KR101129917B1 - An apparatus for cleaning a heat-exchanging machine - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger automatic cleaning device, and more particularly, to improve the performance of a heat exchanger that lowers the heat of compression generated during compression of a large-sized compressor, and is accumulated in the heat exchanger by changing the coolant flow in the heat exchanger. The present invention relates to a heat exchanger automatic cleaning device capable of minimizing scale and sludge, thereby preventing thermal conductivity from lowering due to scale or sludge and maintaining heat exchange efficiency at an optimal state at all times.

The present invention is the main head pipe 120 having a plurality of branch pipes (200-1) connected to the drain line (30-1), and the pressure reducing valve for adjusting the pressure of the gas supplied to the main head pipe (120) 110, the cooler discharge temperature sensor 330 for detecting the coolant temperature discharged from the heat exchanger, and the drain valve 30-1 when the temperature of the coolant detected by the cooler discharge temperature sensor 330 is greater than or equal to a set value. It characterized in that it comprises a control unit 300 for adjusting the amount of gas supplied through.

heat transmitter

Description

An apparatus for cleaning a heat-exchanging machine

1 is a view showing a conventional heat exchanger.

2 is a view showing a heat exchanger automatic cleaning device.

3 is a view showing a control unit of the present invention.

Figure 4 is a view showing a state in which the heat exchanger automatic cleaning device according to the present invention attached to the heat exchanger.

<Description of the symbols for the main parts of the drawings>

10: heat exchanger cylinder 20: tube

30-1: Drain valve 40: Gas inlet

50: gas outlet 60: cooling water inlet

70: cooling outlet 80-1: baffle plate

100-1,100-2: Pressure gauge 120: Main head piping

130: drain side 300: control unit

330: cooler discharge temperature sensor 500: pressure gauge

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger automatic cleaning device, and more particularly, to improve the performance of a heat exchanger that lowers the heat of compression generated during compression of a large-sized compressor. The present invention relates to a heat exchanger automatic cleaning device capable of minimizing scale and sludge, thereby preventing thermal conductivity from lowering due to scale or sludge and maintaining heat exchange efficiency at an optimum state at all times.

1 is a view showing a conventional heat exchanger, the conventional heat exchanger is the gas introduced through the hot gas inlet 40 is discharged through the gas outlet (50). At this time, in order to cool the hot gas, a plurality of tubes 20 are installed in a passage through which the hot gas moves. The hot gas introduced through the gas inlet 40 is cooled by the coolant outside the tube 20 in the process of being discharged through the gas outlet 50 after passing through the tube 20, the cooling water is a baffle plate ( 80-1: baffle plate) is discharged through the cooling outlet 70 while moving up and down. The temperature of the cooling water is higher than the temperature of the cooling water inlet 60, the temperature of the cooling water outlet 70. The temperature of the gas is lower than the temperature of the gas inlet 40 is the temperature of the gas outlet (50). This is done by heat exchange by the heat conduction of the tube 20. On the other hand, reference numeral 30-1 is a drain valve.

In the conventional heat exchanger, a high temperature working fluid enters the tube side and goes out to a temperature lower than the inlet temperature through heat exchange with the cooling water. After it is discharged. At this time, the scale, sludge, etc. accumulate and adhere to both sides of the bottom of the baffle plate gradually during use for a certain period of time, thereby decreasing the heat exchange rate. In addition, this prevents the flow of water by reducing the cooling water flow area, and the cooling water maintains a constant state so that the cooling water passage is gradually closed by passing the tube through the laminar flow with no change in flow velocity. Due to this, there is a problem such as tube loss due to obstacles to smooth sliding of the tube and the baffle plate.

In addition, when the inside of the heat exchanger is cleaned, the compressor is stopped. As a result, when the inside of the heat exchanger is cleaned with chemicals, chemical costs and waste water treatment costs are incurred. In addition, by stopping the compressor as much as the cleaning work schedule, there is a difficulty in efficient operation of the equipment, and in the process of starting and stopping the compressor, there is a problem of shortening the life of the equipment due to the difference in thermal expansion according to the difference in the heat exchanger material.

The present invention is to solve the above problems, by connecting a plurality of pipes to the lower drain line in the heat exchanger to supply a gas with a high pressure such that the cooling water does not flow back to the flow of cooling water from the normal laminar flow to turbulent flow It is an object of the present invention to provide a heat exchanger automatic cleaning device that prevents solids such as scale / sludge from accumulating inside the heat exchanger.

In the heat exchanger having a plurality of drain valves for cooling the gas in the tube by the tube discharged after the high-temperature gas is introduced and the cooling water moving to the outside of the tube, the discharge valve for discharging the cooling water in the lower portion of the tube. , A main head pipe 120 having a plurality of branch pipes 200-1 connected to the drain valve 30-1, and a pressure reducing valve for adjusting a pressure of a gas supplied to the main head pipe 120. 110, the cooler discharge temperature sensor 330 for detecting the coolant temperature discharged from the heat exchanger, and the drain valve 30-1 when the temperature of the coolant detected by the cooler discharge temperature sensor 330 is equal to or greater than a set value. It characterized in that it comprises a control unit 300 for adjusting the amount of gas supplied through.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

2 is a view showing a heat exchanger automatic cleaning device, Figure 3 is a view showing a control unit of the present invention, Figure 4 is a view showing a state in which the heat exchanger automatic cleaning device according to the present invention attached to the heat exchanger, the present invention As shown in FIG. 2, the gas discharged after the high temperature gas is introduced and the tube is discharged by the cooling water moving to the outside of the tube, but has a drain valve for discharging the cooling water under the tube. In many heat exchangers, a main head pipe 120 having a plurality of branch pipes 200-1 connected to the drain valve 30-1, and a pressure of a gas supplied to the main head pipe 120 are adjusted. The pressure of the pressure reducing valve 110, the cooler discharge temperature sensor 330 for detecting the gas temperature discharged from the heat exchanger, and the temperature of the gas detected by the cooler discharge temperature sensor 330 is more than a set value Including the right drain valve controller 300 to control the amount of gas supplied through the (30-1) characterized in that it is made. Hereinafter, each member is explained in full detail.

The heat exchanger is composed of a heat exchanger cylinder (10) and a tube (20) which is discharged after the gas is introduced into the heat exchanger cylinder, wherein one side of the heat exchanger cylinder (10) provides coolant in the heat exchanger cylinder (10). Cooling water inlet 60 and cooling water outlet 70 are formed to cool the hot gas flowing through the tube 20.

On the other hand, the gas outlet 50 and the gas inlet 40 is formed in communication with the tube in order to send a high temperature gas into the tube 20. A plurality of drain valves 30-1 are formed below the heat exchanger cylinder 10.

The main head pipe 120 is connected by the heat exchanger and the flexible hose 220-1, made of a container that can store the gas, the branch pipe for supplying gas to the drain valve (30-1) 200-1). In addition, the pressure reducing valve 110 to adjust the gas supply pressure on one side. Pressure gauges 100-2 and 100-1 are mounted at both ends of the pressure reducing valve 110 to measure the pressure flowing into the main head pipe 120 through the pressure reducing valve 110.

In addition, the branch pipe 200-1 is equipped with an electromagnetic valve 210-1, and the gas passing through the electromagnetic valve 210-1 passes through the flexible hose 220-1, and then the drain valve 30-1. It is configured to supply gas to the cooling water in the heat exchanger through).

On the other hand, the control unit 300 is configured to control each electronic valve (210-1), the control unit 300 and the cooler discharge temperature sensor 330 is connected by a temperature sensor detection line 320. In addition, the controller wire 310-1 is connected between the electronic valve 210-1 and the controller 300.

The main head pipe 120 is equipped with a pressure gauge 500, the pressure gauge 500 measures the pressure in the main head pipe 120 and transmits to the control unit 300. On the other hand, the main head pipe 120 is installed when the drain side 130 is used to exhaust the gas in the main head pipe 120.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation and function of the present invention. Normally, the electromagnetic valve 210-1 and the drain valve 30-1 connected to the main head pipe 120 are in a closed state. When the discharge temperature rises above the set value from the cooler discharge temperature sensor 330, a signal output from the control unit 300 is sent to the electromagnetic valve, the electronic valve 210-1 is opened, and the high pressure gas contained in the main head pipe 120 is discharged. Passing through the drain valve (30-1) to bubbling (bubbling) in the cooling water in the heat exchanger.

Thereafter, the gas passing through the drain valve 30-1 is injected into the coolant to change the flow of the coolant into a turbulent flow. As a result, the turbulent coolant moves to remove the sludge, scale, and the like, which are attached to the shell of the baffle plate 80-1 and the tube 20. That is, as the gas rises inside the cooling water, bubbling occurs in the cooling water, and at the same time, the flow of the cooling water is changed, thereby accumulating sludge and the like. On the other hand, when the sludge is stacked on the bottom of the main head pipe 120, when the drain side 130 is partially opened, the sludge accumulated on the floor can be easily discharged to the outside.

Gas cooler Before air cleaning
Discharge gas temperature (℃) After air cleaning
Discharge gas temperature (℃) Temperature difference (℃) 1 stage 68.39 45.2 -23.19 2nd stage 63.22 45.7 -17.52 3-stage 35.80 35.1 -0.70 4-stage 66.10 37.1 -29.0 5 steps 63.20 44.0 -19.2

* Gas temperature is lowered by 17 ~ 29 ℃ as shown in the above table so that it can be cleaned stably without stopping the equipment *

According to the present invention, there is an effect of removing the scale, sludge, etc. accumulated in the cooler by changing the flow of coolant in the heat exchanger. In addition, by preventing accumulation of scale and sludge, the state inside the cooler is kept clean so that the thermal conductivity between the working fluid and the cooling water is not lowered, thereby improving heat exchange efficiency, which is an original purpose of the heat exchanger. In addition, the amount of pressure is increased by the contraction of the gas, there is an effect to improve the efficiency of the compressor and reduce the power cost. In addition, there is an effect that can be stably cleaned without stopping the equipment can be stable and efficient management of the equipment.

Claims (2)

A heat exchanger cylinder 10 having a plurality of drain valves 30-1 on the bottom surface thereof, and disposed inside the heat exchanger cylinder 10 to be discharged after the high temperature gas flows in, but is horizontal based on the installation surface. A plurality of tubes 20 in which gas flow is maintained in one direction, one end of which is coupled to the inside of the heat exchanger cylinder 10, and the other end of which forms an opening, wherein the openings are alternately formed in an upper direction and a lower direction. It includes a baffle plate (80-1), the gas heat exchanged between the cooling water flowing through the gas inlet 40 and circulating inside the heat exchanger cylinder 10 passes through the gas outlet 50 to discharge to the outside A heat exchanger having a cooler discharge temperature sensor 330 detecting a temperature of the gas discharged on one side of the gas outlet 50; And One side is provided with a pressure gauge 500 and the main head pipe 120 having a decompression valve 100 for adjusting the pressure of the gas supplied from the outside, and the gas is connected to the main head pipe 120 is supplied A plurality of branch pipes 200-1 connected to the plurality of drain valves 30-1, each of which has an electromagnetic valve 210-1 installed thereon, and exhaust gases measured by the cooler discharge temperature sensor 330. When the temperature is more than the set value, the automatic cleaning device having a control unit 300 for supplying the high-pressure gas contained in the main head pipe 120 to the cooling water in the heat exchanger through the drain valve (30-1); Heat exchanger automatic cleaning device comprising a. The method of claim 1, As the high pressure gas passes through the drain valve 30-1 and is supplied to the cooling water in the heat exchanger, bubbling generated in the cooling water changes the flow of the cooling water into a turbulent flow. Device.

Images