Heat accumulator steam generation system

Abstract

The utility model relates to a steam generation system of a heat accumulator, and belongs to the field of heat exchange systems. The waste heat exchange module is used for exchanging heat between incoming water and waste heat to generate heat exchange steam; the heat storage module comprises a heat storage body, an electric heating rod and a second steam connecting pipe, the electric heating rod heats the heat storage body, the second steam connecting pipe guides heat exchange steam into the heat storage body and heats the heat storage body, and heat storage is achieved. The high-temperature heat storage body is used for heating incoming water of a steam pocket to generate high-grade steam. The heat storage module and the waste heat exchange module are connected through a pipeline and used for condensate water circulation. High-grade steam is introduced into the steam pocket, high-temperature and high-pressure steam is generated through pressure filtration, and the steam pocket is used for releasing surplus steam through the steam exhaust pipe. According to the efficient heat accumulator steam generation system, waste heat is used for generating high-temperature and high-pressure steam, and cyclic utilization of heat energy is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam energy storage, and in particular to a steam production system based on waste heat energy storage. Background Art

[0002] High-temperature and high-pressure steam is an important energy source in industrial production. It can be used for power generation, drying, heating, driving, refrigeration, domestic heating, etc. It is cleaner than petrochemical resources.

[0003] In addition, the utilization rate of valley electricity in the power grid is low, resulting in significant waste in the power supply system. Developing energy storage technology to store valley electricity and release it during peak power hours can save peak power consumption and save electricity costs for enterprises.

[0004] At present, the heat storage / heat storage technology on the market has experienced significant development and is being promoted and applied. For example, the molten salt heat accumulator heats the molten salt through high-temperature and high-pressure steam, stores the heat of the high-pressure steam, and / or uses valley electricity to heat the molten salt energy storage system, and then converts it into high-pressure steam when releasing heat, which is used to do external work, thereby realizing energy storage and conversion. However, in actual production, it is found that the existing storage system using molten salt heat storage has the disadvantages of low safety, high operating requirements, and large footprint. Utility Model Content

[0005] The utility model provides a heat storage body steam production system, which is intended to utilize industrial waste heat to convert and generate high-temperature and high-pressure steam that can do external work.

[0006] The technical solution of the utility model is: a heat storage body steam generation system, comprising:

[0007] Waste heat heat exchange module: comprising a heat exchange body, a first water inlet pipe, and a first steam outlet pipe, wherein the first water inlet pipe is used to connect water to the heat exchange body, the heat exchange body is used to exchange water with waste heat to generate steam, and the first steam outlet pipe is used to output heat exchange steam from the heat exchange body;

[0008] Thermal storage module: including a thermal storage body, an electric heating rod, a second steam pipe, a second water pipe, a second steam outlet pipe and a condensation outlet pipe, wherein the electric heating rod is inserted into the thermal storage body for heating the thermal storage body, the second steam pipe is connected to the first steam outlet pipe for introducing the heat exchange steam generated by the waste heat heat exchange module into and heating the thermal storage body, the condensation outlet pipe is used to output condensed water (condensed water generated after the heat exchange steam releases heat) from the thermal storage body, the second water pipe is used to connect the water to the thermal storage body, the thermal storage body is used to heat the water to generate high-grade steam, and the second steam outlet pipe is used to output high-grade steam from the thermal storage body;

[0009] Steam drum: includes a boiler drum, a third steam connecting pipe, a third steam outlet pipe, an exhaust pipe and a water outlet pipe. The third steam connecting pipe is connected to the second steam outlet pipe to introduce the high-grade steam generated by the heat storage module into the boiler drum. The third steam outlet pipe is used to output high-temperature and high-pressure steam from the boiler drum. The exhaust pipe is used to release surplus steam from the boiler drum. The water outlet pipe is connected to the second water inlet connecting pipe to provide water for the heat storage module, forming a circulation between the steam drum and the heat storage module.

[0010] It should be understood that: in the above scheme, the first water supply pipe and the second water supply pipe can be externally connected to desalinated, deoxygenated, pure water, etc., and the water is at room temperature or warm.

[0011] As one of the preferred embodiments of the present application, the waste heat heat exchange module also includes a condensation reflux pipe, and the condensation outlet pipe of the heat storage module is connected to the condensation reflux pipe. The condensed water generated by the heat exchange steam releasing heat in the heat storage body returns to the heat exchange body through the condensation reflux pipe, forming a circulation between the heat storage module and the waste heat heat exchange module.

[0012] As one of the preferred embodiments of the present application, the waste heat exchange module has one or more heat exchange bodies, and the multiple heat exchange bodies respectively have a first water inlet pipe, a first steam outlet pipe, and input and output pipelines of a waste heat source. The waste heat source can be high-temperature flue gas, steam or others generated by industry.

[0013] As one of the preferred embodiments of the present application, the second steam connecting pipe and the second steam outlet pipe of the thermal storage module are arranged at the top of the thermal storage body, and the second water inlet connecting pipe and the condensation outlet pipe are arranged at the bottom of the thermal storage body. The thermal storage body is one or more thermal storage units, and the multiple thermal storage units respectively have an electric heating rod, a second steam connecting pipe, a second water inlet connecting pipe, a second steam outlet pipe and a condensation outlet pipe.

[0014] As one of the preferred embodiments of the present application, it also includes a storage tank, the exhaust pipe of the steam drum is connected to the storage tank, the storage tank has a fourth water inlet connecting pipe, the fourth water inlet connecting pipe is used to replenish the water condensation steam to the storage tank, the storage tank is used to store the surplus steam discharged from the exhaust pipe, and the surplus steam is condensed by the water to be stored as condensed water. The stored condensed water is preferably returned to the steam drum by pressurization to avoid waste of heat energy.

[0015] As one of the preferred embodiments of the present application, the storage tank has a fourth water outlet pipe, which is connected to the steam drum and is used to replenish water from the storage tank to the steam drum. A booster pipeline is provided on the connecting pipeline between the storage tank and the steam drum to boost the pressure of the reflux condensed water so that it can smoothly return to the steam drum.

[0016] As one of the preferred embodiments of the present application, the heat exchange body of the waste heat exchange module is connected to the storage tank, and the waste heat carrier is connected to the storage tank through a pipeline after heat exchange in the heat exchange body. The storage tank is used to store the residual heat energy of the waste heat carrier, thereby reducing the emission of the waste heat exchange module and making full use of the waste heat.

[0017] Compared with the prior art, the utility model has the following advantages: the application provides a heat storage body steam production system, which is divided into a heat storage part and a heat release part according to its function. The heat storage part is composed of a waste heat heat exchange module and a heat storage module, and the heat release part is composed of a heat storage module and a steam drum module. Both the heat storage part and the heat release part perform heat conversion in the form of steam, and the implementation method is as follows:

[0018] Heat storage is to use the waste heat heat exchange module to generate heat exchange steam, and use the heat exchange steam to heat the heat storage body of the heat storage module. The heat storage body is provided with a heating rod. On the basis of the heat exchange steam heating, the heating rod is used (the heating rod is preferably operated during the valley electricity period) to further heat the heat storage body to a higher temperature, thereby realizing the storage of thermal energy and valley electricity.

[0019] Heat release is the process of introducing incoming water into the heat storage body. The heat storage body heats the incoming water to produce high-grade steam. The high-grade steam enters the steam drum and provides high-temperature and high-pressure steam to the outside after pressure filtration. It is used to do external work: power generation, traction, heating, refrigeration, heating, hot water supply, etc.

[0020] In order to reduce the system's external discharge, improve the waste heat utilization rate and steam quality, the present application designs a condensed water circulation between the heat storage module and the waste heat exchange module, designs an incoming water circulation between the steam drum and the heat storage module, and designs a condensed water circulation between the storage tank and the steam drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the overall structural diagram of the heat storage body steam generation system in the embodiment of the utility model;

[0022] Figure 2 This is a structural diagram of the heat storage and heat release parts of the system in the embodiment of the utility model;

[0023] Figure 3 It is a structural diagram of the steam drum exhaust part of the system in the embodiment of the utility model;

[0024] In the figure, a waste heat heat exchange module 100, a heat exchange body 101, a first water inlet pipe 102, a first steam outlet pipe 103, and a condensation reflux pipe 104 are shown; a heat storage module 200, a heat storage body 201, an electric heating rod 202, a second steam pipe 203, a second water inlet pipe 204, a second steam outlet pipe 205, and a condensation outlet pipe 206; a steam drum 300, a boiler drum 301, a third steam pipe 302, a third steam outlet pipe 303, an exhaust pipe 304, and a water outlet pipe 305; a storage tank 400, a fourth water inlet pipe 401, a fourth water outlet pipe 402, and a booster pipeline 500 are shown. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings. The embodiments are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The text description in this embodiment corresponds to the accompanying drawings, and the description of the orientation is also based on the description of the accompanying drawings. These description methods are all for better explaining the technical solutions listed in the embodiments, but should not be understood as limiting the scope of protection of the present invention.

[0026] The purpose of this embodiment is to introduce a thermal storage body steam generation system, which includes four parts:

[0027] The waste heat exchange module 100 includes a heat exchange body 101, a first water inlet pipe 102, a first steam outlet pipe 103 and a condensation reflux pipe 104. The first water inlet pipe 102 is used to connect water to the heat exchange body 101. A coil is arranged inside the heat exchange body 101 to form a shell-and-tube heat exchange structure. The coil is used to connect and output waste heat carriers. The water and waste heat carriers exchange heat inside the heat exchange body 101 to generate steam, and the heat exchange steam is output from the first steam outlet pipe 103. The heat exchange body 101 is connected to the storage tank 400 by pipeline. After heat exchange in the heat exchange body 101, the waste heat carrier is connected to the storage tank 400 through a pipeline. The storage tank 400 stores the waste heat energy of the waste heat carrier.

[0028] Thermal storage module 200: includes thermal storage body 201, electric heating rod 202, second steam pipe 203, second water pipe 204, second steam outlet pipe 205 and condensation outlet pipe 206. Second steam pipe 203 and second steam outlet pipe 205 are arranged at the top of thermal storage body 201, second water pipe 204 and condensation outlet pipe 206 are arranged at the bottom of thermal storage body 201. Electric heating rod 202 is inserted into thermal storage body 201 to heat thermal storage body 201 to reach a higher temperature. Second steam pipe 203 is connected to first steam outlet pipe 103 to introduce heat exchange steam into and heat thermal storage body 201. Condensation outlet pipe 206 is used to output condensation water from thermal storage body 201 to the outside. Second water pipe 204 is used to connect water to thermal storage body 201. High temperature thermal storage body heats water to generate high-grade steam. Second steam outlet pipe 205 is used to output high-grade steam from thermal storage body 201 to the outside. The condensation water outlet pipe 206 of the heat storage module is connected to the condensation return pipe 104. The condensation water generated by the heat exchange steam releasing heat in the heat storage body returns to the heat exchange body 101 through the condensation return pipe 104, forming a circulation between the heat storage module 200 and the waste heat exchange module 100.

[0029] Steam drum 300: includes a boiler drum 301, a third steam connecting pipe 302, a third steam outlet pipe 303, an exhaust pipe 304 and a water outlet pipe 305. The third steam connecting pipe 302 is connected to the second steam outlet pipe 205 to introduce the high-grade steam generated by the heat storage module into the boiler drum 301. The third steam outlet pipe 303 is used to output high-temperature and high-pressure steam from the boiler drum. The exhaust pipe 304 is used to release surplus steam from the boiler drum. The exhaust pipe 304 is normally closed. The water outlet pipe 305 is connected to the second water connecting pipe 204 to provide water for the heat storage module 200, forming a water circulation between the steam drum and the heat storage module.

[0030] Storage tank 400: The exhaust pipe 304 of the drum 300 is connected to the storage tank 400. The storage tank 400 has a fourth water inlet pipe 401 and a fourth water outlet pipe 402. The fourth water inlet pipe 401 is used to add water to the storage tank, cool the steam, and condense the steam. The fourth water outlet pipe 402 is connected to the drum 300 and is used to return water from the storage tank 400 to the drum 300. A booster pipeline 500 is arranged on the pipeline of the fourth water outlet pipe 402.

[0031] Furthermore, the heat storage body 201 is composed of a plurality of heat storage units, each of which has an electric heating rod 202 , a second steam connecting pipe 203 , a second water connecting pipe 204 , a second steam outlet pipe 205 and a condensed water outlet pipe 206 .

[0032] The working principle of the above thermal storage steam generation system is as follows:

[0033] The waste heat heat exchange module and the heat storage module play a heat storage function. The waste heat heat exchange module is used to realize heat exchange between incoming water and waste heat to generate heat exchange steam, and the heat exchange steam is used to heat the heat storage body. On the basis of the heat exchange steam heating, the heating rod is used to further heat the heat storage body to a higher temperature using valley electricity, thereby realizing thermal energy and valley electricity storage.

[0034] The heat storage module and the steam drum perform the function of releasing heat. The steam drum provides water to the heat storage module, which is heated in the heat storage module to produce high-grade steam. The high-grade steam returns to the steam drum and is pressurized and filtered to produce high-temperature and high-pressure steam, which is used to do external work.

[0035] The steam drum is connected to the storage tank through an exhaust pipe, which is used to guide the surplus steam in the steam drum into the storage tank. The storage tank is connected to water to condense the steam, and the generated condensed water is pressurized and returned to the steam drum.

[0036] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A thermal storage body steam generation system, characterized in that: include: The waste heat heat exchange module (100) comprises a heat exchange body (101), a first water inlet pipe (102), and a first steam outlet pipe (103), wherein the first water inlet pipe (102) is used to connect water to the heat exchange body, the heat exchange body is used to generate steam by exchanging water with waste heat, and the first steam outlet pipe (103) is used to output heat exchange steam from the heat exchange body to the outside; The heat storage module (200) comprises a heat storage body (201), an electric heating rod (202), a second steam pipe (203), a second water pipe (204), a second steam outlet pipe (205) and a condensation outlet pipe (206), wherein the electric heating rod is inserted into the heat storage body for heating the heat storage body, the second steam pipe (203) is connected to the first steam outlet pipe (103) for introducing the heat exchange steam generated by the waste heat exchange module into and heating the heat storage body, the condensation outlet pipe (206) is used to output condensation water from the heat storage body, the second water pipe (204) is used to connect water to the heat storage body, the heat storage body is used to heat the water to generate high-quality steam, and the second steam outlet pipe (205) is used to output high-quality steam from the heat storage body; The steam drum (300) comprises a boiler drum (301), a third steam connecting pipe (302), a third steam outlet pipe (303), an exhaust pipe (304) and a water outlet pipe (305). The third steam connecting pipe (302) is connected to the second steam outlet pipe (205) for introducing high-quality steam generated by the heat storage module into the boiler drum (301). The third steam outlet pipe (303) is used to output high-temperature and high-pressure steam from the boiler drum. The exhaust pipe (304) is used to release surplus steam from the boiler drum. The water outlet pipe (305) is connected to the second water inlet connecting pipe (204) for providing water to the heat storage module, thereby forming a circulation between the steam drum and the heat storage module.

2. The system according to claim 1, characterized in that: The waste heat exchange module (100) further comprises a condensation return pipe (104), and the condensation water outlet pipe (206) of the heat storage module (200) is connected to the condensation return pipe (104). Condensed water generated by heat exchange steam releasing heat in the heat storage body returns to the heat exchange body (101) through the condensation return pipe (104), forming a circulation between the heat storage module and the waste heat exchange module.

3. The system according to claim 1, characterized in that: The waste heat exchange module (100) has one or more heat exchange bodies (101), and each of the plurality of heat exchange bodies (101) has a first water inlet pipe (102), a first steam outlet pipe (103), and input and output pipelines of a waste heat source.

4. The system according to claim 1, characterized in that: The second steam connecting pipe (203) and the second steam outlet pipe (205) of the heat storage module (200) are arranged at the top of the heat storage body, and the second water inlet connecting pipe (204) and the condensation water outlet pipe (206) are arranged at the bottom of the heat storage body. The heat storage body is one or more heat storage units, and the multiple heat storage units respectively have an electric heating rod (202), a second steam connecting pipe (203), a second water inlet connecting pipe (204), a second steam outlet pipe (205) and a condensation water outlet pipe (206).

5. The system according to claim 1, characterized in that: It also includes a storage tank (400), the exhaust pipe (304) of the steam drum (300) is connected to the storage tank (400), and the storage tank (400) has a fourth water supply pipe (401), which is used to supplement the storage tank with water to condense steam.

6. The system according to claim 5, characterized in that: The storage tank has a fourth water outlet pipe (402), which is connected to the steam drum (300) and is used to replenish water from the storage tank to the steam drum.

7. The system according to claim 6, characterized in that: A boosting pipeline (500) is arranged on the connecting pipeline between the storage tank and the steam drum.

8. The system according to claim 5, characterized in that: The heat exchange body (101) of the waste heat exchange module (100) is connected to the storage tank (400), and the waste heat carrier is connected to the storage tank (400) through a pipeline after heat exchange in the heat exchange body. The storage tank (400) is used to store the waste heat energy of the waste heat carrier.

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