Equipment for heating low-temperature steam to generate power by using sintering high-temperature flue gas
By installing a reheater in the sintering high-temperature flue gas pipe of the sintering ring cooler, the sintering waste heat flue gas and low-temperature steam are co-produced and utilized, which solves the problem of ineffective utilization of high-temperature waste gas and low-temperature steam in steel production and realizes energy Efficient utilization and environmental benefits.
Patent Information
- Application Number
- CN202420498455.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-03-14
AI Technical Summary
The high-temperature waste gas and low-temperature steam generated during the steel production process cannot be effectively utilized, resulting in energy waste and environmental pollution.
Design a device that uses a reheater in the sintering high-temperature flue gas pipe of the sintering ring cooler to co-produce and utilize the sintering waste heat flue gas and low-temperature steam. The low-temperature steam is heated through the reheater and combined with the sintering waste heat boiler. The steam is mixed and fed into a steam turbine to generate electricity.
It achieves effective heating of low-temperature steam and efficient use of energy, reduces energy waste, and has significant environmental protection and economic benefits.
Smart Images
Figure CN222376569U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of energy utilization, in particular to a device for generating electricity by heating low-temperature steam using sintering high-temperature flue gas. Background Art
[0002] In steel production, sintering ring coolers are often used to cool sintered ore, and high-temperature exhaust gas is also generated. These high-temperature exhaust gases contain a large amount of waste heat energy. If they cannot be effectively utilized, it will cause energy waste and environmental pollution. On the other hand, a large amount of low-temperature steam is also generated during the production process of steel plants. These steam cannot be directly used for power generation or other high-temperature and high-pressure purposes. If they cannot be effectively utilized, they will also cause energy waste and environmental pollution.
[0003] At present, steel production enterprises usually use waste heat recovery devices to recycle sintering waste heat, but the recovery rate is low; and low-temperature steam cannot be effectively utilized, resulting in energy waste.
[0004] Therefore, a device is needed to utilize high-temperature sintering flue gas to heat low-temperature steam for power generation, so as to make full use of high-temperature exhaust gas and low-temperature steam. Utility Model Content
[0005] The utility model aims to provide a device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas. The device can co-produce low-temperature steam with sintering high-temperature flue gas, make full use of energy, reduce energy waste, and have significant economic and social benefits.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A device for generating electricity by heating low-temperature steam using sintering high-temperature flue gas, comprising a sintering ring cooler, a low-temperature steam source, a sintering waste heat boiler, a steam sub-cylinder, a first steam pipe, a second steam pipe and a steam turbine, wherein the sintering ring cooler is connected to the sintering waste heat boiler through a sintering high-temperature flue gas pipe, a reheater is arranged in the sintering high-temperature flue gas pipe, the inlet end of the reheater is connected to the low-temperature steam source through the first steam pipe, the outlet end of the reheater is connected to the steam sub-cylinder through the second steam pipe, the sintering waste heat boiler is connected to the steam sub-cylinder through the second steam pipe, the steam sub-cylinder is connected to the steam turbine, the low-temperature steam provided by the low-temperature steam source is introduced into the reheater through the first steam pipe, the low-temperature steam is heated by the reheater and then mixed with the steam of the sintering waste heat boiler and merged into the steam sub-cylinder, and the high-temperature steam evenly mixed in the steam sub-cylinder enters the steam turbine for forwarding and generating electricity.
[0008] Furthermore, in the above-mentioned device for generating electricity by heating low-temperature steam using sintering high-temperature flue gas, the low-temperature steam source is a rotary hearth furnace.
[0009] Furthermore, in the above-mentioned device for generating electricity by heating low-temperature steam using sintering high-temperature flue gas, the low-temperature steam is heated to above 330° C. after being heated by the reheater.
[0010] Furthermore, in the above-mentioned equipment for utilizing sintering high-temperature flue gas to heat low-temperature steam for power generation, a flue compensator, a flue reducer and a flue compensator are sequentially arranged between the interface of the sintering waste heat boiler and the sintering high-temperature flue gas pipeline, and the reheater is arranged in the flue reducer.
[0011] Furthermore, in the above-mentioned device for utilizing sintering high-temperature flue gas to heat low-temperature steam for power generation, the flue reducer is composed of a first cone section, a column section and a second cone section connected in sequence, the first cone section is close to the sintering waste heat boiler, and the second cone section is close to the sintering high-temperature flue gas pipe.
[0012] Furthermore, in the above-mentioned device for utilizing sintering high-temperature flue gas to heat low-temperature steam for power generation, the flue reducer is composed of a third cone section and a column section connected in sequence, the third cone section is close to the sintering waste heat boiler, and the column section is close to the sintering high-temperature flue gas pipeline.
[0013] Furthermore, in the above-mentioned device for generating electricity by heating low-temperature steam using sintering high-temperature flue gas, an inlet electric gate valve is provided on the first steam pipe, and an outlet electric gate valve is provided on the second steam pipe. The first steam pipes at both ends of the inlet electric gate valve are also connected through a first bypass pipe, and a first bypass valve is provided on the first bypass pipe. The second steam pipes at both ends of the outlet electric gate valve are also connected through a second bypass pipe, and a second bypass valve is provided on the second bypass pipe.
[0014] Furthermore, in the above-mentioned device for utilizing sintering high-temperature flue gas to heat low-temperature steam for power generation, the sintering high-temperature flue gas pipeline is connected to a ring cooling section of the sintering ring cooler.
[0015] Furthermore, in the above-mentioned device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas, the reheater has an inlet header and an outlet header, and both the inlet header and the outlet header are provided with safety valves, pressure gauges, thermometers and measuring instruments.
[0016] Furthermore, in the above-mentioned device for generating electricity by heating low-temperature steam using sintering high-temperature flue gas, a drain pipeline and a start-up exhaust steam pipeline are arranged on the inlet header and the outlet header.
[0017] Analysis shows that the utility model discloses a device that utilizes sintering high-temperature flue gas to heat low-temperature steam for power generation. By arranging a reheater in the sintering high-temperature flue gas pipeline of the sintering ring cooler, the sintering waste heat flue gas and the low-temperature steam from the rotary hearth furnace are co-produced and utilized, thereby increasing the temperature of the low-quality steam in the steel plant, realizing efficient utilization of energy, and having significant environmental and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:
[0019] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.
[0020] Figure 2 This is a schematic structural diagram of a sintering high-temperature flue gas pipeline according to an embodiment of the utility model.
[0021] Figure 3 This is a schematic structural diagram of a sintering high-temperature flue gas pipeline according to another embodiment of the utility model.
[0022] Figure 4 It is a structural schematic diagram of a reheater according to an embodiment of the utility model.
[0023] Explanation of the reference numerals: 1 low-temperature steam source; 2 sintering waste heat boiler; 3 steam cylinder; 4 first steam pipe; 5 second steam pipe; 6 steam turbine; 7 flue compensator; 8 flue reducer; 9 reheater; 10 inlet electric gate valve; 11 outlet electric gate valve; 12 first bypass pipe; 13 first bypass valve; 14 second bypass pipe; 15 second bypass valve; 16 inlet header; 17 outlet header; 18 drain pipe. DETAILED DESCRIPTION
[0024] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.
[0025] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0026] One or more examples of the utility model are shown in the attached drawings. The detailed description uses numbers and letters to refer to the features in the drawings. Similar or similar marks in the drawings and descriptions have been used to refer to similar or similar parts of the utility model. As used herein, the terms "first", "second", and "third" etc. are used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of individual components.
[0027] like Figures 1 to 4 As shown, according to an embodiment of the utility model, a device for generating electricity by heating low-temperature steam using sintering high-temperature flue gas is provided, such as Figure 1 and Figure 2As shown, it includes a sintering ring cooler, a low-temperature steam source 1, a sintering waste heat boiler 2, a steam sub-cylinder 3, a first steam pipeline 4, a second steam pipeline 5 and a steam turbine 6. The sintering ring cooler is connected to the sintering waste heat boiler 2 through a sintering high-temperature flue gas pipeline. A reheater 9 is arranged in the sintering high-temperature flue gas pipeline. The inlet end of the reheater 9 is connected to the low-temperature steam source 1 through the first steam pipeline 4. The outlet end of the reheater 9 and the sintering waste heat boiler 2 are both connected to the steam sub-cylinder 3 through the second steam pipeline 5. The steam The steam sub-cylinder 3 is connected to the steam turbine 6. The low-temperature steam provided by the low-temperature steam source 1 is introduced into the reheater 9 through the first steam pipe 4. The high-temperature flue gas of the sintering waste heat boiler 2 exchanges heat with the reheater 9 when flowing through the sintering high-temperature flue gas pipe, thereby heating the low-temperature steam flowing through the reheater 9. After the low-temperature steam is heated and heated in the reheater 9, it is mixed with the steam of the sintering waste heat boiler 2 and merged into the steam sub-cylinder 3. The high-temperature steam evenly mixed in the steam sub-cylinder 3 enters the steam turbine 6 for forwarding and power generation. The reheater 9 is made of 12Cr1MoV, assembled into a module in the factory, and shipped as a whole, so that the reheater 9 allows long-term dry burning when the flue gas temperature does not exceed 500°C, ensuring that the reheater 9 is not damaged when the low-temperature steam source 1 discontinuously supplies low-temperature steam. The steam turbine 6 is a steam-injection condensing steam turbine 6 to meet the temperature and flow requirements of the heated steam and achieve effective energy recovery. The sintering waste heat flue gas of the sintering ring cooler is discharged through the sintering high-temperature flue gas pipeline. The reheater 9 absorbs the heat of the sintering waste heat flue gas and heats the low-temperature steam from the low-temperature steam source 1 to heat the low-temperature steam without burning fuel. The heated high-temperature steam drives the supplementary steam condensing steam turbine 6 to generate electricity, thereby realizing energy recovery, improving energy utilization efficiency, reducing costs, and realizing the joint production and utilization of low-quality steam and sintering waste heat flue gas.
[0028] Furthermore, the low-temperature steam source 1 is a rotary hearth furnace.
[0029] Furthermore, the low temperature steam is heated by the reheater 9 and its temperature is raised to above 330°C.
[0030] Furthermore, a flue compensator 7, a flue reducer 8 and a flue compensator 7 are sequentially arranged between the interface of the sintering waste heat boiler 2 and the sintering high-temperature flue gas pipeline, and the reheater 9 is arranged in the flue reducer 8. The flue compensator 7 is used to absorb the thermal expansion and contraction of the sintering high-temperature flue gas pipeline. The flue reducer 8 is arranged according to the actual specifications of the reheater 9. In one embodiment of the utility model, Figure 2 As shown, the flue reducer 8 is composed of a first cone section, a column section and a second cone section connected in sequence, the first cone section is close to the sintering waste heat boiler 2, and the second cone section is close to the sintering high-temperature flue gas pipeline. In another embodiment of the utility model, as shown in FIG. Figure 3 As shown, the flue reducer 8 is composed of a third cone section and a column section connected in sequence, the third cone section is close to the sintering waste heat boiler 2, and the column section is close to the sintering high-temperature flue gas pipeline.
[0031] Furthermore, an inlet electric gate valve 10 is provided on the first steam pipe 4, and an outlet electric gate valve 11 is provided on the second steam pipe 5. The first steam pipe 4 at both ends of the inlet electric gate valve 10 is also connected through a first bypass pipe 12, and a first bypass valve 13 is provided on the first bypass pipe 12. The second steam pipe 5 at both ends of the outlet electric gate valve 11 is also connected through a second bypass pipe 14, and a second bypass valve 15 is provided on the second bypass pipe 14.
[0032] Furthermore, the sintering high-temperature flue gas pipeline is connected to a ring cooling section of the sintering ring cooler.
[0033] Furthermore, if Figure 4 As shown, the reheater 9 has an inlet header 16 and an outlet header 17 , and both the inlet header 16 and the outlet header 17 are provided with a safety valve, a pressure gauge, a thermometer and measuring instruments.
[0034] Furthermore, a drain pipeline 18 and a startup exhaust steam pipeline are arranged on the inlet header 16 and the outlet header 17 .
[0035] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:
[0036] A device for generating electricity by heating low-temperature steam using high-temperature sintering flue gas. A reheater 9 is arranged in the high-temperature sintering flue gas pipeline of the sintering ring cooler. The sintering waste heat flue gas and the low-temperature steam from the rotary hearth furnace are co-produced and utilized, thereby increasing the temperature of the low-quality steam in the steel plant, achieving efficient utilization of energy, and having significant environmental and economic benefits.
[0037] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A device for generating electricity by heating low-temperature steam using high-temperature sintering flue gas, characterized in that: It includes a sintering ring cooler, a low-temperature steam source, a sintering waste heat boiler, a steam cylinder, a first steam pipeline, a second steam pipeline and a steam turbine, wherein: The sintering ring cooler is connected to the sintering waste heat boiler through a sintering high-temperature flue gas pipeline. A reheater is arranged in the sintering high-temperature flue gas pipeline, the inlet end of the reheater is connected to the low-temperature steam source through the first steam pipeline, the outlet end of the reheater is connected to the steam sub-cylinder through the second steam pipeline, the sintering waste heat boiler is connected to the steam sub-cylinder through the second steam pipeline, and the steam sub-cylinder is connected to the steam turbine. The low-temperature steam provided by the low-temperature steam source is introduced into the reheater through the first steam pipe. After being heated by the reheater, the low-temperature steam is mixed with the steam from the sintering waste heat boiler and then merged into the steam sub-cylinder. After being evenly mixed in the steam sub-cylinder, the high-temperature steam enters the steam turbine for forwarding and power generation.
2. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 1 is characterized in that: The low-temperature steam source is a rotary hearth furnace.
3. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 1 is characterized in that: The low-temperature steam is heated to above 330° C. after being heated by the reheater.
4. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 1 is characterized in that: A flue compensator, a flue reducer and a flue compensator are sequentially arranged between the interface of the sintering waste heat boiler and the sintering high-temperature flue gas pipeline, and the reheater is arranged in the flue reducer.
5. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 4 is characterized in that: The flue reducer is composed of a first cone section, a column section and a second cone section connected in sequence, the first cone section is close to the sintering waste heat boiler, and the second cone section is close to the sintering high-temperature flue gas pipeline.
6. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 4 is characterized in that: The flue reducer is composed of a third cone section and a column section connected in sequence, the third cone section is close to the sintering waste heat boiler, and the column section is close to the sintering high-temperature flue gas pipeline.
7. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 1 is characterized in that: The first steam pipeline is provided with an inlet electric gate valve, and the second steam pipeline is provided with an outlet electric gate valve. The first steam pipes at both ends of the inlet electric gate valve are also connected through a first bypass pipe, and the first bypass pipe is provided with a first bypass valve. The second steam pipes at both ends of the outlet electric gate valve are also connected through a second bypass pipe, and a second bypass valve is arranged on the second bypass pipe.
8. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 1 is characterized in that: The sintering high-temperature flue gas pipeline is connected to a ring cooling section of the sintering ring cooler.
9. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 1 is characterized in that: The reheater has an inlet header and an outlet header, and both the inlet header and the outlet header are provided with a safety valve, a pressure gauge, a thermometer and measuring instruments.
10. The device for generating electricity by heating low-temperature steam with sintering high-temperature flue gas according to claim 9, characterized in that: The inlet header and the outlet header are both provided with a drain pipeline and a start-up exhaust steam pipeline.