CN219200092U

CN219200092U - Device for recovering ultrahigh-temperature flue gas waste heat of steel mill

Info

Publication number: CN219200092U
Application number: CN202222675173.6U
Authority: CN
Inventors: 穆世慧; 赵曙光
Original assignee: Beijing Minli Energy Storage Technology Co ltd
Current assignee: Beijing Minli Energy Storage Technology Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-06-16
Anticipated expiration: 2032-10-11

Abstract

The utility model relates to the technical field of waste heat recovery, in particular to a device for recovering waste heat of ultra-high temperature flue gas in a steel mill, which comprises a recovery shell, wherein a moving mechanism and a fixing mechanism are arranged in the recovery shell; the utility model can monitor the gas pressure of the flue gas in the recovery cavity by the gas pressure sensor at any time, timely find whether the equipment leaks, timely remind workers of equipment leakage and inform workers of equipment maintenance by the alarm, drive the filter plate to move up and down by the motor and the threaded shaft, simplify the operation of replacing the filter plate, facilitate the replacement of the filter plate by the workers, and preliminarily filter the flue gas by the installed filter plate so as to avoid the blockage of the pipeline caused by a large amount of dust particles accumulated in the ventilation pipeline after long-time use, and effectively recover most heat in the flue gas by the heat-conducting pipe and the recovery pipe.

Description

Device for recovering ultrahigh-temperature flue gas waste heat of steel mill

Technical Field

The utility model relates to the technical field of waste heat recovery, in particular to a device for recovering waste heat of ultra-high temperature flue gas in a steel mill.

Background

The flue gas waste heat recovery mainly refers to fully utilizing the high-temperature flue gas exhausted from the boiler, thereby further improving the heat efficiency of the boiler, achieving the purpose of saving energy and reducing consumption, and being used for converting the heat carried by the flue gas in a heat exchange mode, but the existing flue gas waste heat recovery heat exchanger has the risk of leakage and is not easy to be detected, when the flue gas waste heat recovery heat exchanger leaks, a large amount of heat can be wasted, the recovered heat is greatly reduced, and after long-term working, dust particles in the flue gas can be accumulated in a pipeline to cause the phenomena of pipeline blockage and the like.

Disclosure of Invention

The utility model aims to provide a device for recovering the ultrahigh-temperature flue gas waste heat of a steel mill, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the device for recovering the ultrahigh-temperature flue gas waste heat of the steel mill comprises a recovery shell, wherein a recovery cavity is formed in the recovery shell, a first air inlet pipe communicated with the recovery cavity is fixedly formed in the top wall of the recovery shell, a filter shell is communicated with the left end of the first air inlet pipe, a connecting pipe is communicated with the left side wall of the filter shell, the left end of the connecting pipe is communicated with a flue gas discharge device of the steel mill, a filter cavity penetrating through the left side wall and the right side wall of the filter shell is formed in the filter shell, a sliding groove penetrating through the bottom wall of the filter shell is formed in the bottom wall of the filter cavity, a filter plate is connected in the sliding groove in a sliding mode, and a moving mechanism for driving the filter plate to move up and down is arranged in the filter cavity;

the left side wall and the right side wall of the filter shell are provided with fixing mechanisms for respectively and fixedly connecting the first air inlet pipe, the connecting pipe and the filter shell.

Preferably, the moving mechanism comprises a servo motor fixedly arranged in the bottom wall of the filter cavity, a threaded shaft extending to the lower part of the bottom wall of the filter shell is arranged at the lower end of the servo motor, a sliding rod is fixedly arranged on the bottom wall of the filter shell, the sliding rod penetrates through the filter plate and is in sliding connection with the filter plate, and the threaded shaft is in threaded connection with the filter plate.

Preferably, the fixing mechanism comprises four connecting pieces arranged on the side wall of the filtering shell, four threaded holes are formed in the connecting pieces at equal intervals, bolts are connected in the threaded holes in a threaded mode, and the first air inlet pipe is fixedly connected with the connecting pipe and the filtering shell through the bolts.

Preferably, the water inlet pipe extending into the recovery cavity is fixedly arranged on the front side wall of the recovery shell, the water inlet valve is arranged on the water inlet pipe, the water outlet pipe extending into the recovery cavity is fixedly arranged on the rear side wall of the recovery shell, and the water outlet valve is arranged on the water outlet pipe outside the rear side wall of the recovery shell.

Preferably, a recovery pipe is installed in the recovery cavity, and two ends of the recovery pipe are respectively communicated with the water inlet pipe and the water outlet pipe in the recovery cavity.

Preferably, the air pressure sensor is installed on the top wall of the recovery cavity, the heat conducting pipe is installed on the top wall of the recovery cavity, the bottom wall of the recovery cavity is communicated with an air outlet pipe penetrating through the bottom wall of the recovery shell, and the lower end of the air outlet pipe is communicated with the waste gas treatment equipment.

Preferably, an alarm is arranged on the top wall of the recovery shell, annular blocks are fixedly arranged on the side wall of the recovery shell, and three brackets are fixedly arranged on the bottom wall of each annular block at equal intervals.

Compared with the prior art, the utility model has the beneficial effects that:

the gas pressure sensor can monitor the gas pressure of the flue gas in the recovery cavity at any time, whether equipment is leaked or not can be timely found, the alarm can timely remind workers that equipment is leaked and inform workers of evacuating and equipment maintenance, the motor and the threaded shaft drive the filter plate to move up and down, the operation of replacing the filter plate is simplified, the filter plate can be replaced conveniently by workers, and after the filter plate can be used for preliminary filtration of the flue gas for a long time, a large number of dust particles are accumulated in the ventilation pipeline to cause pipeline blockage, and most of heat in the flue gas can be effectively recovered through the heat conducting pipe and the recovery pipe.

Drawings

FIG. 1 is a schematic view of the present utility model;

FIG. 2 is a schematic view of the structure of the filter housing of FIG. 1 according to the present utility model;

FIG. 3 is a schematic view of the structure of the filter plate of FIG. 2 according to the present utility model;

FIG. 4 is a schematic view of the moving mechanism of FIG. 2 according to the present utility model;

FIG. 5 is a schematic view showing the internal structure of the recycling cavity of FIG. 1 according to the present utility model;

FIG. 6 is a schematic view of the fixing mechanism of FIG. 1 according to the present utility model;

in the figure:

10. recovering the shell; 11. an annular block; 12. a bracket; 13. a first air inlet pipe; 14. a connecting pipe; 15. a filter housing; 16. a filter chamber; 17. a sliding groove; 18. a servo motor; 19. a threaded shaft; 20. a slide bar; 21. a filter plate; 22. an alarm; 23. a water inlet pipe; 24. a water inlet valve; 25. a water outlet pipe; 26. a water outlet valve; 27. an air outlet pipe; 28. a recovery chamber; 29. a recovery pipe; 30. a heat conduction pipe; 31. an air pressure sensor; 32. a connecting piece; 33. a threaded hole; 34. a bolt; 35. a moving mechanism; 36. a fixing mechanism.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-6, in a first embodiment of the present utility model, a device for recovering waste heat of ultra-high temperature flue gas in a steel mill is provided, which comprises a recovery shell 10, a recovery cavity 28 is provided in the recovery shell 10, a first air inlet pipe 13 communicated with the recovery cavity 28 is fixedly provided on the top wall of the recovery shell 10, a filter shell 15 is communicated with the left end of the first air inlet pipe 13, a connecting pipe 14 is communicated with the left side wall of the filter shell 15, a filter cavity 16 penetrating through the left and right side walls of the filter shell 15 is provided in the filter shell 15, a sliding groove 17 penetrating through the bottom wall of the filter shell 15 is provided on the bottom wall of the filter cavity 16, a filter plate 21 is connected in the sliding groove 17 in a sliding manner, and a moving mechanism 35 for driving the filter plate 21 to move up and down is provided in the filter cavity 16;

the moving mechanism 35 comprises a servo motor 18 fixedly arranged in the bottom wall of the filter cavity 16, a threaded shaft 19 extending to the lower side of the bottom wall of the filter shell 15 is arranged at the lower end of the servo motor 18, a sliding rod 20 is fixedly arranged on the bottom wall of the filter shell 15, the sliding rod 20 penetrates through the filter plate 21 and is in sliding connection with the filter plate 21, and the threaded shaft 19 is in threaded connection with the filter plate 21.

When heat recovery is needed, the left end of the connecting pipe 14 is communicated with a steel mill smoke exhaust device, smoke passes through the connecting pipe 14 and is introduced into the filter cavity 16, the smoke in the filter cavity 16 passes through the filter plate 21, the filter plate 21 removes dust particles doped with larger dust particles in the smoke, the smoke passing through the filter plate 21 is introduced into the recovery cavity 28 through the first air inlet pipe 13, after a period of heat recovery is conducted, the connecting pipe 14 is not introduced with smoke any more, the worker starts the servo motor 18, the servo motor 18 drives the filter plate 21 to move downwards in the sliding groove 17 through the threaded shaft 19, the filter plate 21 is completely moved to the position below the filter shell 15, the worker cleans or replaces the filter plate 21, after the filter plate 21 is cleaned or replaced, the servo motor 18 is reversely started, and the servo motor 18 drives the filter plate 21 to move upwards and move into the filter cavity 16 again.

Example 2

Referring to fig. 1 to 6, in a second embodiment of the present utility model, based on the previous embodiment, specifically, fixing mechanisms 36 for fixedly connecting the first air inlet pipe 13 and the connecting pipe 14 with the filter housing 15 are disposed on the left and right side walls of the filter housing 15, respectively;

the fixing mechanism 36 comprises four connecting pieces 32 arranged on the side wall of the filter shell 15, four threaded holes 33 are formed in the connecting pieces 32 at equal intervals, bolts 34 are connected in the threaded holes 33 in a threaded mode, and the first air inlet pipe 13, the connecting pipe 14 and the filter shell 15 are fixedly connected through the bolts 34.

When the first air inlet pipe 13 and the connecting pipe 14 are required to be respectively communicated with the filter cavity 16, a worker respectively installs the bolts 34 on the front and rear side walls of the first air inlet pipe 13 and the connecting pipe 14 and fixedly connects the first air inlet pipe 13 and the connecting pipe 14 with the left and right side walls of the filter housing 15 by rotating the bolts 34 into the threaded holes 33.

Example 3

Referring to fig. 1-6, in a third embodiment of the present utility model, the two embodiments are based on the above two embodiments, in use, a water inlet pipe 23 extending into the recovery cavity 28 is fixedly arranged on the front side wall of the recovery shell 10, a water inlet valve 24 is installed on the water inlet pipe 23, a water outlet pipe 25 extending into the recovery cavity 28 is fixedly arranged on the rear side wall of the recovery shell 10, and a water outlet valve 26 is installed on the water outlet pipe 25 outside the rear side wall of the recovery shell 10;

a recovery pipe 29 is arranged in the recovery cavity 28, and two ends of the recovery pipe 29 are respectively communicated with the water inlet pipe 23 and the water outlet pipe 25 in the recovery cavity 28;

the top wall of the recovery cavity 28 is provided with an air pressure sensor 31, the top wall of the recovery cavity 28 is provided with a heat conduction pipe 30, the bottom wall of the recovery cavity 28 is communicated with an air outlet pipe 27 penetrating through the bottom wall of the recovery shell 10, and the lower end of the air outlet pipe 27 is communicated with an exhaust gas treatment device;

an alarm 22 is installed on the top wall of the recovery shell 10, an annular block 11 is fixedly arranged on the side wall of the recovery shell 10, and three brackets 12 are fixedly arranged on the bottom wall of the annular block 11 at equal intervals.

Thus, when the water inlet valve 24 is opened, the fresh water to be heated is introduced into the water inlet pipe 23, the fresh water passes through the water inlet pipe 23 and flows into the recovery pipe 29, the ultra-high temperature flue gas is introduced into the connecting pipe 14, the filter plate 21 filters the flue gas passing through the filter cavity 16 to remove impurities and dust particles doped in the flue gas, the flue gas passing through the filter plate 21 passes through the first air inlet pipe 13 and is introduced into the recovery cavity 28, the ultra-high temperature flue gas in the recovery cavity 28 heats the fresh water in the recovery pipe 29, the heat conducting pipe 30 stores part of heat in the flue gas in the heat conducting pipe 30 and continuously heats the fresh water in the recovery pipe 29, the flue gas passing through the recovery cavity 28 is discharged out of the recovery shell 10 through the air outlet pipe 27 and is introduced into corresponding waste gas treatment equipment, the air pressure sensor 31 detects the air pressure of the flue gas in the recovery cavity 28, if the air pressure in the recovery cavity 28 is too high, the alarm 22 is started and sends out an alarm, the heat conducting pipe 29 is heated again, and the fresh water is discharged into the recovery shell 25 through the water outlet pipe 29 and then boiled by the heat conducting pipe 25, and the fresh water is boiled again discharged into the recovery shell 25.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a device for steel mill superhigh temperature flue gas waste heat recovery, includes retrieves shell (10), be equipped with in retrieving shell (10) and retrieve chamber (28), retrieve on shell (10) roof set firmly with retrieve first intake pipe (13) of chamber (28) intercommunication, its characterized in that: the left end of the first air inlet pipe (13) is communicated with a filter shell (15), the left side wall of the filter shell (15) is communicated with a connecting pipe (14), the left end of the connecting pipe (14) is communicated with a steel mill smoke exhaust device, a filter cavity (16) penetrating through the left side wall and the right side wall of the filter shell (15) is arranged in the filter shell (15), a sliding groove (17) penetrating through the bottom wall of the filter shell (15) is arranged on the bottom wall of the filter cavity (16), a filter plate (21) is connected in the sliding groove (17) in a sliding mode, and a moving mechanism (35) driving the filter plate (21) to move up and down is arranged in the filter cavity (16);

the left side wall and the right side wall of the filter shell (15) are provided with fixing mechanisms (36) which respectively and fixedly connect the first air inlet pipe (13), the connecting pipe (14) and the filter shell (15).

2. The device for recovering the ultra-high temperature flue gas waste heat of a steel mill according to claim 1, wherein: the moving mechanism (35) comprises a servo motor (18) fixedly arranged in the bottom wall of the filter cavity (16), a threaded shaft (19) extending to the lower part of the bottom wall of the filter shell (15) is arranged at the lower end of the servo motor (18), a sliding rod (20) is fixedly arranged on the bottom wall of the filter shell (15), the sliding rod (20) penetrates through the filter plate (21) and is in sliding connection with the filter plate (21), and the threaded shaft (19) is in threaded connection with the filter plate (21).

3. The device for recovering the ultra-high temperature flue gas waste heat of a steel mill according to claim 1, wherein: the fixing mechanism (36) comprises four connecting pieces (32) arranged on the side wall of the filter shell (15), four threaded holes (33) are formed in the connecting pieces (32) at equal intervals, bolts (34) are connected with the threaded holes (33) in an internal threaded mode, and the first air inlet pipe (13) and the connecting pipe (14) are fixedly connected with the filter shell (15) through the bolts (34).

4. The device for recovering the ultra-high temperature flue gas waste heat of a steel mill according to claim 1, wherein: the water inlet pipe (23) extending into the recovery cavity (28) is fixedly arranged on the front side wall of the recovery shell (10), the water inlet valve (24) is arranged on the water inlet pipe (23), the water outlet pipe (25) extending into the recovery cavity (28) is fixedly arranged on the rear side wall of the recovery shell (10), and the water outlet valve (26) is arranged on the water outlet pipe (25) outside the rear side wall of the recovery shell (10).

5. The device for recovering the ultra-high temperature flue gas waste heat of the steel mill according to claim 4, wherein: a recovery pipe (29) is arranged in the recovery cavity (28), and two ends of the recovery pipe (29) are respectively communicated with the water inlet pipe (23) and the water outlet pipe (25) in the recovery cavity (28).

6. The device for recovering the ultra-high temperature flue gas waste heat of a steel mill according to claim 1, wherein: the air pressure sensor (31) is installed on the top wall of the recovery cavity (28), the heat conducting pipe (30) is installed on the top wall of the recovery cavity (28), the air outlet pipe (27) penetrating through the bottom wall of the recovery shell (10) is communicated with the bottom wall of the recovery cavity (28), and the lower end of the air outlet pipe (27) is communicated with the waste gas treatment equipment.

7. The device for recovering the ultra-high temperature flue gas waste heat of a steel mill according to claim 1, wherein: an alarm (22) is arranged on the top wall of the recovery shell (10), an annular block (11) is fixedly arranged on the side wall of the recovery shell (10), and three brackets (12) are fixedly arranged on the bottom wall of the annular block (11) at equal intervals.