Fig. 1 shows the system diagram of a preferred embodiment of the present invention, which acts on the existing electric dust removing system, and fig. 1 shows the related devices in the system, including the electric dust removing ash bucket 1, the ash tank 2, and the ash conveying pipe 3 connected in sequence from top to bottom, the bottom of the electric dust removing ash bucket 1 is provided with an upper ash discharging port 41, and the bottom of the ash tank 2 is provided with a lower ash discharging port 42. When the electric dust removal dry ash system is in operation, an ash hopper or a pipeline is often blocked due to various reasons, and ash discharge operation is often carried out; when the electric dust removal equipment is overhauled, in order to carry out the internal inspection of ash bucket, the ash discharge treatment also needs to be carried out. A large amount of dust can be generated during dust discharging operation, and the dry dust is very high in fineness and easy to fly with the wind, so that the dust can greatly affect the surrounding environment and the health of workers.
The main structure of the electric dust removing and dust suppressing system of the embodiment comprises a dust cover 5, a dust collecting pipe 6 and a water curtain nozzle 7.
The dust cover 5 is used to isolate the dust-discharging opening from the outside, i.e. the upper dust-discharging opening 41 and the lower dust-discharging opening 42 are arranged in the enclosed space 51 defined by the dust cover 5. Dust cover 5's upper end is set up to be fixed on electric precipitation ash bucket 1 or its support, if use and bind, hang fixed mode such as to further seal the gap, if adopt modes such as parcel, tether, frenulum, clamp.
In other embodiments, the dust cap 5 is provided with a round hole or hook on top for quick suspension.
The bottom of the dust cover 5 contacts with the ground 11 of the work site, so that the dust cover 5 can directly drop to the ground 11 of the work site, in other embodiments, the bottom of the dust cover 5 is pressed by a placing object, such as a metal piece, a brick, a sand bag, etc., and the dust cover 5 is pressed on the ground 11 of the work site, or the dust cover 5 can be arranged into a tent-like structure as shown in fig. 1.
With the above arrangement, the dust cover 5 is fitted to the electric dust collector and the work site floor 11 to form the closed space 51. It should be noted that in practice, the enclosed space 51 does not necessarily achieve a theoretically complete seal, and in fact, it is impossible to achieve a theoretically ideal state. However, in practical applications, a technician may configure the enclosed space 51 by conventional means so that the dust cover 5 can prevent the dust from leaking out as much as possible during the dust discharging operation.
The dust cover 5 is further provided with an opening or a connector for connecting with the dust suction pipe 6, in particular for connecting with a dust suction inlet end 61 of the dust suction pipe 6, and the connection is also sealed. When the dust cover 5 is provided with an opening, the dust suction inlet 61 is placed into the opening and is fixed and sealed by using a tying rope, a tying belt, a clamping hoop, a wrapping mode and the like; when the dust cover 5 is provided with the interface, the dust suction inlet end 61 is of a matched interface structure, and the connection and the sealing can be directly realized through the matched interface. The dust suction pipe 6 is a flexible pipe.
In this embodiment, the dust cover 5 is further provided with an openable and closable curtain 52 to facilitate the operator to get in and out of the closed space 51 before and after the dust discharging operation. The curtain 52 defines a longitudinal slit that allows the duct of the hopper to be avoided. In the implementation, the edges of the two sides of the split fork are sealed by using a sealing process to improve the strength, and the edges of the two sides of the split fork also comprise hasps or zippers for quickly closing the dust cover, wherein the hasps or zippers are made of metal or other materials, such as nylon, plastic and the like.
In other embodiments, the dust suction pipe 6 is provided to be connected to the dust cover 5 from the upper portion of the curtain 52, and the dust suction pipe 6 may be restricted to the upper portion of the curtain 52 when the curtain 52 is closed.
The dust suction outlet 62 of the dust suction pipe 6 is connected to a device or equipment capable of providing negative pressure, and the opening and closing of the negative pressure are controlled by a valve, so that the raised dust generated in the closed space 51 can be sucked out through the dust suction pipe 6.
In some embodiments, the dust extraction outlet end 62 is connected to the flue of the electric dust removal inlet. In one implemented project, the flue of the electric dust removal inlet is measured to have negative pressure of about-2 KPa, and a pipeline is installed from the flue of the electric dust removal inlet and is specially used for the negative pressure dust collection test of the electric dust removal hopper. The anemometer is used for measuring the wind speed of the negative pressure pipeline, and the average through flow rate of the negative pressure pipeline is estimated to be about 0.9-1.0 meter3About/second, thereby utilizing the flue negative pressure to take away the light raise dust that produces in the ash discharge process, retrieve to the electric precipitation, reduce the dust emission in the atmosphere.
In some embodiments, the suction mode of the above embodiments cannot be used due to maintenance of the unit, stoppage of the fan, and the like, and the suction outlet 62 is connected to a large power vacuum cleaner widely used in a power plant to perform vacuum suction.
In this embodiment, a small relay blower 8 is additionally installed on the pipeline of the dust collection pipe 6 to further enhance the negative pressure dust collection effect. More importantly, when the flue at the inlet of the electric dust collector is used as a negative pressure device, the relay fan 8 is added, and the problem of unstable negative pressure of the flue can be solved.
With respect to the location of the dust suction inlet end 61 of the dust suction pipe 6, in some embodiments, the dust suction pipe 6 is disposed deep into the enclosed space 51 defined by the dust cover 5, such that the dust suction inlet end 61 is disposed close to the dust discharge port, e.g., the dust suction inlet end 61 is close to and opposite to the lower dust discharge port 42, which enhances the dust suction effect on the dust.
In some embodiments, the dust suction inlet end 61 disposed in the enclosed space 51 is further connected to a funnel-shaped dust suction hood, one end of the dust suction hood with a small diameter is connected to the dust suction inlet end 61, the funnel-shaped dust suction hood is not too high to be arranged at a level with or slightly higher than the dust discharge opening, and the funnel opening is aligned with the dust discharge opening as much as possible, so as to further enhance the dust suction effect.
The water curtain nozzle 7 is a nozzle having an atomizing effect, and is disposed on the periphery of the dust cover 5 at a height above or above the dust cover 5. In this embodiment, the water curtain nozzle 7 is disposed on the bracket of the electric dust collecting hopper 1, and the local washing water is received through the rubber hose 9, so that a water curtain can be formed on the periphery of the dust cover 5 to suppress the external dust of the dust cover 5. As already mentioned, the enclosed space 51 does not necessarily have to be completely sealed in theory, so that the assistance of the water curtain nozzle 7 is a useful complement.
In practical use, the water curtain formed by the water curtain nozzle 7 has a relatively more remarkable wetting effect on the ground dust, so that secondary flying of the dust can be reduced. However, the dust suppression and capture effect is limited, so in this embodiment, a dust suppressant dosing pump 10 is added to the pipeline of the water curtain nozzle 7, so that the water curtain nozzle 7 has a wet chemical dust suppressant in the water curtain. The wet chemical dust suppressant is a mixture of hygroscopic chemical substances and a surfactant. When the dust particles contact with the water mist particles, a wrapping mass of hydrophobic group affinity dust particles and hydrophilic group affinity water solution surrounding the dust particles is formed to fully wet the dust, and the wetting speed of the dust is increased along with the increase of the concentration of the solution. The pressure of the water curtain nozzle 7 for forming the spray is about 8bar, and the washing water can basically meet the requirement. In a practical experiment, the ash discharge amount of a single ash bucket of a certain thermal power plant is about 2 tons/half hour, and the required washing water flow is very small.
The water curtain nozzle 7 can adopt a fan-shaped nozzle and/or a conical nozzle, the two nozzles can respectively generate two different sprays of a fan shape and a conical shape, and the two sprays can be selected according to the dust suppression effect of the two sprays in practical application.
Before the dust discharging operation is started, the pipeline valve of the dust suction pipe 6 and the flushing water valve of the water curtain nozzle 7 can be opened in advance, and the dust suppressant dosing pump 10 is operated to enter a dust suppression state in advance.
The dust suppression system of the electric dust removal dust hopper comprehensively uses negative pressure dust collection, a shielding dust cover and a chemical spraying dust suppression technology. The negative pressure dust collection mode is innovatively used, and the negative pressure of the flue of the thermal power generating unit is adopted according to local conditions to realize dust absorption in the ash discharge process; a relay fan is adopted to compensate the unstable condition of the negative pressure of the flue; the special canvas dust cover is matched, so that the site construction is more convenient and faster; the adoption of the wet chemical dust suppressant further reduces the pressing and catching of escaping dust.
The device involved in the dust suppression system of the electric dust and ash bucket of the embodiment is easy to manufacture and obtain, convenient to install and configure, and completely configurable into a special dust suppression system convenient to disassemble, assemble and move, and comprises the following parts: the negative pressure dust suction port or the dust suction vehicle taken from the flue, the dust suction hose, the corresponding fast-assembling interface, the small relay fan, the water curtain wall formed by the special canvas dust cover convenient for fast assembly and disassembly and the nozzle, and the dust suppressant feeding equipment have the advantages of small investment of the whole system, remarkable practical effect, and better popularization prospect in the field from the aspects of cost, feasibility of application and the like.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides an electric precipitation ash bucket presses down dirt system which characterized in that includes:
a dust cover for defining an enclosed space adapted to position a dust discharge within the enclosed space;
one end of the dust collection pipe is communicated with the closed space, and the other end of the dust collection pipe is connected with a negative pressure device; and
and the water curtain nozzle is arranged on the periphery of the dust cover and used for spraying a water curtain to suppress dust.
2. The electric dedusting ash bucket dust suppression system as set forth in claim 1, wherein the dust cover is made of three-proof cloth or canvas meeting the dust prevention requirement in ash discharge operation.
3. The electric precipitation dust hopper dust suppression system of claim 1, wherein the dust cover includes an openable and closable access opening to facilitate access by an operator.
4. The electric precipitation dust hopper dust suppression system of claim 1, wherein the dust shield is configured to cooperate with the electric precipitation device and the worksite floor to cooperatively define the enclosed space.
5. The electric dedusting ash bucket dust suppression system as recited in claim 1, wherein one end of the dust suction pipe extends into the enclosed space and is arranged at a position close to the ash discharge port.
6. The electric dust removal ash bucket dust suppression system of claim 1, wherein a relay fan is further arranged on the pipeline of the dust collection pipe to accelerate the air flow in the dust collection pipe to flow to the negative pressure device.
7. The electric dedusting ash bucket dust suppression system as recited in claim 1, wherein the dust suction pipe is a flexible pipe.
8. The electric dust removal hopper dust suppression system as recited in claim 1, wherein said negative pressure device is a vacuum vehicle or a flue of an electric dust removal inlet.
9. The electric dedusting dust suppression system as set forth in claim 1, wherein a suppressant feeding pump is further disposed on the water pipe connected to the water curtain nozzle, so that the water curtain nozzle can spray suppressant.
10. The electric dust removal hopper dust suppression system of claim 1, wherein the water curtain nozzles are fan nozzles and/or cone nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921844030.5U CN211025600U (en) | 2019-10-30 | 2019-10-30 | Dust suppression system of electric dust removal ash bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921844030.5U CN211025600U (en) | 2019-10-30 | 2019-10-30 | Dust suppression system of electric dust removal ash bucket |
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| Publication Number | Publication Date |
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| CN211025600U true CN211025600U (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921844030.5U Active CN211025600U (en) | 2019-10-30 | 2019-10-30 | Dust suppression system of electric dust removal ash bucket |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110665320A (en) * | 2019-10-30 | 2020-01-10 | 华能国际电力股份有限公司上海石洞口第二电厂 | Dust suppression system of electric dust removal ash bucket |
-
2019
- 2019-10-30 CN CN201921844030.5U patent/CN211025600U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110665320A (en) * | 2019-10-30 | 2020-01-10 | 华能国际电力股份有限公司上海石洞口第二电厂 | Dust suppression system of electric dust removal ash bucket |
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