CN218435544U - Gas ring pipe device for low-calorific-value gas burning double-hearth kiln - Google Patents
Gas ring pipe device for low-calorific-value gas burning double-hearth kiln Download PDFInfo
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- CN218435544U CN218435544U CN202222968464.4U CN202222968464U CN218435544U CN 218435544 U CN218435544 U CN 218435544U CN 202222968464 U CN202222968464 U CN 202222968464U CN 218435544 U CN218435544 U CN 218435544U
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Abstract
The utility model discloses a gas ring pipe device for a low-calorific-value gas burning double-chamber kiln, which comprises a gas ring pipe and a spray gun arranged on the gas ring pipe; the gas inlet end of the gas ring pipe is connected to a gas supply pipe network through a pneumatic quick-cutting valve group; the spray gun is connected with the gas ring pipe through flexible connection; a one-way valve is arranged between the spray gun and the flexible connection; a cooling blowpipe is connected between the gas inlet end of the gas ring pipe and the pneumatic quick-cutting valve group; the cooling air blowing pipe is connected to a cooling air pressure pipe network through a first pneumatic valve; a nitrogen purging pipe is arranged between the first pneumatic valve and the gas inlet end of the gas circular pipe of the cooling blowpipe; the gas ring pipe device for the low-calorific-value gas burning double-chamber kiln has a simple structure, and not only realizes the gas distribution function, but also realizes the spray gun cooling air distribution function; the ash surface caused by convection can be prevented from entering the gas ring pipe, so that the service life of the whole set of equipment of the gas ring pipe and the spray gun is greatly prolonged.
Description
Technical Field
The utility model particularly relates to a gas ring canal device for a low-calorific value gas burning double-hearth kiln, which belongs to the technical field of gas burning double-hearth kiln components.
Background
The double-chamber kiln is a parallel flow and heat storage type double-chamber shaft kiln, is influenced by the process characteristics, and has the main advantages of higher heat utilization rate, low temperature of discharged waste gas, low dust content, wide fuel adaptability and the like; based on the advantages, the market share of the double-hearth kiln is higher and higher, in recent years, due to ultra-low emission and carbon emission control, the coal-fired double-hearth kiln is more and more tightly controlled, newly-built gas-fired double-hearth kilns are gradually increased, but due to the fact that high-calorific-value gas of steel enterprises is limited, the gas-fired double-hearth kiln is limited to be further developed; with the gradual increase of the recovery ratio of converter gas of domestic iron and steel production enterprises in recent years, the double-hearth kiln is used for lime calcination again by utilizing low-calorific-value gas, the problem of insufficient supply of the gas for the double-hearth kiln can still exist in stages due to energy balance of the whole factory, so that the kiln is stopped for a short time, after the kiln is stopped, because the inner ring spray gun and the outer ring spray gun have temperature gradients, the temperature difference forms convection through the gas ring pipe, heat is transferred to the gas ring pipe and the soft connection for connecting the spray guns, the service life of the soft connection is greatly reduced, meanwhile, due to the convection, hot gas carries ash surfaces to enter the gas ring pipe, the gas ring pipe is deposited, and finally the gas ring pipe is blocked, so that the service life is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a gas ring pipe device for a low-calorific-value gas burning double-chamber kiln, which has simple structure, not only realizes the gas distribution function, but also realizes the spray gun cooling air distribution function; the service life of the whole set of equipment of the gas ring pipe and the spray gun can be greatly prolonged.
The utility model discloses a gas ring pipe device for a low-heat value gas burning double-chamber kiln, which comprises a gas ring pipe and a spray gun arranged on the gas ring pipe; the gas inlet end of the gas ring pipe is connected to a gas supply pipe network through a pneumatic quick-cutting valve group; the spray gun is connected with the gas ring pipe through flexible connection; a one-way valve is arranged between the spray gun and the flexible connection; a cooling blowpipe is connected between the gas inlet end of the gas ring pipe and the pneumatic quick-cutting valve group; the cooling air blowing pipe is connected to a cooling air pressure pipe network through a first pneumatic valve; a nitrogen purging pipe is arranged between the first pneumatic valve and the gas inlet end of the gas circular pipe of the cooling blowpipe; and a second pneumatic valve is arranged on the nitrogen purging pipe.
Furthermore, the flexible connection is composed of metal expansion joints, the flexible connection is replaced by the high-temperature-resistant and corrosion-resistant metal expansion joints, the length of the flexible connection is shortened, and the service life of the whole flexible connection can be prolonged.
Further, the device is directly installed on a newly-built low-calorific-value gas burning double-hearth kiln, or is used for improving an old low-calorific-value gas burning double-hearth kiln.
Compared with the prior art, the gas ring pipe device for the low-calorific-value gas burning double-chamber kiln changes the flexible connection into a high-temperature-resistant corrosion-resistant metal expansion joint, and adds the one-way valve between the flexible connection and the spray gun, and in addition, the spray gun cooling air and the nitrogen purging pipe are connected into the gas ring pipe, and the gas ring pipe is used as the spray gun cooling air ring pipe during heat storage; the ash surface caused by convection can be prevented from entering the gas ring pipe, so that the service life of the whole set of equipment of the gas ring pipe and the spray gun is greatly prolonged.
Drawings
Fig. 1 is a schematic view of the arrangement structure of the existing double-hearth kiln and gas ring pipe of the present invention.
Fig. 2 is a schematic view of the arrangement structure of the double-hearth kiln and the gas ring pipe in example 1 of the present invention.
Fig. 3 is a schematic view of the overall structure of a gas loop pipe according to embodiment 1 of the present invention.
Fig. 4 is a schematic view of the connection structure of the gas loop pipe and the lance according to embodiment 1 of the present invention.
Detailed Description
Example 1:
the gas ring pipe device for the low-heating-value gas burning double-chamber kiln shown in the figures 2 to 4 comprises a gas ring pipe 1 and a spray gun 2 arranged on the gas ring pipe; the gas inlet end of the gas ring pipe 1 is connected to a gas supply pipe network 4 through a pneumatic quick-cutting valve group 3; the spray gun 2 is connected with the gas ring pipe 1 through a flexible connection 5; a one-way valve 6 is arranged between the spray gun 2 and the flexible connection; a cooling blowpipe 7 is connected between the gas inlet end of the gas ring pipe 1 and the pneumatic quick-cutting valve group 3; the cooling blowpipe 7 is connected to a cooling air pressure pipe network through a first pneumatic valve 8; a nitrogen purging pipe 9 is arranged between the first pneumatic valve 8 and the gas inlet end of the gas ring pipe 1 of the cooling blowpipe 7; and a second air-operated valve 10 is arranged on the nitrogen purging pipe 9.
The flexible connection 5 is composed of metal expansion joints, the flexible connection is replaced by the high-temperature-resistant corrosion-resistant metal expansion joints, the length of the flexible connection is shortened, and the service life of the whole flexible connection can be prolonged.
The utility model discloses a two thorax kilns of low heat value gas burning are with coal gas ring pipe device, direct mount on newly-built low heat value gas burning two thorax kilns, or burn two thorax kilns to old low heat value gas and improve, burn two thorax kilns to old low heat value gas and improve the process as follows:
as shown in figure 1, the basic structure of the existing 600t double-chamber kiln is shown, wherein A is a double-chamber kiln body, B is a spray gun cooling air ring pipe, C is a nitrogen injection pipe, D is a cold air pipe, and 1 is a gas ring pipe
Removing a spray gun cooling air ring pipe, removing a flexible connection between the spray gun cooling air ring pipe and a spray gun, plugging a removal end of the spray gun cooling air ring pipe through a sealing plate, connecting the spray gun to a straight pipe section, and connecting the other end of the straight pipe section to a check valve; connecting the one-way valve to the high-temperature-resistant corrosion-resistant metal expansion joint through a connecting flange; the other end of the high-temperature-resistant corrosion-resistant metal expansion joint is connected with the gas ring pipe through a flange pipe section; finally, the gas inlet end of the gas ring pipe is improved, namely a three-way pipe is connected in series on the gas inlet pipe of the gas ring pipe; and a cooling blowpipe is arranged on the three-way pipe, then a tee joint is connected in series on the cooling blowpipe, and the third end of the tee joint is connected into a nitrogen purging pipe.
The utility model discloses a coal gas ring canal device uses on the two thorax kilns of 600t, carries out the comparison with the two thorax kilns of current 600t, the utility model discloses increase check valve 66 to reduce the preparation and the installation cost of spray gun cooling air ring canal, reduced the flexible coupling between spray gun cooling air ring canal and the spray gun, for the two thorax kilns of current 600t, have following characteristics:
1. the utility model can avoid the blockage of the gas ring pipe, and prolong the service life of the gas ring pipe by 1.0 to 1.5 times; the gas ring pipes used by various companies are different in form, material and thickness, so that the economic benefit is not predicted well; however, the gas circular pipe needs long time for manufacturing and replacing, each time the replacement needs 4-6 days, the production of the 600t double-chamber kiln is increased by 2400t to 3600t within the service life cycle of a kiln body according to the calculation of 5 days for replacing one set of spray gun.
2. The utility model can prolong the service life of the metal hose for connecting the spray gun by 0.5 to 1.0 time; the connection spray gun soft connection forms and materials used by various companies are different, so that the economic benefit is not predicted well; according to the measurement and calculation of a 316 stainless steel metal hose, 7.3 ten thousand yuan can be saved in each replacement; the yield of the 600t double-hearth kiln can be increased by 600t to 900t in a soft connection period according to the calculation that 1.5 days is spent for replacing one set of spray gun.
3. The utility model can prolong the service life of the spray gun by 1.0 to 1.5 times; the types and the materials of spray guns of all companies are different, so that the economic benefit is not easy to predict; the replacement cost is estimated according to the material quality of the spray gun 0Gr25Ni20, and can be reduced by 30 to 60 ten thousand yuan per spray gun replacement period by considering the replacement cost; the production of the 600t double-chamber kiln can be increased by 1200t to 2400t in one spray gun period according to the calculation of 4 days for replacing one set of spray gun.
4. The gas ring pipe of the utility model not only realizes the gas distribution function, but also realizes the spray gun cooling air distribution function.
The above-mentioned embodiment is only the preferred embodiment of the present invention, so all according to the utility model discloses the patent application scope structure, characteristics and principle do equivalent change or modify, all include the utility model discloses the patent application scope.
Claims (3)
1. A gas ring pipe device for a low-calorific-value gas burning double-hearth kiln comprises a gas ring pipe and a spray gun arranged on the gas ring pipe; the gas inlet end of the gas ring pipe is connected to a gas supply pipe network through a pneumatic quick-cutting valve group; the method is characterized in that: the spray gun is connected with the gas ring pipe through flexible connection; a one-way valve is arranged between the spray gun and the flexible connection; a cooling blowpipe is connected between the gas inlet end of the gas ring pipe and the pneumatic quick-cutting valve group; the cooling air blowing pipe is connected to a cooling air pressure pipe network through a first pneumatic valve; a nitrogen purging pipe is arranged between the first pneumatic valve and the gas inlet end of the gas circular pipe of the cooling blowpipe; and a second pneumatic valve is arranged on the nitrogen purging pipe.
2. The gas ring pipe device for the low heating value gas burning double-chamber kiln as claimed in claim 1, wherein: the flexible connection is composed of metal expansion joints.
3. The gas ring pipe device for the low heating value gas burning double-chamber kiln as claimed in claim 1, wherein: the device is directly installed on a newly-built low-calorific-value gas burning double-hearth kiln, or is used for improving an old low-calorific-value gas burning double-hearth kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222968464.4U CN218435544U (en) | 2022-11-08 | 2022-11-08 | Gas ring pipe device for low-calorific-value gas burning double-hearth kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222968464.4U CN218435544U (en) | 2022-11-08 | 2022-11-08 | Gas ring pipe device for low-calorific-value gas burning double-hearth kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218435544U true CN218435544U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222968464.4U Active CN218435544U (en) | 2022-11-08 | 2022-11-08 | Gas ring pipe device for low-calorific-value gas burning double-hearth kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218435544U (en) |
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2022
- 2022-11-08 CN CN202222968464.4U patent/CN218435544U/en active Active
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