Overheating heat supply system

Abstract

The utility model discloses an overheating heat supply system, which relates to the technical field of heat supply, and comprises a waste heat boiler drum for a heating furnace in a steel rolling workshop, an inlet of the steam compressor can be communicated with an outlet of the waste heat boiler drum; according to the steam vacuumizing device for the vacuum refining device of the electric furnace steelmaking workshop, a high-pressure gas inlet of the steam vacuumizing device can be communicated with an outlet of the steam compressor, and an air suction port of the steam vacuumizing device is used for being communicated with the interior of a furnace body of the vacuum refining device. The problems that steam generated by a waste heat pot of a heating furnace in a steel rolling workshop is generally low in pressure and cannot be efficiently utilized, and a vacuum refining device in an electric furnace steelmaking workshop cannot obtain a large amount of low-pressure superheated steam at low cost for vacuumizing can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat supply, particularly relates to a superheated heat supply system. BACKGROUND

[0002] The steel plant recycles various production process such as sintering, steelmaking, rolling and the like flue gas waste heat to generate steam, and the recycled waste heat steam is different in use mode according to different parameters, the sintering waste heat steam is high in pressure and temperature, and a sintering waste heat generator set is generally separately arranged; the steelmaking waste heat steam is low-pressure saturated steam, and is generally used for low-pressure saturated steam power generation or used as steam supplement for sintering waste heat power generation; the rolling waste heat steam is similar in design parameter to the steam parameter output by the converter regenerator, but the running pressure of the rolling steam is low in many steel plants, and the rolling steam can only be used as steam supplement for low-pressure saturated steam power generation or directly merged into a low-pressure steam external network for low use.

[0003] The molten steel of the special steel plant is high in smelting proportion by the vacuum refining device, the vacuum refining device uses steam to vacuum, and a large amount of steam needs to be consumed. When the special steel plant adopts the electric furnace for steelmaking, a large amount of electric furnace flue gas waste heat is not recycled to generate steam, and the steam used by the vacuum refining device is transported from the power plant by long-distance steam extraction, and the steam use cost is high. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the utility model embodiment is to provide a superheated heat supply system, which can solve the problem that the steam generated by the waste heat boiler of the heating furnace of the rolling workshop is generally low in pressure and cannot be efficiently utilized, and the vacuum refining device of the electric furnace steelmaking workshop cannot obtain a large amount of low-pressure superheated steam at low cost for vacuum extraction.

[0005] The specific technical scheme of the utility model embodiment is as follows:

[0006] A superheated heat supply system, the superheated heat supply system comprises:

[0007] A waste heat boiler drum for a heating furnace of a rolling workshop;

[0008] A steam compressor, an inlet of the steam compressor can be communicated with an outlet of the waste heat boiler drum;

[0009] A steam vacuumizing device for a vacuum refining device of an electric furnace steelmaking workshop, a high-pressure gas inlet of the steam vacuumizing device can be communicated with an outlet of the steam compressor, and a suction port of the steam vacuumizing device is used for being communicated with an inside of a furnace body of the vacuum refining device.

[0010] Preferably, the superheated heat supply system comprises:

[0011] A regenerator, the regenerator is connected in parallel with the steam compressor.

[0012] Preferably, the superheating heating system has a first operating state in which the inlet of the vapor compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the vapor compressor is in communication with the high pressure gas inlet of the vapor evacuation device, the vapor compressor is in an open state, the accumulator is disconnected from the outlet of the waste heat boiler drum, and the accumulator is disconnected from the high pressure gas inlet of the vapor evacuation device.

[0013] Preferably, the superheating heating system has a second operating state in which the vapor compressor is in an open state, the accumulator is in communication with the outlet of the vapor compressor, the inlet of the vapor compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the vapor compressor is disconnected from the high pressure gas inlet of the vapor evacuation device, the accumulator is disconnected from the high pressure gas inlet of the vapor evacuation device, and the inlet of the vapor compressor is disconnected from the accumulator.

[0014] Preferably, the superheating heating system has a third operating state in which the inlet of the vapor compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the vapor compressor is in communication with the high pressure gas inlet of the vapor evacuation device, the vapor compressor is in an open state, the accumulator is in communication with the inlet of the vapor compressor, and the accumulator is disconnected from the outlet of the vapor compressor.

[0015] Preferably, the superheating heating system comprises:

[0016] a low pressure steam network that is in communication with the outlet of the waste heat boiler drum.

[0017] Preferably, the superheating heating system has a first operating state in which the inlet of the vapor compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the vapor compressor is in communication with the high pressure gas inlet of the vapor evacuation device, the vapor compressor is in an open state, the accumulator is disconnected from the outlet of the waste heat boiler drum, the accumulator is disconnected from the high pressure gas inlet of the vapor evacuation device, and the outlet of the waste heat boiler drum is in communication with the low pressure steam network.

[0018] Preferably, the superheating heating system has a fourth operating state in which the inlet of the vapor compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the vapor compressor is in communication with the high pressure gas inlet of the vapor evacuation device, the low pressure steam network is in communication with the inlet of the vapor compressor, and the vapor compressor is in an open state; the accumulator is disconnected from the outlet of the waste heat boiler drum, and the accumulator is disconnected from the high pressure gas inlet of the vapor evacuation device.

[0019] Preferably, the vapor compressor is a variable frequency vapor compressor.

[0020] Preferably, the inlet of the vapor compressor is connected with the outlet of the waste heat boiler drum through a first pipeline;

[0021] The outlet of the vapor compressor is connected with the high-pressure gas inlet of the vapor vacuumizing device through a second pipeline with a first valve device;

[0022] The first port of the heat accumulator is connected with the outlet of the vapor compressor through a third pipeline with a second valve device;

[0023] The second port of the heat accumulator is connected with the first pipeline through a fourth pipeline with a third valve device.

[0024] The technical scheme of the utility model has the following remarkable beneficial effects:

[0025] The present application can compress the steam with low pressure generated by the waste heat boiler drum of the heating furnace in the rolling mill of the steel plant through the vapor compressor, so as to improve the steam pressure and change the saturated steam into superheated steam. When the vacuum refining device of the electric furnace steelmaking plant needs to be vacuumized, the superheated steam compressed by the vapor compressor is input into the high-pressure gas inlet of the vapor vacuumizing device, the suction port of the vapor vacuumizing device is communicated with the inside of the furnace body of the vacuum refining device, at this time, the inside of the furnace body is vacuumized by using the superheated steam. Through the above-mentioned mode, the smelting cost can be reduced, the utilization value of the rolling mill waste heat steam is improved, the high-quality power plant steam is saved, and the cost reduction and benefit increase of the steel plant, green and low carbon are contributed. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings described herein are only for the purpose of explanation, and are not intended to limit the scope of the present utility model disclosure in any way. In addition, the shape and scale of each component in the drawings are only illustrative, and are used to help understand the present utility model, and are not specific limitations on the shape and scale of each component of the present utility model. Those skilled in the art can select various possible shapes and scales according to specific conditions to implement the present utility model under the guidance of the present utility model.

[0027] Figure 1 The structure diagram of the superheated heat supply system in the embodiment of the present utility model.

[0028] The reference signs of the above drawings are as follows:

[0029] 1, waste heat boiler drum; 2, steam compressor; 3, steam vacuum device; 4, heat accumulator; 5, first pipeline; 6, second pipeline; 61, first valve device; 7, third pipeline; 71, second valve device; 8, fourth pipeline; 81, third valve device; 9, low-pressure steam pipe network; 91, fourth valve device. DETAILED DESCRIPTION

[0030] The details of the present application described herein can be more clearly understood with reference to the accompanying drawings and the description of specific embodiments of the present application. However, the specific embodiments of the present application described herein are only for the purpose of explaining the present application, and should not be understood in any way as limiting the present application. Under the teachings of the present application, skilled persons can conceive of any possible variations based on the present application, which should be considered to fall within the scope of the present application.

[0031] In order to solve the problem that the steam generated by the waste heat boiler drum of the heating furnace of the rolling mill workshop is generally low in pressure and cannot be efficiently utilized, and the vacuum refining device of the electric furnace steelmaking workshop cannot obtain a large amount of low-pressure superheated steam at low cost for vacuumizing, a superheated heat supply system is provided in the present application, Figure 1 The structure of the superheated heat supply system in the embodiments of the present application is shown in Figure 1 As shown, the superheated heat supply system can include: a waste heat boiler drum 1 for a heating furnace of a rolling mill workshop; a steam compressor 2, an inlet of the steam compressor 2 being in communication with an outlet of the waste heat boiler drum 1; a steam vacuum device 3 for a vacuum refining device of an electric furnace steelmaking workshop, a high-pressure gas inlet of the steam vacuum device 3 being in communication with an outlet of the steam compressor 2, and a suction port of the steam vacuum device 3 being used for communication with an inside of a furnace body of the vacuum refining device.

[0032] The present application can compress the steam generated by the waste heat boiler drum 1 of the heating furnace of the rolling mill workshop of the steel plant through the steam compressor 2 to improve the steam pressure, and change the saturated steam into superheated steam. When the inside of the furnace body of the vacuum refining device of the electric furnace steelmaking workshop of the special steel plant needs to be vacuumized, the superheated steam compressed by the steam compressor 2 is input to the high-pressure gas inlet of the steam vacuum device 3, the suction port of the steam vacuum device 3 is in communication with the inside of the furnace body of the vacuum refining device, at this time, the superheated steam is used to vacuumize the inside of the furnace body. Through the above-mentioned way, the smelting cost can be reduced, at the same time, the utilization value of the waste heat steam of the rolling mill is improved, the high-quality power plant steam is saved, and the steel plant is contributed to cost reduction and efficiency increase, green and low carbon.

[0033] The steam generally output by the waste heat boiler drum 1 of the heating furnace of the rolling mill plant is low-pressure saturated steam, and the pressure thereof is about 0.3-0.7 MPa. The heating furnace of the rolling mill plant generally has multiple (2, 3, 4, etc.) heating furnaces, and the heating furnaces may have one, two or multiple furnaces operating according to orders. When each heating furnace operates, the corresponding waste heat boiler continuously produces steam. The steam production of each heating furnace waste heat boiler is determined according to the size of the heating furnace, and can generally reach 4-10 t / h.

[0034] When a special steel is smelted by a vacuum refining device, for example, an RH / VD vacuum refining device is frequently used, and the average smelting cycle of one furnace is 30 minutes. A low-pressure superheated steam is used to vacuumize for a period of time, for example, about 15 minutes, in the middle of the process. The pressure of the low-pressure superheated steam is generally less than or equal to 1.0 MPa, and the steam flow is determined according to the size of the RH / VD vacuum refining device.

[0035] The inlet of the steam compressor 2 is connected with the outlet of the waste heat boiler drum 1 through the first pipeline 5. The outlet of the steam compressor 2 is connected with the high-pressure gas inlet of the steam vacuumizing device 3 through the second pipeline 6 with the first valve device 61. By arranging the steam compressor 2, the problems of low steam pressure and saturated water overheating of the waste heat boiler drum 1 of the heating furnace of the rolling mill plant are solved. The steam of the waste heat boiler drum 1 of the heating furnace of the rolling mill plant enters the steam compressor 2, the steam compressor 2 consumes part of the electric energy, increases the steam pressure, changes the saturated steam into superheated steam, and inputs the superheated steam into the high-pressure gas inlet of the steam vacuumizing device 3 of the vacuum refining device of the electric furnace steelmaking plant through the second pipeline 6, so as to meet the requirements of the steam pressure and temperature for vacuum refining. In the above manner, the problems of low waste heat steam pressure of the waste heat boiler of the heating furnace of the rolling mill plant, low-efficiency use or even waste by emission are solved, the efficient use of the waste heat steam of the waste heat boiler of the heating furnace of the rolling mill plant is realized, and the value of the rolling mill steam is improved. In addition, the problem that the vacuum refining device of the electric furnace steelmaking plant cannot obtain a large amount of low-pressure superheated steam at low cost for vacuumizing is also solved. By the steam compressor 2, the steam pressure is increased, and the steam is superheated, which achieves two purposes at one time.

[0036] In order to solve the problem that the steam production of the waste heat boiler drum 1 of the heating furnace of the rolling mill plant and the steam use of the vacuum refining device are not synchronized, as a feasible solution, the superheating heat supply system comprises a heat accumulator 4 connected with the steam compressor 2 in parallel. The heat accumulator 4 can be a high-pressure resistant container. The first port of the heat accumulator 4 is connected with the outlet of the steam compressor 2 through the third pipeline 7 with the second valve device 71. The second port of the heat accumulator 4 is connected with the first pipeline 5 through the fourth pipeline 8 with the third valve device 81.

[0037] The superheating heat supply system has a first working state. In the first working state, the inlet of the steam compressor 2 is in communication with the outlet of the waste heat boiler drum 1, the outlet of the steam compressor 2 is in communication with the high-pressure gas inlet of the steam vacuum device 3, the steam compressor 2 is in an open state, the accumulator 4 is disconnected from the outlet of the waste heat boiler drum 1, and the accumulator 4 is disconnected from the high-pressure gas inlet of the steam vacuum device 3. When the instantaneous value of the waste heat steam output of the waste heat boiler of the steel rolling workshop heating furnace is greater than or equal to the instantaneous value of the steam used by the vacuum refining device, the superheating heat supply system can enter the first working state. The accumulator 4 can not be put into use, and the steam generated by the waste heat boiler drum 1 is directly used for vacuumizing the steam vacuum device 3 after being superheated by the steam compressor 2.

[0038] As a possibility, the superheating heat supply system can include a low-pressure steam pipe network 9, which can be in communication with the outlet of the waste heat boiler drum 1. The low-pressure steam pipe network 9 can be connected with the first pipeline 5 through a fourth valve device 91. In the first working state, the outlet of the waste heat boiler drum 1 can be in communication with the low-pressure steam pipe network 9, and the excess steam of the waste heat boiler drum 1 of the steel rolling workshop heating furnace is sent to the low-pressure steam pipe network 9 for other production and life users through the fourth valve device 91.

[0039] The superheating heat supply system can have a second working state. In the second working state, the steam compressor 2 is in an open state, the accumulator 4 is in communication with the outlet of the steam compressor 2, the inlet of the steam compressor 2 is in communication with the outlet of the waste heat boiler drum 1, the outlet of the steam compressor 2 is disconnected from the high-pressure gas inlet of the steam vacuum device 3, the accumulator 4 is disconnected from the high-pressure gas inlet of the steam vacuum device 3, and the inlet of the steam compressor 2 is disconnected from the accumulator 4.

[0040] The superheating heat supply system can have a third working state. In the third working state, the inlet of the steam compressor 2 is in communication with the outlet of the waste heat boiler drum 1, the outlet of the steam compressor 2 is in communication with the high-pressure gas inlet of the steam vacuum device 3, the steam compressor 2 is in an open state, the accumulator 4 is in communication with the inlet of the steam compressor 2, and the accumulator 4 is disconnected from the outlet of the steam compressor 2.

[0041] When the instantaneous value of the waste heat steam production of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill is less than the instantaneous value of the steam for the vacuum refining device, but the average flow of the waste heat steam of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill is greater than or equal to the average flow of the steam for the vacuum refining device, from the steam balance, the steam production of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill generally meets the steam consumption of the vacuum refining device, and the regenerator 4 needs to be put into use. When the vacuum refining device needs steam, the superheated heat supply system enters the third working state, and the steam produced by the waste heat boiler steam drum 1 of the heating furnace of the rolling mill and the steam output by the regenerator 4 are pressurized and superheated by the steam compressor 2 and then supplied to the vacuum refining device.

[0042] Before the steam for the vacuum refining device, the superheated heat supply system first enters the second working state. The steam of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill is first pressurized by the steam compressor 2 to heat the regenerator 4, at this time, the first valve device 61 of the second pipeline 6 is closed, and the second valve device 71 of the third pipeline 7 is opened. After the regenerator 4 is heated, the second valve device 71 is closed. When the vacuum refining device uses steam, the first valve device 61 of the second pipeline 6 is opened, the third valve device 81 of the fourth pipeline 8 is opened, and the steam of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill and the steam output by the regenerator 4 are pressurized and superheated by the steam compressor 2 and then supplied to the vacuum refining device. Further, the excess steam of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill can be sent to the low-pressure steam pipe network 9 (about 0.3-0.7 MP A ) for other production and life users.

[0043] When the vacuum refining device finishes vacuumizing one furnace and stops using steam, the first valve device 61 and the second valve device 71 are closed, and the steam of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill is pressurized by the steam compressor 2 and then heated to the regenerator 4 again. In this way, during the intermittent use of the vacuum refining device, the regenerator 4 is heated; when the vacuum refining device uses steam, the regenerator 4 is cooled.

[0044] By arranging the regenerator 4, the problem of asynchronization between the waste heat steam of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill and the steam for the vacuum refining device is solved, so that the small and continuous steam of the waste heat boiler steam drum 1 of the heating furnace of the rolling mill meets the steam requirement of the large and intermittent vacuum refining device. In addition, the problem of charging and discharging pressure difference of the regenerator 4 is also solved, and the heat storage efficiency is improved. After the steam is pressurized by the steam compressor 2, it can be used for steam for the vacuum refining device, and the pressurized steam can also be charged into the regenerator 4, so that the regenerator 4 has a high charging pressure, thereby having a certain charging and discharging pressure difference, and realizing the charging and discharging functions of the regenerator 4.

[0045] The superheating heating system can have a fourth working state. In the fourth working state, the inlet of the steam compressor 2 is in communication with the outlet of the waste heat boiler drum 1, the outlet of the steam compressor 2 is in communication with the high-pressure gas inlet of the steam vacuum device 3, the low-pressure steam pipe network 9 is in communication with the inlet of the steam compressor 2, and the steam compressor 2 is in an open state; the accumulator 4 is disconnected from the outlet of the waste heat boiler drum 1, and the accumulator 4 is disconnected from the high-pressure gas inlet of the steam vacuum device 3.

[0046] When the steam production of the waste heat boiler drum 1 of the heating furnace of the rolling mill is less than the average flow of the steam for the vacuum refining device, the steam of the waste heat boiler drum 1 of the heating furnace of the rolling mill is insufficient, at this time, the superheating heating system can enter the fourth working state. The fourth valve device 91 is opened, and the low-pressure steam network steam and the steam of the waste heat boiler drum 1 of the heating furnace of the rolling mill are pressurized and superheated by the steam compressor 2 and then supplied to the vacuum refining device. At this time, the accumulator 4 can not be put into use.

[0047] The low-pressure steam pipe network 9 can receive the steam of the waste heat boiler drum 1 of the heating furnace of the rolling mill, and can also send back the steam when the steam of the waste heat boiler drum 1 of the heating furnace of the rolling mill does not meet the steam demand of the vacuum refining device, and the steam and the steam of the waste heat boiler drum 1 of the heating furnace of the rolling mill are pressurized and superheated by the steam compressor 2 and then supplied to the vacuum refining device.

[0048] As a feasible solution, the steam compressor 2 can be a variable frequency steam compressor 2. In this way, electric energy can be saved, the steam compressor 2 is operated in variable frequency, and the total steam quantity entering the accumulator 4 for heating can meet the steam demand of the vacuum refining device.

[0049] As a feasible solution, when the steam superheating degree of the outlet of the steam compressor 2 is too high, the water injection cooling method can be used to adjust the temperature to meet the requirement of slightly superheated steam for the vacuum refining device.

[0050] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An overheat heating system, characterized by, The superheating heat supply system comprises: a waste heat boiler drum for a heating furnace of a steel rolling plant; a steam compressor, an inlet of which is in communication with an outlet of the waste heat boiler drum; a steam vacuumizing device for a vacuum refining device of an electric furnace steelmaking plant, a high-pressure gas inlet of the steam vacuumizing device being in communication with an outlet of the steam compressor, and a suction port of the steam vacuumizing device being in communication with an inside of a furnace body of the vacuum refining device.

2. The superheat heating system of claim 1, wherein, The superheating heat supply system comprises: a regenerator, which is connected in parallel with the steam compressor.

3. The superheat heating system of claim 2, wherein, The superheating heat supply system has a first working state, in which the inlet of the steam compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the steam compressor is in communication with the high-pressure gas inlet of the steam vacuumizing device, the steam compressor is in an open state, the regenerator is disconnected from the outlet of the waste heat boiler drum, and the regenerator is disconnected from the high-pressure gas inlet of the steam vacuumizing device.

4. The superheat heating system of claim 2, wherein, The superheating heat supply system has a second working state, in which the steam compressor is in an open state, the regenerator is in communication with the outlet of the steam compressor, the inlet of the steam compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the steam compressor is disconnected from the high-pressure gas inlet of the steam vacuumizing device, the regenerator is disconnected from the high-pressure gas inlet of the steam vacuumizing device, and the inlet of the steam compressor is disconnected from the regenerator.

5. The superheat heating system of claim 4, wherein, The superheating heat supply system has a third working state, in which the inlet of the steam compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the steam compressor is in communication with the high-pressure gas inlet of the steam vacuumizing device, the steam compressor is in an open state, the regenerator is in communication with the inlet of the steam compressor, and the regenerator is disconnected from the outlet of the steam compressor.

6. The superheat heating system of claim 2, wherein, The superheating heat supply system comprises: a low-pressure steam pipe network, which is in communication with the outlet of the waste heat boiler drum.

7. The superheat heating system of claim 6, wherein, The superheating heat supply system has a first working state, in which the inlet of the steam compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the steam compressor is in communication with the high-pressure gas inlet of the steam vacuumizing device, the steam compressor is in an open state, the regenerator is disconnected from the outlet of the waste heat boiler drum, the regenerator is disconnected from the high-pressure gas inlet of the steam vacuumizing device, and the outlet of the waste heat boiler drum is in communication with the low-pressure steam pipe network.

8. The superheat heating system of claim 6, wherein, The superheating heat supply system has a fourth working state, in which the inlet of the steam compressor is in communication with the outlet of the waste heat boiler drum, the outlet of the steam compressor is in communication with the high-pressure gas inlet of the steam vacuumizing device, the low-pressure steam pipe network is in communication with the inlet of the steam compressor, and the steam compressor is in an open state; the regenerator is disconnected from the outlet of the waste heat boiler drum, and the regenerator is disconnected from the high-pressure gas inlet of the steam vacuumizing device.

9. The superheat heating system of claim 1, wherein, The steam compressor is a variable-frequency steam compressor.

10. The superheat heating system of claim 2, wherein, The inlet of the vapor compressor is connected to the outlet of the waste heat boiler drum by a first line; The outlet of the vapor compressor is connected to the high pressure gas inlet of the vapor evacuation device by a second line having a first valve device; The first port of the accumulator is connected to the outlet of the vapor compressor by a third line having a second valve device; The second port of the accumulator is connected to the first line by a fourth line having a third valve device.

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