Device for generating steam by using radiant heat of blast furnace slag and iron runner
By combining the use of molten salt heat exchangers, heat storage tanks, water preheaters and evaporators, the radiant heat from the blast furnace slag and iron ditch is efficiently recovered to generate steam and preheat water, thus solving the problem of low waste heat recovery efficiency in the existing technology and achieving energy conservation and consumption reduction.
Patent Information
- Application Number
- CN202422589812.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-25
AI Technical Summary
In the prior art, the blast furnace waste heat recovery device is simple and has low recovery efficiency. There is a need for a device that can efficiently utilize the radiant heat of the blast furnace slag iron ditch to generate steam.
A combination of molten salt heat exchanger, molten salt heat storage tank, water preheater, evaporator and steam drum is used. The high-temperature molten salt is transported to the high-temperature zone through the molten salt heat exchanger. The high-temperature zone transports the molten salt to the evaporator to heat water to generate steam, and then transports it to the user's steam network through the steam drum. At the same time, the cooled molten salt enters the water preheater to preheat water and then returns to the low-temperature zone for recycling.
The invention realizes efficient recovery of blast furnace slag iron ditch radiation heat, which is used for preheating water and generating steam. It has the advantages of simple structure, convenient recovery, high utilization efficiency, energy saving, consumption reduction and cost reduction.
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Figure CN223345365U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler waste heat recovery and utilization, in particular to a device for generating steam by utilizing blast furnace slag iron channel radiation heat. Background Art
[0002] In the field of metallurgy and ironmaking, the utilization of blast furnace waste heat plays a vital role in energy conservation and consumption reduction. For example, waste heat recovery can be used for heating, power generation, drying blast furnace gas and pulverized coal, and preheating hot blast furnace combustion air and gas. Existing waste heat recovery devices are rudimentary and have low efficiency. Therefore, a device is needed to generate steam using the radiant heat from the blast furnace slag channel. Utility Model Content
[0003] In view of the defects in the prior art, the utility model provides a device for generating steam by utilizing the radiation heat of blast furnace slag iron groove.
[0004] The technical solution adopted by the utility model is: a device for generating steam by utilizing the radiation heat of a blast furnace slag iron ditch, comprising a molten salt heat exchanger, a molten salt heat storage tank, a water preheater, an evaporator and a steam drum, wherein the molten salt heat exchanger is connected to the molten salt heat storage tank, the molten salt heat storage tank is connected to the evaporator, and the evaporator is connected to the water preheater; the steam drum is connected to the evaporator; the molten salt heat storage tank comprises a high-temperature zone and a low-temperature zone, the molten salt heat exchanger is connected to a first molten salt pipeline and a second molten salt pipeline; a molten salt heat exchanger outlet valve and a high-temperature zone inlet valve are provided on the first molten salt pipeline, a molten salt heat exchanger inlet valve and a low-temperature zone outlet valve are provided on the second molten salt pipeline, and the low-temperature zone is provided with a second molten salt pump connected to the second molten salt pipeline.
[0005] In order to better implement the present invention, the high-temperature zone is provided with a first molten salt pump, the first molten salt pump is connected to a third molten salt pipeline, the third molten salt pipeline is connected to the evaporator, and the evaporator inlet valve and the high-temperature zone outlet valve are provided on the third molten salt pipeline.
[0006] To better implement the present invention, the water preheater includes a first molten salt tank and a first water pipeline coordinated with the first molten salt tank. The first molten salt tank is connected to the low-temperature zone through a fifth molten salt pipeline. A water preheater outlet valve and a low-temperature zone inlet valve are provided on the fifth molten salt pipeline; a water preheater water supply valve and a water preheater water outlet valve are provided on the first water pipeline.
[0007] In order to better realize the present invention, a second water pipeline connected to the first water pipeline is also included. The second water pipeline is connected to the steam drum and is equipped with a steam drum water inlet valve.
[0008] To better implement the present utility model, the evaporator includes a second molten salt tank, which is equipped with a third water pipeline connected to the steam drum and a first steam pipeline connected to the steam drum, and a steam drum water outlet valve and an evaporator water inlet valve are provided on the third water pipeline; an evaporator steam outlet valve and a steam drum steam inlet valve are provided on the first steam pipeline; a fourth molten salt pipeline is connected between the first molten salt tank and the second molten salt tank, and a second molten salt tank outlet valve and a first molten salt tank inlet valve are provided on the fourth molten salt pipeline.
[0009] In order to better realize the present invention, a second steam pipeline is connected to the steam drum and is matched with a corresponding steam drum steam outlet valve. The second steam pipeline is used to connect to the user's steam network.
[0010] The beneficial effects of the utility model are embodied in that the device of the utility model utilizes the radiation heat of the blast furnace slag iron ditch to generate steam, through the cooperation of the molten salt heat exchanger, the molten salt heat storage tank, the water preheater, the evaporator, the steam drum, the high temperature zone, the low temperature zone, the first molten salt pipeline, the second molten salt pipeline, the molten salt heat exchanger outlet valve, the high temperature zone inlet valve, the molten salt heat exchanger inlet valve, the low temperature zone outlet valve and the second molten salt pump, etc., the radiation heat of the blast furnace slag iron ditch is heat-exchanged by the molten salt heat exchanger to transport the high temperature molten salt to the high temperature zone, the high temperature zone transports the molten salt to the evaporator to heat water, the steam generated is transported to the user's steam network through the steam drum, and at the same time, the cooled molten salt enters the water preheater to preheat water, and then returns to the low temperature zone, and is transported to the molten salt heat exchanger by the second molten salt pump for recirculation, continuously recycling the radiation heat of the blast furnace slag iron ditch, with the advantages of simple structure, convenient recycling and high utilization efficiency, and can effectively utilize the radiation heat of the slag iron ditch to preheat water and generate steam, thereby saving energy, reducing consumption, reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.
[0012] Figure 1 This is a schematic structural diagram of a device for generating steam by utilizing radiant heat from blast furnace slag and iron channels according to the present invention;
[0013] In the attached figure, 1 is a molten salt heat exchanger, 2 is a molten salt heat storage tank, 3 is a water preheater, 4 is an evaporator, 5 is a steam drum, 6 is a first molten salt pipeline, 7 is a high temperature zone, 8 is a low temperature zone, 9 is a molten salt heat exchanger outlet valve, 10 is a high temperature zone inlet valve, 11 is a first molten salt pump, 12 is a third molten salt pipeline, 13 is a high temperature zone outlet valve, 14 is an evaporator inlet valve, 15 is a second molten salt pipeline, 16 is a molten salt heat exchanger inlet valve, 17 is a low temperature zone outlet valve, 18 is a second molten salt pump, 19 is a fifth molten salt pipeline, 20 is a low temperature zone inlet valve, 21 is a first molten salt pump, 22 is a second molten salt pump, 23 is a first molten salt pump, 24 is a second molten salt pump, 25 is a second molten salt pump, 26 is a second molten salt pump, 27 is a second molten salt pump, 28 is a second molten salt pump, 29 is a second molten salt pump, 30 is a second molten salt pump, 31 is a second molten salt pump, 32 is a second molten salt pump, 33 is a second molten salt pump, 34 is a second molten salt pump, 35 is a second molten salt pump, 36 is a second molten salt pump, 37 is a second molten salt pump, 38 is a second molten salt pump, 39 is a second molten salt pump, 40 is a second molten salt pump, 41 is a second molten salt pump, 42 is a second molten salt pump, 43 is a second molten salt pump, 44 is a 1—water preheater outlet valve, 22—first water pipeline, 23—water preheater water supply valve, 24—fourth molten salt pipeline, 25—first molten salt tank inlet valve, 26—second molten salt tank outlet valve, 27—first steam pipeline, 28—evaporator steam outlet valve, 29—steam drum steam inlet valve, 30—second steam pipeline, 31—steam drum steam outlet valve, 32—second water pipeline, 33—water preheater water outlet valve, 34—steam drum water inlet valve, 35—third water pipeline, 36—steam drum water outlet valve, 37—evaporator water inlet valve. DETAILED DESCRIPTION
[0014] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.
[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of them. Generally, the components of the embodiments of the present disclosure described and shown in the drawings herein can be arranged and designed in various different configurations.
[0016] In the description of this disclosure, it should be noted that the terms "upper" and "inner" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the disclosed product is typically placed when in use. These terms are intended solely to facilitate the description of this disclosure and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.
[0017] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, or electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.
[0018] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.
[0019] Example:
[0020] like Figure 1 As shown, the utility model is a device for generating steam by utilizing the radiation heat of the blast furnace slag iron groove, comprising a molten salt heat exchanger 1, a molten salt heat storage tank 2, a water preheater 3, an evaporator 4 and a steam drum 5, wherein the molten salt heat exchanger 1 is connected to the molten salt heat storage tank 2, the molten salt heat storage tank 2 is connected to the evaporator 4, and the evaporator 4 is connected to the water preheater 3; the steam drum 5 is connected to the evaporator 4; the molten salt heat storage tank 2 includes a high temperature zone 7 and a low temperature zone 8, and the molten salt heat exchanger 1 is connected to a first molten salt pipeline 6 and a second molten salt pipeline 15; a molten salt heat exchanger outlet valve 9 and a high temperature zone inlet valve 10 are provided on the first molten salt pipeline 6, a molten salt heat exchanger inlet valve 16 and a low temperature zone outlet valve 17 are provided on the second molten salt pipeline 15, and the low temperature zone 8 is provided with a second molten salt pump 18 connected to the second molten salt pipeline 15. The utility model discloses a device for generating steam by utilizing the radiation heat of the blast furnace slag iron groove. Through the cooperation of a molten salt heat exchanger 1, a molten salt heat storage tank 2, a water preheater 3, an evaporator 4, a steam drum 5, a high temperature zone 7, a low temperature zone 8, a first molten salt pipeline 6, a second molten salt pipeline 15, a molten salt heat exchanger outlet valve 9, a high temperature zone inlet valve 10, a molten salt heat exchanger inlet valve 16, a low temperature zone outlet valve 17 and a second molten salt pump 18, etc., the radiation heat of the blast furnace slag iron groove is transported to the high temperature molten salt by heat exchange of the molten salt heat exchanger 1. Zone 7, the high-temperature zone 7 transports the molten salt to the evaporator 4 to heat the water, and the steam generated is transported to the user's steam network through the steam drum 5. At the same time, the cooled molten salt enters the water preheater 3 to preheat water, and then returns to the low-temperature zone 8, and is transported to the molten salt heat exchanger 1 through the second molten salt pump 18 for recirculation, continuously recycling the radiation heat of the blast furnace slag and iron ditch. It has the advantages of simple structure, convenient recycling and high utilization efficiency, and can effectively utilize the radiation heat of the slag and iron ditch to preheat water and generate steam, saving energy, reducing consumption, reducing costs and increasing efficiency.
[0021] As a preferred embodiment, the high-temperature zone 7 is equipped with a first molten salt pump 11, which is connected to a third molten salt pipeline 12. The third molten salt pipeline 12 is connected to the evaporator 4. The third molten salt pipeline 12 is provided with an evaporator inlet valve 14 and a high-temperature zone outlet valve 13. With this design, the molten salt in the high-temperature zone is input into the evaporator 4 via the first molten salt pump 11 and the third molten salt pipeline 12.
[0022] As a preferred embodiment, the water preheater 3 includes a first molten salt tank and a first water pipeline 22 coordinated with the first molten salt tank. The first molten salt tank is connected to the low-temperature zone 8 via a fifth molten salt pipeline 19. The fifth molten salt pipeline 19 is provided with a water preheater outlet valve 21 and a low-temperature zone inlet valve 20. The first water pipeline 22 is provided with a water preheater water supply valve 23 and a water preheater outlet valve 33. A second water pipeline 32 connected to the first water pipeline 22 is also included. The second water pipeline 32 is connected to the steam drum 5 and coordinated with a steam drum water inlet valve 34. The evaporator 4 includes a second molten salt tank, which is equipped with a third water pipeline 35 connected to the drum 5 and a first steam pipeline 27 connected to the drum 5. The third water pipeline 35 is provided with a drum water outlet valve 36 and an evaporator water inlet valve 37; the first steam pipeline 27 is provided with an evaporator steam outlet valve 28 and a drum steam inlet valve 29; a fourth molten salt pipeline 24 is connected between the first and second molten salt tanks, and the fourth molten salt pipeline 24 is provided with a second molten salt tank outlet valve 26 and a first molten salt tank inlet valve 25. With this design, normal temperature water enters through the first water pipeline 22 and absorbs heat from the first molten salt tank for preheating. After preheating, it enters the drum 5 through the second water pipeline 32 and then flows into the steam pipe of the evaporator 4 for further heating to generate steam. The generated steam enters the drum 5 through the first steam pipeline 27 and is then transported to the user's steam network. After the second molten salt tank transfers heat to water to generate steam, the molten salt cools down and enters the first molten salt tank from the fourth molten salt pipeline 24, where the heat is used to preheat the water.
[0023] As a preferred embodiment, a second steam pipeline 30 is connected to the steam drum 5 and is equipped with a corresponding steam drum steam outlet valve 31. The second steam pipeline 30 is used to connect to the user steam network. The user steam network is mainly used for heating.
[0024] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.
Claims
1. A device for generating steam using radiant heat from blast furnace slag troughs, characterized in that: The invention comprises a molten salt heat exchanger (1), a molten salt heat storage tank (2), a water preheater (3), an evaporator (4) and a steam drum (5), wherein the molten salt heat exchanger (1) is connected to the molten salt heat storage tank (2), the molten salt heat storage tank (2) is connected to the evaporator (4), and the evaporator (4) is connected to the water preheater (3); the steam drum (5) is connected to the evaporator (4); the molten salt heat storage tank (2) comprises a high temperature zone (7) and a low temperature zone (8); the molten salt heat exchanger (1) is connected to a first molten salt pipeline (6) and a second molten salt pipeline (15); a molten salt heat exchanger outlet valve (9) and a high temperature zone inlet valve (10) are provided on the first molten salt pipeline (6), a molten salt heat exchanger inlet valve (16) and a low temperature zone outlet valve (17) are provided on the second molten salt pipeline (15), and the low temperature zone (8) is provided with a second molten salt pump (18) connected to the second molten salt pipeline (15).
2. The device for generating steam by utilizing radiant heat from blast furnace slag and iron channels according to claim 1, characterized in that: The high-temperature zone (7) is provided with a first molten salt pump (11), the first molten salt pump (11) is connected to a third molten salt pipeline (12), the third molten salt pipeline (12) is connected to the evaporator (4), and the third molten salt pipeline (12) is provided with an evaporator inlet valve (14) and a high-temperature zone outlet valve (13).
3. The device for generating steam by utilizing blast furnace slag iron channel radiation heat according to claim 2, characterized in that: The water preheater (3) includes a first molten salt tank and a first water pipeline (22) matched with the first molten salt tank. The first molten salt tank is connected to the low-temperature zone (8) through a fifth molten salt pipeline (19). A water preheater outlet valve (21) and a low-temperature zone inlet valve (20) are provided on the fifth molten salt pipeline (19); and a water preheater water supply valve (23) and a water preheater water outlet valve (33) are provided on the first water pipeline (22).
4. The device for generating steam by utilizing radiant heat from blast furnace slag and iron channels according to claim 3, characterized in that: It also includes a second water pipeline (32) connected to the first water pipeline (22), the second water pipeline (32) being connected to the steam drum (5) and being equipped with a steam drum water inlet valve (34).
5. The device for generating steam by utilizing radiant heat from blast furnace slag and iron channels according to claim 4, characterized in that: The evaporator (4) includes a second molten salt tank, which is equipped with a third water pipeline (35) connected to the steam drum (5) and a first steam pipeline (27) connected to the steam drum (5), and a steam drum water outlet valve (36) and an evaporator water inlet valve (37) are provided on the third water pipeline (35); an evaporator steam outlet valve (28) and a steam drum steam inlet valve (29) are provided on the first steam pipeline (27); a fourth molten salt pipeline (24) is connected between the first molten salt tank and the second molten salt tank, and a second molten salt tank outlet valve (26) and a first molten salt tank inlet valve (25) are provided on the fourth molten salt pipeline (24).
6. The device for generating steam by utilizing radiant heat from blast furnace slag and iron channels according to claim 5, characterized in that: The steam drum (5) is connected to a second steam pipeline (30) and is equipped with a corresponding steam drum steam outlet valve (31). The second steam pipeline (30) is used to connect to a user steam network.