High-temperature steel coil waste heat recovery power generation device

Abstract

The utility model provides a high-temperature steel coil waste heat recovery power generation device, and belongs to the technical field of high-temperature steel plate waste heat recovery. A first steel coil heat exchange device and a second steel coil heat exchange device are arranged at the bottom of a cylinder and are respectively fixed on a platform through gravity type fixing devices, a third steel coil heat exchange device and a fourth steel coil heat exchange device are arranged on the upper side of the cylinder and are respectively fixed on a steel structure through a first hydraulic type opening device, and the steel structure is fixed on the platform. A main output or input pipeline of the heat exchange coil is connected to a temperature control four-way reversing valve, and four output or input pipelines of the temperature control four-way reversing valve are connected with a high-temperature energy storage heat exchange device, a secondary-high-temperature energy storage heat exchange device, a medium-temperature energy storage heat exchange device and a low-temperature energy storage heat exchange device respectively. According to the high-temperature steel coil waste heat recovery power generation device, waste heat of the high-temperature steel coil is utilized, the waste heat recovery efficiency is high, fuel does not need to be supplemented, greenhouse gas emission is solved, the self-generating capacity of enterprises is increased, energy is saved, and air pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery of high-temperature steel coils, and in particular to a waste heat recovery power generation device for high-temperature steel coils. Background Art

[0002] In order to curb the adverse effects of excessive carbon emissions on the global climate, my country proposed to implement a "dual control" action on total energy consumption and intensity at the Fifth Plenary Session of the 18th Central Committee in 2015. At the 75th United Nations General Assembly in 2020, the goal of reaching carbon peak by 2030 and carbon neutrality by 2060 was proposed. As the world's largest energy consumer and energy shortage country, my country's steel industry is a major energy consumer in the industrial field and one of the industries with the greatest potential for energy conservation and emission reduction in my country. The steel industry has become a key and difficult area for energy conservation and emission reduction in the whole society. If the energy conservation and emission reduction in the steel industry are effective, it will also make a huge contribution to energy conservation and emission reduction in the whole society. It has become an industry consensus to seize the initiative of this round of energy revolution, develop energy-saving processes, and apply waste heat recovery technology.

[0003] The state has issued the "Standardized Conditions for Production and Operation of the Steel Industry", which sets specific requirements for steel enterprises in terms of environmental protection, energy consumption and resource recycling, process equipment, etc. It clearly states that enterprises that do not meet the standardized conditions must make rectifications in accordance with the standardized conditions, and enterprises that still fail to meet the requirements after rectification should gradually withdraw from steel production.

[0004] National environmental protection laws and regulations are becoming more stringent, and the task of energy conservation and emission reduction is becoming more arduous. Among the key development directions of the steel industry, those related to energy conservation and emission reduction account for the majority.

[0005] At present, the recovery rate of waste heat and waste energy in the steel industry is quite low. If the waste heat is reasonably utilized, by effectively recovering the heat loss in production and using the waste heat for heating or power generation, it can not only save energy, reduce operating costs, and improve corporate benefits, but also protect the environment and reduce thermal pollution. Utility Model Content

[0006] The main purpose of the utility model is to provide a high-temperature steel coil waste heat recovery power generation device, which solves the problem that the domestic high-temperature steel plate is intermittent waste heat and cannot be directly utilized. If the waste heat of the high-temperature steel plate is not recovered, it will not only cause a large amount of greenhouse gas emissions and waste of resources, but also reduce production efficiency. This technology realizes the problem of intermittent waste heat power generation in an orderly and controllable manner, and is a real green electricity technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A high-temperature steel coil waste heat recovery power generation device, the high-temperature steel coil waste heat recovery power generation device comprises a steel structure, a platform, a steel coil heat exchange device 1, a steel coil heat exchange device 2, a gravity-type fixing device, a steel coil heat exchange device 3, a hydraulic opening device 1, a steel coil heat exchange device 4, a fixing device, a hydraulic opening device 2, an end heat exchange device, a temperature-controlled four-way reversing valve, an electric switch valve, a high-temperature energy storage heat exchange device, a sub-high-temperature energy storage heat exchange device, a medium-temperature energy storage heat exchange device, a low-temperature energy storage heat exchange device, a primary economizer, a secondary economizer, an evaporator, a superheater and a heat exchange coil,

[0009] Heat exchange coils are arranged on the inner sides of the steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3, the steel coil heat exchange device 4 and the end heat exchange device. The steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3 and the steel coil heat exchange device 4 form a cylinder. The front and rear sides of the cylinder are provided with end heat exchange devices and are fixed to the platform through the hydraulic opening device 2. The steel coil is placed in the cylinder. The steel coil heat exchange device 1 and the steel coil heat exchange device 2 are arranged at the bottom of the cylinder and are respectively fixed to the platform through the gravity fixing device. The steel coil heat exchange device 3 and the steel coil heat exchange device 4 are arranged on the upper side of the cylinder and are respectively fixed to the steel structure through the hydraulic opening device 1. The steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3 and the steel coil heat exchange device 4 are fixed to the steel structure on both sides through the fixing device, and the steel structure is fixed to the platform.

[0010] The total output pipeline of the heat exchange coil is connected to the temperature-controlled four-way reversing valve, and the four output pipelines of the temperature-controlled four-way reversing valve are respectively connected to the high-temperature energy storage heat exchange device, the sub-high-temperature energy storage heat exchange device, the medium-temperature energy storage heat exchange device and the low-temperature energy storage heat exchange device. The high-temperature energy storage heat exchange device, the sub-high-temperature energy storage heat exchange device, the medium-temperature energy storage heat exchange device and the low-temperature energy storage heat exchange device are sequentially provided with a superheater, an evaporator, a secondary economizer and a primary economizer, and the output pipelines of the high-temperature energy storage heat exchange device, the sub-high-temperature energy storage heat exchange device, the medium-temperature energy storage heat exchange device and the low-temperature energy storage heat exchange device are connected to the input pipeline of the temperature-controlled four-way reversing valve, and the output pipeline of the temperature-controlled four-way reversing valve is connected to the total input pipeline of the heat exchange coil;

[0011] The feed water passes through the primary economizer, secondary economizer, evaporator and superheater in sequence to output superheated steam.

[0012] The utility model discloses a high-temperature steel coil waste heat recovery power generation device, wherein the steel coil heat exchange device one, the steel coil heat exchange device two, the steel coil heat exchange device three and the steel coil heat exchange device four form a circumference, and the fixing device is fixed on the steel coil heat exchange device one and the steel coil heat exchange device two.

[0013] The utility model discloses a high-temperature steel coil waste heat recovery power generation device, wherein the medium in the heat exchange coil is heat transfer oil.

[0014] The utility model discloses a high-temperature steel coil waste heat recovery power generation device, wherein the temperature ranges of the high-temperature energy storage heat exchange device, the sub-high-temperature energy storage heat exchange device, the medium-temperature energy storage heat exchange device and the low-temperature energy storage heat exchange device are 400 degrees to 360 degrees, 300 degrees to 260 degrees, 200 degrees to 150 degrees and 100 degrees to 80 degrees respectively.

[0015] The utility model discloses a high-temperature steel coil waste heat recovery power generation device, wherein the steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3, the steel coil heat exchange device 4 and the heat exchange coil inside the end heat exchange device are connected together and connected to the temperature control four-way reversing valve through the main input pipeline and the main output pipeline.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Energy saving effect:

[0018] The resource utilized by the high-temperature steel coil waste heat recovery power generation device of the utility model is the waste heat of the high-temperature steel coil. The waste heat recovery efficiency is high and no fuel replenishment is required. It solves the problem of greenhouse gas emissions, increases the company's self-generated electricity, saves energy, and reduces air pollution. This solution complies with national industrial policies and is an environmentally friendly, energy-saving and carbon-emission-reducing circular economy waste heat power generation technology that meets the requirements of sustainable development. It has very significant economic benefits and also meets the country's requirements for energy conservation and emission reduction in the steel industry.

[0019] 2. Benefit Analysis

[0020] Calculation of power generation from waste heat recovery of high temperature steel coils

[0021] The steel coil output is 375 tons per hour, and the steel plate temperature drops from 600℃ to 80℃. Calculate the power generation from the steel plate waste heat.

[0022] Waste heat of steel coil per hour: 375×(600-80)×1000×0.46=8.97×107KJ / h

[0023] P = 1.6MPa t = 330℃ superheated steam enthalpy 3100KJ / Kg

[0024] The superheated steam production per hour from the waste heat of the steel coil is 8.97×107÷3100=28.9t / h BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a high-temperature steel coil waste heat recovery power generation device of the utility model;

[0026] Figure 2 for Figure 1 B view in the figure;

[0027] Figure 3 for Figure 1 AA section view.

[0028] In the figure: 1 is a steel structure; 2 is a platform; 3 is a steel coil heat exchange device 1; 4 is a steel coil heat exchange device 2; 5 is a gravity-type fixing device; 6 is a steel coil heat exchange device 3; 7 is a hydraulic opening device 1; 8 is a steel coil heat exchange device 4; 9 is a fixing device; 10 is a hydraulic opening device 2; 11 is an end heat exchange device; 12 is a temperature-controlled four-way reversing valve; 13 is an electric switch valve; 14 is a high-temperature energy storage heat exchange device; 15 is a sub-high-temperature energy storage heat exchange device; 16 is a medium-temperature energy storage heat exchange device; 17 is a low-temperature energy storage heat exchange device; 18 is a primary economizer; 19 is a secondary economizer; 20 is an evaporator; 21 is a superheater; 22 is a steel coil; 23 is a heat exchange coil. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example 1

[0031] like Figure 1-3 As shown, a high-temperature steel coil waste heat recovery power generation device comprises a steel structure, a platform, a steel coil heat exchange device 1, a steel coil heat exchange device 2, a gravity-type fixing device, a steel coil heat exchange device 3, a hydraulic opening device 1, a steel coil heat exchange device 4, a fixing device, a hydraulic opening device 2, an end heat exchange device, a temperature-controlled four-way reversing valve, an electric switch valve, a high-temperature energy storage heat exchange device, a sub-high-temperature energy storage heat exchange device, a medium-temperature energy storage heat exchange device, a low-temperature energy storage heat exchange device, a primary economizer, a secondary economizer, an evaporator, a superheater and a heat exchange coil.

[0032] Heat exchange coils are arranged on the inner sides of the steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3, the steel coil heat exchange device 4 and the end heat exchange device. The steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3 and the steel coil heat exchange device 4 form a cylinder. The front and rear sides of the cylinder are provided with end heat exchange devices and are fixed to the platform through the hydraulic opening device 2. The steel coil is placed in the cylinder. The steel coil heat exchange device 1 and the steel coil heat exchange device 2 are arranged at the bottom of the cylinder and are respectively fixed to the platform through the gravity fixing device. The steel coil heat exchange device 3 and the steel coil heat exchange device 4 are arranged on the upper side of the cylinder and are respectively fixed to the steel structure through the hydraulic opening device 1. The steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3 and the steel coil heat exchange device 4 The two sides are fixed to the steel structure by fixing devices, and the steel structure is fixed to the platform; the steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3 and the steel coil heat exchange device 4 form a cylindrical structure, the steel coil heat exchange device 1 and the steel coil heat exchange device 2 are symmetrically arranged at the bottom of the cylinder and are respectively fixed to the platform by gravity-type fixing devices, the steel coil heat exchange device 3 and the steel coil heat exchange device 4 are symmetrically arranged on the upper part of the cylinder and are respectively fixed to the steel structure arranged on the platform by hydraulic opening device 1, and circular end heat exchange devices are fixed on the front and back sides of the cylinder; when it is necessary to open the cylinder, the hydraulic opening device 1 drives the steel coil heat exchange device to move to both sides to open the upper part of the cylinder, and then the steel coil is placed in the cylinder, and the heat transfer oil in the heat exchange coil on the inner side of the heat exchange device absorbs heat.

[0033] The total output pipeline of the heat exchange coil is connected to the temperature-controlled four-way reversing valve, and the four output pipelines of the temperature-controlled four-way reversing valve are respectively connected to the high-temperature energy storage heat exchange device, the sub-high-temperature energy storage heat exchange device, the medium-temperature energy storage heat exchange device and the low-temperature energy storage heat exchange device. Superheater, evaporator, secondary economizer and primary economizer are arranged in the high-temperature energy storage heat exchange device, the sub-high-temperature energy storage heat exchange device, the medium-temperature energy storage heat exchange device and the low-temperature energy storage heat exchange device in sequence. The output pipelines of the high-temperature energy storage heat exchange device, the sub-high-temperature energy storage heat exchange device, the medium-temperature energy storage heat exchange device and the low-temperature energy storage heat exchange device are connected to the input pipeline of the temperature-controlled four-way reversing valve, and the output pipeline of the temperature-controlled four-way reversing valve is connected to the total input pipeline of the heat exchange coil; the heat transfer oil after absorbing heat in the heat exchange coil flows through the temperature-controlled four-way reversing valve, and which specific pipeline at the output end of the temperature-controlled four-way reversing valve is opened is controlled according to the problem of the heat transfer oil, and enters the corresponding energy storage heat exchange device for heat exchange.

[0034] The feed water passes through the primary economizer, secondary economizer, evaporator and superheater in sequence to output superheated steam.

[0035] The utility model discloses a high-temperature steel coil waste heat recovery power generation device, wherein the steel coil heat exchange device one, the steel coil heat exchange device two, the steel coil heat exchange device three and the steel coil heat exchange device four form a circumference, and the fixing device is fixed on the steel coil heat exchange device one and the steel coil heat exchange device two.

[0036] The utility model discloses a high-temperature steel coil waste heat recovery power generation device, wherein the medium in the heat exchange coil is heat transfer oil.

[0037] The utility model discloses a high-temperature steel coil waste heat recovery power generation device, wherein the temperature ranges of the high-temperature energy storage heat exchange device, the sub-high-temperature energy storage heat exchange device, the medium-temperature energy storage heat exchange device and the low-temperature energy storage heat exchange device are 400 degrees to 360 degrees, 300 degrees to 260 degrees, 200 degrees to 150 degrees and 100 degrees to 80 degrees respectively.

[0038] The utility model discloses a high-temperature steel coil waste heat recovery power generation device, wherein the steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3, the steel coil heat exchange device 4 and the heat exchange coil inside the end heat exchange device are connected together and connected to the temperature control four-way reversing valve through the main input pipeline and the main output pipeline.

[0039] Example 2

[0040] like Figure 1-3 As shown, a high-temperature steel coil waste heat recovery power generation device, the specific working process is: open the steel coil heat exchange device 3 and the steel coil heat exchange device 4 through the hydraulic opening device 1, and use a crane to put the high-temperature steel coil into the space surrounded by the steel coil heat exchange device. Then, the hydraulic opening device 1 closes the steel coil heat exchange device 3 and the steel coil heat exchange device 4. The medium in the heat exchange coils arranged inside the steel coil heat exchange device 1, the steel coil heat exchange device 2, the steel coil heat exchange device 3, and the steel coil heat exchange device 4 absorbs the heat of the high-temperature steel coil.

[0041] When the medium temperature in the coil heat exchange device reaches the high temperature range, the temperature-controlled four-way reversing valve leading to the high-temperature energy storage coil heat exchange device opens, and the high-temperature medium in the coil heat exchange device is sent to the high-temperature energy storage heat exchange device. The high-temperature medium heats the saturated steam in the superheater in the high-temperature energy storage heat exchange device into superheated steam.

[0042] When the medium temperature in the coil heat exchange device reaches the sub-high temperature range, the valve of the temperature-controlled four-way reversing valve leading to the sub-high temperature energy storage heat exchange device opens, and the sub-high temperature medium in the coil heat exchange device is sent to the sub-high temperature energy storage heat exchange device. The sub-high temperature medium heats the hot water in the evaporator in the sub-high temperature energy storage heat exchange device into saturated steam.

[0043] When the medium temperature in the coil heat exchanger reaches the medium temperature range, the temperature-controlled four-way reversing valve leading to the medium temperature energy storage heat exchanger opens, and the medium temperature medium in the coil heat exchanger is sent to the medium temperature energy storage heat exchanger. The medium temperature medium further heats the hot water in the secondary economizer in the medium temperature energy storage heat exchanger.

[0044] When the medium temperature in the coil heat exchange device reaches the low temperature range, the valve of the temperature-controlled four-way reversing valve leading to the low temperature energy storage heat exchange device opens, and the low temperature medium in the coil heat exchange device is sent to the low temperature energy storage heat exchange device. The low temperature medium heats the cold water in the first economizer in the low temperature energy storage heat exchange device.

[0045] The heat exchange medium in the high-temperature energy storage steel coil heat exchange device, the sub-high-temperature energy storage steel coil heat exchange device, the medium-temperature energy storage steel coil heat exchange device, and the low-temperature energy storage steel coil heat exchange device returns to the steel coil heat exchange device after releasing heat and recirculates.

[0046] When the energy storage temperature is reached, the four energy storage steel coil heat exchange devices are used at the same time. Without heat input, they can continuously exchange heat for more than 4 hours, which means continuous power generation for 4 hours. This not only ensures the normal supply of steam required for power generation, but also plays a role in storage and peak regulation.

[0047] The waste heat of steel coils is recovered for power generation by transferring heat from dozens of heat exchange devices to the energy storage device.

[0048] Waste heat recovery system water flow

[0049] The treated water enters the primary economizer for preliminary heating, then enters the secondary economizer for further heating, and then enters the evaporator for heating into saturated steam. The saturated steam is sent to the superheater and heated into superheated steam, and the superheated steam enters the waste heat power generation system for power generation, which belongs to the prior art.

[0050] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-temperature steel coil waste heat recovery power generation device, characterized in that: The high-temperature steel coil waste heat recovery power generation device comprises a steel structure (1), a platform (2), a steel coil heat exchange device 1 (3), a steel coil heat exchange device 2 (4), a gravity-type fixing device (5), a steel coil heat exchange device 3 (6), a hydraulic opening device 1 (7), a steel coil heat exchange device 4 (8), a fixing device (9), a hydraulic opening device 2 (10), an end heat exchange device (11), a temperature-controlled four-way reversing valve (12), an electric switch valve (13), a high-temperature energy storage heat exchange device (14), a sub-high-temperature energy storage heat exchange device (15), a medium-temperature energy storage heat exchange device (16), a low-temperature energy storage heat exchange device (17), a primary economizer (18), a secondary economizer (19), an evaporator (20), a superheater (21) and a heat exchange coil (23). The inner sides of the steel coil heat exchange device 1 (3), the steel coil heat exchange device 2 (4), the steel coil heat exchange device 3 (6), the steel coil heat exchange device 4 (8) and the end heat exchange device (11) are provided with heat exchange coils (23); the steel coil heat exchange device 1 (3), the steel coil heat exchange device 2 (4), the steel coil heat exchange device 3 (6) and the steel coil heat exchange device 4 (8) form a cylinder; the end heat exchange devices (11) are provided on the front and rear sides of the cylinder and are fixed on the platform (2) through the hydraulic opening device 2 (10); the steel coil (22) is placed in the cylinder; the steel coil heat exchange device 1 The first steel coil heat exchange device (3) and the second steel coil heat exchange device (4) are arranged at the bottom of the cylinder and are respectively fixed to the platform (2) by means of gravity-type fixing devices (5); the third steel coil heat exchange device (6) and the fourth steel coil heat exchange device (8) are arranged on the upper side of the cylinder and are respectively fixed to the steel structure (1) by means of hydraulic opening devices (7); the first steel coil heat exchange device (3), the second steel coil heat exchange device (4), the third steel coil heat exchange device (6) and the fourth steel coil heat exchange device (8) are fixed to the steel structure (1) by means of fixing devices (9); and the steel structure (1) is fixed to the platform (2); The total output pipeline of the heat exchange coil (23) is connected to the temperature-controlled four-way reversing valve (12), and the four output pipelines of the temperature-controlled four-way reversing valve (12) are respectively connected to the high-temperature energy storage heat exchange device (14), the sub-high-temperature energy storage heat exchange device (15), the medium-temperature energy storage heat exchange device (16) and the low-temperature energy storage heat exchange device (17). 7) is sequentially provided with a superheater (21), an evaporator (20), a secondary economizer (19) and a primary economizer (18); the output pipes of the high-temperature energy storage heat exchange device (14), the sub-high-temperature energy storage heat exchange device (15), the medium-temperature energy storage heat exchange device (16) and the low-temperature energy storage heat exchange device (17) are connected to the input pipe of the temperature-controlled four-way reversing valve (12); and the output pipe of the temperature-controlled four-way reversing valve (12) is connected to the total input pipe of the heat exchange coil (23); The feed water passes through the primary economizer (18), the secondary economizer (19), the evaporator (20) and the superheater (21) in sequence to output superheated steam.

2. The high temperature steel coil waste heat recovery power generation device according to claim 1 is characterized in that: The steel coil heat exchange device one (3), the steel coil heat exchange device two (4), the steel coil heat exchange device three (6) and the steel coil heat exchange device four (8) form a circle, and the fixing device (9) is fixed on the steel coil heat exchange device one (3) and the steel coil heat exchange device two (4).

3. The high temperature steel coil waste heat recovery power generation device according to claim 1 is characterized in that: The medium in the heat exchange coil (23) is heat transfer oil.

4. The high temperature steel coil waste heat recovery power generation device according to claim 1 is characterized in that: The temperature ranges of the high-temperature energy storage heat exchange device (14), the sub-high-temperature energy storage heat exchange device (15), the medium-temperature energy storage heat exchange device (16) and the low-temperature energy storage heat exchange device (17) are 400-360 degrees, 300-260 degrees, 200-150 degrees and 100-80 degrees respectively.

5. The high temperature steel coil waste heat recovery power generation device according to claim 1 is characterized in that: The heat exchange coils (23) inside the steel coil heat exchange device 1 (3), the steel coil heat exchange device 2 (4), the steel coil heat exchange device 3 (6), the steel coil heat exchange device 4 (8) and the end heat exchange device (11) are connected together and connected to the temperature-controlled four-way reversing valve (12) through a main input pipeline and a main output pipeline.

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