Cooling water heat utilization device of slag cooling furnace

Abstract

The utility model discloses a slag cooling furnace cooling water heat utilization device, and particularly relates to the field of slag cooling furnace cooling water heat utilization, which comprises a slag cooling furnace, a heat preservation layer is arranged on the outer surface of the slag cooling furnace, an input water pipe of the slag cooling furnace is connected with a second water pump, and an output water pipe of the slag cooling furnace is connected with a first water pump. An output water pipe of the first water pump is connected with a three-way valve. Firstly, hot water subjected to heat exchange is input into the descaling box through the first water pump to be filtered to remove impurities and scale, then the hot water is input into the heat exchange pipe to exchange heat with liquid in the water heat exchange box, and then the hot water is input into the hot air system water heater through the liquid in the water heat exchange box to be heated. The heating speed can be increased, the heating time can be shortened, meanwhile, pipeline blockage caused by heat utilization achieved by directly conveying liquid through other equipment can be avoided, and the heat utilization effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat utilization of cooling water of a cold slag furnace, and more specifically to a device for utilizing heat of cooling water of a cold slag furnace. Background Art

[0002] The cold slag furnace is a device for cooling slag connected to the boiler. The cold slag furnace will emit a lot of heat in the process of cooling the coal slag. Usually, a cooling water heat exchange device is installed on the cold slag furnace to recover the heat, which requires the use of a cold slag furnace cooling water heat utilization device;

[0003] When the refining system operates normally, the heat of its hot water comes from the hot air system water heater, but it cannot fully meet the needs of the refining system. Sometimes steam needs to be added to increase the temperature of the hot water. For this reason, the waste heat of the circulating cooling water of the cold slag furnace is used for the initial heating of the hot water in the refining system, which can effectively save the use of steam in the hot water tank.

[0004] The utility model with Chinese patent application number CN202321649246.2 discloses a circulating cooling water heat exchange device for a cold slag furnace, which specifically relates to the field of heat exchange devices, including a cold slag furnace body, a slag inlet and a support, wherein a slag inlet is provided at the top of one end of the cold slag furnace body, a plurality of supports are provided at the bottom of the cold slag furnace body, a sealing plate is installed on one side of the cold slag furnace body, a slag discharge port is provided on the other side of the cold slag furnace body, a stirring and conveying mechanism is installed inside the cold slag furnace body, a water inlet pipe is provided at the bottom of one side of the cold slag furnace body, and a water outlet pipe is provided at the top of the other side of the cold slag furnace body. The utility model has the advantages of being able to stir the waste slag entering the cold slag furnace, and to convey the waste slag during the stirring process, so that the waste slag can all contact the inner wall of the cold slag furnace, thereby facilitating the circulating water in the water cavity to absorb the heat of the waste slag, thereby improving the heat recovery efficiency and heat recovery rate;

[0005] Then, combined with the drawings in the specification, it can be seen that the heat of the circulating cooling water of the existing cold slag furnace is stored in the liquid after heat exchange. If the liquid is directly transported for heat utilization, it is easy to cause pipe blockage due to impurities or scale generated in the water during long-term use, affecting the heat utilization effect. Utility Model Content

[0006] In order to overcome the above defects of the prior art, the utility model provides a cooling water heat utilization device for a cold slag furnace to solve the problems raised in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical solutions: a cooling water heat utilization device for a cold slag furnace, comprising a cold slag furnace, an outer surface of the cold slag furnace is provided with a heat preservation layer, an input water pipe of the cold slag furnace is connected to a second water pump, an output water pipe of the cold slag furnace is connected to a first water pump, an output water pipe of the first water pump is connected to a three-way valve, and two branch pipes of the three-way valve are respectively connected to a circulating water tank and a descaling tank;

[0008] A water heat exchange box is provided on one side of the descaling box, the input end of the second water pump is connected to the inner cavity of the circulating water box, a heat exchange tube and a stabilizing plate are provided in the middle of the water heat exchange box, the two ends of the heat exchange tube are respectively connected to the inner cavity of the descaling box and the inner cavity of the circulating water tank, a connecting pipe is provided on one side of the water heat exchange box, and an observation window is provided on one side of the circulating water tank;

[0009] A descaling mechanism is arranged in the middle of the descaling box.

[0010] Preferably, the level of the pipeline at the liquid input end of the cold slag furnace is lower than that at the output end, and the level of the pipeline at the output end of the circulating water tank is lower than that of the three-way valve and the connecting pipe between the water heat exchange box and the circulating water tank.

[0011] Preferably, the top end of the heat exchange tube is communicated with the inner cavity of the circulating water tank, and the bottom end of the heat exchange tube is communicated with the inner cavity of the descaling tank.

[0012] Preferably, the connecting pipe on one side of the water heat exchange box is connected to an external hot air system water heater, and is connected to a reboiler of the refining system through the hot air system water heater.

[0013] Preferably, the descaling mechanism comprises a filter frame inserted in the middle of the descaling box, the top of the filter frame is fixedly connected to a sealing top plate, the bottom of the sealing top plate is fixedly connected to a second baffle, and the top two ends of the descaling box are symmetrically fixedly connected to first fixed ear plates.

[0014] Preferably, a first baffle is fixedly connected to the bottom of the inner cavity of the filter frame, a filter mesh plate is fixedly connected to one side of the filter frame, the filter mesh plate corresponds to one end of the heat exchange tube, and the first baffle is located on the side of the second baffle close to the filter mesh plate.

[0015] Preferably, the second fixing ear plates are symmetrically fixedly connected to both sides of the sealing top plate, the top of the first fixing ear plate is fixedly connected to a threaded rod, the threaded rod passes through the second fixing ear plate and is sleeved with a nut.

[0016] Technical effects and advantages of the utility model:

[0017] 1. The utility model firstly inputs the hot water after heat exchange into the descaling box through the first water pump to filter and remove impurities and scale, and then inputs it into the heat exchange tube to exchange heat with the liquid inside the water heat exchange box. Then, the liquid inside the water heat exchange box is input into the water heater of the hot air system for heating, which can improve the heating rate and reduce the heating time. At the same time, it can avoid the blockage of the pipeline caused by directly transporting the liquid to other equipment for heat utilization, thereby improving the heat utilization effect;

[0018] 2. The utility model also improves the stability of the heat exchange tube by setting a stabilizing plate, and the through hole does not affect the liquid flow inside the water heat exchange box, and the second baffle can block the liquid impact entering the descaling box, and the first baffle blocks the liquid to precipitate the liquid and filter it through the filter plate to enter the heat exchange tube, thereby improving the effect of removing impurities and scale, and the threaded rod is passed through the through hole to set the nut, so that the sealing top plate can be fixed and disassembled conveniently, and the filter frame can be inspected, cleaned and used conveniently;

[0019] In summary, through the mutual influence of the above-mentioned multiple effects, it is convenient to remove impurities and scale from the liquid passing through the cold slag furnace for heat exchange, avoid pipe blockage, and exchange heat away for heat utilization, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 This is a schematic structural diagram of the utility model from another angle.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the water heat exchange box of the utility model.

[0023] Figure 4 This is a schematic diagram of the heat exchange tube structure of the utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the stabilizing plate of the utility model.

[0025] Figure 6 It is a schematic diagram of the disassembled structure of the descaling box and the filter frame of the utility model.

[0026] The accompanying drawings are marked as follows: 1. cold slag furnace; 2. insulation layer; 3. circulating water tank; 4. water heat exchange box; 5. first water pump; 6. second water pump; 7. three-way valve; 8. observation window; 9. connecting pipe; 10. heat exchange pipe; 11. stabilizing plate; 12. through hole; 13. descaling box; 14. first fixed ear plate; 15. threaded rod; 16. filter frame; 17. first baffle plate; 18. second baffle plate; 19. sealing top plate; 20. second fixed ear plate; 21. filter mesh plate. DETAILED DESCRIPTION

[0027] 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.

[0028] As attached Figure 1-6 A cooling water heat utilization device for a cold slag furnace shown in the figure comprises a cold slag furnace 1, an outer surface of the cold slag furnace 1 is provided with a heat preservation layer 2, the heat preservation layer 2 improves the temperature maintenance effect of the cooling water inside the cold slag furnace 1, an input water pipe of the cold slag furnace 1 is connected to a second water pump 6, starting the second water pump 6 can conveniently input cooling water into the cold slag furnace 1, an output water pipe of the cold slag furnace 1 is connected to a first water pump 5, conveniently outputting the heated liquid, an output water pipe of the first water pump 5 is connected to a three-way valve 7, two branches of the three-way valve 7 are respectively connected to a circulating water tank 3 and a descaling tank 13, the three-way valve 7 can be used to control the hot water to be input into the descaling tank 13 or into the circulating water tank 3, the descaling tank 13 can filter and precipitate impurities in the input hot water, and play a descaling role;

[0029] A water heat exchange box 4 is provided on one side of the descaling box 13, and the input end of the second water pump 6 is connected to the inner cavity of the circulating water tank 3. The liquid in the circulating water tank 3 can be input into the cooling cavity of the cold slag furnace 1 through the second water pump 6, which is convenient for heat exchange. A heat exchange tube 10 and a stabilizing plate 11 are provided in the middle of the water heat exchange box 4. The stabilizing plate 11 improves the stability of the heat exchange tube 10, and the heat exchange effect is improved through the heat exchange tube 10. The two ends of the heat exchange tube 10 are respectively connected to the inner cavity of the descaling box 13 and the inner cavity of the circulating water tank 3. A connecting pipe 9 is provided on one side of the water heat exchange box 4, and an observation window 8 is provided on one side of the circulating water tank 3. The amount of liquid in the circulating water tank 3 can be conveniently observed through the observation window 8, and the heat output of the heat exchange can be conveniently utilized through the connecting pipe 9;

[0030] A descaling mechanism is provided in the middle of the descaling box 13, which can filter impurities in the liquid to achieve descaling.

[0031] As attached Figure 1 , 2 As shown, the level of the pipeline at the liquid input end of the cold slag furnace 1 is lower than the level of the pipeline at the output end, and the level of the pipeline at the output end of the circulating water tank 3 is lower than the level of the three-way valve 7 and the connecting pipe between the water heat exchange box 4 and the circulating water tank 3.

[0032] As attached Figure 1 , 2As shown in FIG. 3 , the top end of the heat exchange tube 10 is connected with the inner cavity of the circulating water tank 3, and the bottom end of the heat exchange tube 10 is connected with the inner cavity of the descaling tank 13, so that the hot water entering the inner cavity of the descaling tank 13 can enter the interior of the heat exchange tube 10 through the bottom of the heat exchange tube 10, thereby improving the heat exchange effect and allowing the liquid after heat exchange to be input into the interior of the circulating water tank 3 to realize water circulation.

[0033] As attached Figure 1 As shown, the connecting pipe 9 on one side of the water heat exchange box 4 is connected to the external hot air system water heater, and is connected to the reboiler of the refining system through the hot air system water heater, so that the waste heat of the circulating cooling water of the cold slag furnace 1 can be used for the initial heating of the hot water in the refining system, which can effectively save the use of hot water tank steam.

[0034] As attached Figure 1 , 6 As shown, the descaling mechanism includes a filter frame 16 inserted in the middle of the descaling box 13, the top of the filter frame 16 is fixedly connected to a sealing top plate 19, the bottom of the sealing top plate 19 is fixedly connected to a second baffle 18, and the top two ends of the descaling box 13 are symmetrically fixedly connected to first fixed ear plates 14. The top of the descaling box 13 is sealed by the sealing top plate 19, and the liquid entering the descaling box 13 is blocked by the second baffle 18 to reduce the impact, and the sealing top plate 19 and the filter frame 16 are conveniently fixed and installed by the first fixed ear plate 14.

[0035] As attached Figure 1 , 6 As shown, a first baffle 17 is fixedly connected to the bottom of the inner cavity of the filter frame 16, and a filter mesh plate 21 is fixedly connected to one side of the filter frame 16. The filter mesh plate 21 corresponds to one end of the heat exchange tube 10. The first baffle 17 is located on the side of the second baffle 18 close to the filter mesh plate 21. Through the first baffle 17, the incoming liquid can first fall on the side of the first baffle 17 close to the second baffle 18 to block precipitation, and then enter the side close to the filter mesh plate 21 and be filtered through the filter mesh plate 21, thereby removing impurities and preventing clogging.

[0036] As attached Figure 1 , 6 As shown, the second fixed ear plates 20 are symmetrically fixedly connected to the two sides of the sealing top plate 19, and the threaded rod 15 is fixedly connected to the top of the first fixed ear plate 14. The threaded rod 15 passes through the second fixed ear plate 20 and is sleeved with a nut. Through the cooperation of the second fixed ear plate 20 and the first fixed ear plate 14, the sealing top plate 19 is conveniently installed and fixed, and the filter frame 16 is conveniently disassembled and cleaned, thereby improving the use effect.

[0037] Working principle of the utility model: when in use, start the second water pump 6 and the first water pump 5, and open the three-way valve 7 to connect the output end of the first water pump 5 with the inner cavity of the descaling tank 13. At this time, the second water pump 6 inputs the cooling water in the circulating water tank 3 into the cooling tank of the cold slag furnace 1 to absorb the heat generated in the cold slag furnace 1, and inputs the cooling water into the descaling tank 13 through the first water pump 5. The impurities and scale generated in the water are removed through the filtration and precipitation of the first baffle 17 and the filter screen 21. Then, the water enters the interior of the heat exchange tube 10 to exchange heat with the liquid in the water heat exchange tank 4, and the liquid in the heat exchange tube 10 is input into the interior of the circulating water tank 3 to display water circulation.

[0038] At the same time, the high-temperature liquid inside the water heat exchange box 4 will be input into the hot air system water heater through the connecting pipe 9 to continue to heat up, and then go to the refining system reboiler for use, thereby improving the use effect;

[0039] When the interior of the descaling box 13 needs to be cleaned, the nut is removed and the sealing top plate 19 is pulled to remove the filter frame 16 from the interior of the descaling box 13 for cleaning, thereby improving the use effect.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A slag-cooling furnace cooling water heat utilization device, comprising a slag-cooling furnace (1), characterized in that: The outer surface of the slag cooling furnace (1) is provided with an insulation layer (2); the input water pipe of the slag cooling furnace (1) is connected to a second water pump (6); the output water pipe of the slag cooling furnace (1) is connected to a first water pump (5); the output water pipe of the first water pump (5) is connected to a three-way valve (7); and two branch pipes of the three-way valve (7) are respectively connected to a circulating water tank (3) and a descaling tank (13); A water heat exchange box (4) is provided on one side of the descaling box (13); the input end of the second water pump (6) is connected to the inner cavity of the circulating water box (3); a heat exchange tube (10) and a stabilizing plate (11) are provided in the middle of the water heat exchange box (4); both ends of the heat exchange tube (10) are respectively connected to the inner cavity of the descaling box (13) and the inner cavity of the circulating water box (3); a connecting pipe (9) is provided on one side of the water heat exchange box (4); and an observation window (8) is provided on one side of the circulating water box (3); A descaling mechanism is provided in the middle of the descaling box (13).

2. The device for utilizing heat from cooling water of a cold slag furnace according to claim 1, characterized in that: The horizontal height of the pipeline at the liquid input end of the cold slag furnace (1) is lower than the horizontal height of the pipeline at the output end, and the horizontal height of the pipeline at the output end of the circulating water tank (3) is lower than the horizontal height of the three-way valve (7) and the connecting pipe between the water heat exchange box (4) and the circulating water tank (3).

3. The device for utilizing heat from cooling water of a cold slag furnace according to claim 1, characterized in that: The top end of the heat exchange tube (10) is connected to the inner cavity of the circulating water tank (3), and the bottom end of the heat exchange tube (10) is connected to the inner cavity of the descaling tank (13).

4. The device for utilizing heat from cooling water of a cold slag furnace according to claim 1, characterized in that: The connecting pipe (9) on one side of the water heat exchange box (4) is connected to an external hot air system water heater, and is connected to a reboiler of the refining system via the hot air system water heater.

5. The device for utilizing heat from cooling water of a cold slag furnace according to claim 1, characterized in that: The descaling mechanism comprises a filter frame (16) inserted in the middle of the descaling box (13); a sealing top plate (19) is fixedly connected to the top of the filter frame (16); a second baffle (18) is fixedly connected to the bottom of the sealing top plate (19); and first fixed ear plates (14) are symmetrically fixedly connected to the top ends of the descaling box (13).

6. The device for utilizing heat from cooling water of a cold slag furnace according to claim 5, characterized in that: A first baffle (17) is fixedly connected to the bottom of the inner cavity of the filter frame (16); a filter screen plate (21) is fixedly connected to one side of the filter frame (16); the filter screen plate (21) corresponds to one end of the heat exchange tube (10); and the first baffle (17) is located on a side of the second baffle (18) close to the filter screen plate (21).

7. The device for utilizing heat from cooling water of a cold slag furnace according to claim 5, characterized in that: The sealing top plate (19) is symmetrically fixedly connected to the second fixed ear plates (20) on both sides, and the first fixed ear plate (14) is fixedly connected to the top of the threaded rod (15), which passes through the second fixed ear plate (20) and is sleeved with a nut.

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