Steam energy-saving system of steam autoclave

Abstract

This application provides a steam energy-saving system for an autoclave, including an automatic steam distribution and reversing device, a heat energy utilization device, a condensate drain device, and a control cabinet. The automatic steam distribution and reversing device includes an autoclave, an autoclave inlet steam distribution cylinder, and an autoclave reversing steam distribution cylinder. Both the autoclave inlet steam distribution cylinder and the autoclave reversing steam distribution cylinder are equipped with regulating valves, which are connected to the autoclave. The heat energy utilization device includes a heat exchanger, one end of which is connected to a main condensate pipe, and the other end is connected to a soft water station. The condensate drain device is located at the bottom of the autoclave and is connected to the heat exchanger via the main condensate pipe. The control cabinet is electrically connected to both the automatic steam distribution and reversing device and the condensate drain device. This application features a simpler structure, fully automated processing, reduced labor costs, higher safety, and greater energy efficiency and environmental friendliness, saving at least 15% of steam.

Description

Technical Field

[0001] This application relates to the field of energy-saving and environmental protection technology, and in particular to a steam energy-saving system for an autoclave. Background Technology

[0002] An autoclave is a large pressure vessel with a large volume and weight. The autoclave uses a pressure transmitter to measure the steam pressure inside the vessel, thereby determining whether to open or close the steam valve to maintain a constant pressure inside the autoclave. This allows the materials to complete the reaction under high pressure conditions. It is widely used for the autoclaving of building materials such as aerated concrete blocks, sand-lime bricks, fly ash bricks, and thermal insulation asbestos boards.

[0003] In existing technologies, not all steam distribution and exhaust valves on autoclaves can be automatically controlled. A large number of valves still require manual operation, which is labor-intensive and may lead to various safety hazards if not operated properly, resulting in a low safety factor. Furthermore, the waste steam discharged during the autoclave depressurization process carries a certain pressure and high temperature, which has great thermal energy utilization value. Direct discharge does not allow the waste steam in the autoclave to be utilized, resulting in serious waste of steam and thermal energy resources and significant environmental pollution in the processing plant. In addition, existing technologies use flash tanks to recover and utilize the waste heat of the autoclave, but this method does not fully utilize the thermal energy, and the operation methods and equipment are too complicated. Summary of the Invention

[0004] This application provides a steam energy-saving system for autoclaves to solve the problems in the prior art where autoclaves cannot fully realize automatic steam distribution and exhaust, and where waste steam and heat energy inside the autoclave are seriously wasted, which will cause certain environmental pollution.

[0005] This application discloses a steam energy-saving system for an autoclave, comprising:

[0006] An automatic steam distribution and reversing device includes an autoclave, an autoclave steam inlet distribution cylinder, and an autoclave reversing distribution cylinder. Both the autoclave steam inlet distribution cylinder and the autoclave reversing distribution cylinder are equipped with regulating valves and are connected to the autoclave through the regulating valves.

[0007] A heat energy utilization device, the heat energy utilization device including a heat exchanger, one end of the heat exchanger being connected to the main condensate pipeline and the other end being connected to a soft water station;

[0008] A condensate draining device is provided at the bottom of the autoclave and is connected to the heat exchanger via the main condensate pipe.

[0009] The control cabinet is electrically connected to both the automatic steam distribution and reversing device and the condensate drain device.

[0010] In a preferred embodiment of this application, the automatic steam distribution and reversing device further includes an air venting valve assembly, which is disposed on the autoclave and is used to vent the air inside the autoclave.

[0011] In a preferred embodiment of this application, the automatic steam distribution and reversing device further includes a drying valve group, which is disposed on the sealed steam inlet pipe of the autoclave and is used to discharge moisture in the sealed steam inlet pipe of the autoclave.

[0012] In a preferred embodiment of this application, the drying valve assembly includes a bellows stop valve, a steam-water separator, and a drain valve. Bellows stop valves are provided on both sides of the steam-water separator, and bellows stop valves are provided on both sides of the drain valve. The drain valve is connected to the steam-water separator through the bellows stop valves.

[0013] Using the above technical solution, when the steam-water separator malfunctions, the bellows shut-off valves on both sides of the steam-water separator can be closed, and the bypass bellows shut-off valve can be opened, thus completing the maintenance of the steam-water separator without affecting production.

[0014] In a preferred embodiment of this application, the condensate drain device includes a first ball valve, a first switching valve, a filter, a second ball valve, a third ball valve, a low-temperature drain valve, a high-temperature drain valve, a first check valve, a check valve, a fourth ball valve, a second switching valve, and a fifth ball valve. The autoclave is connected to the first switching valve via the first ball valve. The first switching valve is connected to the filter. The filter is connected to the second ball valve. The filter is connected to the low-temperature drain valve via the third ball valve. The filter is also connected to the high-temperature drain valve. The high-temperature drain valve is connected to the first check valve and the check valve. The first check valve is connected to the fourth ball valve. The fourth ball valve is connected to the main condensate pipeline. The first switching valve is connected to the control cabinet. The autoclave is connected to the second switching valve via the fifth ball valve. The second switching valve is connected to the autoclave's exhaust steam main pipe. The second switching valve is also connected to the control cabinet.

[0015] In a preferred embodiment of this application, the filter is a Y-type filter, one end of the Y-type filter is connected to the first switching valve, the other end of the Y-type filter is connected to the second ball valve, and the third end of the Y-type filter is connected to the third ball valve and the high-temperature steam trap.

[0016] By adopting the above technical solution, the sewage discharge performance is enhanced by the filter, preventing the steam trap from being blocked by sewage. The inspection valve can check the condition of the steam trap, and when the steam trap malfunctions, it can be detected and replaced in time, resulting in better drainage performance. The check valve can prevent interference from other autoclaves.

[0017] In a preferred embodiment of this application, a regulating valve and a second check valve are provided on the main condensate pipeline. The regulating valve is connected to the condensate drain device, and the second check valve is connected to the heat exchanger.

[0018] In a preferred embodiment of this application, the heat energy utilization device further includes a third check valve, a gate valve, a sixth ball valve, and a thermometer. The end of the heat exchanger away from the main condensate pipe is sequentially connected to the third check valve and the gate valve. The gate valve is connected to the thermometer through the sixth ball valve, and the gate valve is also connected to the boiler.

[0019] In a preferred embodiment of this application, the control cabinet is connected to the autoclave inlet steam distribution cylinder and the autoclave outlet steam distribution cylinder via regulating valves.

[0020] By adopting the above technical solution, the control cabinet can control the regulating valves connected to each autoclave, thereby automatically controlling the autoclave steam inlet distribution cylinder and the autoclave steam outlet distribution cylinder to complete the automatic steam distribution and steam outlet process.

[0021] The steam energy-saving system for an autoclave provided in this application has the following advantages compared with the prior art:

[0022] (1) This application can automatically control the regulating valves connected to each autoclave through the control cabinet to complete the automatic steam distribution and reversal process of the autoclave. It fully realizes the automation of steam distribution and reversal of the autoclave, eliminating the need to rely on manual operation to open the regulating valves on the autoclave. This makes operation more convenient, saves labor costs, avoids the possibility of burns during manual operation, and has a higher safety factor.

[0023] (2) This application sets up a drying valve group on the sealed steam inlet pipe of the autoclave, which can separate steam and water through the steam-water separator in the drying valve group and discharge water in the steam through the drain valve in the drying valve group, while preventing steam leakage, thereby ensuring that the steam entering each autoclave is free of moisture. Furthermore, when the steam-water separator malfunctions, the steam-water separator can be repaired by closing the bellows shut-off valves on both sides of the steam-water separator.

[0024] (3) By installing a condensate drain device on the autoclave, this application can improve the autoclave's air discharge, sewage discharge, drainage and steam leakage prevention performance. In addition, the first check valve in the condensate drain device can also prevent interference from other autoclaves, and the inspection valve can test the performance of the high temperature drain valve, thereby ensuring the smooth discharge of condensate.

[0025] (4) The heat energy utilization device of this application heats the soft water from the soft water station by using the temperature of the condensate in the main condensate pipe and then transports the heated soft water to the boiler room. It can fully utilize the heat energy of the condensate and transport the condensate with the heat energy utilized to the pulping workshop for pulping. It is more energy-saving and environmentally friendly, and can save at least 15% of steam, which greatly saves processing costs. Attached Figure Description

[0026] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of a steam energy-saving system for an autoclave according to this application;

[0028] Figure 2 This is a schematic diagram of the condensate drain device in the steam energy-saving system of an autoclave according to this application;

[0029] Figure 3 This is a schematic diagram of the drying valve group in the automatic steam distribution and reversing device of the steam energy-saving system of an autoclave according to this application;

[0030] Figure 4 This is a schematic diagram of the thermal energy utilization device of the steam energy-saving system of an autoclave according to this application;

[0031] Explanation of reference numerals in the attached figures:

[0032] 101-Autoclave; 102-Autoclave inlet steam distribution cylinder; 103-Autoclave outlet steam distribution cylinder; 104-Regulating valve; 105-Air vent valve assembly; 106-Drying valve assembly; 1060-Bellbellows shut-off valve; 1061-Steam-water separator; 1062-Drain valve; 200-Condensate drain device; 201-First ball valve; 202-First on / off valve; 203-Filter; 204-Second ball valve; 205-Third... Ball valve, 206-low temperature steam trap, 207-high temperature steam trap, 208-first check valve, 209-inspection valve, 210-fourth ball valve, 211-second on / off valve, 212-fifth ball valve; 301-heat exchanger, 302-third check valve, 303-gate valve, 304-sixth ball valve, 305-thermometer; 400-main condensate pipe, 401-regulating valve, 402-second check valve; 500-control cabinet. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of the embodiments of this application, it should be noted that the terms "upper", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0039] Based on the exemplary embodiments described in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the appended claims. Furthermore, although the disclosures in this application are presented by way of one or more exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete implementation on its own.

[0040] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0041] The terms "first," "second," "third," "fourth," "fifth," and "sixth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise indicated. It should be understood that such terms can be used interchangeably where appropriate, for example, to implement the application in a sequence other than those given in the embodiments illustrated or described in this application. Furthermore, the same name in the embodiments of this application may have different reference numerals only to distinguish its position in various devices or to illustrate its connection relationship with other components; these should be understood to be interchangeable where appropriate and do not constitute a limitation on the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating the overall technical solution of this application. The unclear parts of the valves in the drawings are all well-known to those skilled in the art, and the unclear structure of some related valves does not affect the overall technical solution of this application.

[0042] Furthermore, the terms “comprising” and “equipped with”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0043] Example

[0044] See Figure 1 This is a schematic diagram of the overall structure of a steam energy-saving system for an autoclave. The steam energy-saving system for an autoclave provided in this application includes:

[0045] An automatic steam distribution and reversing device includes an autoclave 101, an autoclave steam inlet distribution cylinder 102, and an autoclave reversing distribution cylinder 103. Both the autoclave steam inlet distribution cylinder 102 and the autoclave reversing distribution cylinder 103 are equipped with regulating valves 104, and are connected to the autoclave 101 through the regulating valves 104.

[0046] A heat energy utilization device, the heat energy utilization device including a heat exchanger 301, one end of the heat exchanger 301 being connected to the main condensate pipe 400 and the other end being connected to a soft water station;

[0047] A condensate draining device 200 is provided at the bottom of the autoclave 101 and is connected to the heat exchanger 301 through the main condensate pipe 400.

[0048] The control cabinet 500 is electrically connected to both the automatic steam distribution and reversing device and the condensate drain device 200.

[0049] The automatic steam distribution and reversing device also includes a drying valve assembly 106, such as... Figure 1 As shown, the drying valve assembly 106 is installed on the sealed steam inlet pipe of the autoclave 101 and is used to discharge the moisture in the sealed steam inlet pipe of the autoclave 101.

[0050] See also Figure 1 The control cabinet 500 is connected to the autoclave inlet steam distribution cylinder 102 and the autoclave outlet steam distribution cylinder 103 via regulating valves 104.

[0051] By adopting the above technical solution, the control cabinet 500 can control the regulating valves 104 connected to each autoclave 101, thereby automatically controlling the autoclave steam inlet distribution cylinder 102 and the autoclave steam outlet distribution cylinder 103 to complete the automatic steam distribution and steam outlet process.

[0052] See also Figure 1 The main condensate pipe 400 is equipped with a regulating valve 401 and a second check valve 402. The regulating valve 401 is connected to the condensate drain device 200, and the second check valve 402 is connected to the heat exchanger 301.

[0053] It should be noted that in this embodiment, the external pipeline network supplies steam from top to bottom to the autoclave steam distribution cylinder 102. The autoclave steam distribution cylinder 102 distributes the steam to each autoclave 101. Each autoclave 101 then supplies waste steam to the autoclave steam return distribution cylinder 103 for steam return. The waste steam is used to preheat and pressurize the autoclave 101 that is about to start production, saving a large amount of fresh steam from the external pipeline network.

[0054] In this embodiment, as Figure 3As shown, the drying valve assembly 106 includes a bellows stop valve 1060, a steam-water separator 1061, and a steam trap 1062. Bellows stop valves 1060 are provided on both sides of the steam-water separator 1061, and bellows stop valves 1060 are provided on both sides of the steam trap 1062. The steam trap 1062 is connected to the steam-water separator 1061 through the bellows stop valves 1060.

[0055] like Figure 3 As shown, in one implementation of this embodiment, two bypasses are also provided, and each bypass is equipped with a bellows shut-off valve 1060. When the steam-water separator 1061 malfunctions, the bellows shut-off valves 1060 on both sides of the steam-water separator 1061 can be closed, and the bellows shut-off valve 1060 on the bypass connected in parallel with the pipeline where the steam-water separator 1061 is located can be opened, thereby completing the maintenance of the steam-water separator 1061 without affecting production. When the drain valve 1062 malfunctions, the bellows shut-off valves 1060 on both sides of the drain valve 1062 can be closed, and the bellows shut-off valve 1060 on the bypass connected in parallel with the pipeline where the drain valve 1062 is located can be opened, thereby completing the maintenance of the drain valve 1062 without affecting production.

[0056] like Figure 3 As shown, when steam passes through the branch pipe where the steam-water separator 1061 is located, the steam-water separator 1061 separates the steam and water. The steam passes through the bellows shut-off valve 1060 on one side of the steam-water separator 1061 and enters the autoclave 101. The water enters the steam trap 1062 through the condensate pipe network from the pipe below the steam-water separator 1061 and is drained. When the steam-water separator 1061 malfunctions, the steam passes through the bypass pipe connected in parallel with the branch pipe where the steam-water separator 1061 is located and is delivered to the autoclave 101.

[0057] See Figure 2The condensate drain device 200 includes a first ball valve 201, a first switching valve 202, a filter 203, a second ball valve 204, a third ball valve 205, a low-temperature drain valve 206, a high-temperature drain valve 207, a first check valve 208, a check valve 209, a fourth ball valve 210, a second switching valve 211, and a fifth ball valve 212. The autoclave 101 is connected to the first switching valve 202 via the first ball valve 201. The first switching valve 202 is connected to the filter 203. The filter 203 is connected to the second ball valve 204. The filter 203 is connected to the [unclear - possibly a specific valve or component] via the third ball valve 205. The low-temperature steam trap 206 is described above. The filter 203 is also connected to the high-temperature steam trap 207. The high-temperature steam trap 207 is connected to the first check valve 208 and the inspection valve 209. The first check valve 208 is connected to the fourth ball valve 210. The fourth ball valve 210 is connected to the main condensate pipe 400. The first switch valve 202 is connected to the control cabinet 500. The autoclave 101 is connected to the second switch valve 211 through the fifth ball valve 212. The second switch valve 211 is connected to the autoclave depressurization exhaust steam main pipe. The second switch valve 211 is also connected to the control cabinet 500.

[0058] See also Figure 2 In one implementation of this embodiment, the filter 203 is a Y-type filter. One end of the Y-type filter is connected to the first switching valve 202, the other end of the Y-type filter is connected to the second ball valve 204, and the third end of the Y-type filter is connected to the third ball valve 205 and the high-temperature steam trap 207.

[0059] By adopting the above technical solution, the sewage discharge performance is enhanced by the filter 203, preventing the steam trap from being blocked by sewage. The inspection valve 209 can check the condition of the steam trap, and when the steam trap malfunctions, it can be detected and replaced in time, resulting in better drainage performance. The check valve can prevent interference from other autoclaves 101. It should be noted that in this embodiment, the steam trap checked by the inspection valve 209 is the high-temperature steam trap 207, and the check valve is the first check valve 208.

[0060] like Figure 4 As shown, the heat energy utilization device also includes a third check valve 302, a gate valve 303, a sixth ball valve 304, and a thermometer 305. The end of the heat exchanger 301 away from the main condensate pipe 400 is connected in sequence to the third check valve 302 and the gate valve 303. The gate valve 303 is connected to the thermometer 305 through the sixth ball valve 304. The gate valve 303 is also connected to the boiler.

[0061] like Figure 1 or Figure 4As shown by the arrow, the condensate drain device 200 transports condensate to the heat exchanger 301 through the main condensate pipe 400. After passing through the heat exchanger 301, the soft water from the soft water station fully utilizes its heat energy and is then transported to the boiler room. The thermometer 305 is used to measure the temperature of the heated soft water. Finally, the condensate with all its heat energy utilized is transported to the pulping workshop. This process achieves complete utilization of heat energy. Through the cooperation of the automatic steam distribution and reversing device, the condensate drain device 200, and the heat energy utilization device, more than 15% of the fresh steam from the external pipeline network can be saved.

[0062] The embodiments provided in this application are merely optimal examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. Any other implementation methods derived by those skilled in the art based on the scheme of this application without inventive effort are within the scope of protection of this application.

Claims

1. A steam energy saving system for an autoclave, characterized by, The steam energy-saving system of the autoclave comprises: The automatic steam distribution and discharge device comprises an autoclave, an autoclave steam inlet distribution cylinder and an autoclave steam discharge distribution cylinder, and adjusting valves are arranged on the autoclave steam inlet distribution cylinder and the autoclave steam discharge distribution cylinder, and the autoclave is connected to the autoclave steam inlet distribution cylinder and the autoclave steam discharge distribution cylinder through the adjusting valves; The automatic steam distribution and discharge device further comprises an air exhaust valve group arranged on the autoclave and used for exhausting air in the autoclave; The automatic steam distribution and discharge device further comprises a drying valve group arranged on a sealed steam inlet pipeline of the autoclave and used for exhausting moisture in the sealed steam inlet pipeline of the autoclave; The drying valve group comprises corrugated pipe stop valves, a steam-water separator and a drain valve, corrugated pipe stop valves are arranged on both sides of the steam-water separator, corrugated pipe stop valves are arranged on both sides of the drain valve, and the drain valve is connected to the steam-water separator through the corrugated pipe stop valves; The heat energy utilization device comprises a heat exchanger, one end of the heat exchanger is connected to a total condensate pipeline, and the other end of the heat exchanger is connected to a soft water station; The condensate drain device is arranged at the bottom of the autoclave and connected to the heat exchanger through the total condensate pipeline; A control cabinet is electrically connected to the automatic steam distribution and discharge device and the condensate drain device; The condensate drain device comprises a first ball valve, a first on-off valve, a filter, a second ball valve, a third ball valve, a low-temperature drain valve, a high-temperature drain valve, a first check valve, a check valve, a fourth ball valve, a second on-off valve and a fifth ball valve, the autoclave is connected to the first on-off valve through the first ball valve, the first on-off valve is connected to the filter, the filter is connected to the second ball valve, the filter is connected to the low-temperature drain valve through the third ball valve, the filter is also connected to the high-temperature drain valve, the high-temperature drain valve is connected to the first check valve and the check valve, the first check valve is connected to the fourth ball valve, the fourth ball valve is connected to the total condensate pipeline, the first on-off valve is connected to the control cabinet, the autoclave is connected to the second on-off valve through the fifth ball valve, the second on-off valve is connected to an autoclave pressure relief and exhaust steam pipeline, and the second on-off valve is also connected to the control cabinet.

2. The steam energy saving system for an autoclave according to claim 1, wherein The filter is a Y-shaped filter, one end of the Y-shaped filter is connected to the first on-off valve, the other end of the Y-shaped filter is connected to the second ball valve, and the third end of the Y-shaped filter is connected to the third ball valve and the high-temperature drain valve.

3. The steam energy saving system for an autoclave according to claim 1, wherein An adjusting valve and a second check valve are arranged on the total condensate pipeline, the adjusting valve is connected to the condensate drain device, and the second check valve is connected to the heat exchanger.

4. The steam energy saving system for an autoclave according to claim 1, wherein The heat energy utilization device further comprises a third check valve, a gate valve, a sixth ball valve and a thermometer, one end of the heat exchanger away from the total condensate pipeline is sequentially connected to the third check valve and the gate valve, the gate valve is connected to the thermometer through the sixth ball valve, and the gate valve is also connected to a boiler.

5. The steam energy saving system for an autoclave according to claim 1, wherein The control cabinet is connected to the autoclave steam inlet distribution cylinder and the autoclave steam discharge distribution cylinder through adjusting valves.

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