KR19980060531U - Automatic Condensate Discharge Device of Condensate Tank - Google Patents

Abstract

The present invention relates to a condensate automatic discharge device of the condensate tank, in particular, the electric valve (26, 30) which is controlled by the controller 40 in front and rear of the condensate tank (15) while penetrating through the male water tank (15) The main line 8 is installed; The bypass line 10 is connected to the main line 8 so that both ends are located at the front and rear sides of the electric valves 26 and 30, respectively, while the electric valve 25 is opened and closed by the controller 40 at the stop portion. )and; A vent valve 28 installed above the condensate tank 15 to open and close according to the measured value of the pressure detector 29; A drain line 9-1 connected to a lower portion of the condensate tank 15 and having a flow rate detector 35 and a valve 36 connected to the controller 40 so as to be spaced up and down; An auxiliary condensate tank 27 connected to a lower portion of the drain line 9-1, and having level detectors 33 and 34 connected to the controller 40 on an inner circumferential surface of the drain line 9-1 and spaced apart from each other; A drain line 9-2 connected to a lower portion of the auxiliary condensate tank 27 and provided with a valve 37 connected to the controller 40 and a flow rate detector 38 spaced up and down; A drain line 7 connected to a drain line 9-1 between the flow rate detector 35 and the valve 36 at an upper end thereof and coupled to a trap 16 at a lower end thereof by a valve 47; One end is connected to the drain line 9-1 between the auxiliary condensate tank 27 and the valve 37, and is configured as a purge line 6 opened and closed by a purge valve 39 connected to the controller 40. It relates to a condensate automatic discharge device of the condensate tank, characterized in that.

Description

Automatic Condensate Discharge Device of Condensate Tank

The present invention relates to a condensate automatic discharge device of the condensate tank, in particular, the auxiliary condensate tank is connected to the drain line of the condensate tank, the condensate in the auxiliary condensate tank is automatically discharged by the detection of the level gauge, the clogging of the drain line As it is detected by the detector and automatically penetrated by the purge gas, it is possible to prevent the malfunction of peripheral devices due to the overflow of condensate, to prevent environmental pollution, and to automatically discharge the condensate tank of the condensate tank to prevent safety accidents. It is about.

In general, as shown in FIG. 1, atmospheric air is sucked through the suction pipe 11 and compressed at a high temperature and high pressure in the compressor 12. The pulverized coal of the pulverized coal tank 19 is blast furnace 24 by high temperature and high pressure air. Will be moved to).

At this time, the air compressed at high temperature and high pressure in the compressor 12 is cooled in the after cooler, and condensate generated therein is separated from the condensate tank 15 and discharged to the outside through the trap 16.

However, when the trap 16 is clogged, condensate is not discharged smoothly, so that the condensate level of the condensate tank 15 rises, and eventually a large amount of condensate overflows the condensate tank and penetrates the instrument and equipment, resulting in rusting, breakage, and malfunction. Done.

In addition, the air containing a large amount of moisture causes clogging of the tuyere lance 44-1 mounted on the furnace tuft in the process of transferring the pulverized coal, causing variation in the amount of pulverized coal blown, thereby making the circumferential balance of the blast furnace unstable. As the molten coal temperature is reduced due to the reduced amount of pulverized coal, the delay of the melt discharge and the production amount are reduced. Furthermore, foreign matter is attached to the tip end portion 44 of the tuyere lance, which causes a large accident such as the tufts of tufts. And there is a problem of increased work load and safety accidents due to the lance penetrating operation.

In order to prevent such a problem, conventionally, when the trap 16 is clogged by foreign matter, the manual valve 16-1 is opened every time the operator checks and the condensed water is discharged to carry out the trap work.

At this time, by opening / closing the manual valve 16-1 every inspection, the worker's work load is increased, and safety accidents occur when the high temperature and high pressure air is suddenly discharged during the penetration of the trap 16, and the manual valve is opened when the trap is broken. If it is late, problems such as noise pollution, facility pollution, environmental pollution, and loss of compressed air due to condensate splashing occur.

The present invention is the secondary condensate tank is connected to the drain line of the condensate tank, the condensate in the secondary condensate tank is automatically discharged by the detection of the level gauge, the blockage of the drain line is automatically penetrated by the purge gas as detected by the flow rate detector The purpose of the present invention is to provide a device for automatically discharging condensate from a condensate tank, which prevents a malfunction of a peripheral device due to overflow of condensate, prevents environmental pollution, and prevents a safety accident.

1 is a schematic view showing a pulverized coal transport apparatus for a furnace equipped with a conventional condensate tank;

Figure 2 is a schematic diagram showing an automatic condensate discharge device of the condensate tank according to the present invention,

Figure 3 is a schematic diagram showing the flow rate detector in the automatic condensate discharge device of the condensate tank according to the present invention,

Figure 4 is a flow chart showing the operation sequence of the automatic condensate discharge device of the condensate tank according to the present invention.

* Description of the symbols used in the main parts of the drawings *

6: Purge line 7: Drain line 8: Main line 9-1, 9-2: Drain line 10: Bypass line 11: Suction line 12: Compressor 14: After cooler 15: Condensate tank 16: Trap 17: Air dryer 18: Air tank 19: Pulverized coal tank 20: Pickup 21: Three-way 22: Distribution valve 23: Blower pipe 24: Furnace 25, 26: Electric valve 27: Auxiliary condensate tank 28: Vent valve 29: Pressure detector 31, 32: Check valve 33 34: level gauge 35: flow rate detector 36,37: drain valve 38: flow rate detector 39: purge valve 40: controller 41: local panel 42: central cab 44: air vent fish lance 45: transmitter 46: orifice 47: drain valve

A main line through which the electric valves are respectively installed at the front and rear sides of the condensate tank and controlled by a controller to penetrate the water storage tank to achieve the above object; A bypass line which is connected to the main line so that both ends thereof are located at the front and rear sides of the electric valve while the electric valve opened and closed by the controller is installed at the stop part; A vent valve installed at an upper portion of the condensate tank to open and close according to a measurement of a pressure detector; A drain line connected to a lower portion of the condensate tank and connected to a controller so that a valve is spaced up and down; An auxiliary condensate tank connected to a lower portion of the drain line and having a level detector connected to a controller on an inner circumferential surface of the auxiliary line; A drain line connected to a lower portion of the auxiliary condensate tank and having a valve connected to a controller and a flow rate detector spaced up and down; A drain line connected to a drain line between the upper end of the flow detector and the valve and coupled to the lower end by a valve; One end is connected to the drain line between the auxiliary condensate tank and the valve, and provides a condensate automatic discharge device of the condensate tank, characterized in that composed of a purge line opened and closed by a purge valve connected to the controller.

The configuration of the present invention will be described with reference to the drawings.

2 is a schematic view showing a condensate automatic discharge device of the condensate tank according to the present invention, Figure 3 is a schematic view showing a flow rate detector in the condensate automatic discharge device of the condensate tank according to the present invention, Figure 4 It is a flowchart showing the operation sequence of the automatic condensate discharge device of the condensate tank according to.

First, the main line transfer valves 26 and 30 are installed in the main line 8 that passes through the condensate tank 15 and transfers the cooling air of the aftercooler 14 from left to right. have.

In addition, the bypass line (10), in which the electric valve 25 is installed at the stop, is connected to the main line 8 so that the left end is located at the left side of the electric valve 26, and the right end is electric The main line 8 is connected to the right side of the valve 30.

Therefore, when the blockage of the drain lines 9-1 and 9-2 is detected by the flow rate detectors 35 and 38, the electric valves 26 and 30 are closed and the electric valve 25 is opened. At this time, the aftercooler 14 Cooling air of) is directly transferred to the air dryer 17 through the bypass line (10).

In addition, a vent valve 28 and a pressure detector 29 controlled by the controller 40 are installed in the upper portion of the condensate tank 15, and a drain line 9-1 is vertically disposed in the lower portion of the condensate tank 15. It is connected.

At this time, the flow rate detector 25 and the drain valve 36 connected to the controller 40 are installed in the drain line 9-1 up and down, and the auxiliary condensate tank 27 at the lower end of the drain line 9-1. Is connected.

Here, the auxiliary condensate tank 27 has level detectors 33 and 34 controlled by the controller 40 on the inner circumferential surface up and down, and a drain line 9-2 is connected to the lower portion thereof.

A drain valve 37 and a flow rate detector 38 connected to the controller 40 are provided in the drain line 9-2 up and down, and the drain line 9-2 in the upper side of the drain valve 37 is provided. A purge line 6 is connected, and a purge valve 39 controlled by the controller 40 is installed in the purge line.

Here, the flow rate detectors 35 and 38 detect the flow rate of the condensate passing through the orifice 46 by the transmitter 45 and send it to the controller 40. When the condensate passes through the orifice normally, the transmitter 45 While F2 is detected, when the drain lines 9-1 and 9-2 are blocked, the amount of condensed water passing through the orifice 46 is reduced, so that F1 is detected by the transmitter 45.

In addition, the drain line 7, in which the drain valve 47 controlled by the controller 40 is installed, has an upper end connected to the drain line 9-1 between the flow rate detector 35 and the drain valve 36. The trap 16 is coupled to the bottom.

On the other hand, the controller 40 is connected to the local panel 41 and the central cab 42, respectively, the central cab 42 can be selected as auto or desk, the local panel 41 installed in the field desk Driving is possible.

Hereinafter will be described the operation of the present invention.

In the central cab 42, it can be selected automatically or manually from the control screen, and if it is selected automatically, it can be selected by the sequence, but in the case of manual, it can be selected as the main line or the auxiliary line. If the local panel 41 is selected like the desk operation, the sequence is progressed by the controller 40 alone.

Therefore, when the condensate in the auxiliary condensate tank 27 is detected by the high level detector 33 or when the discharge time elapses for 2 hours, the drain valve 37 is automatically opened and the condensed water in the auxiliary condensate tank 27 is condensed in the tank 15. The drain valve 37 is automatically closed when the high pressure air is discharged and the condensate in the auxiliary condensate tank is detected by the low level detector 34.

When the flow rate F1 is detected by the flow rate detectors 35 and 38 while discharging the condensate into the drain line, it is determined that the drain line is blocked and the drain valve 37 of the open drain valves 36 and 37 is closed, and the bypass electric valve 25 At the same time the main line motor valves 26 and 30 are closed and the air flow is changed, the vent valve 28 is opened to discharge the air pressure to the atmosphere.

In addition, when the pressure is detected by the pressure detector 29, the purge air valve 39 is opened and high pressure air flows in, and the high pressure air is moved upward to pass through the drain valve 36 through the auxiliary condensate tank 27. When the flow rate F2 is detected by the flow rate detector 35, it is determined that the drain valve 36 has passed.

On the other hand, when the flow rate F2 is detected in the flow rate detector 35, the drain valve 36 is closed and at the same time the drain valve 37 is opened so that the high pressure air flowing through the purge valve 39 passes through the drain valve 37. Thus, when the flow rate F2 is detected by the flow rate detector 38, it is determined that the drain valve 37 has passed.

When F2 is sequentially detected by the flow rate detectors 35 and 38, the purge air valve 39 and the vent valve 28 are closed, and the main line motor valves 26 and 30 are opened to open the air of the aftercooler 14. It flows into (15), and at the same time the bypass electric valve 25 is closed.

In addition, when the drain valve 36 opens, the condensed water in the auxiliary condensate tank 27 is discharged through the drain valve 37 by the pressure of air, and when the condensed water in the auxiliary condensate tank is detected by the low level detector 34, the drain is automatically drained. The valve 37 is closed.

On the other hand, even if the condensate in the auxiliary condensate tank 27 is detected by the high level detector 33 and the discharge time elapses for 2 hours, if the flow rate is not detected by the flow rate detectors 35 and 38, the drain valve 36 is automatically closed. The drain valve 47 is opened, and when the constant pressure is reached, the condensed water is discharged by the trap 16, thereby completing all sequences.

The present invention reduces the work load, prevents the loss of the tuyere due to poor blown state, and increases productivity by preventing the lowering of the temperature of the furnace due to the instability of the circumferential balance of the blast furnace and the reduced amount of pulverized coal. Preventing the level rise of the tank prevents damage to instruments, equipment, and malfunctions, and provides the effect of preventing equipment pollution and environmental pollution due to scattering of condensate.

Claims (1)

A main line 8 penetrating through the water storage tank 15 and having electric valves 26 and 30 respectively installed at front and rear sides of the condensate tank 15 and controlled by the controller 40; The bypass line 10 is connected to the main line 8 so that both ends are located at the front and rear sides of the electric valves 26 and 30, respectively, while the electric valve 25 is opened and closed by the controller 40 at the stop portion. )and; A vent valve 28 installed above the condensate tank 15 to open and close according to the measured value of the pressure detector 29; A drain line 9-1 connected to a lower portion of the condensate tank 15 and having a flow rate detector 35 and a valve 36 connected to the controller 40 so as to be spaced up and down; An auxiliary condensate tank 27 connected to a lower portion of the drain line 9-1, and having level detectors 33 and 34 connected to the controller 40 on an inner circumferential surface of the drain line 9-1 and spaced apart from each other; A drain line 9-2 connected to a lower portion of the auxiliary condensate tank 27 and provided with a valve 37 connected to the controller 40 and a flow rate detector 38 spaced up and down; A drain line 7 connected to a drain line 9-1 between the flow rate detector 35 and the valve 36 at an upper end thereof and coupled to a trap 16 at a lower end thereof by a valve 47; One end is connected to the drain line 9-1 between the auxiliary condensate tank 27 and the valve 37, and is configured as a purge line 6 opened and closed by a purge valve 39 connected to the controller 40. Automatic condensate discharge device of the condensate tank, characterized in that.