Steam desuperheating apparatus and control method for gypsum board production line

Abstract

Disclosed are a steam desuperheating apparatus and control method for a gypsum board production line. The apparatus comprises a steam conveying pipe, an atomization assembly (2), a water tank (3), a desuperheating water drive assembly (4), an adjustment valve (6), a temperature monitoring assembly and a control module, wherein the steam conveying pipe is used for conveying high-temperature steam, and the atomization assembly is arranged at a front end of the steam conveying pipe; and the water tank (3) is used for storing desuperheating water. Atomized desuperheating water is input into a steam conveying pipe, and the desuperheating water is used to absorb the heat of superheated steam, so as to achieve the purpose of reducing the temperature of the superheated steam; moreover, the input amount of desuperheating water can be automatically adjusted on the basis of the temperature difference between steam at a steam inlet and steam at a steam outlet of the steam conveying pipe, such that the temperature of steam which is output by the steam conveying pipe remains at a stable value.

Description

Gypsum board production line steam temperature reducing device and control method TECHNICAL FIELD

[0001] The present application relates to the technical field of steam delivery, in particular to a gypsum board production line steam temperature reducing device and control method. BACKGROUND

[0002] In the gypsum board production line, gypsum calcination and subsequent gypsum board drying require a large amount of flowable heat. The existing gypsum board production line uses high-temperature steam for the above processes, which has high delivery efficiency.

[0003] The high-temperature steam is usually obtained from a power plant steam or a factory steam produced by a boiler. When the power plant steam or the factory steam produced by the boiler is discharged, the temperature of the steam is not stable. If the steam is used for gypsum board production and processing, the overheated steam will not only damage the gypsum board production equipment, but also is not conducive to gypsum calcination and gypsum board drying, resulting in a high rate of defective gypsum board.

[0004] Therefore, the present application provides a gypsum board production line steam temperature reducing device and control method to reduce the temperature of high-temperature steam to the actual temperature required for production and maintain the temperature of the reduced steam at a stable value, thereby providing a stable heat source for gypsum calcination and board drying.

[0005] SUMMARY

[0006] The present application aims to provide a gypsum board production line steam temperature reducing device and control method to solve the technical problem that the temperature of the steam is not stable when using steam for gypsum production, and the overheated steam will not only damage the gypsum board production equipment, but also is not conducive to gypsum production.

[0007] To solve the above technical problems, the present application specifically provides the following technical solutions:

[0008] A gypsum board production line steam temperature reducing device includes a steam delivery pipeline, an atomization assembly, a water tank, a temperature-reducing water driving assembly, a regulating valve, a temperature monitoring assembly, and a control module.

[0009] The steam delivery pipeline is used to deliver high-temperature steam, and the atomization assembly is arranged at the front end of the steam delivery pipeline.

[0010] The water tank is used to store temperature-reducing water. A temperature-reducing water driving assembly and a regulating valve are sequentially arranged between the water tank and the atomization assembly. The temperature monitoring assembly, the temperature-reducing water driving assembly, and the regulating valve are in communication connection with the control module.

[0011] The desuperheating water driving assembly is used to deliver the desuperheating water in the water tank to the atomizing assembly, and the atomizing assembly atomizes and outputs the desuperheating water into the steam delivery pipeline;

[0012] The temperature monitoring assembly is used to monitor the temperature of the input steam and the exhaust steam of the steam delivery pipeline and feed back a signal to the control module, and the control module identifies the signal and sends an instruction to the regulating valve to adjust the opening degree of the regulating valve so as to change the flow of the desuperheating water input into the atomizing assembly.

[0013] As a preferred scheme of the present application, the atomizing assembly comprises an atomizing nozzle arranged in the steam delivery pipeline, and the atomizing nozzle comprises a rotary atomizing nozzle.

[0014] A steam mixing assembly is arranged on the inner wall of the steam delivery pipeline.

[0015] As a preferred scheme of the present application, the steam mixing assembly comprises a helical blade arranged on the inner wall of the steam delivery pipeline, and the helical blade is arranged along the length direction of the steam delivery pipeline so as to make the steam rotate and deliver along the length direction in the steam delivery pipeline.

[0016] As a preferred scheme of the present application, a backwater pipeline is further arranged between the water inlet end of the regulating valve and the water tank, a throttling valve is arranged in the backwater pipeline, and a pressure monitor for monitoring the pressure of the water inlet end and the water outlet end of the regulating valve is further arranged on the regulating valve.

[0017] The pressure monitor and the throttling valve are both in communication connection with the control module.

[0018] As a preferred scheme of the present application, the desuperheating water driving assembly comprises a first power assembly and a second power assembly which are arranged in parallel and have the same structure.

[0019] The first power assembly comprises a stop valve, a check valve, a water pump and a filter which are arranged in sequence between the regulating valve and the water tank, and the water pump is provided with at least two.

[0020] As a preferred scheme of the present application, the temperature monitoring assembly comprises two temperature sensors arranged at the steam inlet end and the steam outlet end of the steam delivery pipeline, and the two temperature sensors respectively monitor the temperature of the steam at the steam inlet end and the steam outlet end of the steam delivery pipeline and feed back to the control module, and the control module calculates the temperature difference of the steam at the steam inlet end and the steam outlet end of the steam delivery pipeline.

[0021] As a preferred scheme of the present application, a liquid level meter is arranged in the water tank, and an electric ball valve is arranged on the water inlet pipeline of the water tank.

[0022] A gypsum board production line steam temperature reduction control method, comprising the following steps:

[0023] S100, high-temperature steam is transported through a steam delivery pipeline;

[0024] S200, the desuperheating water in the water tank is transported to an atomization assembly through a desuperheating water driving assembly, the desuperheating water is atomized and sprayed in the steam delivery pipeline, and the atomized desuperheating water is mixed with the high-temperature steam, the desuperheating water absorbs the heat of the superheated steam and vaporizes to reduce the temperature of the superheated steam;

[0025] S300, a temperature monitoring assembly monitors the temperature difference of the steam at the steam inlet end and the steam outlet end of the steam delivery pipeline in real time, and transmits the monitored signal to a control module, and the control module adjusts the valve according to preset data instructions to change the opening degree of the valve

[0026] As a preferred scheme of the present application, in step S200, the first power assembly and the second power assembly in the desuperheating water driving assembly are used alternately.

[0027] As a preferred scheme of the present application, in step S200, a pressure monitor monitors the pressure of the desuperheating water at the front end and the rear end of the valve in real time, and the pressure monitor transmits the monitored data to the control module in real time, and the control module adjusts the opening degree of the throttle valve in the backwater pipeline according to preset data to backwater to the water tank to avoid the water pressure at the front end of the valve exceeding the preset threshold.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] In the present application, the atomized desuperheating water is input into the steam delivery pipeline, the desuperheating water absorbs the heat of the superheated steam to reduce the temperature of the superheated steam, and the input amount of the desuperheating water can be automatically adjusted according to the temperature difference of the steam at the steam inlet end and the steam outlet end of the steam delivery pipeline to keep the steam temperature output by the steam delivery pipeline at a stable value. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creating any creative labor.

[0031] Fig. 1 is a structural schematic view of a gypsum board production line steam temperature reduction device and control method provided by the embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the structure of the steam delivery pipeline in the gypsum board production line steam temperature reducing device according to the embodiment of the present application;

[0033] The reference numerals in the figures represent the following respectively:

[0034] 1 Steam delivery pipeline, 101 helical blade;

[0035] 2 Atomization assembly, 3 water tank;

[0036] 4 Temperature reducing water driving assembly, 401 first power assembly, 402 second power assembly;

[0037] 5 Water return pipeline, 501 throttle valve;

[0038] 6 Regulating valve;

[0039] 7 Pressure monitor, 701 rear-end pressure transmitter, 702 front-end pressure transmitter;

[0040] 8 Water replenishing assembly, 801 electric ball valve. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0042] In order to solve the technical problem that the steam temperature is not stable when steam is used to produce gypsum, and that overheated steam not only damages the gypsum board production equipment, but also is not conducive to the production of gypsum board, as shown in Figure 1, the present application provides a gypsum board production line steam temperature reducing device, comprising:

[0043] Steam delivery pipeline 1, atomization assembly 2, water tank 3, temperature reducing water driving assembly 4, regulating valve 6, temperature monitoring assembly and control module.

[0044] The steam delivery pipeline 1 is used to deliver high-temperature steam, and the atomization assembly 2 is arranged at the front end of the steam delivery pipeline 1.

[0045] The water tank 3 is used to store temperature reducing water, and the temperature reducing water driving assembly 4 and the regulating valve 6 are arranged in sequence between the water tank 3 and the atomization assembly 2. The temperature monitoring assembly, the temperature reducing water driving assembly 4 and the regulating valve 6 are all in communication connection with the control module.

[0046] The temperature reducing water driving assembly 4 is used to deliver the temperature reducing water in the water tank 3 to the atomization assembly 2, and the atomization assembly 2 atomizes and outputs the temperature reducing water into the steam delivery pipeline 1.

[0047] The temperature monitoring assembly is used to monitor the temperature difference of the steam input and output of the steam conveying pipeline 1 and feed back the signal to the control module, the control module identifies the signal and sends instructions to the regulating valve 6 to adjust the opening of the regulating valve 6 to change the flow of the desuperheating water input into the atomizing assembly 2.

[0048] When the superheated steam is conveyed through the steam conveying pipeline 1, the desuperheating water in the water tank 3 is continuously conveyed to the atomizing assembly 2 by the desuperheating water driving assembly 4, the atomizing assembly 2 atomizes and sprays the desuperheating water in the steam conveying pipeline 1, the atomized desuperheating water is in the form of tiny droplets and is wrapped and flows with the high-speed flowing superheated steam, the desuperheating water absorbs the heat of the superheated steam and evaporates rapidly, and is mixed with the steam in the steam mixing pipeline to achieve the purpose of reducing the temperature of the superheated steam.

[0049] At the same time, the temperature monitoring assembly monitors the temperature of the steam at the steam input end and the steam output end of the steam conveying pipeline 1 in real time, since the purpose of the device is to keep the steam temperature at the steam output end of the steam conveying pipeline 1 stable, the steam temperature at the steam output end of the steam conveying pipeline 1 is set to a constant value.

[0050] First, the control system is preset in the control module, when the temperature difference of the steam at the steam input end and the steam output end of the steam conveying pipeline 1 is within the preset range, the control module keeps the opening of the regulating valve 6 unchanged, when the temperature difference is greater than the preset threshold value, that is, the steam temperature at the steam input end of the steam conveying pipeline 1 is too high, the control module increases the opening of the regulating valve 6 to increase the amount of desuperheating water discharged into the steam conveying pipeline 1 to enhance the cooling effect of the superheated steam in the steam conveying pipeline 1, when the temperature difference is less than the preset threshold value, that is, the steam temperature at the steam input end of the steam conveying pipeline 1 is lower, the control module reduces the opening of the regulating valve 6 to reduce the amount of desuperheating water discharged into the steam conveying pipeline 1 to reduce the cooling effect of the superheated steam in the steam conveying pipeline 1, so that the temperature of the desuperheated steam remains at a stable value.

[0051] In order to realize the atomization effect of the desuperheating water in the steam conveying pipeline 1, in this embodiment, the atomizing assembly 2 includes an atomizing nozzle arranged in the steam conveying pipeline 1, the desuperheating water is atomized and sprayed in the steam conveying pipeline 1 through the atomizing nozzle, further, the atomizing nozzle includes a rotary atomizing nozzle, when the rotary atomizing nozzle is used, the atomizing nozzle is automatically driven to rotate when the desuperheating water flows, so that the atomized desuperheating water is sprayed in a larger range in the steam conveying pipeline 1.

[0052] The steam mixing assembly is arranged on the inner wall of the steam conveying pipeline 1 to improve the mixing degree of the atomized desuperheating water and the superheated steam.

[0053] In the embodiment, the steam mixing assembly comprises helical blades 101 installed on the inner wall of the steam delivery pipeline 1, which are arranged along the length direction of the steam delivery pipeline 1 to make the steam rotate in the steam delivery pipeline 1 along the length direction.

[0054] Under the flow guiding effect of the helical blades 101, the steam in the steam delivery pipeline 1 is rotated to make the atomized desuperheating water and the superheated steam forcibly rotate and mix, the atomized desuperheating water is further broken, the contact area between the desuperheating water and the superheated steam is increased, and the atomized desuperheating water is vaporized by absorbing heat on the inner wall of the steam delivery pipeline 1 to accelerate the heat absorption speed of the desuperheating water on the superheated steam.

[0055] When the opening degree of the regulating valve 6 is adjusted and changed, especially when the opening degree of the regulating valve 6 is reduced, in order to avoid the excessive pressure at the water inlet end of the regulating valve, in the embodiment, a backwater pipeline 5 is further arranged between the water inlet end of the regulating valve 6 and the water tank 3, a throttling valve 501 is arranged in the backwater pipeline 5, and a pressure monitor 7 is further arranged on the regulating valve 6 to monitor the pressure at the water inlet end and the water outlet end.

[0056] The pressure monitor 7 and the throttling valve 501 are in communication connection with the control module.

[0057] When the control module adjusts the opening degree of the regulating valve 6, the control module automatically adjusts the opening degree of the throttling valve according to the total water pressure at the water inlet end of the regulating valve 6, so that the high-pressure water flow at the water inlet end of the regulating valve 6 can flow back to the water tank 3 through the backwater pipeline 5 to ensure the constant pressure at the water inlet end of the regulating valve 6.

[0058] In the embodiment, the desuperheating water driving assembly 4 comprises a first power assembly 401 and a second power assembly 402 which are arranged in parallel and have the same structure, and a single first power assembly 401 or a single second power assembly 402 can meet the driving of the desuperheating water. In use, the first power assembly 401 and the second power assembly 402 are used one by one, and when the first power assembly 401 or the second power assembly 402 is damaged, the other one can be replaced in time for use to avoid the shutdown of the device.

[0059] The first power assembly 401 comprises a stop valve, a check valve, a water pump and a filter which are arranged in sequence between the regulating valve 6 and the water tank 3, and the water pump is provided with at least two water pumps which are simultaneously turned on to increase the effective lift.

[0060] Further, if one of the water pumps in the first power assembly 401 is damaged, one of the water pumps in the second power assembly 402 can be started to continue to maintain the delivery of the desuperheating water.

[0061] The check valve is arranged in the first power assembly 401 and the second power assembly 402, so that when the opening degree of the adjusting valve 6 is reduced, the backflow of the desuperheating water in the pipeline of the first power assembly 401 and the pipeline of the second power assembly 402 is avoided.

[0062] In order to realize the real-time monitoring of the temperature of the steam at the steam inlet end and the steam outlet end of the steam conveying pipeline 1, in the embodiment, the temperature monitoring assembly includes two temperature sensors arranged at the steam inlet end and the steam outlet end of the steam conveying pipeline 1, the two temperature sensors monitor the temperature of the steam at the steam inlet end and the steam outlet end of the steam conveying pipeline 1 respectively and feed back to the control module, and the control module calculates the temperature difference of the steam at the steam inlet end and the steam outlet end of the steam conveying pipeline 1.

[0063] Since the desuperheating water in the water tank 3 is always extracted, in order to keep the desuperheating water in the water tank 3 sufficient, in the embodiment, a liquid level meter is arranged in the water tank 3, the liquid level meter is in communication connection with the control module, and an electric ball valve 801 is installed on the water inlet pipeline of the water tank 3, when the liquid level of the desuperheating water in the water tank 3 is lower than a preset threshold, the electric ball valve 801 automatically opens the water inlet pipeline, so that the automatic water replenishment is realized, and when the liquid level in the water tank 3 reaches the preset threshold, the electric ball valve 801 is automatically closed.

[0064] The monitoring personnel can know the liquid level of the desuperheating water in the water tank 3 through the control module, so as to manually or automatically replenish water, and if the liquid level in the water tank 3 is obviously lower than the preset liquid level and the water is not replenished through the electric ball valve 801, the staff can also timely find out whether the electric ball valve 801 fails.

[0065] A gypsum board production line steam desuperheating control method, comprising the following steps:

[0066] S100, conveying high-temperature steam through the steam conveying pipeline 1;

[0067] S200, conveying the desuperheating water in the water tank 3 to the atomizing assembly 2 through the desuperheating water driving assembly 4, atomizing and spraying the desuperheating water in the steam conveying pipeline 1 by the atomizing assembly 2, and mixing the atomized desuperheating water with the high-temperature steam, so that the desuperheating water absorbs the heat of the superheated steam and vaporizes to reduce the temperature of the superheated steam;

[0068] S300, the temperature monitoring assembly monitors the temperature difference of the steam at the steam inlet end and the steam outlet end of the steam conveying pipeline in real time, and transmits the monitored signal to the control module, the control module adjusts the valve 6 according to the preset data instruction to change the opening degree of the adjusting valve 6, so as to change the amount of the desuperheating water discharged into the steam conveying pipeline 1, and further change the desuperheating effect of the desuperheating water on the superheated steam.

[0069] In step S200, the first power assembly 401 and the second power assembly 402 in the desuperheating water driving assembly 4 are used alternately.

[0070] Wherein, the single first power assembly 401 or the second power assembly 402 can meet the driving of the desuperheating water, in the use process, when the first power assembly 401 or the second power assembly 402 fails, the other power assembly starts to maintain the delivery of the desuperheating water.

[0071] In step S200, the pressure monitor 7 monitors the pressure of the desuperheating water before and after the regulating valve 6 in real time, and the pressure monitor 7 transmits the monitoring data to the control module in real time, and the control module adjusts the opening of the throttle valve 501 in the backwater pipeline 5 according to the preset data, so as to backwater to the water tank 3, so as to avoid that the water pressure before the regulating valve 6 exceeds the preset threshold.

[0072] The above examples are only exemplary embodiments of the present application, and are not used to limit the present application, the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the present application.

Claims

1. A steam desuperheating device for a gypsum board production line, characterized in that, Includes steam delivery pipeline (1), atomizing component (2), water tank (3), desuperheating water drive component (4), regulating valve (6), temperature monitoring component and control module; The steam conveying pipe (1) is used to convey high-temperature steam, and the atomizing component (2) is disposed at the front end of the steam conveying pipe (1); The water tank (3) is used to store de-cooling water. A de-cooling water drive assembly (4) and a regulating valve (6) are arranged sequentially between the water tank (3) and the atomizing assembly (2). The temperature monitoring assembly, the de-cooling water drive assembly (4) and the regulating valve (6) are all connected to the control module. The desuperheating water drive assembly (4) is used to transport the desuperheating water in the water tank (3) to the atomizing assembly (2), and the atomizing assembly (2) atomizes the desuperheating water and outputs it to the steam conveying pipe (1); The temperature monitoring component is used to monitor the temperature of the steam entering and exiting the steam in the steam conveying pipeline (1) and feed the signal back to the control module. The control module recognizes the signal and sends a command to the regulating valve (6) to adjust the opening of the regulating valve (6) to change the flow rate of the desuperheating water entering the atomizing component (2).

2. The steam desuperheating device for a gypsum board production line according to claim 1, characterized in that, The atomizing component (2) includes an atomizing nozzle disposed within the steam conveying pipe (1), the atomizing nozzle including a rotary atomizing nozzle; A steam mixing assembly is provided on the inner wall of the steam conveying pipe (1).

3. The steam desuperheating device for a gypsum board production line according to claim 1, characterized in that, The steam mixing assembly includes a spiral blade (101) installed on the inner wall of the steam conveying pipe (1), the spiral blade (101) being arranged along the length of the steam conveying pipe (1) so that steam is conveyed in rotation along its length within the steam conveying pipe (1).

4. The steam desuperheating device for a gypsum board production line according to claim 1, characterized in that, A return water pipe (5) is also provided between the inlet end of the regulating valve (6) and the water tank (3). A throttle valve (501) is provided in the return water pipe (5). A pressure monitor (7) for monitoring the pressure at the inlet and outlet ends of the regulating valve (6) is also provided on the regulating valve (6). The pressure monitor (7) and the throttle valve (501) are both connected to the control module. catch.

5. The steam desuperheating device for a gypsum board production line according to claim 1, characterized in that, The desuperheating water drive assembly (4) includes a first power assembly (401) and a second power assembly (402) arranged in parallel and having the same structure; The first power assembly (401) includes a shut-off valve, a check valve, a water pump and a filter arranged sequentially between the regulating valve (6) and the water tank (3), and at least two water pumps are provided.

6. The steam desuperheating device for a gypsum board production line according to claim 1, characterized in that, The temperature monitoring component includes two temperature sensors installed at the steam inlet and steam outlet of the steam conveying pipeline (1). The two temperature sensors monitor the temperature of the steam at the steam inlet and steam outlet of the steam conveying pipeline (1) respectively and feed it back to the control module. The control module calculates the temperature difference of the steam at the steam inlet and steam outlet of the steam conveying pipeline (1).

7. The steam desuperheating device for a gypsum board production line according to claim 1, characterized in that, A level gauge is installed inside the water tank (3), and an electric ball valve (801) is installed on the water inlet pipe of the water tank (3).

8. A method for controlling steam desuperheating in a gypsum board production line, characterized in that, A steam desuperheating device for a gypsum board production line according to claims 1-7 includes the following steps: S100. High-temperature steam is transported through steam transport pipeline (1); S200, the desuperheating water in the water tank (3) is transported to the atomizing component (2) by the desuperheating water drive component (4). The atomizing component (2) atomizes and sprays the desuperheating water into the steam conveying pipe (1), and the atomized desuperheating water mixes with the high-temperature steam. The desuperheating water absorbs the heat of the superheated steam and vaporizes to reduce the temperature of the superheated steam. S300, the temperature monitoring component monitors the temperature difference of steam at the steam inlet and outlet of the steam conveying pipeline in real time, and transmits the monitored signal to the control module. The control module adjusts the valve (6) according to the preset data command to change the opening degree of the regulating valve (6).

9. The steam desuperheating control method for a gypsum board production line according to claim 8, characterized in that, In step S200, the first power component (401) and the second power component (402) in the desuperheating water drive assembly (4) are used and standby respectively.

10. The steam desuperheating control method for a gypsum board production line according to claim 8, characterized in that, In step S200, the pressure monitor (7) monitors the pressure of the desuperheating water at the front and rear ends of the regulating valve (6) in real time, and the pressure monitor (7) transmits the monitoring data to the control module in real time. The control module adjusts the opening of the throttle valve (501) in the return water pipe (5) according to the preset data to return water to the water tank (3) so as to avoid the water pressure at the front end of the regulating valve (6) from exceeding the preset threshold.

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