A steam injection blast furnace slag flushing water waste heat recovery device

Abstract

The present invention relates to a steam-injected blast furnace slag flushing water waste heat recovery device, comprising an evaporator, a main condenser, two main injectors, an auxiliary condenser, an auxiliary injector, a blast furnace slag flushing water tank, a heating water tank, a blast furnace slag flushing water inlet pipe, a heating water inlet pipe, a steam inlet pipe and a non-condensable gas discharge pipe, wherein the top of the evaporator is fixedly connected to the blast furnace slag flushing water inlet pipe, and the bottom of the evaporator is fixedly connected to the top of the blast furnace slag flushing water tank. The present invention generates negative pressure through high-speed steam injection, so that the blast furnace slag flushing water evaporates steam, and the blast furnace slag flushing water after cooling is sent back to the blast furnace for circulating slag flushing, and the heat of the steam is transferred to the heating water for heating urban residential buildings. The present invention recovers the waste heat of the blast furnace slag flushing water, reduces the water replenishment amount of the original slag flushing water circulation system, stops the operation of the blast furnace slag flushing water cooling tower and cooling fan, reduces power consumption, and saves energy and water for the process system.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a steam-jet blast furnace slag flushing water waste heat recovery device. Background Art

[0002] With the rapid development of the national economy and the increasing requirements for energy conservation and emission reduction, the country has continuously promoted the dual carbon plan. The waste heat recovery of blast furnace slag water in large and medium-sized steel mills, especially in northern steel mills, can be used for winter urban heating, which can save a lot of energy and reduce carbon emissions. my country's ironmaking production is basically blast furnace production, with a high iron output. Part of the waste heat of blast furnace slag water has not been recovered, and a large amount of waste heat is emitted into the air, affecting the environment and corroding equipment and pipelines. Some blast furnace slag water waste heat systems are highly corrosive, pipeline equipment is often blocked, and the operation effect is not ideal. Summary of the invention

[0003] The purpose of the present invention is to provide a steam injection blast furnace slag flushing water waste heat recovery device to solve the problem that the waste heat is not fully utilized, and a large amount of waste heat is dissipated into the air to affect the environment and corrode equipment and pipelines.

[0004] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0005] The present invention provides a steam-injected blast furnace slag flushing water waste heat recovery device, comprising an evaporator, a main condenser, two main injectors, an auxiliary condenser, an auxiliary injector, a blast furnace slag flushing water tank, a heating water tank, a blast furnace slag flushing water inlet pipe, a heating water inlet pipe, a steam inlet pipe and a non-condensable gas discharge pipe, the top of the evaporator is fixedly connected to the blast furnace slag flushing water inlet pipe, the bottom of the evaporator is fixedly connected to the top of the blast furnace slag flushing water tank, the two main injectors are located between the evaporator and the main condenser, the two ends of the main injectors extend to the inside of the evaporator and the main condenser respectively, the steam inlet pipe is connected to the main injectors in the evaporator, the top of the main condenser is fixedly connected to the heating water inlet pipe, the bottom of the main condenser is fixedly connected to the top of the heating water tank, the auxiliary injector is located between the main condenser and the auxiliary condenser, one end of the auxiliary injector is fixedly connected to the main condenser, the other end of the auxiliary injector is fixedly connected to the auxiliary condenser, the bottom of the auxiliary condenser is fixedly connected to the top of the heating water tank, and the non-condensable gas discharge pipe is arranged at the top of the auxiliary condenser.

[0006] One side of the blast furnace slag flushing water tank is fixedly connected with a blast furnace slag flushing water outlet pipe, and the blast furnace slag flushing water outlet pipe is arranged to facilitate the output of the blast furnace slag flushing water.

[0007] One side of the heating water tank is fixedly connected with a heating water outlet pipe, and the arrangement of the heating water outlet pipe facilitates the output of hot water.

[0008] A support plate is provided at the bottom of the heating water tank, and the top of the support plate is fixedly connected to the bottom of the heating water tank. A first sealing plate and a second sealing plate are provided on the top of the support plate. The first sealing plate and the second sealing plate are both mounted on the outside of the heating water tank, and the first sealing plate is located on one side of the second sealing plate. The arrangement of the first sealing plate and the second sealing plate facilitates the sealing and insulation of the heating water tank to ensure the temperature of the water.

[0009] Positioning rods are fixedly provided on the top of both front and rear sides of the support plate, and multiple limiting plates are fixedly provided on both sides of the positioning rods. The multiple limiting plates are evenly spaced up and down. Through the arrangement of the positioning rods and the limiting plates, it is convenient to limit the first sealing plate and the second sealing plate, thereby improving the stability of the overall structure.

[0010] The first sealing plate and the second sealing plate are both provided with a positioning groove on one side close to the positioning rod, the positioning rod is located between the two positioning grooves, a plurality of limiting grooves are provided on the side of the positioning groove away from the positioning rod, and the plurality of limiting grooves are evenly spaced apart, and an end of the limiting plate away from the positioning rod extends into the limiting groove, and with the cooperation of the positioning groove and the positioning rod and the limiting plate and the limiting groove, the first sealing plate and the second sealing plate can be limited and fixed, thereby improving the stability between the first sealing plate and the second sealing plate.

[0011] The first sealing plate and the second sealing plate are both provided with thermal insulation cotton inside, and the thermal insulation cotton sleeve is arranged on the outside of one end of the heating water tank. The arrangement of the thermal insulation cotton can effectively enhance the thermal insulation effect of the heating water tank.

[0012] The first sealing plate is provided with a first mounting plate on both the front and rear sides. The first mounting plate is fixedly connected to the first sealing plate. The first mounting plate is arranged to facilitate cooperation with the second mounting plate to fix and limit the first sealing plate and the second sealing plate.

[0013] A second mounting plate is provided on both the front and rear sides of the second sealing plate, the second mounting plate is fixedly connected to the second sealing plate, the second mounting plate is located on one side of the first mounting plate, the first mounting plate and the second mounting plate are connected by bolts, and the cooperation between the second mounting plate and the first mounting plate facilitates the fixing of the first sealing plate and the second sealing plate, thereby improving the connection strength between the first sealing plate and the second sealing plate.

[0014] The tops of the first sealing plate and the second sealing plate are both provided with installation grooves, and the two installation grooves are connected. The arrangement of the installation grooves facilitates adaptation to the heating water tank.

[0015] The characteristics and advantages of the steam injection blast furnace slag flushing water waste heat recovery device of the present invention are:

[0016] The present invention generates negative pressure by high-speed steam injection, so that steam evaporates from blast furnace slag flushing water, and the cooled blast furnace slag flushing water is sent back to the blast furnace for slag flushing circulation, and the heat of the steam is transferred to heating water for heating urban residential buildings. The present invention recovers the waste heat of blast furnace slag flushing water, reduces the water replenishment amount of the original slag flushing water circulation system, stops the operation of the blast furnace slag flushing water cooling tower and cooling fan, reduces power consumption, and saves energy and water for the process system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a system diagram of the present invention;

[0018] Figure 2 is a front view of a first sealing plate and a second sealing plate of the present invention;

[0019] Figure 3 is an exploded view of the first sealing plate and the second sealing plate of the present invention;

[0020] Figure 4 is a cross-sectional view of the positioning groove of the present invention;

[0021] Figure 5 The present invention Figure 4 Enlarged view of part A.

[0022] In the figure: 1. evaporator; 2. main condenser; 3. main ejector; 4. auxiliary condenser; 5. auxiliary ejector; 6. blast furnace slag flushing water tank; 7. heating water tank; 8. blast furnace slag flushing water inlet pipe; 9. heating water inlet pipe; 10. steam inlet pipe; 11. non-condensable gas discharge pipe; 12. blast furnace slag flushing water outlet pipe; 13. heating water outlet pipe; 14. support plate; 15. first sealing plate; 16. second sealing plate; 17. positioning rod; 18. limit plate; 19. positioning groove; 20. limit groove; 21. thermal insulation cotton; 22. first mounting plate; 23. second mounting plate; 24. mounting groove. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 5As shown, the present invention provides a steam-injected blast furnace slag-washing water waste heat recovery device, comprising an evaporator 1, a main condenser 2, two main injectors 3, an auxiliary condenser 4, an auxiliary injector 5, a blast furnace slag-washing water tank 6, a heating water tank 7, a blast furnace slag-washing water inlet pipe 8, a heating water inlet pipe 9, a steam inlet pipe 10 and a non-condensable gas discharge pipe 11, the top of the evaporator 1 is fixedly connected with the blast furnace slag-washing water inlet pipe 8, the bottom of the evaporator 1 is fixedly connected with the top of the blast furnace slag-washing water tank 6, the two main injectors 3 are located between the evaporator 1 and the main condenser 2, and the two ends of the main injector 3 extend to Inside the evaporator 1 and the main condenser 2, the steam inlet pipe 10 is connected to the main ejector 3 in the evaporator 1, the top of the main condenser 2 is fixedly connected to the heating water inlet pipe 9, the bottom of the main condenser 2 is fixedly connected to the top of the heating water tank, the auxiliary ejector 5 is located between the main condenser 2 and the auxiliary condenser 4, one end of the auxiliary ejector 5 is fixedly connected to the main condenser 2, the other end of the auxiliary ejector 5 is fixedly connected to the auxiliary condenser 4, the bottom end of the auxiliary condenser 4 is fixedly connected to the top of the heating water tank 7, and the non-condensable gas exhaust pipe 11 is arranged at the top of the auxiliary condenser 4.

[0025] One side of the blast furnace slag flushing water tank 6 is fixedly connected with a blast furnace slag flushing water outlet pipe 12. The blast furnace slag flushing water outlet pipe 12 is arranged to facilitate the output of the blast furnace slag flushing water.

[0026] A heating water outlet pipe 13 is fixedly connected to one side of the heating water tank 7. The arrangement of the heating water outlet pipe 13 facilitates the output of hot water.

[0027] The implementation scenario is as follows: low-pressure steam enters through the steam inlet pipe 10, and is first injected into the main condenser 2 at high speed in the main injector 3, so that a certain negative pressure is formed inside the evaporator 1. High-temperature blast furnace slag water at 70-75°C enters the evaporator 1 through the blast furnace slag water inlet pipe 8, and a part of the blast furnace slag water evaporates to generate low-pressure steam, which is injected into the main condenser 2 by the main injector 3. The temperature of most of the blast furnace slag flushing water is reduced by about 12-15℃ and enters the blast furnace slag flushing water tank 6, and is sent back to the blast furnace slag flushing system for recycling. The heating water return water at 40-50℃ enters the main condenser 2 through the blast furnace heating water inlet pipe 9, and the heating water and steam exchange heat in the main condenser 2. The steam is cooled and condensed into condensed water. The heating water is heated by about 15-20℃ and enters the heating water tank 7, and then is sent to urban residential buildings for heating. After cooling, it is returned for recycling. There is some uncondensed steam and non-condensable gas in the main condenser 2, which is injected into the auxiliary condenser 4 by the auxiliary ejector 5. A part of the heating water enters the auxiliary condenser 4 to cool the steam. The heating water enters the heating water tank 7 after being heated for heating. Some non-condensable gases are discharged into the atmosphere through the non-condensable gas exhaust port. In this way, the waste heat is continuously recycled and the waste heat is utilized to complete the entire process of waste heat recovery.

[0028] Refer to the instruction manual Figure 2-4 In this embodiment, a steam-injected blast furnace slag water waste heat recovery device is provided, a support plate 14 is provided at the bottom of the heating water tank 7, and the top of the support plate 14 is fixedly connected to the bottom of the heating water tank 7, and a first sealing plate 15 and a second sealing plate 16 are provided on the top of the support plate 14, and the first sealing plate 15 and the second sealing plate 16 are both sleeved on the outside of the heating water tank 7, and the first sealing plate 15 is located on one side of the second sealing plate 16. Through the arrangement of the first sealing plate 15 and the second sealing plate 16, it is convenient to seal and insulate the heating water tank 7 to ensure the temperature of the water.

[0029] Positioning rods 17 are fixedly provided on the top of both front and rear sides of the support plate 14, and multiple limiting plates 18 are fixedly provided on both sides of the positioning rod 17. The multiple limiting plates 18 are evenly spaced up and down. The positioning rods 17 and the limiting plates 18 are arranged to facilitate the limiting of the first sealing plate 15 and the second sealing plate 16, thereby improving the stability of the overall structure.

[0030] A positioning groove 19 is formed on one side of the first sealing plate 15 and the second sealing plate 16 close to the positioning rod 17, and the positioning rod 17 is located between the two positioning grooves 19. A plurality of limiting grooves 20 are formed on the side of the positioning groove 19 away from the positioning rod 17, and the plurality of limiting grooves 20 are evenly spaced apart. One end of the limiting plate 18 away from the positioning rod 17 extends into the limiting groove 20. With the cooperation of the positioning groove 19 and the positioning rod 17 and the limiting plate 18 and the limiting groove 20, the first sealing plate 15 and the second sealing plate 16 can be limited and fixed, thereby improving the stability between the first sealing plate 15 and the second sealing plate 16.

[0031] The first sealing plate 15 and the second sealing plate 16 are both provided with heat-insulating cotton 21 , and the heat-insulating cotton 21 is sleeved on the outside of one end of the heating water tank 7 . The provision of the heat-insulating cotton 21 can effectively enhance the heat-insulating effect of the heating water tank 7 .

[0032] The first sealing plate 15 is provided with a first mounting plate 22 on both the front and rear sides. The first mounting plate 22 is fixedly connected to the first sealing plate 15. The first mounting plate 22 is arranged to cooperate with the second mounting plate 23 to fix and limit the first sealing plate 15 and the second sealing plate 16.

[0033] The second sealing plate 16 is provided with a second mounting plate 23 on both the front and rear sides. The second mounting plate 23 is fixedly connected to the second sealing plate 16. The second mounting plate 23 is located on one side of the first mounting plate 22. The first mounting plate 22 and the second mounting plate 23 are connected by bolts. The cooperation between the second mounting plate 23 and the first mounting plate 22 facilitates the fixing of the first sealing plate 15 and the second sealing plate 16, thereby improving the connection strength between the first sealing plate 15 and the second sealing plate 16.

[0034] The first sealing plate 15 and the second sealing plate 16 are both provided with mounting grooves 24 on their tops, and the two mounting grooves 24 are connected to each other. The arrangement of the mounting grooves 24 facilitates matching with the heating water tank 7 .

[0035] The specific implementation scenario is: through the setting of the thermal insulation cotton 21, it is convenient to insulate and seal the heating water tank 7, maintain the temperature of the heating water tank 7, and thus improve the heating effect. At the same time, the first sealing plate 15 and the second sealing plate 16 are connected by the first mounting plate 22, the second mounting plate 23 and bolts, which makes it easy to disassemble the first sealing plate 15 and the second sealing plate 16, and replace and repair the thermal insulation cotton 21 to avoid weakening of the thermal insulation effect.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steam injection blast furnace slag water waste heat recovery device, characterized in that: The invention comprises an evaporator (1), a main condenser (2), two main ejectors (3), an auxiliary condenser (4), an auxiliary ejector (5), a blast furnace slag flushing water tank (6), a heating water tank (7), a blast furnace slag flushing water inlet pipe (8), a heating water inlet pipe (9), a steam inlet pipe (10) and a non-condensable gas discharge pipe (11), wherein the top end of the evaporator (1) is fixedly connected to the blast furnace slag flushing water inlet pipe (8), the bottom end of the evaporator (1) is fixedly connected to the top of the blast furnace slag flushing water tank (6), the two main ejectors (3) are located between the evaporator (1) and the main condenser (2), and the two ends of the main ejectors (3) extend to the evaporator (1) and the main condenser (2) respectively. ), the steam inlet pipe (10) is connected to the main ejector (3) in the evaporator (1), the top end of the main condenser (2) is fixedly connected to the heating water inlet pipe (9), the bottom end of the main condenser (2) is fixedly connected to the top of the heating water tank, the auxiliary ejector (5) is located between the main condenser (2) and the auxiliary condenser (4), one end of the auxiliary ejector (5) is fixedly connected to the main condenser (2), the other end of the auxiliary ejector (5) is fixedly connected to the auxiliary condenser (4), the bottom end of the auxiliary condenser (4) is fixedly connected to the top of the heating water tank (7), and the non-condensable gas discharge pipe (11) is arranged at the top of the auxiliary condenser (4); One side of the blast furnace slag flushing water tank (6) is fixedly connected to a blast furnace slag flushing water outlet pipe (12); One side of the heating water tank (7) is fixedly connected to a heating water outlet pipe (13).

2. A steam injection blast furnace slag flushing water waste heat recovery device according to claim 1, characterized in that: A support plate (14) is provided at the bottom of the heating water tank (7), and a top of the support plate (14) is fixedly connected to the bottom of the heating water tank (7). A first sealing plate (15) and a second sealing plate (16) are provided at the top of the support plate (14). The first sealing plate (15) and the second sealing plate (16) are both sleeved on the outside of the heating water tank (7), and the first sealing plate (15) is located on one side of the second sealing plate (16).

3. A steam injection blast furnace slag flushing water waste heat recovery device according to claim 2, characterized in that: Positioning rods (17) are fixedly provided at the tops of both front and rear sides of the support plate (14), and a plurality of limiting plates (18) are fixedly provided at both sides of the positioning rod (17), with the plurality of limiting plates (18) being evenly spaced up and down.

4. A steam injection blast furnace slag flushing water waste heat recovery device according to claim 3, characterized in that: A positioning groove (19) is formed through the first sealing plate (15) and the second sealing plate (16) on one side close to the positioning rod (17); the positioning rod (17) is located between the two positioning grooves (19); a plurality of limiting grooves (20) are formed on the side of the positioning groove (19) away from the positioning rod (17); the plurality of limiting grooves (20) are evenly spaced; and an end of the limiting plate (18) away from the positioning rod (17) extends into the inside of the limiting groove (20).

5. The steam injection blast furnace slag flushing water waste heat recovery device according to claim 2, characterized in that: The first sealing plate (15) and the second sealing plate (16) are both provided with thermal insulation cotton (21) inside, and the thermal insulation cotton (21) is sleeved on the outside of one end of the heating water tank (7).

6. A steam injection blast furnace slag flushing water waste heat recovery device according to claim 2, characterized in that: A first mounting plate (22) is provided on both the front and rear sides of the first sealing plate (15), and the first mounting plate (22) is fixedly connected to the first sealing plate (15).

7. A steam injection blast furnace slag flushing water waste heat recovery device according to claim 6, characterized in that: A second mounting plate (23) is provided on both the front and rear sides of the second sealing plate (16); the second mounting plate (23) is fixedly connected to the second sealing plate (16); the second mounting plate (23) is located on one side of the first mounting plate (22); the first mounting plate (22) and the second mounting plate (23) are connected via bolts.

8. The steam injection blast furnace slag flushing water waste heat recovery device according to claim 2, characterized in that: The tops of the first sealing plate (15) and the second sealing plate (16) are both provided with mounting grooves (24) extending therethrough, and the two mounting grooves (24) are connected.

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