KR102582269B1 - The condensated water feeder of the steam boiler - Google Patents

Abstract

The present invention relates to a steam boiler that heats water to generate high-pressure steam and supplies it to a heat exchanger. The entire amount of high-temperature, high-pressure condensate and steam generated by heat exchange in the heat exchanger can be recovered in a short period of time and stably supplied to the boiler. It was made to be so.
To this end, the present invention installs two or more pumps so that condensate and steam can be recovered and supplied to the boiler with one device even if the pressures of the high-temperature condensate and steam generated by heat exchange in the heat exchanger are different, and the pump In the process of simultaneously recovering condensate and steam using the pumping pressure generated by the operation of the pump, even if one pump breaks down, the condensate and steam generated through heat exchange are continuously recovered and supplied to the boiler, reducing the cost of boiler operation. Significant savings can be achieved.

Description

{The condensated water feeder of the steam boiler}

The present invention relates to a steam boiler that heats water to generate high-pressure steam and supplies it to a heat exchanger. More specifically, the entire amount of high-temperature and high-pressure condensate and steam generated by heat exchange in the heat exchanger is recovered in a short period of time. This relates to a steam boiler condensate supply device that stably supplies water to the boiler.

In general, high-pressure steam obtained by heating water is widely used in various fields such as indoor heating, laundries, sewing factories, and kitchens, and such steam is usually obtained by a steam boiler.

The present invention improves the problems of the boiler condensate supply device developed by the inventor and registered as Patent No. 2312086 (registered on October 6, 2021).

Figure 1 is a configuration diagram showing a conventional device, Patent No. 2312086, in which the upper and lower tanks 50 and 51 are installed to communicate with at least one first connection pipe 52, and the lower tank 51 A pump 55 is connected to the discharge side to pump condensate 54 according to the driving of the motor 53.

An air bubble inflow prevention plate 56 having a plurality of through holes 56a is further installed on the discharge side of the lower tank 51 to pump condensate 54 in the lower tank 51 to the low water level by driving the pump 55. Even when pumping, a portion of the gas (steam) in the lower tank 51 is prevented from flowing into the pump 55 due to the eddy phenomenon, thereby preventing cavitation damage to the pump 55.

In addition, a condensate water circulation pipe 58 equipped with a first ejector 57 is installed on the discharge side of the pump 55, and the discharge portion is located within the upper tank 50. 1 A condensate water recovery pipe 59 is installed on one side of the ejector 57 to recover the condensate 54.

A suction control valve 60 is installed in the condensate recovery pipe 59 to control the recovery amount of condensate 54, and a first check valve is installed on one side of the suction control valve 60 to prevent the recovered condensate from flowing back. (61) and a filter (62) to filter out foreign substances in the condensate are installed in that order.

A second connection pipe 64 that supplies condensate or steam to the boiler is connected to the upper tank 50, and the second connection pipe 64 is connected to the second connection pipe 64 to prevent condensate supplied to the boiler from flowing back toward the upper tank 50. A second check valve 63 is installed.

The condensate water ( One end of the condensate water supply pipe 66 that supplies 54) to the boiler (not shown) is fixed to be open, and a second connection pipe 64 is connected to the other end of the condensate water supply pipe 66. Their connection points A second ejector 67 is installed to lower the pressure of the condensate 54 as it passes through the condensate supply pipe 66, thereby allowing the condensate water or steam in the upper tank 50 to be supplied to the boiler.

A condensate discharge blocking plate 68 is further installed on the discharge side of the upper tank 50.

In addition, before operating the device of the present invention in the upper tank 50, there is an air discharge valve 69 that discharges the air in the upper tank 50 to the outside to prevent cavitation phenomenon in the pump 55. It is provided.

A water level sensor 70 is installed in the upper and lower tanks 50 and 51 to detect the amount of condensate 54. As the water level sensor 70 detects the amount of condensate 54, the control unit (71) is configured to control the driving of the motor 55 or the electric valve 65.

The water level sensor 70 is equipped with an electric valve-on sensor 70a located in the upper tank 50, and an electric valve-off sensor 70b is installed in the lower tank 51, and the electric valve-off sensor ( On and off sensors 70c and 70d that control the driving of the motor 53 are sequentially installed at the lower part of 70b).

Therefore, when power is applied, the air discharge valve 69 is opened before the motor 53 is driven to discharge the air remaining in the upper tank 50 to the outside, thereby preventing the phenomenon of cavitation occurring when the pump 55 is driven. It can be prevented in advance.

In this state, when the motor 53 drives the pump 55 connected to the coupling 73, the first ejector (54) is pumped through the condensate circulation pipe 58. As the pressure of the condensate 54 drops as it passes through 57), the condensate generated while passing through the heat exchanger is recovered through the condensate water recovery pipe 59, which is connected to the first ejector 57. Since it is connected, the recovered condensate is returned to the upper tank (50) through the condensate circulation pipe (58).

At this time, the condensate 54 in the upper tank 50 is located below the electric valve-on sensor 70a, so the electric valve 65 installed in the condensate water supply pipe 66 remains closed and the condensate 54 in the lower tank 51 is maintained. Since the condensate 54 passes through the hole 56a of the air bubble inflow prevention plate 56, air is prevented from flowing into the pump 55.

As the pump 55 continues to operate, the condensate 54 in the upper and lower tanks 50 and 51 circulates through the condensate circulation pipe 58, and the condensate is recovered through the condensate return pipe 59 to return to the upper tank 50. ), the control unit 71 detects this and opens the electric valve 65 installed in the condensate supply pipe 66, so the condensate pumped by the pump 55 ( As described above, part of the condensate is recovered by dropping the pressure of the condensate while passing through the first ejector 57 installed in the condensate circulation pipe 58, and some of the condensate is returned to the boiler through the condensate supply pipe 66. supplied.

As the electric valve 65 is opened and the condensate 54 in the lower tank 51 is supplied to the boiler, the pressure in the upper tank 50 decreases, so the condensate 54 generated in the heat exchanger flows into the condensate recovery pipe ( 59), more is recovered into the upper tank 50. At this time, foreign substances contained in the condensate 54 are not only filtered out by the filter 62 installed in the condensate water recovery pipe 59, but the recovered condensate is also removed. 1 Backflow phenomenon is prevented by the check valve (61).

In the same operation as described above, the pump 55 of the same capacity is driven to recover a larger amount of condensate 54 in the same time, and once the upper tank 50 is filled with condensate 54, the condensate 54 is When supplied to the boiler through the supply pipe 66, a second check valve 63 is installed on the second connection pipe 64, so that the pressure of the condensate drops as it passes through the second ejector 67, so the upper tank ( The condensate 54 recovered inside the 50) is supplied to the boiler through the second connection pipe 64, and thus a larger amount of condensate can be recovered and supplied to the boiler in the same time.

However, when the condensate in the lower tank (51) is supplied to the boiler by driving the pump (55), the amount of condensate returned to the condensate recovery pipe (59) decreases, and the level of condensate in the upper and lower tanks (50) and (51) decreases. When the electric valve off sensor (70b) in the lower tank (51) is reached, the control unit (71) detects this and automatically closes the electric valve (65), so the operation of supplying condensate through the condensate supply pipe (66) is temporarily suspended. In one state, the pump 55 circulates condensate through the condensate circulation pipe 58 and recovers the condensate through the condensate return pipe 59.

When the condensate recovered by the continued operation of the pump 55 reaches the electric valve-on sensor 70a located in the upper tank 50, the control unit 71 opens the electric valve 65 again as described above. Condensate can be supplied to the boiler through the condensate supply pipe 66.

Republic of Korea Patent Publication No. 10-613397 (registered on August 9, 2006) Republic of Korea Patent Publication No. 10-1141438 (registered on April 23, 2012) Republic of Korea Patent Publication No. 10-2312086 (registered on October 6, 2021)

However, in this conventional device, when some of the condensate circulating inside the upper and lower tanks is supplied to the boiler, the pressure of the condensate drops as the condensate passes through the second ejector, thereby simultaneously supplying condensate water and steam in the upper tank, thereby providing the same capacity. Even if a pump is used, the effect of supplying condensate to the boiler at high pressure can be expected, but recovering condensate using only one pump caused several problems as follows.

First, although several heat exchangers using steam with different pressures (8.4 bar, 9.5 bar, 10.2 bar, etc.) are installed in the factory, the condensate and As steam is recovered simultaneously, the recovery efficiency of condensate and steam decreases.

Second, if the pump suddenly breaks down in the process of recovering condensate and steam using a pump, the condensate and steam cannot be recovered.

Third, as the pump is continuously operated to recover condensate and steam and supply it to the boiler, the lifespan of the expensive pump is shortened.

Fourth, as a horizontal pump was installed on the die and the upper and lower tanks were installed on it, the upper and lower tanks had to be separated from the pump in order to maintain or replace the pump, making maintenance work cumbersome.

The present invention was devised to solve this conventional problem, and by installing two or more pumps, even if the pressures of high-temperature condensate and steam generated by heat exchange in the heat exchanger are different, it is possible to use one device. The purpose is to recover them at the same time and supply them to the boiler.

Another object of the present invention is to continuously recover condensate and steam generated by heat exchange and supply them to the boiler even if one pump fails in the process of simultaneously recovering condensate and steam using the pumping pressure generated by driving the pump. It's in doing it.

Another object of the present invention is to extend the life of an expensive pump by intermittently operating a plurality of pumps to recover condensate and steam generated in the heat exchanger.

Another purpose of the present invention is to facilitate pump maintenance work by applying a pump that generates pumping pressure by driving a motor as a vertical pump.

According to an aspect of the present invention for achieving the above object, the condensate water recovery member is connected to the first vertical pipe and the second vertical pipe, and the first and second vertical pipes are connected so that the upper and lower parts of the first and second vertical pipes communicate to form a closed space. It is composed of a communication pipe, and the first communication pipe is divided by a partition so that the lower part of the second vertical pipe is partitioned, and on one side of the die where the condensate recovery member is installed, first and second vertical pumps are driven by first and second motors, respectively. are installed to connect the first and second suction pipes to both sides of the first and second vertical pumps and the first communication pipe, respectively, and one end is fixed to the discharge side of the first and second vertical pumps, and the other end is attached to the second vertical pipe. First and second pressurized pipes are installed inside, and an ejector to which a condensate recovery pipe is connected to the first and second pressurized pipes is installed, and a "U" is installed at the top of the first and second vertical pipes and inside the second communication pipe. A condensate supply device for a steam boiler is provided, which is characterized by installing a condensate discharge pipe in the shape of a square.

The present invention has several advantages over conventional devices, as follows.

First, since two pumps are installed, even if the high-temperature condensate and steam generated by heat exchange in the heat exchanger have different pressures, they can be simultaneously recovered and supplied to the boiler using one device.

Second, in the process of simultaneously recovering condensate and steam using the pumping pressure generated by the operation of the pump, even if one pump fails, the condensate can be pumped using another pump, so the condensate and steam generated through heat exchange can be pumped. can be continuously recovered and supplied to the boiler.

Third, it is possible to recover condensate and steam generated in the heat exchanger by intermittently operating a plurality of pumps, thereby extending the life of the expensive pump.

Fourth, as the pump that generates pumping pressure by driving the motor is applied as a vertical pump, there is no need to separate the condensate recovery member from the die, making maintenance of the pump easier.

Figure 1 is a configuration diagram showing a conventional device, Patent No. 2312086.
Figure 2 is a longitudinal cross-sectional view showing an embodiment of the present invention.
Figure 3 is a plan view of Figure 2
Figure 4 is a cross-sectional view taken along line A-A of Figure 2
Figure 5 is an enlarged view showing the installation state of the ejector in the present invention
Figure 6 is a plan view showing the vortex prevention plate of the present invention
7 is a longitudinal cross-sectional view showing another embodiment of the present invention.
Figure 8 is a plan view of Figure 7
Figure 9 is a cross-sectional view taken along line B-B of Figure 7
Figure 10 is a longitudinal cross-sectional view showing another embodiment of the present invention.
Figure 11 is a plan view of Figure 10
Figure 12 is a cross-sectional view taken along line C-C of Figure 10

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in many different forms and is not limited to the embodiments described herein. Please note that the drawings are schematic and not drawn to scale. The relative dimensions and proportions of parts in the drawings are shown exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are illustrative only and are not limiting. And for identical structures, elements, or parts that appear in two or more drawings, the same reference numerals are used to indicate similar features.

FIG. 2 is a longitudinal cross-sectional view showing an embodiment of the present invention, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a cross-sectional view taken along line A - A of FIG. 2. The present invention is a heat exchanger (not shown) in a heat exchanger (not shown). The condensate compression member 100, which recovers and compresses the generated high-temperature, high-pressure condensate and vapor, connects the first and second vertical pipes 101 and 102 and the upper and lower ends of the first and second vertical pipes to form a closed space. It is composed of first and second communication pipes 103 and 104 to form and is fixedly installed on the upper surface of the die 110.

Inside the first communication pipe 103, which is installed so that the lower ends of the first and second vertical pipes 101 and 102 communicate with each other, there is a partition 105 that divides the inside of the condensate compression member 100 into half. It is installed vertically as shown in Figures 2 to 4.

This is the pumping pressure when the first and second vertical pumps 121 and 122, which will be described later, are driven by the first and second motors 123 and 124, respectively, to pump the condensate inside the condensate compression member 100. This is to ensure that it works evenly.

In one embodiment of the present invention, the condensate compression member 100 is constructed by welding the first and second vertical pipes 101 and 102 and the first and second communication pipes 103 and 104, but mass production of these is possible. It is understandable that it can be manufactured integrally using a mold.

At this time, the diameter of the first and second vertical pipes (101) (102) and the first and second communication pipes (103) (104) are set to 150 mm or less to manufacture the condensate compression member (100), making it possible to use the pressure vessel. It has the advantage of avoiding difficult regulations.

A water level sensor 130 that detects the amount of condensate is installed inside the first vertical pipe 101. As the water level sensor 130 detects the amount of condensate by a set amount, the control unit 140 It is designed to control the driving of the first and second motors 123 and 124.

First and second vertical pumps 121 and 122 that pump condensate according to the driving of the first and second motors 123 and 124 on the upper surface of the die 110 are connected to the condensate compression member 100. are installed on one side of each, and first and second suction pipes 125 and 126 are connected to one side of each of the first and second vertical pumps 121 and 122 and the second vertical pipe 102, respectively. First and second pressure pipes 127 and 128 are installed to extend on the discharge side of the first and second vertical motors 121 and 122 and inside the second vertical pipe 102, respectively, as shown in FIG. 3. .

The capacities of the first and second motors 123 and 124 and the first and second vertical pumps 121 and 122 applied to the present invention may be the same, but may be applied with different capacities as needed. .

This is because when the difference in pressure between condensate and steam generated by heat exchange is small, the same capacity can work, but when the pressure difference between condensate and steam is large, motors and pumps with different capacities must be used. .

The first and second pressure pipes 127 and 128 installed to extend to the inside of the second vertical pipe 102 are connected to one condensate discharge pipe 151 to discharge the condensate, as shown in an embodiment of the present invention. An ejector 152 is installed in the pipe 151, and a condensate recovery pipe 153 for recovering high-temperature, high-pressure condensate and steam generated from the heat exchanger is connected to one side of the ejector 152, and the ejector 152 ) is connected to the outlet side of the diffuser (154) that discharges condensate and steam into the interior of the condensate compression member (100).

At this time, the first check valve 157 is installed in the condensate recovery pipe 153 to prevent the recovered condensate and steam from flowing back to the smoke exchanger.

In one embodiment of the present invention, the condensate discharge pipe 151, which discharges condensate to the ejector 152, is connected to the first and second pressurization pipes 127 and 128 at the same time, so that the condensate is discharged to the diffuser 154. , as shown in FIGS. 7 to 9 shown in another embodiment, the condensate discharge pipe 151 is connected to the first and second pressurizing pipes 127 and 128, respectively, and pumped by the first and second vertical pumps 121 and 122. As the condensate passes through each ejector 152 through each condensate discharge pipe 151, condensate and steam having different pressures are recovered through different condensate recovery pipes 153, and the condensate is discharged through each diffuser 154. It is understandable that it may be configured to be recovered inside the recovery member 100.

Accordingly, high-temperature, high-pressure condensate and steam generated in a heat exchanger using steam at different pressures (e.g., 8.4 bar, 9.5 bar, 10.2 bar, etc.) can be recovered using one device and supplied to the boiler. Groundbreaking effects can be expected.

However, the present invention can be configured as another embodiment shown in FIGS. 10 to 12 to recover high temperature and high pressure condensate and steam generated in a heat exchanger using steam of different pressures using one device. It is understandable.

That is, the pressure of the condensate compressed by driving the first and second vertical pumps 121 and 122 and pumped into the interior of the second vertical pipe 102 through the first and second pressure pipes 127 and 128 is uniform. A pressure equalization pipe 155 is installed inside the second vertical pipe 102 so that 153), the pressure equalization pipe 155 and each ejector 152 are connected to each other by a condensate discharge pipe 151.

At this time, a ventilation pipe 156 is installed through the center of the pressure equalization pipe 155 to maintain the upper and lower pressures of the pressure equalization pipe 155 the same.

In addition, as the first and second vertical pumps 121 and 122 pump condensate by driving the first and second motors 123 and 124 on the upper part of the first vertical pipe 101, the condensate water flows into the first and second vertical pipes 101. 2 A vortex prevention plate (106) is installed to prevent vortexes from being generated when being sucked into the pumps (121) (122).

In one embodiment of the present invention, a through hole 106a through which the water level sensor 130 passes is formed in the center of the vortex prevention plate 106 as shown in FIG. 6, and a plurality of radially cut portions 106b are formed along the back. Although it is shown as a shape formed at intervals, it is understandable that the shape can be applied in various forms by experts in the field as needed.

In addition, a condensate discharge pipe 107 is installed at the top of the first and second vertical pipes 101 and 102 and inside the second communication pipe 104, and the condensate discharge pipe 107 is connected to the first and second vertical pipes. It is installed in a "U" shape through the upper part of (101) (102) and the second communication pipe 104, so that the inlet of the condensate discharge pipe 107 is located at the upper part of the first vertical pipe 101, and the discharge port is exposed to the outside of the second vertical pipe 102.

At the end of the condensate discharge pipe 107 exposed to the outside of the second vertical pipe 102, a second check valve 161, an air discharge valve 162, and a condensate discharge valve 163 are sequentially installed to discharge condensate to the boiler. It can be supplied to the side.

In the drawing, reference numeral 170 is a drain valve that discharges condensate in the condensate compression member 100 to the outside for repair purposes.

In the present invention, as one motor is driven by the application of power to operate one pump, the condensate inside the condensate compression member 100 flows into the pump and is rapidly discharged through the ejector 152 connected to the discharge side of the pump. Since it passes at high speed, the operation of recovering the high-temperature, high-pressure condensate and steam generated in the heat exchanger to the condensate recovery member 100 is described in detail in the gazette developed by the inventor and registered as Patent No. 2312086, so a detailed description thereof is provided. will be omitted.

Therefore, when the first and second vertical pumps 121 and 122 are driven by the first and second motors 123 and 124, respectively, to pump the condensate inside the condensate compression member 100, the first and second vertical pipes ( The first communication pipe 103 communicating with the lower part of 101)(102) is bisected by the partition wall 105, so that the first and second condensate are sucked in according to the capacities of the first and second vertical pumps 121 and 122, respectively. It is pumped by suction through pipes 125 and 126.

As described above, when the first and second vertical pumps 121 and 122 pump condensate, a vortex prevention plate 106 is installed inside the first vertical pipe 101 constituting the condensate compression member 100. Since eddy currents are not generated, cavitation phenomenon occurring inside the first and second vertical pumps (121 and 122) is prevented in advance, and thus the impellers of the first and second vertical pumps (121 and 122) are It has the advantage of extending lifespan.

In addition, when the first and second vertical pumps 121 and 122 are driven to pump condensate in the condensate compression member 100, a partition wall 105 divides the lower part of the first communication pipe 103 into 1/2 and Therefore, it is possible to obtain the advantage of maintaining uniform pumping pressure of the condensate transported through the first and second pressurization pipes 127 and 128.

By driving the first and second vertical pumps 121 and 122, the condensate in the condensate compression member 100 is pumped and passes through the ejector 152 through the first and second pressure pipes 127 and 128, thereby increasing the pressure. When it falls into a vacuum state, the high-temperature, high-pressure condensate and steam generated by heat exchange in the heat exchanger are recovered through the condensate recovery pipe 153 and discharged to the diffuser 154, making recovery of high-temperature, high-pressure condensate and steam possible. do.

That is, in Figures 7 to 9 shown as another embodiment of the present invention, when the condensate water pumped through each of the first and second pressure pipes 127 and 128 passes through the ejector 152 and drops the pressure to a vacuum state, each High-temperature, high-pressure condensate and steam generated in the heat exchanger are recovered through the condensate recovery pipe 153 and discharged to the diffuser 154.

In addition, in FIGS. 10 and 12 shown as another embodiment, the condensate pumped through the first and second pressure pipes 127 and 128 maintains the same pressure in the equalization pipe 155 and then flows through the condensate discharge pipe 151. As it passes through each ejector 152 at high speed, the pressure drops to a vacuum state, so that the condensate can be recovered to each ejector 152 through each condensate recovery pipe 153.

In this way, the high-temperature, high-pressure steam recovered inside the condensate recovery member 100 is converted into condensate, and thus, along with the recovered condensate, it is stored in the upper part of the first and second vertical pipes 101 and 102 and the second extension pipe 104. Condensate can be supplied to the boiler through the “U” shaped condensate discharge pipe 107 installed inside.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that it can be implemented in other specific forms without changing the technical idea or essential features. will be.

Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive, and the scope of the present invention described in the detailed description is indicated by the claims described later, and the meaning and scope of the claims. The scope and all changes or modified forms derived from the equivalent concept should be construed as being included in the scope of the present invention.

100: condensate compression member 101, 102: first and second vertical pipes
103, 104: first and second communication pipes 105: partition wall
106: Vortex prevention plate 107: Condensate discharge pipe
110: die 121, 122: first and second vertical pumps
123, 124: 1st and 2nd motors 125, 126: 1st and 2nd suction pipes
127, 128: first and second pressurization pipes 151: condensate discharge pipe
152: Ejector 153: Condensate recovery pipe
154: diffuser 155: pressure equalization pipe

Claims (3)

The condensate recovery member 100 is connected to the first vertical pipe 101 and the second vertical pipe 102, and the upper and lower parts of the first and second vertical pipes 101 and 102 are connected to form a closed space. , It is composed of two communication pipes (103) and (104), and the first communication pipe (103) is partitioned by a partition wall (105) so that the lower part of the second vertical pipe (102) is partitioned, and the die on which the condensate recovery member (100) is installed. On one side of (110), first and second vertical pumps 121 and 122 driven by first and second motors 123 and 124, respectively, are installed to form the first and second vertical pumps 121 and 122. ) and the first and second suction pipes 125 and 126 are respectively connected to both sides of the first communication pipe 103, and one end is fixed to the discharge side of the first and second vertical pumps 121 and 122, respectively, and the other end The first and second pressurization pipes 127 and 128 are installed inside the second vertical pipe 102, and the condensate recovery pipe 153 is connected to the first and second pressurization pipes 127 and 128. An ejector 152 is installed, and a "U"-shaped condensate discharge pipe 107 is installed at the top of the first and second vertical pipes 101 and 102 and inside the second communication pipe 104. Condensate supply device for steam boiler In claim 1,
Ejectors 152 are installed on the condensate discharge pipes 151 fixed to the first and second pressurization pipes 127 and 128, respectively, and condensate recovery pipes 153 are connected to each ejector 152. A condensate supply device for a steam boiler. In claim 1,
A pressure equalization pipe 155 is installed in the second vertical pipe 102 so that the first and second pressure pipes 127 and 128 are connected, and each condensate recovery pipe 153 is connected to the equalization pipe 155. A condensate water supply device for a steam boiler, characterized in that (152) is connected to a condensate discharge pipe (151).