A steam treatment system and method for an autoclave

Abstract

The application provides a steam treatment system of an autoclave, which comprises a control device, a white smoke elimination device, a first pipeline connected between the white smoke elimination device and a drainage outlet of the autoclave, a cold water tank connected with the white smoke elimination device through a second pipeline, a water storage pool connected with the white smoke elimination device through a third pipeline, and a fourth pipeline connected between a steam outlet of the autoclave and the white smoke elimination device; a stop valve and a temperature acquisition device are installed on the first pipeline; a stop valve, a flow meter, a temperature acquisition device and a pressure acquisition device are installed on the second pipeline; and a stop valve, an adjusting valve, a temperature acquisition device and a pressure acquisition device are installed on the fourth pipeline. The application further provides an autoclave steam treatment method based on the system, in which waste water, waste steam and waste heat generated in autoclave steam curing are recycled through twice heat exchange, fuel consumption is saved, and the purpose of energy saving and emission reduction is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam treatment, in particular to a steam autoclave steam treatment system and method. BACKGROUND

[0002] The steam autoclave, also known as a steam curing autoclave or a pressure steam autoclave, is a large pressure vessel with a large volume and heavy weight. The steam autoclave is used for steam curing of concrete blocks or slabs, and the main process is to send the concrete blocks or slabs into the steam autoclave for a certain period of time for steam curing, so that the required strength can be achieved.

[0003] During the steam curing process, steam will be liquefied by cold to form a large amount of condensate water, which must be discharged from the steam autoclave in time to maintain the high temperature in the steam autoclave. On the other hand, after the steam curing is completed, the steam in the steam autoclave needs to be exhausted before the door of the steam autoclave is opened to ensure safety. Currently, the remaining heat of the steam is utilized by factories, that is, when there is a large amount of remaining steam in the steam autoclave, it is transported into other steam autoclaves. As the remaining steam in the steam autoclave is output, the steam pressure in the steam autoclave continuously decreases. When it decreases to a certain extent, the remaining steam is directly discharged into the atmosphere through a pipeline, which easily produces a large amount of white smoke, noise and odor, causing great impact on surrounding enterprises and residents, and reducing the recycling rate of waste steam from the steam autoclave. SUMMARY

[0004] The present application provides a steam autoclave steam treatment system and method for efficiently treating waste water, waste gas and waste heat generated by the steam autoclave.

[0005] The technical solution adopted by the present application is as follows:

[0006] A steam autoclave steam treatment system, the system comprising a control device, a white smoke elimination device, a first pipeline connected between the white smoke elimination device and a drain outlet of the steam autoclave, a cold water tank connected to the white smoke elimination device through a second pipeline, a water storage tank connected to the white smoke elimination device through a third pipeline, and a fourth pipeline connected between a steam outlet of the steam autoclave and the white smoke elimination device;

[0007] A stop valve and a temperature acquisition device are installed on the first pipeline; a stop valve, a flow meter, a temperature acquisition device and a pressure acquisition device are installed on the second pipeline; a stop valve, a regulating valve, a temperature acquisition device and a pressure acquisition device are installed on the fourth pipeline;

[0008] The temperature acquisition device, the flow meter, the temperature acquisition device, the pressure acquisition device, the regulating valve, the temperature acquisition device and the pressure acquisition device are respectively communicatively connected to the control device.

[0009] Furthermore, the system further includes a fifth pipe and a hot water tank, the fifth pipe being connected between the white smoke elimination device and the water inlet of the hot water tank, the shut-off valve and the temperature collection device being installed on the fifth pipe; the temperature collection device being communicatively connected to the control device;

[0010] The water outlet of the hot water tank and the water inlet of the cold water tank are connected via a sixth pipe, and the stop valve is installed on the sixth pipe.

[0011] Furthermore, the system further comprises an exhaust sub-cylinder, the exhaust port of the autoclave is connected to the steam inlet of the exhaust sub-cylinder, and the exhaust sub-cylinder has a plurality of exhaust ports.

[0012] Furthermore, one end of the first pipe is connected to the drain outlet of the autoclave, and the other end is connected to the first water inlet of the white smoke elimination device; one end of the second pipe is connected to the water outlet of the cold water tank, and the other end is connected to the second water inlet of the white smoke elimination device; one end of the third pipe is connected to the first water outlet of the white smoke elimination device, and the other end is connected to the water inlet of the water reservoir; one end of the fourth pipe is connected to the exhaust port of the exhaust cylinder, and the other end is connected to the steam inlet of the white smoke elimination device; one end of the fifth pipe is connected to the second water outlet of the white smoke elimination device, and the other end is connected to the water inlet of the hot water tank.

[0013] Furthermore, the water outlet of the hot water tank is connected to the boiler through a pipe, and a stop valve is installed on the pipe.

[0014] Furthermore, the white smoke elimination device is a steam-water heat exchanger.

[0015] The present application also provides an autoclave steam treatment method, the method comprising:

[0016] The control device collects the steam pressure value in the autoclave;

[0017] When the steam pressure in the autoclave is greater than the pressure threshold, the stop valve on the first pipeline and the stop valve on the second pipeline are opened, so that the hot condensate in the autoclave and the cooling water in the cold water tank undergo a heat exchange in the white smoke elimination device until the water temperature in the white smoke elimination device reaches 60-70°C. The water after the heat exchange is then flowed into the water reservoir through the third pipeline;

[0018] When the steam pressure in the autoclave is less than or equal to the pressure threshold, continue to open the stop valve on the fourth pipeline, so that the hot steam in the autoclave and the cooling water in the cold water tank undergo secondary heat exchange in the white smoke elimination device until the water temperature in the white smoke elimination device is 60-70℃, and then the water after the secondary heat exchange flows into the water reservoir through the third pipeline.

[0019] Furthermore, the method further comprises:

[0020] The control device collects the steam pressure value in the autoclave;

[0021] When the steam pressure in the autoclave is greater than the pressure threshold, the stop valve on the first pipeline, the stop valve on the second pipeline, and the stop valve on the fifth pipeline are opened, so that the condensate in the autoclave and the cooling water in the cold water tank undergo a heat exchange in the white smoke elimination device until the water temperature in the white smoke elimination device reaches 60-70°C. The water after the heat exchange is then flowed into the hot water tank through the fifth pipeline;

[0022] When the steam pressure in the autoclave is less than or equal to the pressure threshold, continue to open the stop valve on the fourth pipeline, so that the hot steam in the autoclave and the cooling water in the cold water tank undergo secondary heat exchange in the white smoke elimination device until the water temperature in the white smoke elimination device reaches 60-70°C, and then the water after the secondary heat exchange flows to the hot water tank through the fifth pipeline.

[0023] Furthermore, when the water in the hot water tank cools to room temperature, the control device controls the water in the hot water tank to flow into the cold water tank, or when the water temperature in the hot water tank is 60-70° C., the control device controls the water in the hot water tank to flow into the boiler.

[0024] The beneficial effects of adopting the technical solution of this application are as follows:

[0025] The present application recycles the wastewater, waste steam and waste heat generated by the autoclave curing through two heat exchanges, thereby saving fuel consumption and achieving the purpose of energy conservation and emission reduction; and there is no need to directly discharge the remaining waste steam in the autoclave into the atmosphere, thus solving the environmental problems such as white smoke, noise and odor caused by direct discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 This is a structural schematic diagram of an autoclave steam treatment system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to enable people in this technical field to better understand the technical solutions in the embodiments of the present application, and to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0029] See also Figure 1A structure diagram of a steam treatment system of an autoclave provided by the embodiment of the application, arrows in the diagram are used to indicate the flow direction of fluid in each pipeline.

[0030] The steam treatment system of the autoclave 3 provided by the application, the system comprises a control device 1, a white smoke elimination device 2, a first pipeline 4 connected between the white smoke elimination device 2 and a water outlet of the autoclave 3, a cold water tank 6 connected with the white smoke elimination device 2 through a second pipeline 5, a water storage pool 8 connected with the white smoke elimination device 2 through a third pipeline 7, and a fourth pipeline 9 connected between a steam outlet of the autoclave 3 and the white smoke elimination device 2.

[0031] The first pipeline 4 is provided with a stop valve 401 and a temperature acquisition device 402; the second pipeline 5 is provided with a stop valve 501, a flow meter 502, a temperature acquisition device 503 and a pressure acquisition device 504; and the fourth pipeline 9 is provided with a stop valve 901, a regulating valve 902, a temperature acquisition device 903 and a pressure acquisition device 904. A stop valve can also be installed on the third pipeline 7.

[0032] The temperature acquisition device 402, the flow meter 502, the temperature acquisition device 503, the pressure acquisition device 504, the temperature acquisition device 903 and the pressure acquisition device 904 are respectively in communication connection with the control device 1, so as to transmit the data (such as water flow, water temperature, pressure in the pipeline, etc.) collected by each device to the control device 1, and the control device 1 adjusts the opening degree of the regulating valve 902 in response to the data.

[0033] In the embodiment, in order to further utilize the heat-exchanged water, the system further comprises a fifth pipeline 10 and a hot water tank 11, the fifth pipeline 10 is connected between the white smoke elimination device 2 and a water inlet of the hot water tank 11, and the fifth pipeline 10 is provided with a stop valve and a temperature acquisition device; the temperature acquisition device is in communication connection with the control device 1; a water outlet of the hot water tank 11 is connected with a water inlet of the cold water tank 6 through a sixth pipeline 12, and the sixth pipeline 12 is provided with a stop valve.

[0034] In the embodiment, the system of the application further comprises an exhaust steam distribution cylinder 13, the exhaust steam distribution cylinder 13 is connected with the autoclave 3, specifically, a steam outlet of the autoclave 3 is communicated with a steam inlet of the exhaust steam distribution cylinder 13, and the exhaust steam distribution cylinder 13 has a plurality of steam outlets.

[0035] In this embodiment, one end of the first pipe 4 is connected to the drain outlet of the autoclave 3, and the other end is connected to the first water inlet of the white smoke elimination device 2; one end of the second pipe 5 is connected to the water outlet of the cold water tank 6, and the other end is connected to the second water inlet of the white smoke elimination device 2; one end of the third pipe 7 is connected to the first water outlet of the white smoke elimination device 2, and the other end is connected to the water inlet of the reservoir 8; one end of the fourth pipe 9 is connected to the exhaust port of the exhaust cylinder 13, and the other end is connected to the steam inlet of the white smoke elimination device 2; one end of the fifth pipe 10 is connected to the second water outlet of the white smoke elimination device 2, and the other end is connected to the water inlet of the hot water tank 11. The water outlet of the hot water tank 11 is connected to the boiler through a pipe, and a stop valve is installed on the pipe. The white smoke elimination device 2 is a steam-water heat exchanger that can exchange heat from steam or condensate into cooling water, thereby increasing the temperature of the cooling water and achieving the purpose of heat exchange.

[0036] Based on the steam treatment system of the autoclave 3 provided in the above embodiment, this embodiment provides a steam treatment method of the autoclave 3, comprising the following steps:

[0037] The control device 1 collects the steam pressure value in the autoclave 3, that is, collects the data of the pressure collection device 904.

[0038] When the steam pressure in the autoclave 3 is greater than the pressure threshold, the stop valve 401 on the first pipe 4 and the stop valve 501 on the second pipe 5 are opened (when a stop valve is installed on the third pipe 7, the stop valve on the third pipe 7 must also be opened to ensure the unobstructed flow of the third pipe 7), so that the hot condensate in the autoclave 3 and the cooling water in the cold water tank 6 undergo a heat exchange in the white smoke elimination device 2 until the water temperature in the white smoke elimination device 2 reaches 60-70℃, and the water after the heat exchange flows into the water reservoir 8 through the third pipe 7.

[0039] When the steam pressure in the autoclave 3 is less than or equal to the pressure threshold, the stop valve 901 on the fourth pipe 9 continues to be opened, allowing the hot steam in the autoclave 3 and the cooling water in the cold water tank 6 to undergo secondary heat exchange in the white smoke elimination device 2 until the water temperature in the white smoke elimination device 2 reaches 60-70°C. The water after the secondary heat exchange is then flowed into the water reservoir 8 through the third pipe 7. The water in the water reservoir 8 can be reused. The pressure threshold of this embodiment is determined according to actual production needs, and the value range of the pressure threshold is 0.2-0.3MPa, preferably 0.2MPa.

[0040] In order to improve the utilization rate of wastewater, waste gas and waste heat, this embodiment provides another steam treatment method of the autoclave 3, comprising the following steps:

[0041] The control device 1 collects the steam pressure value in the autoclave 3; that is, collects the data of the pressure collection device 904.

[0042] When the steam pressure in the autoclave 3 is greater than the pressure threshold, the stop valve 401 on the first pipe 4, the stop valve 501 on the second pipe 5 and the stop valve 1001 on the fifth pipe 10 are opened, so that the condensed water in the autoclave 3 and the cooling water in the cold water tank 6 undergo a heat exchange in the white smoke elimination device 2 until the water temperature in the white smoke elimination device 2 reaches 60-70°C, and the water after the heat exchange flows into the hot water tank 11 through the fifth pipe 10; the pressure threshold of this embodiment is determined according to actual production needs, and the value range of the pressure threshold is 0.2-0.3MPa, preferably 0.2MPa.

[0043] When the steam pressure in the autoclave 3 is less than or equal to the pressure threshold, the stop valve 901 on the fourth pipe 9 continues to be opened, so that the hot steam in the autoclave 3 and the cooling water in the cold water tank 6 undergo secondary heat exchange in the white smoke elimination device 2 until the water temperature in the white smoke elimination device 2 reaches 60-70°C. The water after the secondary heat exchange flows to the hot water tank 11 through the fifth pipe 10.

[0044] When the water in the hot water tank 11 cools to room temperature, the control device 1 controls the water in the hot water tank 11 to flow into the cold water tank 6 through the sixth pipe 12, continuously replenishing the cold water tank 6 with water, so that the cooling water used to be input into the white smoke elimination device 2 for heat exchange is always at a low temperature, so that the cold and heat of the entire treatment system reach a balance. Alternatively, when the water temperature in the hot water tank 11 is 60-70°C, the control device 1 controls the water in the hot water tank 11 to flow into the boiler, thereby increasing the temperature of the boiler water and achieving energy saving.

[0045] The method of the present application recycles the waste water, waste steam and waste heat generated by the autoclave autoclave curing through two heat exchanges, thereby saving fuel consumption and achieving the purpose of energy conservation and emission reduction; and there is no need to directly discharge the remaining waste steam in the autoclave into the atmosphere, thereby solving the environmental problems such as white smoke, noise and odor caused by direct discharge.

[0046] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without expending creative work shall fall within the scope of protection of this application.

Claims

1. An autoclave steam treatment system, characterized in that: The system includes a control device, a white smoke elimination device, a first pipe connected between the white smoke elimination device and the drain port of the autoclave, a cold water tank connected to the white smoke elimination device via a second pipe, a water reservoir connected to the white smoke elimination device via a third pipe, and a fourth pipe connected between the exhaust port of the autoclave and the white smoke elimination device; The first pipeline is equipped with a shut-off valve and a temperature collection device; the second pipeline is equipped with a shut-off valve, a flow meter, a temperature collection device and a pressure collection device; the fourth pipeline is equipped with a shut-off valve, a regulating valve, a temperature collection device and a pressure collection device; The temperature acquisition device, the flow meter, the temperature acquisition device, the pressure acquisition device, the regulating valve, the temperature acquisition device and the pressure acquisition device are respectively connected to the control device for communication; The system further includes a fifth pipe and a hot water tank, wherein the fifth pipe is connected between the white smoke elimination device and the water inlet of the hot water tank, and the shut-off valve and the temperature collection device are installed on the fifth pipe; the temperature collection device is in communication with the control device; The water outlet of the hot water tank is connected to the water inlet of the cold water tank via a sixth pipe, and the stop valve is installed on the sixth pipe; The white smoke elimination device is a steam-water heat exchanger.

2. The autoclave steam treatment system according to claim 1, characterized in that: The system further comprises an exhaust sub-cylinder, the exhaust port of the autoclave is connected to the steam inlet of the exhaust sub-cylinder, and the exhaust sub-cylinder has a plurality of exhaust ports.

3. The autoclave steam treatment system according to claim 2, characterized in that: One end of the first pipe is connected to the drain outlet of the autoclave, and the other end is connected to the first water inlet of the white smoke elimination device; one end of the second pipe is connected to the water outlet of the cold water tank, and the other end is connected to the second water inlet of the white smoke elimination device; one end of the third pipe is connected to the first water outlet of the white smoke elimination device, and the other end is connected to the water inlet of the water reservoir; One end of the fourth pipe is connected to the exhaust port of the exhaust cylinder, and the other end is connected to the steam inlet of the white smoke elimination device; one end of the fifth pipe is connected to the second water outlet of the white smoke elimination device, and the other end is connected to the water inlet of the hot water tank.

4. The autoclave steam treatment system according to claim 3, characterized in that: The water outlet of the hot water tank is connected to the boiler through a pipeline, and a stop valve is installed on the pipeline.

5. An autoclave steam treatment method, applied to the autoclave steam treatment system according to claim 4, characterized in that: The method comprises: The control device collects the steam pressure value in the autoclave; When the steam pressure in the autoclave is greater than the pressure threshold, the stop valve on the first pipeline and the stop valve on the second pipeline are opened, so that the hot condensate in the autoclave and the cooling water in the cold water tank undergo a heat exchange in the white smoke elimination device until the water temperature in the white smoke elimination device reaches 60-70°C. The water after the heat exchange is then flowed into the water reservoir through the third pipeline; When the steam pressure in the autoclave is less than or equal to the pressure threshold, continue to open the stop valve on the fourth pipeline, so that the hot steam in the autoclave and the cooling water in the cold water tank undergo secondary heat exchange in the white smoke elimination device until the water temperature in the white smoke elimination device reaches 60-70°C. Then, the water after the secondary heat exchange flows into the water reservoir through the third pipeline; or: The control device collects the steam pressure value in the autoclave; When the steam pressure in the autoclave is greater than the pressure threshold, the stop valve on the first pipeline, the stop valve on the second pipeline, and the stop valve on the fifth pipeline are opened, so that the condensate in the autoclave and the cooling water in the cold water tank undergo a heat exchange in the white smoke elimination device until the water temperature in the white smoke elimination device reaches 60-70°C. The water after the heat exchange is then flowed into the hot water tank through the fifth pipeline; When the steam pressure in the autoclave is less than or equal to the pressure threshold, continue to open the stop valve on the fourth pipeline, so that the hot steam in the autoclave and the cooling water in the cold water tank undergo secondary heat exchange in the white smoke elimination device until the water temperature in the white smoke elimination device reaches 60-70°C, and then the water after the secondary heat exchange flows to the hot water tank through the fifth pipeline.

6. The autoclave steam treatment method according to claim 5, characterized in that: When the water in the hot water tank cools to room temperature, the control device controls the water in the hot water tank to flow into the cold water tank, or when the water temperature in the hot water tank is 60-70°C, the control device controls the water in the hot water tank to flow into the boiler.

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