CN209292376U - Blast furnace grain slag process steam disappears and heat recovery system - Google Patents

Abstract

The utility model discloses a blast furnace grain slag technology steam disappears and heat recovery system, including granulation tower (1), chimney (7), filtering ponds (43), hot water heat transfer unit, cooling tower (44), tank (45) that establish ties in proper order and set up, filtering ponds (43) outer joint has first steam heat exchanger (13), and the top of filtering ponds (43) is equipped with portable steam cover (16). The steam eliminating and heat energy recovery system for the blast furnace granulated slag process can fully recover steam heat energy in the granulation process, can also recover heat energy of slag flushing water and steam of the filter tank, simultaneously reduces the workload of the cooling tower, can also reduce the emission of sulfur-containing steam in the slag treatment process, and really realizes energy conservation, emission reduction and effective cyclic utilization of energy.

Description

A blast furnace water slag process steam whitening and heat recovery system

technical field

The utility model relates to the field of ironmaking in the metallurgical industry, in particular to a steam whitening and heat recovery system for blast furnace water slag process.

Background technique

High-temperature liquid slag (1350°C-1500°C) is produced during blast furnace smelting. Domestically, 700 million tons of molten iron is produced annually, and 250 million tons of high-temperature liquid slag is produced. Relevant research has been carried out for many years at home and abroad, hoping to make full use of the heat of blast furnace slag and realize the recovery and utilization of waste heat.

Chinese patent CN106282445B, published on January 4, 2017, discloses "a device and recovery method for recovering waste heat of blast furnace slag", which uses metal balls to mix with high-temperature liquid slag to obtain blast furnace slag at a temperature of 500°C to 800°C The solid mixture with metal balls, the mixture is broken and separated and the waste heat is recovered by rotating the metal cage. The slag fragments obtained by this method are difficult to realize recycling. The crushing and separation are completed in the cage, and the wear and tear on the metal cage will be very serious under the high temperature state, which will have a serious impact on the life of the equipment and the operating rate of the entire system.

At home and abroad, the sedimentation filtration method (often called the bottom filtration method) water slag process is usually used to treat the slag. Hydraulic slag flushing is carried out in front of the blast furnace, and the slag is crushed by water quenching to become a loose slag-water mixture (commonly known as water slag). The water slag enters the filter tank through the slag flushing ditch, and the liquid water passes through the filter layer in the filter tank Filtration, leaving solid wet slag particles at the bottom of the filter tank, and then grabbing the slag particles by bridge grab cranes and loading them out. The slag particles obtained after water quenching (particle size 0.2mm-3mm) are widely used, and can be used as cement materials, heat insulation fillers, etc., so that the slag can be fully utilized.

As a low-temperature waste heat source, blast furnace slag flushing water (about 70°C to 90°C) has the characteristics of stable temperature and large flow rate. For waste heat utilization of slag flushing water, Chinese patent CN207585372U, published on July 6, 2018, published The "Blast Furnace Slag Washing Water Waste Heat Utilization System" was established. The system leads the slag washing water to the circulation pool through the lifting pump and the drainage pipe. The circulation pool is connected to the heating pump. The water outlet of the heating pump is connected to the sintering water pipeline through the water supply pipe. The concentrated brine discharge pipeline of the power plant is also connected through the first pipeline, and after passing through the heat exchanger, the waste heat of excess water can be fully utilized and injected into the circulation pool for recycling. This system leads the slag washing water from the pool to the circulation pool and then takes other measures to utilize the waste heat, which will lose a lot of heat, which is not conducive to the heat energy recovery of the slag washing water.

Patent CN207121610U, published on March 20, 2018, discloses the "Blast Furnace Slag Washing Steam Waste Heat Recovery and Utilization System". Lithium bromide chilled water unit, finally condenses the steam into condensed water and produces chilled water. The system requires a large amount of additional equipment on the basis of the original water slag system, such as ventilation devices, steam reheating devices, steam heat accumulators, vapor-liquid heat exchangers, etc. The system process is complicated and the equipment investment is high; In the slag flushing water circulation pool, there is not only a large amount of slag flushing water (about 70°C-90°C), but also slag particles obtained after the slag is quenched in water, and some steam (about 60°C-100°C) cannot be captured by the exhaust hood and will The pipeline enters the circulating pool, and the heat of the slag flushing water and steam in the circulating pool has not been fully recovered.

Patent CN101265039B, published on September 17, 2008, discloses "an environment-friendly bottom filtration blast furnace slag treatment equipment and treatment method", which can reduce the amount of slag washing water, reduce water consumption, increase filtration speed, and reduce The pool covers an area and the technology has been used for many years with good results. The water quenching of high-temperature liquid slag is completed by circulating water (about 40°C), and the slag flushing water (about 70°C-90°C) needs to be cooled before it can be used. The pump is directly driven to the cooling tower for cooling, which not only wastes the heat energy of the slag flushing water, but also increases the working load of the cooling tower.

It can be seen from the above analysis that although the existing technology has provided a method for recovering heat energy from the filter pool of the blast furnace slag system, there are various defects to be solved in different degrees and in different aspects. It is necessary to study a new thermal energy recovery method for the filter pool of the blast furnace slag system. Recycling methods for efficient recycling of energy and reduction of air pollution.

In the treatment process of blast furnace slag, there are not only a large amount of high-temperature steam in the granulation process, but also slag flushing water with stable temperature and large flow rate in the filter tank, and steam that exists on the surface of the filter tank for a long time during slag flushing. These slag flushing water and The thermal energy of steam and reducing the emission of sulfur-containing steam to the air are of great significance for energy saving and emission reduction.

Utility model content

In order to recover the heat energy in the blast furnace slag, the utility model provides a blast furnace slag process steam whitening and heat energy recovery system, the blast furnace slag process steam whitening and heat recovery system can fully recover the steam heat energy in the granulation process , can also recover the heat energy of the slag washing water and steam in the filter tank, reduce the workload of the cooling tower, and reduce the emission of sulfur-containing steam in the slag treatment process, truly realizing energy saving and emission reduction and effective recycling of energy.

The technical utility model adopted by the utility model to solve the technical problems is: a blast furnace water slag process steam whitening and heat recovery system, including a granulation tower, a chimney, a filter tank, a hot water heat exchange unit, a cooling The first steam heat exchanger is connected outside the tower, the water storage tank and the filter tank, and a movable steam cover is arranged on the top of the filter tank.

The granulation tower is equipped with a granulator and a second steam heat exchanger. The granulator is located below the high-temperature slag inlet of the granulation tower, and the second steam heat exchanger is located at the upper part of the granulation tower. The high temperature of the granulation tower The slag inlet is located between the second steam heat exchanger and the granulator.

The lower part of the granulation tower is connected to the chimney through the first slag-water mixture pipeline, and the top of the granulation tower is connected to the chimney through a steam pipeline. above the steam heat exchanger.

The chimney is equipped with spraying device, demister and backwashing device in sequence from bottom to top. The connection between the steam pipe and the chimney is located below the spraying device. The spraying device contains long spray guns and Multiple high-pressure nozzles are evenly arranged on the short spray gun, long spray gun and short spray gun.

The lower part of the chimney is connected to the filter tank through the second slag-water mixture pipeline, and the upper part of the filter tank is provided with a steam discharge port, which is connected to the first steam heat exchanger through a steam delivery pipeline, and the steam delivery pipeline is provided with a second Two induced draft fans.

The high-temperature steam discharged from the filter tank can enter the first steam heat exchanger to release heat. After releasing heat, the high-temperature steam can enter the chimney or return to the filter tank. The first steam heat exchanger is connected with a first heat exchange pipeline. The first heat exchange medium in a heat exchange pipeline can absorb heat in the first steam heat exchanger and enter the user pipe network after absorbing heat.

The hot water heat exchange unit includes a first hot water heat exchanger and a second hot water heat exchanger, the first hot water heat exchanger and the second hot water heat exchanger are arranged in series or in parallel, and the first hot water heat exchanger Both the heat exchanger and the second hot water heat exchanger are arranged in the water pump room, and the water pump room is located between the filter pool and the water storage pool.

The high-temperature filtered water flowing out of the filter pool can release heat in the first hot water heat exchanger and the second hot water heat exchanger, which are connected with the second heat exchanger pipeline, the second heat exchange medium in the second heat exchange pipeline can absorb heat in the first hot water heat exchanger and the second hot water heat exchanger and enter the user pipe network after absorbing heat.

The cooling tower is located above the water storage tank. The water storage tank is connected to the granulation tower and the chimney through the water pipeline. The filter water detection and analysis unit is connected to the bottom outlet of the filter tank. The filter water detection and analysis unit can detect the water quality and temperature of the filtered water and traffic.

The beneficial effects of the utility model are:

1. The utility model can fully return the steam in the slag treatment process and the heat energy of the slag flushing water in the filter tank, so as to realize the effective recycling of energy.

2. The utility model proposes a steam treatment measure of first exchanging heat and then spraying, which can reduce the emission of sulfur-containing steam in the slag treatment process and reduce air pollution.

3. The temperature of the high-temperature filtered water is reduced after being processed by the heat exchanger, which can reduce the workload of the cooling tower and achieve efficient cooling.

4. The utility model adopts a non-powered heat exchanger, which has the advantages of low operating cost and high benefit.

5. The utility model detects and analyzes the water quality of the filtered water, detects the temperature and flow rate of the filtered water at the same time, and feeds back all the detection results to the blast furnace central control system in time, so as to optimize the quality and ratio of the raw fuel of the blast furnace, optimize the operation of the blast furnace, It plays an important role in promoting the forward movement of the blast furnace.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model.

Figure 1 is an overall schematic diagram of the steam whitening and heat recovery system of the blast furnace water slag process.

Fig. 2 is a top view of the shower device.

1. Granulation tower; 2. Second steam heat exchanger; 3. Granulator; 4. First induced draft fan; 5. Steam pipeline; 6. First slag-water mixture pipeline; 7. Chimney; 8. Backwash Device; 9. Demister; 10. Spraying device; 11. Second slag-water mixture pipeline; 12. Filter tank steam pipeline; 13. First steam heat exchanger; 14. First electric butterfly valve; 15. First Manual butterfly valve; 16. Movable steam cover; 17. The second manual butterfly valve; 18. The second electric butterfly valve; 19. The first one-way valve; 20. The third manual butterfly valve; 21. The third electric butterfly valve; 22. Thermometer ;23. Flow meter; 24. The fourth manual butterfly valve; 25. Hot water pump; 26. The second one-way valve; 27. The fourth electric butterfly valve; 28. The fifth manual butterfly valve; 29. The first hot water heat exchanger; 30. The second hot water heat exchanger; 31. The upper tower pump; 32. The sixth manual butterfly valve; 33. The seventh manual butterfly valve; 34. The slag flushing pump; 35. The third one-way valve; 36. The fifth electric butterfly valve ;37. Eighth manual butterfly valve; 38. Long spray gun; 39. Short spray gun; 40. High-pressure nozzle; 41. Second induced draft fan; 42. User pipe network; 43. Filter tank; 44. Cooling tower; ; 46. Water pump room.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

A blast furnace water slag process steam whitening and heat recovery system, including a granulation tower 1, a chimney 7, a filter pool 43, a hot water heat exchange unit, a cooling tower 44, and a water storage pool 45 arranged in series in sequence, and the filter pool 43 is externally connected There is a first steam heat exchanger 13, and the top of the filter pool 43 is provided with a movable steam cover 16, as shown in FIG. 1 .

In this embodiment, a granulator 3 and a second steam heat exchanger 2 are arranged in the granulation tower 1, the granulator 3 is located below the high-temperature slag inlet of the granulation tower 1, and the second steam heat exchanger 2 Located at the upper part of the granulation tower 1 , the high-temperature slag inlet of the granulation tower 1 is located between the second steam heat exchanger 2 and the granulator 3 . The granulator is located below the high temperature slag inlet of the granulation tower, and the steam heat exchanger is located above the granulator near the top of the granulation tower.

In this embodiment, the lower part of the granulation tower 1 is connected to the chimney 7 through the first slag-water mixture pipeline 6, and the top of the granulation tower 1 is connected to the chimney 7 through the steam pipeline 5, and the steam pipeline 5 is provided with a first induced draft fan 4. The connection between the steam pipeline 5 and the granulation tower 1 is located above the second steam heat exchanger 2 . The uncondensed steam in the granulation tower is introduced into the chimney by the induced draft fan from the steam pipe on the top side of the granulation tower.

In this embodiment, a spray device 10, a demister 9, and a backwash device 8 are sequentially provided in the chimney 7 from bottom to top. The spray device 10 can be provided with one or more layers, and the connection between the steam pipe 5 and the chimney 7 Located below the spraying device 10, the spraying device 10 contains long spray guns 38 and short spray guns 39 evenly and alternately arranged along the circumference of the chimney 7, and a plurality of high-pressure spray nozzles 40 are evenly arranged on the long spray guns 38 and short spray guns 39, as Figure 2 shows.

In this embodiment, the lower part of the chimney 7 is connected to the filter tank 43 through the second slag-water mixture pipeline 11, and the upper part of the filter tank 43 is provided with a steam discharge port, which is connected to the first steam heat exchanger through a steam delivery pipeline. 13, the steam delivery pipeline is provided with a second induced draft fan 41. A filter tank steam pipeline 12 is also provided between the chimney 7 and the first steam heat exchanger 13 .

A movable steam cover is installed on the top of the filter tank, and the movable steam cover seals the filter tank during slag flushing to avoid the discharge of sulfur-containing steam to the air; after the slag flushing stops, the steam cover is removed to facilitate the slag grasping operation to clean the slag particles in the filter tank. An induced draft fan is installed between the filter tank and the chimney, and the steam on the surface of the filter tank is drawn away and enters the steam heat exchanger.

In this embodiment, the high-temperature steam discharged from the filter pool 43 can enter the first steam heat exchanger 13 to release heat. The device 13 is connected with a first heat exchange pipeline, and the first heat exchange medium (such as normal temperature water or other medium) in the first heat exchange pipeline can absorb heat in the first steam heat exchanger 13 and enter the user pipe after absorbing heat. net42.

When the blast furnace slag is washed, the slag-water mixture carries steam into the filter tank, and a movable steam cover is set on the filter tank, and the steam on the surface of the filter tank and the high-temperature filtered water at the bottom of the filter tank are respectively drawn out during slag flushing, and passed through a steam heat exchanger and hot water. The heat exchange function of the heat exchanger realizes the heat recovery of the filter tank and avoids the discharge of steam to the air. The blast furnace stops flushing slag, and when it is necessary to clean the slag particles in the filter tank, remove the steam cover to facilitate the slag grasping operation.

In this embodiment, the hot water heat exchange unit includes a first hot water heat exchanger 29 and a second hot water heat exchanger 30, and the first hot water heat exchanger 29 is connected in series with the second hot water heat exchanger 30 Or set in parallel (serial connection in FIG. 1 ), the first hot water heat exchanger 29 and the second hot water heat exchanger 30 are both arranged in the water pump room 46 , and the water pump room 46 is located between the filter tank 43 and the water storage tank 45 .

In this embodiment, the high-temperature filtered water flowing out of the filter pool 43 can dissipate heat in the first hot water heat exchanger 29 and the second hot water heat exchanger 30, and the first hot water heat exchanger 29 and the second hot water heat exchanger The water heat exchanger 30 is connected with a second heat exchange line, and the second heat exchange medium (such as normal temperature water or other medium) in the second heat exchange line can exchange heat between the first hot water heat exchanger 29 and the second hot water. The heat is absorbed in the device 30 and enters the user pipe network 42 after absorbing the heat, as shown in FIG. 2 .

In this embodiment, the cooling tower 44 is located above the water storage tank 45, the water storage tank 45 is connected with the granulation tower 1 and the chimney 7 through a water delivery pipeline, and the bottom outlet of the filter tank 43 is connected with a filtered water detection and analysis unit. The water detection and analysis unit can detect the water quality, temperature and flow rate of the filtered water, and the filtered water detection and analysis unit includes a thermometer 22 and a flow meter 23 .

The temperature of high-temperature filtered water is reduced under the action of the heat exchanger to become low-temperature filtered water. The low-temperature filtered water enters the cooling tower for further cooling and then enters the storage tank. It is used as low-temperature slag washing water to realize the recycling of filtered water. At the bottom outlet of the filter tank, the water quality of the filtered water is detected and analyzed, and the temperature and flow of the filtered water are detected at the same time, and all the detection results are fed back to the blast furnace central control system in time to optimize the quality and ratio of raw fuel of the blast furnace and optimize the operation of the blast furnace , to promote the direct operation of the blast furnace.

The working process of the blast furnace water slag process steam whitening and heat energy recovery system is introduced below.

A granulator 3 is installed below the entrance of the high-temperature slag in the granulation tower 1 , the high-temperature slag is granulated under the action of a large amount of high-speed granulation water, and the slag-water mixture falls into the bottom of the granulation tower 1 . The conveying water is introduced into the bottom of the granulation tower 1, and under the action of the conveying water, the slag-water mixture enters the bottom of the chimney 7.

A second steam heat exchanger 2 is arranged above the granulator 3 near the top of the granulation tower 1 , and a steam pipe 5 and a first induced draft fan 4 are arranged on the side of the top of the granulation tower. Under the action of the first induced draft fan 4, the steam (about 80°C-100°C) generated during the slag granulation process moves upward inside the granulation tower, and when the steam passes through the second steam heat exchanger 2, it is introduced into the heat exchange The normal temperature water (about 25°C-35°C) of the tank absorbs a large amount of heat energy and becomes hot water (about 60°C-80°C), and a large amount of steam condenses into water droplets and falls into the bottom of the granulation tower 1 during the heat exchange process. The uncondensed steam enters the chimney 7 from the steam pipe 5 on the top side of the granulation tower 1 .

In the chimney 7, above the outlet of the steam pipeline 5 of the granulation tower, one layer (or multiple layers) of spraying devices 10, demisters 9, and backwashing devices 8 are sequentially arranged.

The spraying device 10 is composed of a plurality of long spray guns 38 and short spray guns 39 uniformly arranged at the same height inside the chimney, and a plurality of high-pressure spray heads 40 are uniformly arranged on the long spray guns and the short spray guns. According to process requirements, multiple levels of long spray guns 38 and short spray guns 39 and their accompanying high-pressure spray heads 40 can be arranged at different heights. After the spray water is ejected from the high-pressure nozzle 40, an atomized state is formed inside the chimney 7, and the atomized spray water evenly covers the inner space of the chimney.

After the uncondensed steam enters the chimney 7, it becomes condensed water under the effect of atomized spray water, and the condensed water falls into the bottom of the chimney 7 together with the spray water. The demister 9 is arranged above the spraying device 10 to eliminate uncondensed steam and small water droplets; the backwashing device 8 regularly backwashes the demister 9 to prevent the demister 9 from being blocked after long-term use.

After the slag-water mixture drawn from the granulation tower 1 enters the chimney 7, it enters the filter pool together with the condensed water and spray water at the bottom of the chimney. A movable steam cover 16 is arranged on the top of the filter tank to seal the steam on the surface of the filter tank; after the slag flushing stops, the movable steam cover 16 is removed to facilitate slag grabbing.

The steam on the surface of the filter tank is drawn out through openings near the top of the filter tank side wall near the chimney 7. A second induced draft fan 41 is arranged outside the opening on the side wall of the filter tank. Under the action of the negative pressure of the second induced draft fan 41 and the seal of the movable steam cover 16 , the steam on the surface of the filter tank is drawn out of the filter tank and enters the first steam heat exchanger 13 .

Normal temperature water (about 25°C-35°C) (or other medium to be heated) enters the user pipe network 42 after being heated by the first steam heat exchanger 13 (about 60°C-70°C), and most of the steam enters the user pipe network 42 in the first steam exchanger 13. Under the action of the heater 13, it condenses into water droplets, and enters the filter tank 43 together with the slag-water mixture. A small part of the steam is not condensed and enters the chimney 7, and becomes water droplets under the action of the spray device 10 in the chimney 7, and falls into the bottom of the chimney 7 through The second slag-water mixture pipeline 11 enters the filter tank 43 .

The first hot water heat exchanger 29 and the second hot water heat exchanger 30 are installed in the water pump house 46, and the two heat exchangers are connected in series, and high-temperature filtered water (about 70°C to 90°C) flows out from the bottom of the filter pool After that, it passes through the first hot water heat exchanger 29 and the second hot water heat exchanger 30 successively, and completes the heating of normal temperature water during the heat exchange process.

Normal temperature water (about 25°C-35°C) becomes hot water (about 60°C-70°C) after being heated by the first hot water heat exchanger 29 and the second hot water heat exchanger 30, and passes through the first one-way valve 19, The second electric butterfly valve 18 and the second manual butterfly valve 17 enter the user pipe network 42 . The high-temperature filtered water enters the first hot water heat exchanger 29 and the second hot water heat exchanger 30 after passing through the hot water pump 25, the second one-way valve 26, the fourth electric butterfly valve 27 and the fifth manual butterfly valve 28. Under the action of the temperature drop, it becomes low-temperature filtered water (about 50°C to 60°C).

The low-temperature filtered water enters the cooling tower through the upper tower pump 31 and the sixth manual butterfly valve 32. After cooling, it becomes cooling water (about 40° C. to 45° C.) and enters the water storage tank 45 for storage. When slag flushing is required, the cooling water is drawn from the bottom of the water storage tank 45, the power is raised by the slag flushing pump 34, and then used as low-temperature slag flushing water, spray water, and delivery water through the third one-way valve 35, the fifth electric butterfly valve 36 and The eighth manual butterfly valve 37 leads to the corresponding position to realize the recycling of filtered water.

Changes in the quality and ratio of blast furnace raw fuel will lead to changes in the composition of blast furnace slag, which in turn will change the quality of filtered water. At the bottom outlet of the filter tank, the water quality of the filtered water flowing out after the filter layer is filtered is detected and analyzed, and a thermometer 22 and a flow meter 23 are installed at the same time to detect the temperature and flow rate of the filtered water, and all the detection results are timely fed back to the blast furnace central control The system plays an important role in optimizing the quality and ratio of blast furnace raw fuel, optimizing blast furnace operation, and promoting blast furnace operation.

The hot water (about 60℃～70℃) heated by the heat exchanger is widely used. After being introduced into the user pipe network, it can be used as a bath shower in the domestic water system, heating in winter, and can also be used as material humidification and preheating in the industrial water system. Wait. The granulated steam of slag and the heat energy of slag washing water and steam in the filter tank are effectively recovered, and the emission of sulfur-containing steam to the air is reduced, which is of great significance for energy saving and emission reduction.

The above is only a specific embodiment of the utility model, and it cannot limit the scope of utility model implementation, so the replacement of its equivalent components, or the equivalent changes and modifications made according to the patent protection scope of the utility model should still belong to areas covered by this patent. In addition, in the utility model, the technical features and the technical features, the technical features and the technical utility models, and the technical utility models and the technical utility models can be freely combined and used.

Claims (9)

1. A kind of bletilla heat reclaiming system 1. blast furnace granulated slag process steam disappears, which is characterized in that the blast furnace granulated slag process steam The bletilla heat reclaiming system that disappears includes the granulation tower (1) for being sequentially connected in series setting, chimney (7), filtering ponds (43), hot water heat exchange list Member, cooling tower (44), tank (45), filtering ponds (43) are externally connected with the first vapor heat exchanger (13), the top of filtering ponds (43) Portion is equipped with removable vapour hood (16).
2. The bletilla heat reclaiming system 2. blast furnace granulated slag process steam according to claim 1 disappears, which is characterized in that granulation tower (1) granulator (3) and the second vapor heat exchanger (2) are provided in, granulator (3) is located at the high-temperature slag entrance of granulation tower (1) Lower section, the second vapor heat exchanger (2) be located at granulation tower (1) top, granulation tower (1) high-temperature slag entrance be located at second steam Between vapour heat exchanger (2) and granulator (3).
3. The bletilla heat reclaiming system 3. blast furnace granulated slag process steam according to claim 2 disappears, which is characterized in that granulation tower (1) lower part is connect by the first slag-water slurry pipeline (6) with chimney (7), passes through jet chimney at the top of granulation tower (1) (5) it is connect with chimney (7), jet chimney (5) is equipped with the first air-introduced machine (4), the connection of jet chimney (5) and granulation tower (1) Place is located at the top of the second vapor heat exchanger (2).
4. The bletilla heat reclaiming system 4. blast furnace granulated slag process steam according to claim 3 disappears, which is characterized in that chimney (7) it is successively arranged spray equipment (10), demister (9) and back purge system (8), jet chimney (5) and chimney from bottom to top in (7) junction is located at the lower section of spray equipment (10), and spray equipment (10) is uniformly alternately arranged containing the circumferential direction along chimney (7) Long spray gun (38) and short spray gun (39), be evenly arranged multiple high-pressure nozzles (40) on long spray gun (38) and short spray gun (39).
5. The bletilla heat reclaiming system 5. blast furnace granulated slag process steam according to claim 1 disappears, which is characterized in that chimney (7) lower part is connect by the second slag-water slurry pipeline (11) with filtering ponds (43), and the top of filtering ponds (43) is equipped with steam Discharge outlet, which is connect by steam pipeline with the first vapor heat exchanger (13), on the steam pipeline Equipped with the second air-introduced machine (41).
6. The bletilla heat reclaiming system 6. blast furnace granulated slag process steam according to claim 5 disappears, which is characterized in that filtering ponds (43) high-temperature steam being discharged is able to enter heat release in the first vapor heat exchanger (13), which is able to enter after heat release Chimney (7) is back in filtering ponds (43), and the first vapor heat exchanger (13) is connected with the first heat exchange pipeline, first heat exchanger tube The first heat transferring medium in line can absorb heat and in laggard access customer pipe network (42) of absorbing heat in the first vapor heat exchanger (13).
7. The bletilla heat reclaiming system 7. blast furnace granulated slag process steam according to claim 1 disappears, which is characterized in that the heat Water heat exchange unit contains the first hot water heat exchanger (29) and the second hot water heat exchanger (30), the first hot water heat exchanger (29) and second The setting of hot water heat exchanger (30) serial or parallel connection, the first hot water heat exchanger (29) and the second hot water heat exchanger (30) are all set in water In pump house (46), pump house (46) is located between filtering ponds (43) and tank (45).
8. The bletilla heat reclaiming system 8. blast furnace granulated slag process steam according to claim 7 disappears, which is characterized in that filtering ponds (43) the high temperature filtration water energy flowed out in reaches the heat release in the first hot water heat exchanger (29) and the second hot water heat exchanger (30), and first Hot water heat exchanger (29) and the second hot water heat exchanger (30) are connected with the second heat exchange pipeline, and second in the second heat exchange pipeline is changed Thermal medium can absorb heat and in the laggard access customer pipe that absorbs heat in the first hot water heat exchanger (29) and the second hot water heat exchanger (30) Net (42).
9. The bletilla heat reclaiming system 9. blast furnace granulated slag process steam according to claim 1 disappears, which is characterized in that cooling tower (44) it is located at the top of tank (45), tank (45) is connect with granulation tower (1) and chimney (7) by waterline, filtered The outlet at bottom in pond (43) was externally connected with drainage and tests and analyzes unit, this is crossed drainage detection and analysis unit and was able to detect drainage Water quality, temperature and flow.