What is a decompressor for decompressing and decompressing

According to whether temperature reduction and pressure reduction are integrated, it can be divided into the following two categories.

1) Integrated decompressor and pressure reducer, temperature and pressure reduction are carried out in the same deheating and pressure reducing valve.

2) Split type decompression and pressure reducer, temperature reduction and pressure reduction are carried out separately, and the pressure reduction adopts a separate pressure reducing valve Among them, the split type decompression pressure reducer has the advantages of high control accuracy, stable operation, sensitive adjustment, and can effectively remove the influence of static difference, which is widely used in:

1. Combined heat and power network central heating.

2. Power stations or industrial boilers and thermal power plants.

3. Steam inlet of heat exchange station or heat exchanger.

4. Steam power inlet of lithium bromide refrigeration unit.

5. Power and heat consumption of petrochemical, textile, papermaking, pharmaceutical, food and other production process equipment.

How to compile the model.

TK regulation, control of large categories.

w Hypothermia. y Decompression.

d electric control q pneumatic control.

f With PLC control cabinet h with PID control cabinet x without.

Column: TK-W-Y-D-H is an electric type with a PLD control cabinet for desuperheating and decompression.

Superheated high-pressure steam, we have to turn it into the temperature and pressure we need. Through the precise control of smart meters, you can have as much temperature as you want, and as much pressure as you want. Nantong Jianghan Petrochemical specializes in the production of steam desuperheater and pressure reducer.

The pressure reduction process of steam is realized by the throttling of the pressure reducing valve and the orifice plate, and the pressure reduction stage is determined by the difference in steam pressure after the new steam is depressurized. The pressure adjustment of the pressure reducing valve is completed by the electric actuator of the large actuator, which runs smoothly and has a long life, and can keep the secondary steam pressure stable according to the requirements of the secondary steam set value, no matter how the primary steam pressure fluctuates.

Desuperheating device: The desuperheating water atomization device specially designed by aerodynamic technology uses the fluid's own power to reduce the power consumption of the equipment, and the desuperheating water is crushed into mist water droplets mixed with steam and quickly and completely evaporated, so as to achieve the effect of reducing steam temperature.

A desuperheater is a device used to reduce the temperature of a fluid and is commonly used in cooling and heating processes in industrial production. According to its working principle and structural characteristics, desuperheaters can generally be divided into the following two types:

1.Recuperative desuperheater: Recuperative desuperheater reduces the temperature of a high-temperature fluid to the desired temperature by exchanging heat between a high-temperature fluid and a low-temperature fluid.

This kind of desuperheater usually adopts a shell-and-tube structure, which introduces high-temperature fluid into the shell through the pipe, and the low-temperature fluid flows through the pipe outside the shell, and the two fluids exchange heat in the shell, so as to achieve the effect of cooling. Recuperative desuperheaters have the advantage of enabling precise temperature control, but they are expensive and require a large footprint.

2.Hybrid desuperheater: A hybrid desuperheater reduces the temperature of a hot fluid to the desired temperature by mixing it with a low temperature fluid.

This type of desuperheater usually adopts a spray or jet structure, spraying or spraying a cryogenic fluid into a high-temperature fluid, and when the two fluids are mixed, the temperature of the high-temperature fluid will be reduced. The advantages of hybrid desuperheaters are their simple structure and lower cost, but their temperature control accuracy is low, and the fluid after the mixer is lead-bonded may have uneven sales and balancing.

Temperature and pressure reducer device, as the name suggests, is to reduce the high pressure and high pressure steam to the low pressure and low temperature steam (which can be superheated steam) that the customer can use. Taking the boiler superheater outlet as an example, the boiler produces steam through the heater outlet to the steam turbine to do work, the steam turbine has a range of requirements for the incoming steam parameters, if the steam parameters at the superheater outlet exceed the high limit required by the steam turbine, it will cause damage to the steam turbine. Therefore, it is necessary to use a decompression device to reduce the parameters to the applicable range.

(2) Introduction to the working principle of the desuperheating and decompressing deviceAt present, there are many structural forms of desuperheating and decompressing devices in China, but no matter what their form is, they are generally composed of desuperheating system, decompression system (or integrated system of desuperheating and decompression), main steam pipe, safety protection system, thermal control system, etc. The specific form structure is shown in the figure below. The structural components of the temperature and pressure reduction device are composed of a pressure reducing valve, a throttle orifice plate, a steam mixing pipeline (with nozzles), a safety valve, a feed water regulating valve, a throttle valve, a globe valve, a check valve, a desuperheating water pipe, a flange, and standard parts.

1. Desuperheating system: through the high-pressure differential control valve (or frequency conversion water pump, etc.), the cooling water is sprayed into the steam of the venturi pipe or steam pipeline in the form of a mist from different forms of nozzles, so that the steam temperature is reduced.

2. Pressure reducing system: It is composed of a pressure reducing valve and a throttle orifice plate, and the pressure reducing valve achieves the purpose of adjusting the pressure by changing the flow area.

3. Temperature and pressure reduction system: the temperature reduction system and the pressure reduction system are combined into one, so that the external size of the device is reduced and the technical complexity is increased. (See Figure 2 in the same color).

4. Main steam pipe body: composed of mixing pipe and steam pipe. According to the parameters provided by the user, it is the main equipment of the decompression and decompression device, and the purpose is to send the steam after decompression and decompression to the pipeline that the user needs.

5. Safety system of temperature and pressure reduction device: In order to prevent the secondary steam pressure from exceeding the specified value, the safety valve is automatically opened to discharge excess steam to achieve pressure reduction and safety protection

Equipped with a spring safety valve.

Equipped with impulse and main safety valve (one or more sets).

Equipped with lever safety valve.

6. Thermal control system of temperature and pressure reduction device: it is an important equipment to adjust the parameters of the steam outlet, by receiving the outlet temperature and pressure signals, through information processing, the command and execution mechanism makes the parameters of the outlet (temperature and pressure) stable within the range of user requirements, and realizes automatic adjustment. The control system can also be adjusted by hand.

The pressure reducing system adopts the structure of double seat pressure reducing valve, with small unbalanced force, large adjustment range, stable action and no jamming.

The desuperheating system adopts the method of venturi rewinder and flute nozzle, without transmission parts, the desuperheating water atomization effect is good, the nozzle is easy to disassemble and assemble, and it is easy to maintain.

The pressure reduction system and the temperature reduction system are separated, mainly used for poor working conditions, such as the steam flow is small and not suitable for the use of temperature reduction and pressure reduction valves, and the working conditions of saturated steam (the pressure is lower mainly considering the low steam flow rate) using venturi desuperheating mode, and the desuperheating water is fully atomized to achieve a better desuperheating effect.