阅读说明：本技术 一种无排汽自动疏水装置及其疏水方法 (Automatic drainage device without steam exhaust and drainage method thereof ) 是由 张筠 张�林 张慎之 付东青 潘安华 于 2020-07-14 设计创作，主要内容包括：一种无排汽自动疏水装置,包括疏水水箱,疏水水箱的顶部连通有用于与外部水蒸汽管道连通的进水管道,疏水水箱的底部连通有用于排水的排水管道,排水管道上还连通有用于自动排水的疏水管道,在疏水管道上安装有疏水调节阀,疏水水箱上安装有与疏水调节阀联动设置的液位计。该装置还包括用于控制整个装置自动运行的控制装置,控制装置包括控制器和便于控制器安装的控制箱,疏水调节阀与控制器的输出端连接,液位计与控制器的输入端连接。该装置用于对蒸汽管道进行疏水,通过疏水水箱、液位计和疏水调节阀的配合,能够实现只疏水不排汽,减少热能及工质损失,避免了能源的大量浪费,并且避免蒸汽外排对外部环境造成污染。(The utility model provides an automatic hydrophobic device of no steam extraction, includes hydrophobic water tank, hydrophobic water tank's top intercommunication has the inlet channel that is used for with outside steam conduit intercommunication, and hydrophobic water tank's bottom intercommunication has the drainage pipe that is used for the drainage, and drainage pipe is last still to communicate to have the hydrophobic pipeline that is used for automatic drainage, installs hydrophobic governing valve on hydrophobic pipeline, installs the level gauge that sets up with hydrophobic governing valve linkage on the hydrophobic water tank. The device also comprises a control device for controlling the automatic operation of the whole device, the control device comprises a controller and a control box convenient for the installation of the controller, the drain regulating valve is connected with the output end of the controller, and the liquid level meter is connected with the input end of the controller. The device is used for draining the steam pipeline, and through the cooperation of hydrophobic water tank, level gauge and hydrophobic governing valve, can realize only hydrophobic not steam extraction, reduces heat energy and working medium loss, has avoided the a large amount of wastes of the energy to avoid the outer row of steam to cause the pollution to the external environment.)

1. The utility model provides a no automatic hydrophobic means of steam extraction which characterized in that: the device includes hydrophobic water tank, and hydrophobic water tank's top intercommunication has the inlet channel that is used for with outside steam conduit intercommunication, and hydrophobic water tank's bottom intercommunication has the drainage pipe that is used for the drainage, and drainage pipe is last still to communicate to have the hydrophobic pipeline that is used for automatic drainage, installs the hydrophobic governing valve on hydrophobic pipeline, installs the level gauge that sets up with the linkage of hydrophobic governing valve on hydrophobic water tank.

2. The steam-exhaust-free automatic drainage device according to claim 1, characterized in that: the device also comprises a control device for controlling the automatic operation of the whole device, the control device comprises a controller and a control box convenient for the installation of the controller, the drain regulating valve is connected with the output end of the controller, and the liquid level meter is connected with the input end of the controller.

3. The steam-exhaust-free automatic drainage device according to claim 1, characterized in that: the drain control valve is an electric cage type high-pressure control valve.

4. The steam-exhaust-free automatic drainage device according to claim 1, characterized in that: the liquid level meter is a radio frequency capacitance liquid level meter.

5. The steam-exhaust-free automatic drainage device according to claim 1, characterized in that: and a filter screen for filtering sundries in the drainage water tank is also arranged in the drainage water tank.

6. The steam-exhaust-free automatic drainage device according to claim 1, characterized in that: the drain pipes on two sides of the drain regulating valve are respectively provided with a first stop valve and a second stop valve.

7. The steam-exhaust-free automatic drainage device according to claim 1, characterized in that: the water inlet pipeline is provided with a water inlet stop valve, and the drainage pipeline is provided with a drainage stop valve.

8. A drainage method of a non-exhaust automatic drainage device is characterized by comprising the following steps: the method uses the steam-exhaust-free automatic drainage device according to any one of claims 1 to 7, and comprises the following steps:

(1) condensed water with steam in an external steam pipeline enters the drainage water tank through a water inlet pipeline, the condensed water is settled at the lower part of the drainage water tank, the steam in the condensed water floats at the upper part of the drainage water tank, and a liquid level meter detects the water level in the drainage water tank in real time;

(2) when the water level in the drainage water tank is higher than a preset minimum water level, the drainage regulating valve starts to be opened, water in the drainage water tank is discharged outwards from the bottom of the drainage water tank through a drainage pipeline, the opening degree of the drainage regulating valve is increased along with the rise of the water level of the drainage water tank, and the drainage regulating valve is opened to the maximum opening degree until the water level of the drainage water tank reaches the preset maximum water level;

(3) and after the water level in the drainage water tank is lower than the preset lowest water level, closing the drainage regulating valve and stopping discharging water outwards.

9. The steam-exhaust-free automatic drainage device according to claim 8, characterized in that: the corresponding relation between the opening of the drainage regulating valve and the water level in the drainage water tank is as follows: dividing the height between the preset highest water level and the preset lowest water level into 100 equal parts, dividing the opening between the maximum opening and the minimum opening (namely, the valve is closed) of the hydrophobic regulating valve into 100 equal parts, and corresponding the height of the 100 equal parts to the opening of the 100 equal parts one by one.

Technical Field

The invention relates to the technical field of water vapor treatment, in particular to a steam-emission-free automatic drainage device and a drainage method of the steam-emission-free automatic drainage device.

Background

The steam turbine is also called as a steam turbine engine, and is a rotary steam power device.A high-temperature high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto blades, so that a rotor provided with blade rows rotates, and simultaneously, the rotor does work outwards. Steam turbines are the main equipment of modern thermal power plants, and are also used in the metallurgical industry, chemical industry and ship power plants.

At present, in the use process of steam turbine thermal equipment of a power plant, hot steam can be directly discharged outwards when a steam turbine discharges condensed water, and a large amount of energy is wasted.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a steam-exhaust-free automatic drainage device which is reasonable in design, can automatically perform drainage treatment, drains water only and does not exhaust steam.

The invention also provides a water drainage method of the automatic water drainage device without steam exhaust.

The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a steam-exhaust-free automatic drainage device, which comprises a drainage water tank, wherein the top of the drainage water tank is communicated with a water inlet pipeline communicated with an external steam pipeline, the bottom of the drainage water tank is communicated with a drainage pipeline for drainage, the drainage pipeline is also communicated with a drainage pipeline for automatic drainage, a drainage regulating valve is arranged on the drainage pipeline, and a liquid level meter which is in linkage arrangement with the drainage regulating valve is arranged on the drainage water tank.

The technical problem to be solved by the invention can be further realized by the following technical scheme that for the steam-exhaust-free automatic drainage device, the device also comprises a control device for controlling the automatic operation of the whole device, the control device comprises a controller and a control box convenient for the installation of the controller, a drainage regulating valve is connected with the output end of the controller, and a liquid level meter is connected with the input end of the controller.

The technical problem to be solved by the invention can be further realized by the following technical scheme that for the steam-exhaust-free automatic drainage device, the drainage regulating valve is an electric cage type high-pressure regulating valve

The technical problem to be solved by the invention can be further realized by the following technical scheme that for the automatic drainage device without steam exhaust, the liquid level meter is a radio frequency capacitance liquid level meter.

The technical problem to be solved by the invention can be further realized by the following technical scheme that for the automatic drainage device without steam exhaust, a filter screen for filtering sundries in drainage is also arranged in the drainage water tank.

The technical problem to be solved by the invention can be further realized by the following technical scheme that for the automatic drainage device without steam exhaust, a first stop valve and a second stop valve are respectively arranged on drainage pipelines at two sides of a drainage regulating valve.

The technical problem to be solved by the invention can be further realized by the following technical scheme that for the automatic drainage device without steam exhaust, a water inlet stop valve is arranged on a water inlet pipeline, and a water drainage stop valve is arranged on a water drainage pipeline.

The technical problem to be solved by the invention can be further realized by the following technical scheme, and for the above automatic drainage device without steam exhaust, the drainage method of the automatic drainage device without steam exhaust comprises the following steps:

(1) condensed water with steam in an external steam pipeline enters the drainage water tank through a water inlet pipeline, the condensed water is settled at the lower part of the drainage water tank, the steam in the condensed water floats at the upper part of the drainage water tank, and a liquid level meter detects the water level in the drainage water tank in real time;

(2) when the water level in the drainage water tank is higher than a preset minimum water level, the drainage regulating valve starts to be opened, water in the drainage water tank is discharged outwards from the bottom of the drainage water tank through a drainage pipeline, the opening degree of the drainage regulating valve is increased along with the rise of the water level of the drainage water tank, and the drainage regulating valve is opened to the maximum opening degree until the water level of the drainage water tank reaches the preset maximum water level;

(3) and after the water level in the drainage water tank is lower than the preset lowest water level, closing the drainage regulating valve and stopping discharging water outwards.

The technical problem to be solved by the invention can be further realized by the following technical scheme that for the drainage method of the steam-exhaust-free automatic drainage device, the corresponding relation between the opening degree of the drainage regulating valve and the water level in the drainage water tank is as follows: dividing the height between the preset highest water level and the preset lowest water level into 100 equal parts, dividing the opening between the maximum opening and the minimum opening (namely, the valve is closed) of the hydrophobic regulating valve into 100 equal parts, and corresponding the height of the 100 equal parts to the opening of the 100 equal parts one by one.

Compared with the prior art, the drainage water tank is communicated with the external steam pipeline through the water inlet pipeline and is used for guiding the condensed water in the external steam pipeline into the drainage water tank so as to realize the drainage of the condensed water; part of steam enters the drainage water tank along with the condensed water in the drainage process, however, the drainage pipeline at the bottom of the drainage water tank is subjected to liquid sealing by the condensed water entering the drainage water tank, so that the steam is prevented from being discharged from the drainage pipeline, and the purposes of only discharging water and not discharging steam are realized; the liquid level meter detects the water level in the drainage water tank in real time, the drainage regulating valve is controlled according to the water level change to control the opening of the drainage pipeline, and the condensed water in the drainage water tank is automatically discharged outwards; secondly, the drainage pipeline can be manually opened to manually drain the condensed water in the drainage water tank. The device is used for draining the steam pipeline, and through the cooperation of hydrophobic water tank, level gauge and hydrophobic governing valve, can realize only hydrophobic not steam extraction, reduces heat energy and working medium loss, has avoided the a large amount of wastes of the energy to avoid the outer row of steam to cause the pollution to the external environment.

Drawings

FIG. 1 is a schematic diagram of a structure of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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 invention.

Referring to fig. 1, the automatic drainage device without steam exhaust comprises a drainage water tank 1, wherein a water inlet pipeline 2 communicated with an external steam pipeline 3 is communicated with the top of the drainage water tank 1, a drainage pipeline 4 used for drainage is communicated with the bottom of the drainage water tank 1, a drainage pipeline 5 used for automatic drainage is communicated with the drainage pipeline 4, a drainage regulating valve 6 is installed on the drainage pipeline 5, and a liquid level meter 7 which is in linkage with the drainage regulating valve 6 is installed on the drainage water tank 1. The drainage pipeline 4 is used for guiding the condensed water of the external steam pipeline to the drainage water tank 1, so that the condensed water can be conveniently discharged; the drainage water tank 1 is arranged for containing condensed water and steam entering together with the condensed water, the condensed water entering the drainage water tank 1 can carry out liquid seal on a communication part between the drainage pipeline 4 and the drainage water tank 1, and the steam is prevented from being discharged outside, so that the waste of resources caused by the fact that the steam in an external steam pipeline leaks along with the condensed water in a large amount can be avoided; hydrophobic governing valve 6 links with level gauge 7, and the change of 1 water level of hydrophobic water tank according to level gauge 7 detection is through hydrophobic pipeline 5 outside drainage, remains certain water yield in keeping hydrophobic water tank 1 all the time in the drainage, avoids getting into the outer row of steam in hydrophobic water tank 1, realizes only hydrophobic not steam extraction.

The device also comprises a control device 8 for controlling the automatic operation of the whole device, wherein the control device 8 comprises a controller and a control box convenient for the installation of the controller, the drain regulating valve 6 is connected with the output end of the controller, and the liquid level meter 7 is connected with the input end of the controller. The controller adopts a PLC in the prior art and is used for receiving a liquid level signal detected by the liquid level meter 7, then controlling the action of the drain regulating valve 6 according to the liquid level signal, specifically, when the liquid level of the drain water tank 1 rises, the capacitance is increased, the radio frequency circuit converts the change into an analog signal to output 4-20mA DC, the analog signal is input into the control box, the control box inputs a control signal (4-20mADC) to the drain regulating valve 6, and the opening of the drain regulating valve 6 is controlled; in practice, the controller can transmit the liquid level signal to the external DCS control system and receive the instruction sent by the external DCS control system, so that the remote monitoring of the device by an operator is facilitated.

The drain control valve 6 is an electric cage type high-pressure control valve, which refers to a cage type high-pressure control valve in the prior art and comprises a straight-stroke electric actuating mechanism and a low flow resistance straight-through control valve body, the electric actuating mechanism is of an integrated structure and is internally provided with a servo amplifier, and the opening of the valve can be controlled by inputting a control signal (4-20mADC) and a power supply, so that the liquid level parameter can be adjusted.

The liquid level meter 7 is a radio frequency capacitance liquid level meter 7. The radio frequency capacitance liquid level meter 7 is a capacitance liquid level meter 7 in the prior art, is a device for converting the position change of a measured object into capacitance, and can measure high-temperature, high-pressure and corrosive liquid level; the working principle is as follows: the probe rod of the liquid level meter 7 and the wall of the water drainage tank 1 are regarded as two parallel electrode plates, the measured liquid is regarded as a medium between the two electrode plates, a simple capacitor is formed, when the liquid level rises, the capacitance is increased, and the radio frequency circuit converts the change into an analog signal to be output.

Still install in the hydrophobic water tank 1 and be arranged in carrying out filterable filter screen 13 to debris in the hydrophobic, filter screen 13 adopts stainless steel filter screen 13, transversely perhaps installs in hydrophobic water tank 1 with the slope, separates inlet channel 2 and hydrophobic water tank 1's intercommunication department, drainage pipe 4 and hydrophobic water tank 1's intercommunication department to can avoid the debris that get into hydrophobic water tank 1 from drainage pipe 4 can not discharge into hydrophobic adjusting valve 6 from drainage pipe 4, avoid debris to cause the damage of hydrophobic adjusting valve 6.

Install first stop valve 9 and second stop valve 10 on the drain pipe 5 of drain control valve 6 both sides respectively for open or close drain pipe 5 from drain control valve 6 both sides respectively, be convenient for maintain or overhaul drain pipe 5 and drain control valve 6.

A water inlet stop valve 11 is arranged on the water inlet pipeline 2 and used for controlling the opening or closing of the water inlet pipeline 2 and controlling the water inlet of the drainage water tank 1; a drain stop valve 12 is installed on the drain pipe 4 for controlling the opening and closing of the drain pipe 4 to manually drain the drain tank 1.

The first stop valve 9, the second stop valve 10, the water inlet stop valve 11 and the water outlet stop valve 12 are all stop valves in the prior art.

A drainage method of a non-exhaust automatic drainage device comprises the following steps:

(1) condensed water with steam in an external steam pipeline 3 enters a drainage water tank 1 through a water inlet pipeline 2, the condensed water is settled at the lower part of the drainage water tank 1, the steam in the condensed water floats at the upper part of the drainage water tank 1, and a liquid level meter 7 detects the water level in the drainage water tank 1 in real time;

(2) when the water level in the drainage water tank 1 is higher than the preset lowest water level, the drainage regulating valve 6 starts to be opened, water in the drainage water tank 1 is discharged outwards from the bottom of the drainage water tank 1 through the drainage pipeline 5, the opening degree of the drainage regulating valve 6 is increased along with the rise of the water level of the drainage water tank 1, and the drainage regulating valve 6 is opened to the maximum opening degree until the water level of the drainage water tank 1 reaches the preset highest water level;

(3) and after the water level in the drainage water tank 1 is lower than the preset minimum water level, the drainage regulating valve 6 is closed, and the water is stopped being discharged outwards.

The corresponding relation between the opening of the drainage regulating valve 6 and the water level in the drainage water tank 1 is as follows: dividing the height between a preset highest water level and a preset lowest water level into 100 equal parts, dividing the opening between the maximum opening and the minimum opening (namely valve closing) of the drainage regulating valve 6 into 100 equal parts, corresponding the height of the 100 equal parts to the opening of the 100 equal parts one by one, closing the drainage regulating valve 6 after the water level of the drainage water tank 1 is lower than the preset lowest water level, opening the drainage regulating valve 6 after the water level of the drainage water tank 1 is higher than the preset lowest water level, matching the opening with the height corresponding to the water level, wherein the higher the water level is, the larger the opening of the drainage valve is until the water level of the drainage water tank 1 reaches the preset highest water level, and opening the maximum opening of the drainage regulating valve 6 to realize automatic and dynamic; after the water level of the drainage water tank 1 is lower than the preset highest water level, the opening degree of the drainage regulating valve 6 is reduced, the opening degree is matched with the height corresponding to the water level, the lower the water level is, the smaller the opening degree of the drainage valve is, and the drainage regulating valve 6 is closed and stops drainage until the water level of the drainage water tank 1 is lower than the preset lowest water level.

Meanwhile, water in the drainage water tank 1 can be discharged outwards through the drainage pipeline 4 at any time, but a certain amount of water is ensured in the drainage water tank 1, so that steam in the drainage water tank 1 is prevented from being discharged from the drainage pipeline 4;

presetting the highest water level and presetting minimum water level and setting for according to concrete actual conditions, generally presetting the highest water level and being three quarters of the height of water drainage tank 1, leaving certain space for the steam in the condensate water, presetting the minimum water level and being one quarter of the height of water drainage tank 1, keeping certain water yield and carrying out liquid seal to the place where water drainage tank 1 and drainage pipe 4 communicate, avoiding the steam in water drainage tank 1 to discharge through drainage pipe 4, reaching the purpose that only the drainage does not discharge.