Coke oven flue gas waste heat efficient utilization device

Abstract

The utility model relates to the technical field of waste heat recovery, in particular to a coke oven flue gas waste heat efficient utilization device which comprises a water tank, a filter tank and a smoke return pipe, a water inlet pipe and a steam pipe are arranged at the upper end of the water tank, a flue is arranged in the water tank, heat exchange fins distributed in an array mode are installed on the inner wall of the flue, and the filter tank is arranged in the water tank. A second smoke inlet pipe is installed at one side end of the filter box, the tail end of the second smoke inlet pipe is installed at the side end of the water tank, the second smoke inlet pipe is communicated with the flue, an installation opening is formed in the front end of the filter box, a cover plate is installed at the position, located at the installation opening, of the front end of the filter box, and a filter plate is installed at the rear end of the cover plate. A dust scraping plate is mounted at the tail end of the filter plate, the smoke return pipe is mounted at the lower end of the water tank and communicated with the flue, and a recovery pipe is mounted at the tail end of the smoke return pipe. The coke oven flue gas waste heat utilization device has the advantages of being capable of filtering dust, efficiently utilizing coke oven flue gas waste heat and preventing waste of flue gas heat.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a device for efficiently utilizing waste heat from coke oven flue gas. Background Art

[0002] A coke oven is a furnace used to refine coke, usually consisting of a carbonization chamber, a combustion chamber, a flue, etc. The coke oven is the core equipment of the coking industry. It produces metallurgical coke by carbonizing coal at high temperatures, which is used in the fields of steel, chemical industry, etc.

[0003] In order to prevent the waste of flue gas heat during coke oven operation, it is necessary to recycle the flue gas. At present, the waste heat of coke oven flue gas is usually used to heat hot water, and the hot water and steam generated can be used elsewhere. When heating hot water, the flue gas passes through the flue, which is short and there is still heat in the exhausted flue gas. The heat in the flue gas cannot be fully utilized, resulting in heat waste. In addition, the flue gas contains dust, which can easily cause coking in the flue, affecting the waste heat recovery. Utility Model Content

[0004] The purpose of the utility model is to provide a coke oven flue gas waste heat efficient utilization device, which has the advantages of filtering dust and efficiently utilizing the coke oven flue gas waste heat, preventing waste of flue gas heat, and solving the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a device for efficiently utilizing waste heat from coke oven flue gas, comprising a water tank, a filter box and a smoke return pipe, a water inlet pipe and a steam pipe being arranged at the upper end of the water tank, the steam pipe being located at one side of the water inlet pipe, a flue being arranged in the water tank, the inner wall of the flue being provided with heat exchange fins distributed in an array, the heat exchange fins being embedded in the water tank, a second smoke inlet pipe being arranged at one side end of the filter box, the end of the second smoke inlet pipe being arranged to the side end of the water tank, and the second smoke inlet pipe being connected to the flue, a mounting port being arranged at the front end of the filter box, a cover plate being arranged at the front end of the filter box at the mounting port, a filter plate being arranged at the rear end of the cover plate, a dust scraper plate being arranged at the end of the filter plate, the return smoke pipe being arranged at the lower end of the water tank, the return smoke pipe being connected to the flue, and a recovery pipe being arranged at the end of the return smoke pipe.

[0006] When using the coke oven flue gas waste heat efficient utilization device of the utility model,

[0007] The coke oven flue gas enters the filter box from the first smoke inlet pipe, and the dust in the smoke can be filtered and intercepted by the filter plate. Then the smoke can enter the flue from the second smoke inlet pipe. In the process of the smoke passing through the flue, the heat in the smoke can be absorbed by the heat exchange fins, and then the heat is introduced into the water tank, so as to heat the water in the water tank. After being discharged from the flue, the smoke can enter the return smoke pipe. The temperature of the exhausted smoke can be detected by the temperature sensor. When the smoke is still at a relatively high temperature, the solenoid valve on the recovery pipe is opened to allow the smoke to re-enter the flue. When the smoke temperature is insufficient, the solenoid valve on the exhaust pipe is opened to discharge the smoke.

[0008] Preferably, a water outlet pipe is installed at a lower position of the side end surface of the water tank, and valves are provided on the water outlet pipe, the water inlet pipe and the steam pipe.

[0009] Preferably, a first smoke inlet pipe is installed at one side end of the filter box away from the second smoke inlet pipe, and the first smoke inlet pipe is connected to the filter box.

[0010] Preferably, the cover plate is provided with mounting holes distributed in an array, the front end of the filter box is provided with threaded holes corresponding to the mounting holes, and bolts are installed in the mounting holes and the inner threads of the threaded holes.

[0011] Preferably, the end of the recovery pipe is connected to the second smoke inlet pipe, a connected smoke exhaust pipe is installed on the recovery pipe, and both the recovery pipe and the smoke exhaust pipe are provided with solenoid valves.

[0012] Preferably, a temperature sensor is installed on the smoke return pipe, and a detection head of the temperature sensor is embedded in the smoke return pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. When the waste heat of coke oven flue gas is utilized, the coke oven flue gas can pass through the filter box, and the dust in the flue gas can be filtered and intercepted by the filter plate to prevent coking in the flue.

[0015] 2. The flue is set longer to ensure full utilization of the heat of the coke oven flue gas. After being discharged from the flue, the flue gas can enter the return flue. The temperature of the discharged flue gas can be detected by the temperature sensor. When the flue gas is still at a relatively high temperature, the solenoid valve on the recovery pipe is opened to allow the flue gas to re-enter the flue to recover heat again. When the flue gas temperature is insufficient, it is directly discharged, so that the waste heat of the coke oven flue gas can be efficiently utilized to prevent the waste of flue gas heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the water tank of the utility model;

[0019] Figure 4 This is a schematic diagram of the filter box structure of the utility model.

[0020] The reference numerals and names in the figures are as follows:

[0021] 101. Water tank; 102. Water inlet pipe; 103. Steam pipe; 104. Water outlet pipe; 105. Flue; 106. Heat exchange fins; 201. Filter box; 202. First smoke inlet pipe; 203. Second smoke inlet pipe; 204. Cover plate; 205. Mounting port; 206. Filter plate; 207. Dust scraper plate; 301. Smoke return pipe; 302. Recovery pipe; 303. Smoke exhaust pipe; 304. Temperature sensor. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example

[0024] See also Figures 1 to 4 The utility model provides an embodiment: a coke oven flue gas waste heat efficient utilization device, comprising:

[0025] A water tank 101, a filter box 201 and a smoke return pipe 301. The upper end of the water tank 101 is provided with a water inlet pipe 102 and a steam pipe 103. The steam pipe 103 is located on one side of the water inlet pipe 102. Water can be added to the water tank 101 through the water inlet pipe 102, and the steam generated by heating can be discharged from the steam pipe 103 for use. A flue 105 is provided in the water tank 101. The inner wall of the flue 105 is provided with heat exchange fins 106 distributed in an array. The heat exchange fins 106 are embedded in the water tank 101. A second smoke inlet pipe 203 is installed on one side of the filter box 201. The end of the second smoke inlet pipe 203 is installed to the side end of the water tank 101, and the second smoke inlet pipe 203 is connected to the side end of the water tank 101. The flue 105 is connected, and a mounting port 205 is provided at the front end of the filter box 201. A cover plate 204 is installed at the front end of the filter box 201 at the mounting port 205. A filter plate 206 is installed at the rear end of the cover plate 204. A dust scraper 207 is installed at the end of the filter plate 206. When the filter plate 206 needs to be cleaned, the bolts on the cover plate 204 are removed, and then the filter plate 206 can be taken out. During the removal process, the dust scraper 207 can scrape out the dust filtered and trapped in the filter box 201. The return smoke pipe 301 is installed at the lower end of the water tank 101, and the return smoke pipe 301 is connected to the flue 105. A recovery pipe 302 is installed at the end of the return smoke pipe 301.

[0026] In this embodiment, the coke oven flue gas enters the filter box 201 from the first smoke inlet pipe 202, and the dust in the flue gas can be filtered and intercepted by the filter plate 206. Then the flue gas can enter the flue 105 from the second smoke inlet pipe 203. In the process of the flue 105, the heat in the flue gas can be absorbed by the heat exchange fins 106, and then the heat is introduced into the water tank 101, so that the water in the water tank 101 can be heated. After the flue gas is discharged from the flue 105, it can enter the return smoke pipe 301. The temperature of the discharged flue gas can be detected by the temperature sensor 304. When the flue gas still has a relatively high temperature, the solenoid valve on the recovery pipe 302 is opened to allow the flue gas to re-enter the flue 105. When the smoke temperature is insufficient, the solenoid valve on the exhaust pipe 303 is opened to discharge the smoke.

[0027] Furthermore,

[0028] A water outlet pipe 104 is installed at the lower position of the side end surface of the water tank 101, and valves are arranged on the water outlet pipe 104, the water inlet pipe 102 and the steam pipe 103. The hot water in the water tank 101 can be discharged through the water outlet pipe 104 for use.

[0029] Furthermore,

[0030] A first smoke inlet pipe 202 is installed at one end of the filter box 201 away from the second smoke inlet pipe 203 , and the first smoke inlet pipe 202 is in communication with the filter box 201 .

[0031] Furthermore,

[0032] The cover plate 204 is provided with mounting holes distributed in an array, and the front end of the filter box 201 is provided with threaded holes corresponding to the mounting holes, and bolts are installed in the mounting holes and the threaded holes. The mounting holes and the threaded holes are provided with bolts to install the cover plate 204.

[0033] Furthermore,

[0034] The end of the recovery pipe 302 is connected to the second smoke inlet pipe 203 , and a connected smoke exhaust pipe 303 is installed on the recovery pipe 302 . Both the recovery pipe 302 and the smoke exhaust pipe 303 are provided with solenoid valves.

[0035] Furthermore,

[0036] A temperature sensor 304 is installed on the smoke return pipe 301 , and a detection head of the temperature sensor 304 is embedded in the smoke return pipe 301 .

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A coke oven flue gas waste heat efficient utilization device, comprising a water tank (101), a filter box (201) and a smoke return pipe (301), characterized in that: A water inlet pipe (102) and a steam pipe (103) are provided at the upper end of the water tank (101), and the steam pipe (103) is located on one side of the water inlet pipe (102). A flue (105) is provided in the water tank (101), and heat exchange fins (106) distributed in an array are installed on the inner wall of the flue (105), and the heat exchange fins (106) are embedded in the water tank (101). A second smoke inlet pipe (203) is installed at one side end of the filter box (201), and the end of the second smoke inlet pipe (203) is installed to the side end of the water tank (101), and the second smoke inlet pipe (203) is installed at the side end of the water tank (101). (203) is connected to the flue (105), the front end of the filter box (201) is provided with a mounting opening (205), the front end of the filter box (201) is provided with a cover plate (204) located at the mounting opening (205), the rear end of the cover plate (204) is provided with a filter plate (206), the end of the filter plate (206) is provided with a dust scraper plate (207), the smoke return pipe (301) is installed at the lower end of the water tank (101), the smoke return pipe (301) is connected to the flue (105), and the end of the smoke return pipe (301) is provided with a recovery pipe (302).

2. The device for efficiently utilizing waste heat from coke oven flue gas according to claim 1, characterized in that: A water outlet pipe (104) is installed at the lower part of the side end surface of the water tank (101), and valves are arranged on the water outlet pipe (104), the water inlet pipe (102) and the steam pipe (103).

3. The device for efficiently utilizing waste heat from coke oven flue gas according to claim 1, characterized in that: A first smoke inlet pipe (202) is installed at one end of the filter box (201) away from the second smoke inlet pipe (203), and the first smoke inlet pipe (202) is connected to the filter box (201).

4. The device for efficiently utilizing waste heat from coke oven flue gas according to claim 1, characterized in that: The cover plate (204) is provided with mounting holes distributed in an array, the front end of the filter box (201) is provided with threaded holes corresponding to the mounting holes, and bolts are threadedly installed in the mounting holes and the threaded holes.

5. The device for efficiently utilizing waste heat from coke oven flue gas according to claim 1, characterized in that: The end of the recovery pipe (302) is connected to the second smoke inlet pipe (203), and a connected smoke exhaust pipe (303) is installed on the recovery pipe (302). Both the recovery pipe (302) and the smoke exhaust pipe (303) are provided with solenoid valves.

6. The device for efficiently utilizing waste heat from coke oven flue gas according to claim 1, characterized in that: A temperature sensor (304) is installed on the smoke return pipe (301), and a detection head of the temperature sensor (304) is embedded in the smoke return pipe (301).

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