CN215886914U - Pneumatic ash conveying and pressure relieving device for total ash bin of dry quenching process dust removing system - Google Patents
Pneumatic ash conveying and pressure relieving device for total ash bin of dry quenching process dust removing system Download PDFInfo
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- CN215886914U CN215886914U CN202122137079.0U CN202122137079U CN215886914U CN 215886914 U CN215886914 U CN 215886914U CN 202122137079 U CN202122137079 U CN 202122137079U CN 215886914 U CN215886914 U CN 215886914U
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Abstract
The utility model discloses a pneumatic ash conveying and pressure relieving device for a total ash bin of a dust removing system of a dry quenching process, which relates to the technical field of coking industry and comprises a dust baffle plate and a pressure relief pipe, wherein one end of the pressure relief pipe is connected to the top of the total ash bin; the dust board is fixed in total ash bin, and the both sides of dust board are connected with total ash bin inner wall respectively, and its lower extreme suspension is in total ash bin upper portion, and the upper end extends to total ash bin top and separates dust removal import and pressure release mouth. The utility model solves the problems that the pressure relief is easy to lose effectiveness in the dust collecting and storing process of the total ash bin of the dust removing system of the existing dry quenching process, dust leakage pollutes the atmosphere and influences the production.
Description
Technical Field
The utility model relates to the technical field of coking industry, in particular to a pneumatic ash conveying and pressure relieving device for a total ash bin of a dust removing system of a dry quenching process.
Background
The dry quenching is a process for producing steam by absorbing the waste heat of red coke at 1000 +/-50 ℃ by using inert circulating gas (nitrogen) in the coking industry. In order to protect equipment such as a boiler, a circulating fan, a process pipeline and the like, a process dust removal device is arranged between a circulating gas outlet of a dry quenching furnace and a boiler inlet, dust is removed through a primary dust remover and a secondary dust remover, the dust removers adopt cyclone dust removal, and dust collected by the dust removers is conveyed to a main ash bin through pneumatic power and then is recycled. The top of the total ash bin is originally provided with a bin top bag type dust collector for purifying and decompressing tail gas in pneumatic transmission, but moisture contained in compressed air used in pneumatic transmission is easy to dewfall on the bin top bag type dust collector, and the design is unreasonable, the problems that the total ash bin is seriously expanded due to overlarge resistance of the bin top bag type dust collector and untimely decompression, the vibration of the total ash bin top bag dust removal bin is large, the strong vibration of a dust removal axial flow fan and the like are caused in the production process, the decompression is invalid, and the decompression is invalid and is expressed in the following aspects: 1. pulse type strong pressure is generated in the main ash bin in the pneumatic ash conveying process, a cloth bag in the bag type dust collector is subjected to pressure release in an extrusion mode to separate dust, the pressure release mode can enable the pulse pressure of a system formed by the main ash bin and the bin top bag type dust collector to be instantly increased, and therefore weak places such as welding seams of the main ash bin and the bin top bag type dust collector often expand and crack, dust overflows and pollutes the environment; 2. the air volume of an axial flow fan matched with the bag type dust collector at the top of the total ash bin is too small, so that the pressure cannot be released in time, the total ash bin is pressed seriously, the bin wall is squeezed and cracked, dust overflows, and the environment is polluted; 3. cumulative effect of resistance of bag house top dust collector: under the condition that the cloth bag is clean, the excessive pressure in the total ash bin can be discharged, but the pressure of the gas to be conveyed is high, the cloth bag is dusted along with the dust accumulated on the surface of the cloth bag, the circulation of the air flow is seriously influenced, the pressure build-up in the total ash bin is serious, the effective pneumatic ash conveying cannot be realized, the production is influenced, the bin wall is finally crushed, the dust overflows, and the dust leakage and the atmosphere pollution are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pneumatic ash conveying and pressure relieving device for a total ash bin of a dust removing system of a dry quenching process, which can solve the problems that the pressure relief is easy to lose effect, dust leakage pollutes the atmosphere and the production is influenced in the dust collecting and storing processes of the total ash bin of the dust removing system of the existing dry quenching process.
In order to solve the problems, the utility model adopts the technical scheme that: the pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removing system of the coke dry quenching process comprises a dust baffle plate and a pressure relief pipe, wherein one end of the pressure relief pipe is connected to the top of the total ash bin, the top of the total ash bin is provided with a dust removing inlet and a pressure relief opening, the pressure relief pipe is communicated with the total ash bin through the pressure relief opening, the other end of the pressure relief pipe is connected with an environmental dust collecting dry pipe, and the pressure relief pipe is communicated with a coke dry quenching environmental dust remover through the environmental dust collecting dry pipe; the dust baffle is fixed in the total ash bin, the both sides of dust baffle respectively with total ash bin inner wall is connected, its lower extreme suspension in total ash bin upper portion, the upper end extends to total ash bin top will the dust removal import with the pressure release mouth separates.
In the technical scheme of the pneumatic ash conveying and pressure relieving device for the total ash bin of the dry quenching process dust removal system, a more specific technical scheme can also be as follows: the dust baffle is vertically arranged in the total dust bin, and the distance between the dust removal inlet and the dust baffle is 1.5-2 m.
Further, the inner diameter ratio of the pressure relief pipe to the environment dust collection main pipe is 1: 18 to 25.
Furthermore, the dust board is a wear-resistant plate, and the pressure relief pipe is a wear-resistant pipe.
Furthermore, the dust board is a low-alloy high-strength steel plate, and the pressure relief pipe is a low-alloy steel pipe.
Further, the plate height of the dust baffle plate is not more than one third of the height of the total ash bin.
Furthermore, a stop valve is installed on the pressure relief pipe.
Furthermore, two stop valves are installed on the pressure relief pipe, and the distance between the total ash bin and the environment dust collection dry pipe and the corresponding stop valve is not more than 300 mm.
Furthermore, two dust removal inlets are formed in the top of the total ash bin, and the two dust removal inlets are respectively connected with the primary dust removal pipe and the secondary dust removal pipe.
Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:
1. the pressure relief pipe is connected between the main ash bin and the environmental dust collection dry pipe, pressure can be relieved through a coke dry quenching environmental dust remover, the dust blocking plate for isolating the dust removal inlet and the pressure relief opening is arranged at the upper part of the main ash bin, so that a gas-solid mixture entering the main ash bin can decelerate after impacting the dust blocking plate, and dust in the gas-solid mixture is settled and separated along the plate gravity, the dust content of mixed gas during pressure relief is reduced, the normal collection and dust storage of the main ash bin are ensured, the lasting and effective pressure relief function is ensured, the expansion crack of welding lines on the bin wall and the bin body edge of the main ash bin is avoided, the pressure relief can also be prevented, and the normal development of production is ensured; and a small bag type dust collector on the top of the total ash bin is eliminated, so that the energy consumption and the maintenance cost of the bag type dust collector on the top of the total ash bin are saved.
2. The distance atmosphere between the dust removal inlet and the dust baffle can obtain good gas-solid separation, and the dust amount entering the pressure relief pipe is reduced.
3. The pipe diameter ratio of the pressure relief pipe and the environment dust collection dry pipe can not only effectively relieve pressure, but also can not influence the dust removal effect of the coke dry quenching environment dust remover.
4. The dust baffle and the pressure relief pipe are made of wear-resistant materials, so that the abrasion of dust particles to the plate and the pipe can be reduced, and the service life is prolonged.
5. The plate height of the dust baffle plate is not more than one third of the height of the total ash bin, so that the lower end of the dust baffle plate is prevented from being too low, and gas passing through the lower part of the dust baffle plate can lift dust collection at the bottom of the bin to influence the gas-solid separation effect.
6. Two stop valves are arranged on the pressure relief pipe for one standby, the total ash bin and the dry quenching environment dust remover can be independently used or overhauled, and the installation positions of the stop valves are convenient for workers to operate at high altitude.
7. The top of the total ash bin is provided with two dust removal inlets which are connected with two dust removal pipes, so that the dust removal efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of a pneumatic ash conveying and pressure relieving device of a total ash bin of a dust removal system of the dry quenching process.
Fig. 2 is a schematic view of the internal structure of the overall ash bin.
Fig. 3 is a sectional view taken in the direction of a-a in fig. 2.
The reference numbers illustrate: 1. a pressure relief pipe; 2. an environmental dust collection dry pipe; 3. a dry quenching environmental dust remover; 4. a total ash bin; 4-1, a dust removal inlet; 4-2, a pressure relief opening; 5. a dust guard; 6. a primary dust removal pipe; 7. a secondary dust removal pipe; 8. and a stop valve.
Detailed Description
The utility model will be further described in detail with reference to the following examples:
the pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removing system of the dry quenching process shown in fig. 1 to 3 mainly comprises a dust baffle 5 arranged at the upper part of the total ash bin 4 and a pressure relief pipe 1 connected with the total ash bin 4 and an environmental dust collection dry pipe 2, wherein one end of the pressure relief pipe 1 is connected to the top of the total ash bin 4, the other end of the pressure relief pipe is connected to the pipe wall of the environmental dust collection dry pipe 2, and the pressure relief pipe 1 is communicated with a dry quenching environmental dust remover 3 through the environmental dust collection dry pipe 2 and is used for transferring the internal pressure of the total ash bin 4; the top of the total ash bin 4 is provided with a dust removal inlet 4-1 and a pressure relief opening 4-2, and the pressure relief pipe 1 is communicated with the interior of the total ash bin 4 through the pressure relief opening 4-2. In order not to influence the dust removal effect of the dry quenching environmental dust remover 3, the inner diameter of the pressure relief pipe 1 is far smaller than the inner diameter of the environmental dust collection main pipe 2, and the inner diameter ratio of the pressure relief pipe 1 to the environmental dust collection main pipe 2 is 1: 18 to 25. Two stop valves 8 for one standby are arranged on the pressure relief pipe 1, and the connection between the pressure relief pipe 1 and the environmental dust collection main pipe 2 is positioned at seven to eight meters high above the ground on the basis of the principle of near access, so that the distances between the total ash bin 4 and the environmental dust collection main pipe 2 and the corresponding stop valves 8 are not more than 300mm for convenient operation; the stop valve 8 is in a normally closed state and is opened during ash conveying, so that the normal use of the dust remover 3 in the dry quenching environment is not influenced. The dust baffle plate 5 is welded and fixed on the upper part of the total ash bin 4 and used for carrying out gas-solid separation on a gas-solid mixture entering the bin, is vertically arranged and divides the upper part of the total ash bin 4 into two bins. Two sides of the dust board 5 are respectively connected with the inner wall of the total ash bin 4, the lower end of the dust board is suspended at the upper part of the total ash bin 4, the upper end of the dust board extends to the top of the total ash bin 4 to separate the dust removal inlet 4-1 from the pressure relief opening 4-2, the distance between the dust removal inlet 4-1 and the dust board 5 is 1.5-2 m, and the height of the dust board 5 is not more than one third of the height of the total ash bin 4. Two dust removal inlets 4-1 are formed in the top of the total ash bin 4, each dust removal inlet 4-1 is connected with a primary dust removal pipe 6 and a secondary dust removal pipe 7 respectively, the dust baffle 5 in the embodiment is made of a low-alloy high-strength steel plate of Q345, the pressure relief pipe 1 is made of a low-alloy steel pipe of 16Mn (Q345B), and the dust baffle and the pressure relief pipe in other embodiments can be made of wear-resistant plates and wear-resistant pipes made of other materials such as ceramics.
When the pneumatic ash conveying and pressure relieving device for the total ash bin of the dry quenching process dust removing system is used, the primary dust removing pipe 6 is connected with the primary cyclone dust collector for dry quenching process dust removal, the secondary dust removing pipe 7 is connected with the secondary cyclone dust collector, and dust collected by process dust removal is conveyed to the total ash bin 4 through the primary dust removing pipe 6 and the secondary dust removing pipe 7 to be concentrated and then reused by utilizing a pneumatic conveying principle. The dust conveyed by air enters a chamber at one side of a main dust bin 4 from two dust removal inlets 4-1 through a primary dust removal pipe 6 and a secondary dust removal pipe 7, the formed gas-solid mixture impacts a dust baffle plate 5 and then decelerates, the dust in the gas-solid mixture settles along the gravity of the plate, most of the dust settles at the bottom of the main dust bin 4, the gas separated by the gravity settling separation principle carries a small amount of dust and enters the chamber at the other side from the lower end of the dust baffle plate 5, and enters an environmental dust collection dry pipe 2 through a pressure release pipe 1 with an opened stop valve 8, and the dry quenching environmental dust remover 3 is used for pressure release and secondary dust removal. The dust which overflows is uniformly separated and recovered by the dust remover 3 in the dry quenching environment, the dust removing effect of the dust remover meets the emission limit value requirement of 50 mg/m 3 in the emission concentration GB 16171-2012 of dust removing particles in the dry quenching environment, and the dust remover is a set of relatively perfect dust removing device and can be used for dust removal at a coke discharging chute at the bottom of a coke charging port dry quenching furnace and a belt transfer point. The pressure relief device ensures that the total ash bin 4 is not easy to expand and crack when finishing concentrated storage of dust, thereby causing dust leakage and environmental pollution, and avoiding the failure of normal ash conveying and the damage of the balance of the dust removal process of dry quenching.
Claims (9)
1. The utility model provides a pneumatic ash conveying pressure relief device in dry coke quenching technology dust pelletizing system total ash storehouse which characterized in that: the coke dry quenching device comprises a dust baffle and a pressure relief pipe, wherein one end of the pressure relief pipe is connected to the top of a total ash bin, the top of the total ash bin is provided with a dust removal inlet and a pressure relief opening, the pressure relief pipe is communicated with the total ash bin through the pressure relief opening, the other end of the pressure relief pipe is connected with an environmental dust collection dry pipe, and the pressure relief pipe is communicated with a coke dry quenching environmental dust remover through the environmental dust collection dry pipe; the dust baffle is fixed in the total ash bin, the both sides of dust baffle respectively with total ash bin inner wall is connected, its lower extreme suspension in total ash bin upper portion, the upper end extends to total ash bin top will the dust removal import with the pressure release mouth separates.
2. The pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removal system of the coke dry quenching process of claim 1, which is characterized in that: the dust baffle is vertically arranged in the total dust bin, and the distance between the dust removal inlet and the dust baffle is 1.5-2 m.
3. The pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removal system of the coke dry quenching process of claim 2, wherein: the inner diameter ratio of the pressure relief pipe to the environment dust collection main pipe is 1: 18 to 25.
4. The pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removal system of the coke dry quenching process of claim 3, wherein: the dust board is a wear-resistant plate, and the pressure relief pipe is a wear-resistant pipe.
5. The pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removal system of the coke dry quenching process of claim 4, wherein: the dust board is a low-alloy high-strength steel plate, and the pressure relief pipe is a low-alloy steel pipe.
6. The pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removal system of the dry quenching process as claimed in claim 5, wherein: the plate height of the dust baffle plate is not more than one third of the height of the total ash bin.
7. The pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removing system of the dry quenching process as claimed in any one of claims 1 to 6, wherein: and the pressure relief pipe is provided with a stop valve.
8. The pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removal system of the dry quenching process of claim 7, wherein: the two stop valves are installed on the pressure relief pipe, and the distance between the total ash bin and the environment dust collection dry pipe and the corresponding stop valve is not more than 300 mm.
9. The pneumatic ash conveying and pressure relieving device for the total ash bin of the dust removal system of the coke dry quenching process of claim 8, wherein: two dust removal inlets are formed in the top of the total ash bin, and the two dust removal inlets are respectively connected with a primary dust removal pipe and a secondary dust removal pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122137079.0U CN215886914U (en) | 2021-09-06 | 2021-09-06 | Pneumatic ash conveying and pressure relieving device for total ash bin of dry quenching process dust removing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122137079.0U CN215886914U (en) | 2021-09-06 | 2021-09-06 | Pneumatic ash conveying and pressure relieving device for total ash bin of dry quenching process dust removing system |
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| Publication Number | Publication Date |
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| CN215886914U true CN215886914U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122137079.0U Active CN215886914U (en) | 2021-09-06 | 2021-09-06 | Pneumatic ash conveying and pressure relieving device for total ash bin of dry quenching process dust removing system |
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| CN (1) | CN215886914U (en) |
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2021
- 2021-09-06 CN CN202122137079.0U patent/CN215886914U/en active Active
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