CN211925709U - Primary cooling fire tube boiler for coke oven crude gas - Google Patents
Primary cooling fire tube boiler for coke oven crude gas Download PDFInfo
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- CN211925709U CN211925709U CN202020093627.7U CN202020093627U CN211925709U CN 211925709 U CN211925709 U CN 211925709U CN 202020093627 U CN202020093627 U CN 202020093627U CN 211925709 U CN211925709 U CN 211925709U
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- tube boiler
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Abstract
The utility model provides a coke oven raw coke oven gas is cold firetube boiler just, it relates to a firetube boiler, the utility model discloses a solve in the coke oven raw coke oven gas exhaust most waste heat can not obtain the problem that effectively utilizes and cause the huge waste of energy, the utility model discloses a drum, boiler inlet pipeline and boiler outlet pipeline, its characterized in that: the novel coke oven crude gas primary cooling fire tube boiler further comprises a plurality of descending pipes, a plurality of ascending pipes and a plurality of fire tube boiler assemblies, the outlet of the boiler barrel is connected with the inlet of the fire tube boiler assemblies through the descending pipes, the outlet of the fire tube boiler assemblies is connected with the inlet of the boiler barrel through the ascending pipes, each fire tube boiler is connected with a boiler inlet pipeline, and each fire tube boiler assembly is connected with a boiler outlet pipeline. Belongs to the technical field of boilers.
Description
Technical Field
The utility model relates to a firetube boiler, concretely relates to coke oven crude gas primary cooling firetube boiler belongs to boiler technical field.
Background
In the coking process, raw gas at 650-800 ℃ escapes from a coke oven carbonization chamber through an ascending pipe and converges into a gas collecting pipe, ammonia water at 70-75 ℃ is sprayed in the gas collecting pipe in the traditional process and is cooled to 80-85 ℃, gas and liquid are separated, then the gas is cooled to 21-35 ℃ through a primary cooler, and then the gas is sent to the subsequent production process. The effective energy carried out by the raw gas accounts for about 18& lt of the total output effective energy of the coke oven, most of the raw gas is transferred into the circulating ammonia water in the process, and low-temperature waste heat cannot be utilized, so that huge energy waste is caused in a traditional process system.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that the great waste of energy is caused to most waste heat of raw coke oven gas exhaust can not effectively utilize, and then provide a raw coke oven gas primary cooling firetube boiler.
The utility model discloses a solve the technical scheme that above-mentioned problem was taken and be:
the utility model discloses a drum, boiler inlet pipe and boiler outlet pipe, a novel coke oven crude gas pre-cooling fire tube boiler still includes a plurality of downtake, a plurality of tedge and a plurality of firetube boiler subassembly, and the access connection of downtake and firetube boiler subassembly is passed through in the export of drum, and the access connection of tedge and drum is passed through in the export of firetube boiler subassembly, and every firetube boiler all is connected with boiler inlet pipe, and every firetube boiler subassembly all is connected with boiler outlet pipe.
Furthermore, a first cut-off valve is arranged on a connecting pipeline of the boiler inlet pipeline and the fire tube boiler assembly.
Furthermore, a second cut-off valve is arranged on a connecting pipeline of the boiler outlet pipeline and the fire tube boiler assembly.
Furthermore, each fire tube boiler assembly comprises an upper cylinder, a middle cylinder, a lower cylinder, two first flanges and two second flanges, wherein the upper end of the middle cylinder is connected with the upper cylinder through one second flange, the lower end of the middle cylinder is connected with the lower cylinder through the other second flange, and the upper end of the upper cylinder and the lower end of the lower cylinder are respectively provided with the first flanges.
Furthermore, the lower part of each middle cylinder body is provided with a sewage discharge outlet, and the sewage discharge outlet is provided with a switch valve.
Furthermore, one end of the boiler outlet pipeline is provided with an induced draft fan.
The utility model has the advantages that:
the evaporation pipe section of the utility model is composed of a plurality of fire tube boilers, high-temperature crude gas flows in the tube, and the steam-water mixture flows outside the tube, so that the heat energy of the crude gas discharged by the coke oven can be recovered and converted into the energy of steam, and the heat source is suitable for power generation or heat source for process production; the utility model can reduce the coking cost and improve the cycle economy; the amount of the circulating cooling ammonia water can be reduced, the water pollution is reduced, and the ecological environment is improved; the utility model can adapt to the working condition of the coke oven and has stable work, high thermal efficiency, good starting performance and reliable operation.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1, and includes a drum 1, a boiler inlet pipe 4, and a boiler outlet pipe 6, and is characterized in that: the coke oven crude gas primary cooling fire tube boiler further comprises a plurality of descending pipes 2, a plurality of ascending pipes 3 and a plurality of fire tube boiler assemblies 5, an outlet of the boiler barrel 1 is connected with an inlet of the fire tube boiler assemblies 5 through the descending pipes 2, an outlet of the fire tube boiler assemblies 5 is connected with an inlet of the boiler barrel 1 through the ascending pipes 3, each fire tube boiler is connected with a boiler inlet pipeline 4, and each fire tube boiler assembly 5 is connected with a boiler outlet pipeline 6.
The waste heat recovery object of the utility model is a coke oven with all types in the coking industry at present; the temperature utilization range is 260-800 ℃, and the waste heat of the flue gas can be utilized in a larger temperature range. The shell of the fire tube boiler assembly 5 adopts an inner heat insulation structure, and the inner heat insulation structure consists of refractory mortar, an aluminum silicate fiber blanket, a tortoise shell net and a claw nail. The tubes of the heating surface of the evaporation tube section in the fire tube boiler assembly 5 are thick-walled tubes with a wall thickness of 4 to 8 mm. So as to improve the wear resistance of the pipe under the working condition of higher dust content and prolong the service life of the device. The tube on the heating surface of the evaporation tube section adopts a tube plate supporting structure, so that the safety and reliability of the structure are ensured.
The second embodiment is as follows: referring to fig. 1, the present embodiment will be described, and a first cut-off valve 4-1 is provided on a connection pipe between a boiler inlet pipe 4 and a fire tube boiler assembly 5 according to the present embodiment.
Other components and connections are the same as those in the first embodiment.
The third concrete implementation mode: referring to fig. 1, the present embodiment will be described, in which a second cut-off valve 6-1 is provided in a connection pipe between the boiler outlet pipe 6 and the fire tube boiler module 5.
Other components are connected in the same manner as in the first or second embodiment.
The fourth concrete implementation mode: referring to fig. 1, the embodiment is described, each fire tube boiler assembly 5 of the embodiment includes an upper cylinder 5-1, a middle cylinder 5-2, a lower cylinder 5-3, two first flanges 5-4 and two second flanges 5-5, the upper end of the middle cylinder 5-2 is connected to the upper cylinder 5-1 through one second flange 5-5, the lower end of the middle cylinder 5-2 is connected to the lower cylinder 5-3 through another second flange 5-5, and the upper end of the upper cylinder 5-1 and the lower end of the lower cylinder 5-3 are respectively provided with the first flanges 5-4.
So set up, the installation and the maintenance of single firetube boiler of being convenient for.
Other components and connection relationships are the same as those in the first, second or third embodiment.
The fifth concrete implementation mode: the embodiment is described by combining with figure 1, the lower part of each middle cylinder 5-2 of the embodiment is provided with a sewage outlet 5-2-1, and the position of the sewage outlet 5-2-1 is provided with a switch valve 5-2-2.
So set up, be convenient for regularly discharge the dirt.
Other components and connections are the same as those of the first, second, third or fourth embodiments.
The sixth specific implementation mode: referring to fig. 1, the present embodiment will be described, and an induced draft fan 7 is provided at one end of the boiler outlet duct 6 of the present embodiment.
Other components and connection relationships are the same as those in the first, second, third, fourth or fifth embodiment.
The working principle is as follows:
flue gas flow:
the flue gas takes a draught fan 7 arranged on an outlet pipeline of the boiler as flowing power, vertically penetrates through the heating surface of each fire tube boiler 5 from top to bottom through a boiler inlet pipeline 4 on the top of the fire tube boiler 5, heats media (steam and water) flowing on the outer side of a heating surface pipe, and because the flue gas and the media outside the heating surface pipe continuously exchange heat, the temperature of the flue gas is gradually reduced to about 260 ℃ and the flue gas is discharged out of the fire tube boiler. The cut-off valves are arranged on the gas pipelines at the inlet and the outlet of each fire tube boiler, a plurality of fire tube boilers can be arranged as required, and the maintenance or cleaning of a single boiler can be realized without influencing the normal operation of other boilers by closing the cut-off valves.
Steam-water system flow:
feed water from a feed pump enters a drum through a regulating valve, water in the drum enters an evaporation pipe section through a downcomer 2, the water is heated outside the evaporation pipe section to be changed into a steam-water mixture, the steam-water mixture enters the drum through a riser 3 to be subjected to steam-water separation, and the separated saturated steam is sent to a subsequent process through an outlet pipe.
The waste heat recovery object of the utility model is a coke oven with all types in the coking industry at present; the fire tube boiler adopts a module structure, so that the overhaul is convenient; the heating surface pipe of the evaporation pipe section in the fire tube boiler is supported by a pipe plate, so that the structure is safe and reliable; the outer side of the heating surface of the evaporation pipe section adopts a natural circulation mode; the utility model discloses a high-pressure squirt cleans the dust to manage.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment without departing from the technical scope of the present invention, but all the modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principle of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a coke oven raw coke oven gas is cold firetube boiler just, it includes boiler barrel (1), boiler inlet pipeline (4) and boiler outlet pipeline (6), its characterized in that: the coke oven crude gas primary cooling fire tube boiler further comprises a plurality of descending pipes (2), a plurality of ascending pipes (3) and a plurality of fire tube boiler assemblies (5), the outlet of the boiler barrel (1) is connected with the inlet of the fire tube boiler assemblies (5) through the descending pipes (2), the outlet of the fire tube boiler assemblies (5) is connected with the inlet of the boiler barrel (1) through the ascending pipes (3), each fire tube boiler is connected with a boiler inlet pipeline (4), and each fire tube boiler assembly (5) is connected with a boiler outlet pipeline (6).
2. The coke oven crude gas primary cooling fire tube boiler of claim 1, characterized in that: a first cut-off valve (4-1) is arranged on a connecting pipeline of the boiler inlet pipeline (4) and the fire tube boiler component (5).
3. The coke oven crude gas primary cooling fire tube boiler of claim 1, characterized in that: a second cut-off valve (6-1) is arranged on the connecting pipeline of the boiler outlet pipeline (6) and the fire tube boiler component (5).
4. The coke oven crude gas primary cooling fire tube boiler of claim 1, characterized in that: each fire tube boiler component (5) comprises an upper cylinder (5-1), a middle cylinder (5-2), a lower cylinder (5-3), two first flanges (5-4) and two second flanges (5-5), the upper end of the middle cylinder (5-2) is connected with the upper cylinder (5-1) through one second flange (5-5), the lower end of the middle cylinder (5-2) is connected with the lower cylinder (5-3) through the other second flange (5-5), and the upper end of the upper cylinder (5-1) and the lower end of the lower cylinder (5-3) are respectively provided with the first flanges (5-4).
5. The coke oven crude gas primary cooling fire tube boiler of claim 4, characterized in that: the lower part of each middle cylinder 5-2 is provided with a sewage draining exit (5-2-1), and the sewage draining exit (5-2-1) is provided with a switch valve (5-2-2).
6. The coke oven crude gas primary cooling fire tube boiler of claim 1, characterized in that: one end of the boiler outlet pipeline (6) is provided with an induced draft fan (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020093627.7U CN211925709U (en) | 2020-01-16 | 2020-01-16 | Primary cooling fire tube boiler for coke oven crude gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020093627.7U CN211925709U (en) | 2020-01-16 | 2020-01-16 | Primary cooling fire tube boiler for coke oven crude gas |
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| CN211925709U true CN211925709U (en) | 2020-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306523A (en) * | 2020-01-16 | 2020-06-19 | 中国船舶重工集团公司第七0三研究所 | Primary cooling fire tube boiler for coke oven crude gas |
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- 2020-01-16 CN CN202020093627.7U patent/CN211925709U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306523A (en) * | 2020-01-16 | 2020-06-19 | 中国船舶重工集团公司第七0三研究所 | Primary cooling fire tube boiler for coke oven crude gas |
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