CN212559527U - Heating steam control equipment and system of low-temperature multi-effect distillation seawater desalination equipment - Google Patents

Abstract

The application discloses heating steam control equipment and system of low-temperature multi-effect distillation seawater desalination equipment. The heating steam control apparatus includes: temperature thermocouple, desuperheating water governing valve, programmable steam temperature controller, heating steam flowmeter, heating steam valve and programmable heating steam flow controller, wherein: the temperature thermocouple is arranged in the hot steam conveying pipeline; the temperature-reducing water regulating valve is arranged in the temperature-reducing water conveying pipeline; the programmable steam temperature controller is connected with the temperature measuring thermocouple and the desuperheating water regulating valve; the heating steam flowmeter and the heating steam valve are arranged in a heating steam conveying pipeline; the programmable heating steam flow controller is connected with the heating steam flowmeter and the heating steam valve. Therefore, the automatic control of the temperature and the flow of the steam is realized, and the problems in the prior art are solved.

Description

Heating steam control equipment and system of low-temperature multi-effect distillation seawater desalination equipment

Technical Field

The application relates to the technical field of seawater desalination, in particular to heating steam control equipment and a heating steam control system of low-temperature multi-effect distillation seawater desalination equipment.

Background

The low-temperature multi-effect distillation seawater desalination equipment can be used for desalinating seawater so as to prepare fresh water, and heating steam is generally required to be introduced into the low-temperature multi-effect distillation seawater desalination equipment in the process so as to provide heat for seawater evaporation. At present, the heating steam introduced into the seawater desalination equipment is mainly controlled manually, so that an automatic control device is required to be provided for automatically controlling the heating steam introduced into the seawater desalination equipment by a low-temperature multi-effect distillation method.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides heating steam control equipment and a heating steam control system for low-temperature multi-effect distillation seawater desalination equipment, which are used for solving the problems in the prior art.

The embodiment of the application provides a heating steam control equipment of low temperature multiple effect distillation sea water desalination equipment, includes: temperature thermocouple, desuperheating water governing valve, programmable steam temperature controller, heating steam flowmeter, heating steam valve and programmable heating steam flow controller, wherein:

the temperature thermocouple is arranged in the hot steam conveying pipeline;

the temperature-reducing water regulating valve is arranged in the temperature-reducing water conveying pipeline;

the programmable steam temperature controller is connected with the temperature measuring thermocouple and the desuperheating water regulating valve;

the heating steam flowmeter and the heating steam valve are arranged in a heating steam conveying pipeline;

the programmable heating steam flow controller is connected with the heating steam flowmeter and the heating steam valve.

Preferably, the programmable steam temperature controller specifically includes: a PLC programmable steam temperature controller; and/or the presence of a gas in the gas,

the programmable heating steam flow controller specifically comprises: PLC programmable heating steam flow controller.

Preferably, the heating steam flow meter specifically includes: the differential pressure orifice plate heats the steam flow meter or the electromagnetic heating steam flow meter.

Preferably, the heating steam valve specifically includes: needle control valve (thermodynamic compressor).

An embodiment of the present application further provides a seawater desalination system, including: boiler equipment, low temperature multiple effect distillation method sea water desalination equipment and the heating steam control equipment that this application embodiment provided, wherein:

the temperature thermocouple is arranged in a hot steam conveying pipeline of the boiler equipment;

the outlet end of the heating steam conveying pipeline is connected with the low-temperature multi-effect distillation seawater desalination equipment.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

adopt the hot steam controlgear that this application embodiment provided, it includes temperature thermocouple, desuperheating water governing valve, programmable steam temperature controller, heating steam flowmeter, heating steam valve and programmable heating steam flow controller, wherein: the temperature thermocouple is arranged in the hot steam conveying pipeline; the temperature-reducing water regulating valve is arranged in the temperature-reducing water conveying pipeline; the programmable steam temperature controller is connected with the temperature measuring thermocouple and the desuperheating water regulating valve; the heating steam flowmeter and the heating steam valve are arranged in a heating steam conveying pipeline; the programmable heating steam flow controller is connected with the heating steam flowmeter and the heating steam valve. Like this, the steam temperature controller that can programme on the one hand can control the aperture of cooling water governing valve through the measurement of temperature thermocouple to steam temperature to the temperature of control heating steam, on the other hand can control the aperture of heating steam valve through the measurement of heating steam flowmeter for the steam flow controller that can programme, thereby the flow of control heating steam realizes carrying out automatic control to the temperature and the flow of steam, solves prior art's problem.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic diagram of a seawater desalination system according to the prior art;

fig. 2 is a schematic structural diagram of a seawater desalination system provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of another seawater desalination system provided in the embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the directional terms mentioned in the present invention, such as: upper, lower, front, rear, left, right, top, bottom, inner, outer, etc. are based on the orientation or positional relationship shown in the drawings for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a conventional seawater desalination system, which mainly includes a boiler device 11 and a low-temperature multi-effect distillation seawater desalination device 12 connected thereto, where the boiler device 11 is configured to generate hot steam (the temperature of the hot steam is usually around 320 ℃), and to deliver the hot steam to the low-temperature multi-effect distillation seawater desalination device 12 through a connection pipeline, so as to provide heat for seawater desalination. However, the temperature, flow rate, and the like of the hot steam are mainly controlled by human labor at present, but are limited by defects of human beings, and are generally difficult to accurately control.

Based on this, the embodiment of the present application provides a seawater desalination system, which can be used to solve this problem. Fig. 2 is a schematic structural diagram of the seawater desalination system 20, which includes a boiler device 21, a low-temperature multi-effect distillation seawater desalination device 22, and a heating steam control device 23, where the heating steam control device 23 is disposed between the boiler device 21 and the low-temperature multi-effect distillation seawater desalination device 22, and the heating steam control device 23 is used to control steam temperature and flow rate, so that when hot steam generated in the boiler device 21 enters the low-temperature multi-effect distillation seawater desalination device 22 through the heating steam control device 23, steam flow rate and temperature can be automatically controlled.

As shown in fig. 3, one part (a in fig. 3, referred to as a temperature controller a) is used to control the temperature of the steam, for example, a certain amount of desuperheater is introduced into the desuperheater, so that the temperature of the hot steam is reduced to the heating steam (usually about 160-180 ℃); the other part (B in fig. 3, referred to as a flow controller B) is used for controlling the flow of the heating steam, wherein the temperature of the heating steam can be reduced by heat exchange between the heating steam and the desuperheating water in the desuperheater, and the subsequent temperature of the heating steam can be directly influenced by the amount of the desuperheating water in the desuperheater.

The temperature controller a mainly includes a temperature thermocouple 231, a temperature-reducing water regulating valve 232, and a programmable steam temperature controller 233. The temperature thermocouple 231 is disposed in the heating steam delivery pipe outputted from the desuperheater, and is used for measuring the temperature of the heating steam flowing out of the desuperheater. The desuperheating water regulating valve 232 is disposed in the desuperheating water conveying pipe, and the programmable steam temperature controller 233 is connected with the temperature thermocouple 231 and the desuperheating water regulating valve 232. Thus, the temperature of the heating steam can be measured by the thermocouple 231, and the measurement result is transmitted to the programmable steam temperature controller 233, and the opening degree of the desuperheating water adjusting valve 232 is controlled by the programmable steam temperature controller 233 so that a certain amount of desuperheating water is input to the desuperheater to control the temperature of the heating steam.

In practical applications, the temperature-reducing water regulating valve 232 may be a pneumatic or electric regulating valve (gate valve) or the like; the programmable steam temperature controller 233 may generally be a PLC programmable steam temperature controller.

For flow controller B, it consists essentially of a heating steam flow meter 234, a heating steam valve 235, and a programmable heating steam flow controller 236. The heating steam flow meter 234 and the heating steam valve 235 are disposed in a heating steam delivery pipe, and an outlet end of the heating steam delivery pipe may be connected to the low-temperature multi-effect distillation seawater desalination apparatus 22 through a thermal compressor, so as to deliver heating steam to the low-temperature multi-effect distillation seawater desalination apparatus 22. The programmable heating steam flow controller 236 is connected with the heating steam flow meter 234 and the heating steam valve 235, so that the flow of the heating steam introduced into the low-temperature multi-effect distillation seawater desalination equipment 22 can be measured through the heating steam flow meter 234, the measurement result is fed back to the programmable heating steam flow controller 236, and the opening degree of the heating steam valve 235 is adjusted through the programmable heating steam flow controller 236 to control the flow of the heating steam.

In practice, the programmable heating steam flow controller 236 may be generally a PLC programmable heating steam flow controller, and the heating steam flow meter 234 may be generally a differential pressure orifice heating steam flow meter or an electromagnetic heating steam flow meter. For the heating steam valve 235, it may also be a needle control valve (heat compressor).

In addition, an alarm prompter may be additionally disposed in the seawater desalination system 20, and a steam quick-closing door detector is additionally disposed, and is configured to detect whether the steam quick-closing door is closed, and connect the steam quick-closing door detector with the alarm prompter, and when the steam quick-closing door detector detects that the steam quick-closing door is closed, an alarm is given through the alarm prompter.

Of course, a steam pressure detector may be additionally provided for detecting the pressure of the heating steam, and the steam pressure detector is connected to the alarm prompting device, and when the pressure of the heating steam is detected to exceed a preset range (for example, lower than 0.20MPa or exceed 0.65MPa), an alarm is given through the alarm prompting device.

In order to facilitate understanding of the present application, the seawater desalination system and the hot steam control apparatus may be described below with reference to specific scenarios.

In practical application, the temperature and the flow rate of the required heating steam can be determined according to the load requirement of the low-temperature multi-effect distillation seawater desalination equipment, for example, the temperature of the hot steam generated from boiler equipment is about 320 ℃, the hot steam can be adjusted to the heating steam of about 160-180 ℃ through heating steam control equipment, and the flow rate of the heating steam is controlled.

In addition, when the flow rate of the heating steam is adjusted, a set value of the flow rate may be set in advance in the heating steam flow rate controller, the flow rate of the heating steam may be detected in real time by the heating steam flow meter, and the detected flow rate may be compared with the set value to control the opening degree of the heating steam valve. For example, when the detected flow rate is smaller than a set value, the opening degree of the heating steam valve is controlled to be increased; on the contrary, when the detected flow is larger than the set value, the opening degree of the heating steam valve is controlled to be reduced.

In addition, in practical applications, in consideration of protection of equipment, it is generally necessary to set an upper limit and a lower limit for the flow rate of the heating steam, and when the actual flow rate of the heating steam is greater than the upper limit or less than the lower limit, an alarm is issued.

Through the seawater desalination system provided in the embodiment of the application, the temperature and the flow of the heated steam are automatically controlled, so that on one hand, the artificial adjustment intervention degree can be reduced, the artificial misoperation probability is reduced, the accurate control is realized, and in addition, the damage to equipment can be reduced by setting modes such as alarming.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (5)

1. A heating steam control device of a low-temperature multi-effect distillation seawater desalination device is characterized by comprising: temperature thermocouple, desuperheating water governing valve, programmable steam temperature controller, heating steam flowmeter, heating steam valve and programmable heating steam flow controller, wherein:

the temperature thermocouple is arranged in the hot steam conveying pipeline;

the temperature-reducing water regulating valve is arranged in the temperature-reducing water conveying pipeline;

the programmable steam temperature controller is connected with the temperature measuring thermocouple and the desuperheating water regulating valve;

the heating steam flowmeter and the heating steam valve are arranged in a heating steam conveying pipeline;

the programmable heating steam flow controller is connected with the heating steam flowmeter and the heating steam valve.

2. The heating steam control apparatus as claimed in claim 1,

the programmable steam temperature controller specifically comprises: a PLC programmable steam temperature controller; and/or the presence of a gas in the gas,

the programmable heating steam flow controller specifically comprises: PLC programmable heating steam flow controller.

3. The heating steam control device of claim 1, wherein the heating steam flow meter specifically comprises: the differential pressure orifice plate heats the steam flow meter or the electromagnetic heating steam flow meter.

4. The heating steam control apparatus as claimed in claim 1, wherein the heating steam valve specifically includes: a needle control valve.

5. A seawater desalination system, comprising: boiler equipment, low-temperature multi-effect distillation seawater desalination equipment and the heating steam control equipment of any one of claims 1 to 4, wherein:

the temperature thermocouple is arranged in a hot steam conveying pipeline of the boiler equipment;

the outlet end of the heating steam conveying pipeline is connected with the low-temperature multi-effect distillation seawater desalination equipment.

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