CN211734274U

CN211734274U - Coal gas cooling and recovering device

Info

Publication number: CN211734274U
Application number: CN201922146553.9U
Authority: CN
Inventors: 蒋受宝; 沈育敏; 周国章
Original assignee: HUNAN SIWEI ENERGY ENVIRONMENT ENGINEERING CO LTD
Current assignee: HUNAN SIWEI ENERGY ENVIRONMENT ENGINEERING CO LTD
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-10-23
Anticipated expiration: 2029-12-04

Abstract

The coal gas cooling and recycling device comprises a main body framework, wherein at least one cooling device is arranged in the main body framework, the cooling device comprises a cylinder and at least one heat exchange tube, and the heat exchange tube is fixed in the cylinder. The device avoids direct contact between water and coal gas, does not produce sewage, and is beneficial to environmental protection. Meanwhile, the cooling effect on the coal gas is more ideal, the moisture in the coal gas is reduced, the conveying capacity of the coal gas is improved, and the energy-saving and consumption-reducing effects are obvious.

Description

Coal gas cooling and recovering device

Technical Field

The utility model relates to a coal gas recovery technical field specifically relates to a coal gas cooling recovery unit.

Background

The high-temperature flue gas discharged from the converter is usually subjected to gas waste heat recovery by using a vaporization cooling flue technology, and the converter gas at 1400-2400 ℃ is cooled to 800-1000 ℃. The main methods for cooling treatment of converter gas at 800-1000 ℃ are divided into two modes: wet dust removal process, i.e., OG process, and dry dust removal process, i.e., LT process.

The OG method comprises the steps that after passing through a vaporization cooling flue, converter gas at 800-1000 ℃ enters a first-stage water overflow fixed venturi tube, a dehydrator is arranged below the converter gas, then enters a second-stage adjustable venturi tube, dust in the gas is mainly removed, and then enters a fan system through a 90-degree elbow dehydrator and a tower type dehydrator to be sent to a user or a diffusion tower. This process is currently less adopted.

The LT method treatment technology is from Germany, and the basic principle is that high-temperature coal gas at 800-1000 ℃ after passing through a vaporization cooling flue is directly sprayed with water for cooling, the temperature of the coal gas is cooled to 150-200 ℃, and then an electric dust removal method is adopted for carrying out flue gas dust removal treatment and recycling the coal gas, and the technology is most used at present.

The OG method and the LT method both begin with the guarantee of production operation and the recovery of converter gas, and do not give consideration to the recovery of sensible heat of flue gas and the improvement of energy utilization rate. The OG method and the LT method basically realize the recovery of chemical energy in converter flue gas by recovering converter coal gas, but the recovery of heat energy is not thorough, the water content of the coal gas is increased due to direct water spraying and cooling and dust removal, environmental pollution and high consumption of water resources and energy are brought while a large amount of heat is wasted, and the improvement of the energy saving and consumption reduction level of the steelmaking converter process is seriously restricted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome the defect that prior art exists, provide a coal gas cooling recovery unit, use the device to carry out indirect cooling to the converter gas, do not produce sewage, do benefit to environmental protection, to the more ideal of coal gas cooling effect, the waste heat recovery efficiency of coal gas is high.

The utility model provides a technical scheme that its technical problem adopted is: the coal gas cooling and recycling device comprises a main body framework, wherein at least one cooling device is arranged in the main body framework, the cooling device comprises a cylinder and at least one heat exchange tube, and the heat exchange tube is fixed in the cylinder.

Further, an upper tube plate, a lower tube plate and a partition plate are arranged in the barrel, the upper tube plate and the lower tube plate are respectively fixed at two ends of the barrel, the partition plate is fixed in the barrel, and the heat exchange tube vertically penetrates through the upper tube plate, the lower tube plate and the partition plate.

Furthermore, the partition plates are semicircular partition plates, and the semicircular partition plates are distributed in the cylinder body in a staggered mode.

Furthermore, the semicircular partition plate is provided with first through holes for the heat exchange tubes to pass through, and the first through holes correspond to the heat exchange tubes one to one.

Further, the baffle is circular baffle, the diameter of circular baffle is the same with the barrel diameter.

Furthermore, a plurality of second through holes for the heat exchange tubes to pass through and a plurality of third through holes for the cooling working medium to flow through are formed in the circular partition plate.

Further, an upper header and a lower header are arranged in the barrel, the upper header is located at the upper end of the barrel, the lower header is located at the lower end of the barrel, the heat exchange tube is vertically fixed in the barrel, two ends of the heat exchange tube are respectively connected with the upper header and the lower header, and the upper header and the lower header are respectively provided with a pipeline with a valve.

Furthermore, a lining is arranged in the barrel, the central axis of the lining and the central axis of the barrel are located on the same straight line, and the heat exchange tubes are vertically arranged on two sides of the lining.

Furthermore, the heat exchange tubes are distributed in a bent shape on the cylinder body.

Further, be equipped with urgent pipeline of diffusing on the main part framework, urgent pipeline one end of diffusing with the lateral wall intercommunication of barrel, its other end is located outside the main part framework, be equipped with explosion-proof valve on the main part framework.

Compared with the prior art, the utility model discloses avoided water and coal gas direct contact, not produced sewage, do benefit to environmental protection. Meanwhile, the cooling effect on the coal gas is more ideal, the moisture in the coal gas is reduced, the conveying capacity of the coal gas is improved, and the energy-saving and consumption-reducing effects are obvious.

Drawings

Fig. 1 is a schematic structural diagram of the connection between the cylinder bodies in the embodiment 1 and the embodiment 2 of the invention;

fig. 2 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 3 is a schematic view showing the distribution of the semicircular partition plate in the cylinder of the embodiment shown in FIG. 2;

FIG. 4 is an enlarged view of the structure at A in FIG. 3;

FIG. 5 is a schematic view of the semicircular partition plate shown in FIG. 3;

fig. 6 is a schematic structural view of embodiment 2 of the present invention;

FIG. 7 is a schematic view showing the distribution of the circular partition plate of the embodiment 2 shown in FIG. 6 in the cylinder;

FIG. 8 is a schematic structural view of the circular partition plate shown in FIG. 7;

fig. 9 is a schematic structural view of embodiment 3 of the present invention;

fig. 10 is a schematic structural view of embodiment 4 of the present invention;

fig. 11 is a schematic view of an installation structure of 4 embodiments of the present invention.

In the figure, the device comprises a main framework 1, a main framework 2, a barrel body 3, a heat exchange tube 4, an upper tube plate 5, a lower tube plate 6, a semicircular partition plate 7, a circular partition plate 8, a first through hole 9, a second through hole 10, a third through hole 11, an emergency evacuation pipeline 12, an explosion-proof valve 13, a gas inlet 14, a gas outlet 15, an upper header 16, a lower header 17, a lining 18, a first pipeline 19, a second pipeline 20 and an ash blowing tube.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1-5, the present embodiment includes a main frame 1, and at least one cooling device is disposed in the main frame 1, and the cooling device includes a cylinder 2 and a plurality of heat exchange tubes 3 fixed in the cylinder 2. The heat exchange tube is characterized in that an upper tube plate 4, a lower tube plate 5 and a semicircular partition plate 6 are arranged in the barrel 2, the upper tube plate 4 and the lower tube plate 5 are respectively fixed at the upper end and the lower end of the barrel 2, the semicircular partition plate 6 is fixed in the barrel, the heat exchange tube 3 vertically penetrates through the upper tube plate 4, the lower tube plate 5 and the semicircular partition plate 6, the semicircular partition plates 6 are distributed in the barrel 2 in a staggered mode, first through holes 8 for the heat exchange tube 3 to penetrate through are formed in the semicircular partition plate 6, and the first through holes 8 correspond to the heat exchange tubes 3 one to one. Because the heat exchange tube 3 is inserted and connected on the upper tube plate 4 and the lower tube plate 5, no gap exists between the heat exchange tube 9 and the upper tube plate and the lower tube plate, coal gas can enter the heat exchange tube 3 after being introduced into the barrel 2 from a coal gas inlet 13 on the main body framework 1, then a cavity can be formed between the area between the upper tube plate and the lower tube plate and the heat exchange tube 3, a cooling working medium is injected into the cavity and can be contacted with the tube wall of the heat exchange tube 3, and heat exchange and cooling are carried out on high-temperature coal gas in the heat exchange tube 3, so that the temperature of the coal gas which is discharged from a coal gas outlet 14 at the tail end of the main body framework 1 is greatly reduced, the semicircular partition plates 6 which are staggered on two sides of the barrel 2 can form bent flow channels in the barrel 6, the cooling working medium flows along.

In this embodiment, the main frame 1 is provided with an emergency release pipeline 11, one end of the emergency release pipeline 11 is communicated with the side wall of the barrel 2, the other end of the emergency release pipeline is located outside the main frame 1, and the main frame 1 is provided with an explosion-proof valve 12. The requirement of explosion-proof pressure relief of the cooling device can be met.

In this embodiment, the inner wall of the cylinder 2 is provided with a fire-resistant heat-insulating layer.

Example 2

As shown in fig. 6 to 8, in this embodiment, the partition plate is a circular partition plate 7, the diameter of the circular partition plate 7 is the same as that of the cylinder 2, and the circular partition plate 7 is provided with a plurality of second through holes 9 through which the heat exchange tubes 3 pass and a plurality of third through holes 10 through which a cooling medium flows.

The rest of the procedure is the same as in example 1

Because the heat exchange tube 3 is inserted on the upper tube plate 4 and the lower tube plate 4, no gap exists between the heat exchange tube 3 and the upper tube plate and between the heat exchange tube 3 and the lower tube plate, the coal gas can enter the heat exchange tube 3 after being introduced into the cylinder body 2 from the coal gas inlet 13 on the main body framework 1, a cooling working medium is injected into the area between the upper tube plate and the lower tube plate, a circular clapboard 7 arranged in the cylinder body 2 is provided with a third through hole 10 for the cooling working medium to flow through besides a second through hole 9 for the heat exchange tube 3 to pass through, the second through hole 9 and the third through hole 10 are distributed at intervals, thus, a certain flow channel can be formed for the cooling working medium outside the heat exchange tube 3, the cooling working medium can flow according to the specified flow channel, the cooling working medium can contact with the outer wall of the heat exchange tube 3 in the flowing process, therefore, the high-temperature coal gas in the heat exchange pipe 3 can be subjected to heat exchange and cooling, so that the temperature of the coal gas discharged from the coal gas outlet 14 at the tail end of the main body framework 1 is greatly reduced.

Example 3

As shown in figure 9 of the drawings,

this embodiment includes main body frame 1, be equipped with at least one cooling device in the main body frame 1, cooling device includes barrel 2 and fixes a plurality of heat exchange tubes 3 in barrel 2, be equipped with header 15 and lower header 16 in the barrel 2, it is located the barrel 2 upper end to go up header 15, header 16 is located the barrel 2 lower extreme down, 3 vertical fixes of heat exchange tube in the

barrel

2, 3 both ends of heat exchange tube are connected respectively go up header 15 and lower header 16, be equipped with inside lining 17 in the barrel 2, the axis of inside lining 17 with the axis of barrel 2 is located same straight line, 3 vertical settings of heat exchange tube are in inside lining 17 both sides. The cooling working medium is concentrated in the upper collecting box 15 and the lower collecting box 16, the upper collecting box and the lower collecting box are connected with the heat exchange tubes 3, the cooling working medium is introduced into the heat exchange tubes 3, the coal-fired furnace gas is introduced from the upper end of the barrel 2 and then flows through gaps between the adjacent heat exchange tubes 3, the high-temperature coal-fired furnace gas flowing through the outer walls of the heat exchange tubes 3 can exchange heat with the cooling working medium in the heat exchange tubes 3, and the temperature of the coal-fired furnace gas flowing out from the lower end of the barrel.

In this embodiment, the upper header 15 is provided with a first pipeline 18 with a valve, the lower header 16 is provided with a second pipeline 19 with a valve, a cooling medium is injected into the upper header 15 and then into the heat exchange tube 3, the high-temperature cooling medium subjected to heat exchange is concentrated in the lower header 161 and then discharged through the second pipeline 19, and the high-temperature cooling medium is injected into the upper header 15 through the first pipeline 18 after cooling, so that the cooling medium can be recycled.

In this embodiment, the ash blowing pipe 20 is arranged above the heat exchange pipe 3 of the barrel 2, so as to prevent the high-temperature coal furnace gas from adhering to the outer wall of the heat exchange pipe 3 and causing blockage.

The inner lining is arranged in the cylinder body, so that the gas flow cross section is reasonably arranged, the converter gas flows to the heat exchange tube 3 to reach a certain flow velocity, and the heat exchange efficiency is ensured.

Example 4

As shown in fig. 10, the heat exchange tubes 3 are distributed in a bent shape in the cylinder 2, and the bent heat exchange tubes 3 increase the contact area between the high-temperature coal-oven gas and the cooling working medium, so that the temperature of the high-temperature coal-oven gas is reduced more quickly.

This example eliminates the liner of example 3 and is otherwise the same as example 3

Various modifications and variations of the present invention may be made by those skilled in the art, and they are within the scope of the present invention provided they are within the scope of the claims and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims

1. The utility model provides a coal gas cooling recovery unit, includes main part framework, its characterized in that: the cooling device comprises a barrel and at least one heat exchange tube, the heat exchange tube is fixed in the barrel, an upper tube plate, a lower tube plate and a partition plate are arranged in the barrel, the upper tube plate and the lower tube plate are fixed at two ends of the barrel respectively, the partition plate is fixed in the barrel, and the heat exchange tube vertically penetrates through the upper tube plate, the lower tube plate and the partition plate.

2. The gas cooling recovery device of claim 1, wherein: the partition plates are semicircular partition plates, and the semicircular partition plates are distributed in the cylinder body in a staggered mode.

3. The gas cooling recovery device of claim 2, wherein: the semicircular partition plate is provided with first through holes for the heat exchange tubes to penetrate through, and the first through holes correspond to the heat exchange tubes one to one.

4. The gas cooling recovery device of claim 1, wherein: the baffle is circular baffle, the diameter of circular baffle with the barrel diameter is the same.

5. The gas cooling recovery device of claim 4, wherein: the circular partition plate is provided with a plurality of second through holes for the heat exchange tubes to pass through and a plurality of third through holes for the cooling working medium to flow through.

6. The gas cooling recovery device of claim 1, wherein: the heat exchange tube is vertically fixed in the barrel, two ends of the heat exchange tube are respectively connected with the upper header and the lower header, and the upper header and the lower header are respectively provided with a pipeline with a valve.

7. The gas cooling recovery device of claim 6, wherein: the heat exchange tube is characterized in that a lining is arranged in the barrel, the central axis of the lining and the central axis of the barrel are located on the same straight line, and the heat exchange tubes are vertically arranged on two sides of the lining.

8. The gas cooling recovery device of claim 6, wherein: the heat exchange tubes are distributed in the cylinder in a bent shape.

9. The gas cooling recovery device of any one of claims 1 to 8, wherein: the emergency release device is characterized in that an emergency release pipeline is arranged on the main body framework, one end of the emergency release pipeline is communicated with the side wall of the barrel, the other end of the emergency release pipeline is located outside the main body framework, and an explosion-proof valve is arranged on the main body framework.