Hot press steam supply system

Abstract

The present invention discloses a steam supply system for a hot compressor, which comprises a heat storage device, a hot compressor, a heat exchanger and a water supply pipeline, wherein the hot compressor has a power steam inlet connected to a power steam pipeline, an ejection steam inlet connected to an ejection steam pipeline and an external steam supply outlet connected to an external steam supply pipeline, the first side of the heat exchanger exchanges heat with the heat storage device, the second side of the heat exchanger is connected to the hot compressor through the power steam pipeline, the water supply pipeline is connected to the second side of the heat exchanger, and a variable frequency water supply pump is installed on the water supply pipeline. The steam supply system for a hot compressor provided by the present invention efficiently and stably generates power steam, and has the advantages of high safety and stable operation.

Description

Technical Field

[0001] The invention relates to the technical field of hot presses, and in particular to a steam supply system for a hot press. Background Art

[0002] With the continuous development of the economy and society, the demand for energy is increasing day by day, and the pollution of fossil energy is becoming more and more serious. The country encourages clean energy power generation and heating. At present, thermal power plants directly discharge this part of low-grade steam, which wastes part of the heat energy and will cause visual pollution, affecting the corporate image. It is imperative to develop clean and renewable energy. At present, the power steam of the hot compressor is generally used to inject low-pressure and low-grade steam for energy-saving recovery. However, under high load, the power steam of the power plant is too high and needs to be throttled and decompressed, wasting energy. Under low load, the power steam pressure is too low and low-pressure steam cannot be injected. The exhaust steam may be intermittent or discontinuous. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a steam supply system for a hot compressor, which can generate power steam efficiently and stably and has the advantages of high safety and stable operation.

[0005] According to the hot compressor steam supply system of an embodiment of the present invention, the hot compressor steam supply system includes a heat storage device, a hot compressor, a heat exchanger and a water supply pipe, the hot compressor has a motive steam inlet connected to the motive steam pipe, an ejection steam inlet connected to the ejection steam pipe and an external steam supply outlet connected to the external steam supply pipe, the first side of the heat exchanger exchanges heat with the heat storage device, the second side of the heat exchanger is connected to the hot compressor through the motive steam pipe, the water supply pipe is connected to the second side of the heat exchanger, and a variable frequency water supply pump is installed on the water supply pipe.

[0006] The steam supply system for a hot compressor according to an embodiment of the present invention can generate power steam efficiently and stably, and has the advantages of high safety and stable operation.

[0007] In some embodiments, the heat storage device includes a high-temperature heat storage tank and a low-temperature heat storage tank, the outlet of the low-temperature heat storage tank is connected to the inlet of the high-temperature heat storage tank through a low-temperature heat storage pump, the outlet of the high-temperature heat storage tank is connected to the medium inlet of the first side of the heat exchanger through a high-temperature heat storage pump, and the inlet of the low-temperature heat storage tank is connected to the medium outlet of the first side of the heat exchanger.

[0008] In some embodiments, the heat storage medium of the high-temperature heat storage tank and the low-temperature heat storage tank is any one of molten salt, heat-conducting oil and heat-conducting particles.

[0009] In some embodiments, a heater is provided in the high-temperature heat storage tank.

[0010] In some embodiments, the heater is heated by any one of electric heating, flue gas heating and steam heating.

[0011] In some embodiments, the hot compressor steam supply system also includes a control mechanism and a monitoring mechanism, the control mechanism is electrically connected to the variable frequency water feed pump and the high temperature heat storage pump, and the control mechanism controls the variable frequency water feed pump and the high temperature heat storage pump according to data from the monitoring mechanism.

[0012] In some embodiments, the monitoring mechanism includes a pressure sensor and a temperature sensor, and the pressure sensor and the temperature sensor are installed at the motive steam inlet.

[0013] In some embodiments, the pressure sensor is electrically connected to the variable frequency feed water pump, and the pressure sensor is installed at one end of the motive steam pipeline adjacent to the motive steam inlet.

[0014] In some embodiments, the second side water supply inlet of the heat exchanger is connected to the water supply pipe, the second side steam outlet of the heat exchanger is connected to the power steam pipe through an outlet pipe, and the temperature sensor is installed on the outlet pipe.

[0015] In some embodiments, a temperature reducing and pressure reducing valve is provided on the outlet pipeline, and the temperature reducing and pressure reducing valve is connected in parallel with the power steam pipeline, and the temperature reducing and pressure reducing valve is used to adjust the pressure and temperature of the steam in the outlet pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the steam supply system of the hot press according to an embodiment of the present invention.

[0017] Figure numerals: 100, hot press; 101, power steam inlet; 102, induced steam inlet; 200, heat storage device; 210, low-temperature heat storage tank; 211, low-temperature heat storage tank inlet; 212 low-temperature heat storage tank outlet; 213, low-temperature heat storage pump; 220, high-temperature heat storage tank; 221 high-temperature heat storage tank outlet; 222, high-temperature heat storage tank inlet; 223, high-temperature heat storage pump; 224, heater; 300, heat exchanger; 301, medium inlet; 302, medium outlet; 303, second side water supply inlet; 304, second side steam outlet; 4, water supply pipeline; 41, variable frequency water supply pump; 5, induced steam pipeline; 6, external steam supply pipeline; 7, pressure sensor; 8, temperature sensor; 9, outlet pipeline; 91, temperature reduction and pressure relief valve; 10, power steam pipeline. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] According to the steam supply system of the hot press machine of the embodiment of the present invention, Figure 1 As shown, the steam supply system of the hot compressor includes a heat storage device 200, a hot compressor 100, a heat exchanger 300 and a water supply pipe 4. The hot compressor 100 has a motive steam inlet 101 connected to the motive steam pipe 10, an ejection steam inlet 102 connected to the ejection steam pipe 5 and an external steam outlet connected to the external steam pipe 6. The first side of the heat exchanger 300 exchanges heat with the heat storage device 200, the second side of the heat exchanger 300 is connected to the hot compressor 100 through the motive steam pipe 10, the water supply pipe 4 is connected to the second side of the heat exchanger 300, and a variable frequency water supply pump 41 is installed on the water supply pipe 4. The present invention utilizes the heat storage device 200 to heat the water in the water supply pipe 4, and the heat storage device 200 and the heat exchanger 300 cooperate to generate stable high-pressure steam, thereby improving the safety of the steam supply system. The hot compressor 100 ejects low-pressure and low-grade steam through stable motive steam to provide external steam with higher pressure and temperature. The variable frequency water supply pump 41 changes the pressure of the water supply pipe 4. When the load is high, the variable frequency water supply pump 41 generates a pressure that meets the power steam demand of the heat compressor, avoiding the over-high pressure steam provided for further temperature and pressure reduction. When the load is low, an independent variable frequency pump can be used to maintain the power steam of the heat compressor 100 at a higher pressure, so that the heat compressor 100 can operate at a higher performance.

[0020] The steam supply system for the hot compressor according to the embodiment of the present invention has the advantages of efficiently and stably generating power steam, high safety and stable operation.

[0021] In some embodiments, Figure 1 As shown, the heat storage device 200 includes a high-temperature heat storage tank 220 and a low-temperature heat storage tank 210, the low-temperature heat storage tank outlet 212 is connected to the high-temperature heat storage tank inlet 222 through a low-temperature heat storage pump 213, the high-temperature heat storage tank outlet 221 is connected to the medium inlet 301 of the first side of the heat exchanger 300 through the high-temperature heat storage pump 223, and the low-temperature heat storage tank inlet 211 is connected to the medium outlet 302 of the first side of the heat exchanger 300.

[0022] Specifically, the heat storage medium in the high-temperature heat storage tank 220 exchanges heat with the heat exchanger 300 to increase the temperature of the power steam on the second side of the heat exchanger 300, and the low-temperature heat storage tank 210 stores the heat of the heat storage medium with a lower temperature refluxed from the heat exchanger 300 to reduce heat energy loss.

[0023] In some embodiments, the heat storage medium of the high-temperature heat storage tank 220 and the low-temperature heat storage tank 210 is any one of molten salt, heat-conducting oil and heat-conducting particles.

[0024] Therefore, the high-temperature heat storage tank and the low-temperature heat storage tank can utilize sensible heat, phase change latent heat and two-phase comprehensive heat by changing the heat storage medium to improve the heat storage capacity of the heat storage device.

[0025] In some embodiments, Figure 1 As shown, a heater 224 is provided in the high temperature heat storage tank 220 .

[0026] As a result, the heater replenishes heat into the high-temperature heat storage tank, allowing the high-temperature heat storage tank to maintain a stable heating capacity in an emergency.

[0027] In some embodiments, the heater 224 is heated by any one of electric heating, flue gas heating and steam heating.

[0028] Therefore, the heater adopts electric heating with high heating efficiency, and the flue gas heating and steam heating can be coordinated with boilers to reduce electricity consumption and improve thermal energy utilization efficiency.

[0029] In some embodiments, the hot compressor steam supply system also includes a control mechanism and a monitoring mechanism. The control mechanism is electrically connected to the variable frequency water supply pump 41 and the high temperature heat storage pump 223. The control mechanism controls the variable frequency water supply pump 41 and the high temperature heat storage pump 223 according to the data of the monitoring mechanism.

[0030] Specifically, the monitoring mechanism detects the state parameters of the hot press 100, and the control mechanism controls the variable frequency water supply pump 41 to change the pressure of the water supply pipeline 4 according to the data of the monitoring mechanism to adjust the power steam pressure, and controls the high-temperature heat storage pump 223 to adjust the flow rate of the heat storage medium of the high-temperature heat storage tank 220 entering the heat exchanger 300 to adjust the power steam temperature.

[0031] In some embodiments, Figure 1 As shown, the monitoring mechanism includes a pressure sensor 7 and a temperature sensor 8 , and the pressure sensor 7 and the temperature sensor 8 are installed at the power steam inlet 101 .

[0032] Therefore, the control mechanism controls the variable frequency water supply pump to adjust the pressure of the motive steam according to the data of the pressure sensor, and the control mechanism controls the high temperature heat storage pump to adjust the temperature of the motive steam according to the data of the temperature sensor.

[0033] In some embodiments, the variable frequency water supply pump 41 has a water supply inlet and a water supply outlet. The water supply inlet is connected to the water supply pipe 4 , and the water supply outlet is connected to the second side of the heat exchanger 300 .

[0034] Thus, the variable frequency feed water pump adjusts the pressure entering the second side of the heat exchanger, and the water enters the heat exchanger to exchange heat and generate power steam.

[0035] In some embodiments, Figure 1 As shown, the pressure sensor 7 is electrically connected to the variable frequency feed water pump 41 , and the pressure sensor 7 is installed at one end of the power steam pipeline 10 adjacent to the power steam inlet 101 .

[0036] Specifically, the pressure sensor 7 is installed on a power steam pipe 10 connected to the hot press 100 , one end of the power steam pipe 10 is connected to the outlet pipe 9 , and the other end of the power steam pipe 10 is connected to the hot press 100 . The outlet pipe 9 is connected to the second side of the heat exchanger 300 .

[0037] In some embodiments, Figure 1 As shown, the second side water supply inlet 303 of the heat exchanger 300 is connected to the water supply pipe 4 , the second side steam outlet 304 of the heat exchanger 300 is connected to the power steam pipe 10 through the outlet pipe 9 , and the temperature sensor 8 is installed on the outlet pipe 9 .

[0038] Specifically, after the motive steam at the second side steam outlet 304 of the heat exchanger 300 enters the outlet pipe 9, it can flow into the motive steam pipe 10 or flow out of the steam supply system along the outlet pipe 9. The temperature sensor 8 is installed at one end of the outlet pipe 9 away from the connection between the motive steam pipe 10 and the outlet pipe 9.

[0039] In some embodiments, Figure 1 As shown, a temperature reducing and pressure reducing valve 91 is provided on the outlet pipeline 9 , and the temperature reducing and pressure reducing valve 91 is connected in parallel with the power steam pipeline 10 . The temperature reducing and pressure reducing valve 91 is used to adjust the pressure and temperature of the steam in the outlet pipeline 9 .

[0040] Specifically, the temperature-reducing and pressure-reducing valve 91 is opened to discharge the motive steam to reduce the pressure and temperature of the motive steam in the outlet pipe 9 , and the temperature-reducing and pressure-reducing valve 91 is connected in parallel with the motive steam pipe 10 to reduce the impact on the hot press 100 .

[0041] In some embodiments, the ejector steam pipeline 5 is connected to a low-pressure, low-grade steam source, which is exhaust steam and spent steam from thermal power plants and chemical plants.

[0042] Therefore, the ejector steam pipeline utilizes low-pressure and low-grade steam source, which improves heat utilization efficiency and reduces waste.

[0043] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A steam supply system for a hot press, characterized in that: include: Heat storage device; A hot press, the hot press having a motive steam inlet connected to the motive steam pipeline, an ejector steam inlet connected to the ejector steam pipeline, and an external steam outlet connected to the external steam pipeline; a heat exchanger, wherein a first side of the heat exchanger exchanges heat with the heat storage device, and a second side of the heat exchanger is connected to the hot compressor through the power steam pipeline; and A water supply pipeline, the water supply pipeline is connected to the second side of the heat exchanger, and a variable frequency water supply pump is installed on the water supply pipeline; The heat storage device comprises a high-temperature heat storage tank and a low-temperature heat storage tank, the outlet of the low-temperature heat storage tank is connected to the inlet of the high-temperature heat storage tank through a low-temperature heat storage pump, the outlet of the high-temperature heat storage tank is connected to the medium inlet of the first side of the heat exchanger through a high-temperature heat storage pump, and the inlet of the low-temperature heat storage tank is connected to the medium outlet of the first side of the heat exchanger; The heat storage medium of the high-temperature heat storage tank and the low-temperature heat storage tank is any one of molten salt, heat-conducting oil and heat-conducting particles; A heater is provided in the high-temperature heat storage tank; The heater is heated by any one of electric heating, flue gas heating and steam heating; The steam supply system of the hot compressor also includes a control mechanism and a monitoring mechanism, wherein the control mechanism is electrically connected to the variable frequency water supply pump and the high temperature heat storage pump, and the control mechanism controls the variable frequency water supply pump and the high temperature heat storage pump according to data from the monitoring mechanism; The monitoring mechanism includes a pressure sensor and a temperature sensor, and the pressure sensor and the temperature sensor are installed at the power steam inlet; The pressure sensor is electrically connected to the variable frequency feed water pump, and the pressure sensor is installed at one end of the power steam pipeline adjacent to the power steam inlet; The second side water supply inlet of the heat exchanger is connected to the water supply pipeline, the second side steam outlet of the heat exchanger is connected to the power steam pipeline through an outlet pipeline, and the temperature sensor is installed on the outlet pipeline; The outlet pipeline is provided with a temperature reducing and pressure reducing valve, which is connected in parallel with the power steam pipeline and is used to adjust the pressure and temperature of the steam in the outlet pipeline.

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