JP2018183539A - Drainage water utilization system for business laundry machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage water utilization system for business laundry machine capable of suppressing fuel cost and capable of facilitating cleaning.SOLUTION: A drainage water utilization system for business laundry machine includes: a drainage water receiving tank 2 for receiving washing drainage water; a drainage water supply passage 3 for supplying the washing drainage water to the drainage water receiving tank 2; a drainage water passage 6 for draining the washing drainage water received in the drainage water receiving tank 2 to the outside from a drain port 8; a pump 11 for draining for draining the washing drainage water in the drainage water receiving tank 2 via the drainage water passage 6; a new water supply passage 15 including a new water receiving port 16 and a new water supply port 7, and for supplying new water to the business laundry machine; and a plurality of pieces of shell and tube type heat exchangers 20 for exchanging heat between the washing drainage water and the new water. The shells of the shell and tube type heat exchangers 20 are arranged in the middle of the new water supply passage 15, and the tubes of the shell and tube type heat exchangers 20 are arranged in the middle of the drainage water passage 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wastewater utilization system for a commercial washing machine, and more particularly, a business characterized by heating fresh water supplied to a washing tub using laundry wastewater drained from a commercial laundry machine The present invention relates to a wastewater use system for washing machines.

  In general, large-scale cleaning companies use a commercial large-sized washing machine in their own factories to wash a large amount of laundry at once. In a conventional commercial washing machine, each time washing is performed, fresh water used for washing is heated to a predetermined temperature using steam from the boiler, and then the heated fresh water is supplied to the washing tub. In many cases, the washing drainage is drained as it is after the washing.

  However, the method of heating fresh water used for washing to a predetermined temperature using steam from the boiler every time washing is performed can point out a problem that the fuel cost for driving the boiler increases. .

  In addition, it can be pointed out that the waste water treatment is costly when the waste water after washing is drained as it is. In other words, laundry wastewater is generally treated with activated sludge. However, if the temperature of the laundry wastewater is high, bacteria are adversely affected, and extra chemicals and bacteria nutrients and bacteria are added to the wastewater treatment. Cost of replenishment.

  Therefore, conventionally, a method of reusing washing wastewater and heating new water using a double pipe or a plate-type heat exchanger has been proposed.

JP 2006-097049 A JP 2012-239614 A JP 2010-210402 A

  However, it can be pointed out that when using a method using a double pipe or a plate-type heat exchanger, it is difficult to clean lint and scale (scale) contained in the waste water. .

  Accordingly, the present invention provides a wastewater utilization system for a commercial washing machine that can reduce fuel costs and enables easy cleaning by enabling warming of fresh water using laundry wastewater. The challenge is to do.

The wastewater utilization system for a commercial washing machine of the present invention is
A wastewater utilization system for a commercial washing machine,
A drainage receiving tank for receiving laundry wastewater from a commercial washing machine;
A drainage supply passage for supplying washing drainage to the drainage receiving tank;
A drainage channel for draining the washing wastewater received in the drainage receiving tank to the outside through the drainage port, provided with a drainage port on the tip side;
A drainage pump for draining the washing wastewater in the drainage receiving tank through the drainage channel;
A new water supply channel for supplying new water to a commercial washing machine, including a new water inlet and a new water supply port;
A plurality of shell and tube heat exchangers for exchanging heat between the washing waste water and the fresh water,
The shell of the shell & tube type heat exchanger is arranged on the way of the new water supply path,
The tube of the shell and tube type heat exchanger is arranged in the middle of the drainage channel.

  The wastewater utilization system for commercial washing machines of the present invention uses a shell and tube heat exchanger to heat fresh water using the heat of laundry wastewater, so that it is used for washing each time it is washed. Compared with a method in which fresh water to be heated is heated to a predetermined temperature using steam from the boiler, the cost for driving the boiler can be reduced.

  In addition, since the new water is heated using the heat of the laundry drainage using the shell and tube heat exchanger, the temperature of the laundry drainage can be lowered, and the laundry drainage after the washing is finished. Compared with the case of draining as it is, it is possible to reduce the cost of wastewater treatment. In other words, as mentioned above, if the temperature of laundry wastewater is high, it will adversely affect bacteria for activated sludge treatment, and there will be additional costs for wastewater treatment such as chemicals, bacteria nutrients, and supplementation of bacteria. In the present invention, since the temperature of the washing waste water is lowered by heat exchange with the fresh water and the adverse effect on the bacteria is suppressed, it is possible to reduce the extra cost for the waste water treatment.

  And at this time, in this invention, in order to let drainage pass to the tube of a shell & tube type heat exchanger, it can be disassembled and cleaned for every tube, and the lint and the scale contained in washing drainage are removed easily. It is possible.

It is a block diagram for demonstrating the structure of the Example of the wastewater utilization system of the business-use washing machine of this invention.

  The wastewater utilization system for a commercial washing machine of the present invention has a drainage receiving tank that receives the washing wastewater of the commercial washing machine, and a drainage supply passage for supplying the washing drainage into the drainage receiving tank. The supply path has a drainage receiving port connected to a washing tub of a commercial washing machine on the base end side, and a drainage supply port connected to the drainage receiving tank on the distal end side.

  Moreover, the wastewater utilization system of the industrial washing machine of the present invention has a drainage channel, and this drainage channel has a drainage port on the tip side, and drains the washing drainage received in the drainage receiving tank to the outside. Used for.

  Furthermore, the wastewater utilization system for a commercial washing machine according to the present invention has a drainage pump. By driving the drainage pump, the wastewater in the drainage receiving tank is drained through the drainage channel. It is supposed to drain from the mouth.

  Furthermore, the wastewater utilization system for a commercial washing machine of the present invention has a new water supply channel for supplying fresh water to the washing tub of the commercial laundry machine. The new water supply channel includes a new water receiving port for receiving new water and a new water supply port for supplying the received new water to a commercial washing machine.

  Moreover, in the wastewater utilization system for a commercial washing machine of the present invention, a shell and tube heat exchanger is provided as a heat exchanger for exchanging heat between washing wastewater and fresh water. A plurality of exchangers are connected and provided.

  In the wastewater utilization system for a commercial washing machine according to the present invention, the shell of the shell and tube type heat exchanger is arranged in the middle of the new water supply path, and the fresh water is put into service through the shell of the shell and tube type heat exchanger. It will be supplied to the washing machine.

  Furthermore, in the wastewater utilization system for a commercial washing machine according to the present invention, the tube of the shell and tube type heat exchanger is arranged in the middle of the drainage channel, and the washing wastewater is drained through the tube of the shell and tube type heat exchanger. It is said. In this way, in the shell and tube heat exchanger, heat is exchanged between the washing waste water and fresh water, the heat of the washing waste water is absorbed into the fresh water, and the temperature of the fresh water is raised and the temperature of the washing waste water is lowered. It is said.

  Here, a drainage valve is provided between the drainage port in the drainage channel and the shell & tube heat exchanger, and a drainage channel and a drainage receiving tank are provided between the drainage valve and the shell & tube type heat exchanger in the drainage channel. It is better to place a circulation path in communication and to provide a circulation valve in the circulation path, which normally drains the washing wastewater through the drain outlet by opening the drain valve and closing the circulation valve. By closing the drainage valve and opening the circulation valve, the laundry drainage can be circulated, so by putting the cleaning agent in the drainage receiving tank and circulating the laundry drainage, The drainage can be cleaned.

  In addition, the space between the fresh water inlet and the shell and tube heat exchanger in the new water supply channel and the space between the shell and tube heat exchanger and the new water supply port in the new water supply channel are communicated with the mixing channel, This mixing path should be equipped with a mixing valve, which allows mixing of fresh water before and after heat exchange with laundry wastewater and maintaining the temperature of fresh water supplied to a commercial washing machine at a constant temperature. It becomes.

  An embodiment of a wastewater utilization system for a commercial washing machine according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a wastewater utilization system for a commercial laundry machine according to the present embodiment. Is a commercial washing machine, and in the present embodiment, the commercial washing machine WM is a continuous washing machine.

  In the figure, the portion shown by 1 is the wastewater utilization system for the commercial washing machine of this embodiment, and the wastewater utilization system 1 for the commercial laundry machine in this embodiment has a drainage receiving tank for receiving the laundry wastewater. doing. That is, in the figure, reference numeral 2 denotes a drainage receiving tank, and the drainage receiving tank 2 is connected to a washing tub and a rinsing tub of the commercial washing machine through a drainage supply path.

  Here, in the figure, 3 is a drainage supply path, and this drainage supply path 3 has a supply path side drainage inlet 4 connected to the commercial washing machine WM on the base end side, A drainage supply port 5 connected to the drainage receiving tank 2 is provided so that the washing drainage in the commercial washing machine WM can be supplied to the drainage receiving tank 2.

  Next, 6 is a drainage channel in the figure. That is, a drainage channel 8 is connected to the drainage receiving tank 2, and the washing drainage in the drainage receiving tank 2 can be drained to the outside through the drainage channel 6.

  Here, the drainage channel 6 will be described. In this embodiment, the drainage channel 6 has a drainage channel side drainage receiving port 7, and the drainage channel side drainage port 7 is connected to the drainage receiving tank 2. .

  Further, the drainage channel 6 has a drainage port 8 on the tip side, and the wastewater in the drainage receiving tank 2 received from the drainage channel side drainage receiving port 7 is drained to the outside through the drainage port 8. It is possible.

  Further, a first drainage valve 9, a second drainage valve 10, and a drainage pump 11 are arranged in the middle of the drainage channel 6, and the first drainage for measuring the temperature of the washing drainage in the drainage channel 6. A temperature sensor 12 and a second drainage temperature sensor 13 are arranged. The first drainage valve 9 is arranged on the drainage channel side drainage inlet 7 side, the second drainage valve 10 is arranged on the drainage port 8 side, and the drainage pump 11 is arranged in the vicinity of the first drainage valve 9. ing.

  In the figure, the inside of the drainage receiving tank 2 is separated into a plurality of rooms by a screen 14. The screen 14 is formed with a gap between the upper end and the ceiling portion of the drainage receiving tank 2, so that the plurality of rooms communicate with each other in the upper portion, and the laundry drainage exceeds the upper end of the screen 14. The laundry drainage can be moved to the next room.

  Next, 15 is a fresh water supply path in the figure. That is, the wastewater utilization system for a commercial washing machine of the present embodiment has a fresh water supply path 15 for supplying fresh water for washing to the commercial washing machine. The new water supply passage 15 has a new water receiving port 16 connected to a supply hose for tap water or the like on the base end side, and supplies the new water to the commercial washing machine on the front end side. The new water supply port 17 is provided so that new water can be supplied to the washing tub and the rinsing tub of the commercial washing machine. In the present embodiment, a first fresh water temperature sensor 18 and a second new water temperature sensor 19 for measuring the temperature of fresh water in the fresh water supply path 15 are provided.

  Next, 20 is a shell and tube type heat exchanger. That is, the wastewater utilization system for a commercial washing machine of this embodiment has a shell and tube type heat exchanger 20, and in the shell and tube type heat exchanger 20, the washing wastewater and fresh water are separated. Heat exchange is carried out, and the temperature of the fresh water is raised by the heat of the laundry wastewater.

  Here, the shell and tube heat exchanger 20 will be described. In this embodiment, a plurality of shell and tube heat exchangers 20 connected to each other are used, and this series of shell and tube heat exchangers 20 is used. A vessel 20 is arranged in the middle of the drainage channel 6 and the fresh water supply channel 15.

  That is, in this embodiment, the drainage channel 6 is composed of an upstream drainage channel 6A and a downstream drainage channel 6B, and the upstream drainage channel 6A is a drainage whose base end is connected to the drainage receiving tank 2. A roadside drainage inlet 7 is provided. The first drainage valve 9 and the drainage pump 11 are arranged in the middle of the upstream drainage channel 6 </ b> A, and the drainage temperature in the upstream drainage channel 6 </ b> A is measured by the first drainage temperature sensor 12.

  On the other hand, the downstream drainage channel 6B has a drainage port 8 at the tip, the second drainage valve 10 is disposed in the middle of the downstream drainage channel 6B, and the drainage temperature in the downstream drainage channel 6B is the same as that described above. The second waste water temperature sensor 13 is used for measurement.

  And the front-end | tip of the said upstream drainage channel 6A and the base end of the downstream drainage channel 6B are connected with the inlet side and outlet side of the tube of the said shell & tube type heat exchanger 20, respectively. That is, in the wastewater utilization system for a commercial washing machine according to the present embodiment, the tube of the shell & tube type heat exchanger 20 is interposed in the middle of the drainage passage 6, so that the washing wastewater in the drainage receiving tank 2 is not discharged. The drainage port 8 drains through the upstream drainage channel 6A, the tube of the shell-and-tube heat exchanger 20, and the downstream drainage channel 6B. In the figure, the tubes of each shell and tube type heat exchanger 20 are connected by a connecting pipe 26.

  Next, in the present embodiment, the fresh water supply path 15 is composed of an upstream fresh water supply path 15A and a downstream fresh water supply path 15B, and the upstream side fresh water supply path 15A has a base end side. A fresh water inlet 16 is provided, a fresh water supply port 17 is provided at the tip of the downstream fresh water supply passage 15B, and the temperature in the upstream fresh water supply passage 15A is measured by the first fresh water temperature sensor 18. The temperature in the downstream fresh water supply passage 15B is measured by the second fresh water temperature sensor 19.

  The distal end of the upstream fresh water supply passage 15A and the proximal end of the downstream fresh water supply passage 15B are connected to the inlet side and the outlet side of the shell of the shell and tube heat exchanger 20, respectively. That is, in the wastewater utilization system for a commercial washing machine of the present embodiment, the shell of the shell & tube type heat exchanger 20 is interposed in the new water supply path 15, and accordingly, from the new water inlet 16. The received fresh water passes from the fresh water supply port 17 to the commercial washing machine WM through the upstream fresh water supply passage 15A, the shell of the shell-and-tube heat exchanger 20 and the downstream fresh water supply passage 15B. It is supposed to be supplied.

  Accordingly, the fresh water supplied to the commercial washing machine WM is heat-exchanged with the washing waste water passing through the tube of the shell & tube type heat exchanger 20 in the process of passing through the shell of the shell & tube type heat exchanger 20. Then, it is supplied to a commercial washing machine in a state where it is heated to a predetermined temperature. In the figure, the shells of the shell-and-tube heat exchangers 20 are connected by a connecting pipe 25.

  As described above, in this embodiment, since the shell / tube heat exchanger 20 is used to heat the fresh water using the heat of the washing waste water, the fresh water used for washing every time it is washed. Compared to the conventional method of heating the boiler to a predetermined temperature using steam from the boiler, it is possible to reduce the cost for driving the boiler.

  In addition, since fresh water is heated using the heat of laundry wastewater using a shell-and-tube heat exchanger, the temperature of laundry wastewater can be lowered, which adversely affects bacteria that perform activated sludge treatment. Therefore, it is possible to prevent the wastewater treatment from being costly such as extra chemicals, bacterial nutrients, and bacterial supplementation.

  Furthermore, in this embodiment, since drainage is passed through the tube of the shell and tube type heat exchanger 20, each tube can be disassembled and cleaned, and lint and scale contained in the laundry drainage can be easily removed. Is possible.

  Next, 21 is a circulation path in the figure. That is, in the wastewater utilization system for a commercial washing machine of the present embodiment, the proximal end is connected between the second drainage valve 10 and the shell & tube heat exchanger 20 in the downstream drainage channel 6B, and the distal end side is A circulation path 21 connected to the drain receiving tank 2 is provided.

  Thus, the second drainage valve 10 and the shell-and-tube heat exchanger 20 in the downstream drainage path 6B are communicated with the drainage receiving tank 2 by the circulation path 21, and further, the circulation path 21 is connected to the circulation path 21. Comprises a circulation valve 22.

  Therefore, with this configuration, when the drainage pump 11 is driven with the second drainage valve 10 closed and the first drainage valve 9 and the circulation valve 22 open, the upstream drainage channel 6A, shell and tube type heat Washing drainage in the drainage receiving tank 2 can be circulated through the tube of the exchanger 20, the front side of the second drainage valve 10 in the downstream drainage path 6 </ b> B, and the circulation path 21. Therefore, it is possible to clean the inside of the drainage receiving tank 2, the drainage channel 6, and the tube of the shell & tube type heat exchanger 20 by circulating the washing wastewater while the cleaning liquid is put in the drainage receiving tank 2. .

  Next, in the figure, 23 is a mixing path, and 24 is a mixing valve for mixing. That is, in this embodiment, the upstream side fresh water supply path 15 </ b> A and the downstream side fresh water supply path 15 </ b> B are communicated with each other through the mixing path 23, and a mixing valve 24 is disposed along the mixing path 23. Then, when the fresh water heated by exchanging heat with the laundry wastewater exceeds the predetermined temperature, the fresh water before heat exchange is mixed with the warmed fresh water. It becomes possible to maintain the temperature of the fresh water supplied to the washing machine at a constant temperature.

  Next, the operation of the wastewater utilization system for the commercial washing machine of this embodiment configured as described above will be described. In the wastewater utilization system for the commercial laundry machine of this embodiment, in the first washing, from the boiler Although it is necessary to heat fresh water to a predetermined temperature using steam, it is not necessary to heat fresh water used for washing using steam from a boiler in subsequent washing. That is, when the commercial washing machine is in operation, when it is necessary to supply fresh water heated to a predetermined temperature to the commercial washing machine WM, the first drainage valve 9 and the second drainage The valve 10 is opened, the circulation valve 22 is closed, the drain pump 11 is driven, and fresh water is received from the fresh water receiving port 16.

  Then, the washing wastewater supplied to the drainage receiving tank 2 through the drainage supply channel 3 passes through the upstream drainage channel 6A, the tube of the shell-and-tube heat exchanger 20, and the downstream drainage channel 6B. Drained from the mouth 8.

  At the same time, fresh water received from the fresh water inlet 16 passes through the upstream fresh water supply passage 15A, the shell of the shell-and-tube heat exchanger 20, and the downstream fresh water supply passage 15B. Supplied from the mouth 17 to the commercial washing machine WM,

  The washing waste water and fresh water are heat-exchanged in the process of passing through the shell and tube of the shell and tube heat exchanger 20, and the new water is heated by the washing waste water to reach a predetermined temperature and then supplied to the commercial washing machine. On the other hand, the washing waste water is drained from the drain port 8 in a state where the temperature is lowered.

  At this time, the temperature of the washing waste water is measured by the first waste water temperature sensor 12 and the second waste water temperature sensor 13, and the temperature of the fresh water is measured by the first fresh water temperature sensor 18 and the second fresh water temperature sensor 19. . When the temperature of the fresh water is equal to or higher than the predetermined temperature, the mixing valve 24 is opened, and the fresh water before heat exchange is mixed with the fresh water heated by heat exchange with the laundry waste water. The temperature of the fresh water supplied to the washing machine is maintained at a constant temperature. On the other hand, when the temperature of the fresh water is lower than the predetermined temperature, the fresh water is heated to the predetermined temperature by steam from the boiler.

  Further, when the commercial washing machine is stopped and the inside of the drain receiving tank 2 is washed, the second drain valve 10 is closed and the first drain valve 9 and the circulation valve 22 are opened, and the drain pump 11 is driven and a cleaning liquid is put into the drainage receiving tank 2. Then, the drainage in the drainage receiving tank 2 via the upstream drainage channel 6A, the tube of the shell and tube type heat exchanger 20, the front side of the second drainage valve 10 in the downstream drainage channel 6B, and the circulation channel 21. Circulates, and thereby the inside of the drain receiving tank 2, the drain 6, and the tube of the shell and tube type heat exchanger 20 can be cleaned.

  As described above, according to the wastewater utilization system of the commercial washing machine of the present embodiment, in order to heat fresh water using the heat of the laundry wastewater, the fresh water used for washing is changed every time washing is performed. Compared with the conventional method of heating up to a predetermined temperature using steam from the boiler, the operation of the boiler can be suppressed to less than half, so the life of the boiler can be extended to more than twice the conventional, In addition, the maintenance frequency of the boiler is reduced, so that the cost for driving the boiler can be significantly reduced and energy saving can be achieved.

  Also, since it can be rinsed with warm fresh water, unlike the case of rinsing with cold water, the items that have been washed are warm, so the drying time in the dryer can be shortened and drying is possible. It is also possible to reduce the fuel cost required.

  Furthermore, since the heat of the laundry wastewater is used to heat the fresh water by exchanging heat with the fresh water, the temperature of the laundry wastewater can be lowered, and the laundry wastewater after the washing is finished is left as it is. Compared to the case of draining, there is no adverse effect on bacteria that perform activated sludge treatment, and therefore it is possible to prevent the wastewater treatment from being costly such as extra chemicals, bacteria nutrients, and bacteria supplementation. Is possible.

  Furthermore, in this embodiment, since drainage is passed through the tube of the shell and tube type heat exchanger 20, it is possible to disassemble and clean each tube, and it is easy to remove lint and scale contained in the laundry drainage. Is possible.

  Further, in this embodiment, since a plurality of shell and tube type heat exchangers 20 are connected and used, disassembly and cleaning can be performed for each unit, and cleaning is easy, and replacement is performed for each unit. It is also possible to do this, so the replacement work is simple.

  The wastewater utilization system for a commercial washing machine according to the present invention can be applied to all washing machines in order to heat fresh water used for washing using washing wastewater after washing.

DESCRIPTION OF SYMBOLS 1 Drainage utilization system 2 Drainage receiving tank 3 Drainage supply path 4 Supply path side drainage inlet 5 Supply path side drainage supply port 6 Drainage path 6A Upstream drainage path 6B Downstream drainage path 7 Drainage path side drainage inlet 8 Drainage outlet 9 1st Drain valve 10 Second drain valve 11 Drain pump 12 First drain temperature sensor 13 Second drain temperature sensor 14 Screen 15 Fresh water supply path 15A Upstream new water supply path 15B Downstream new water supply path 16 Fresh water inlet 17 New water supply port 18 First fresh water temperature sensor 19 Second fresh water temperature sensor 20 Shell & tube type heat exchanger 21 Circulation path 22 Circulation valve 23 Mixing path 24 Mixing valve

Claims (3)

A wastewater utilization system for a commercial washing machine,
A drainage receiving tank (2) for receiving laundry drainage from a commercial washing machine,
A drainage supply path (3) for supplying washing drainage to the drainage receiving tank (2);
A drainage channel (6) having a drainage port (8) for draining the washing drainage received in the drainage receiving tank (2) from the drainage port (8) to the outside;
A drainage pump (11) for draining the washing drainage in the drainage receiving tank (2) through the drainage channel (6);
A new water supply channel (15) for supplying new water to a commercial washing machine, comprising a new water inlet (16) and a new water supply port (17);
A plurality of shell-and-tube heat exchangers (20) for exchanging heat between the washing waste water and the fresh water,
The shell of the shell and tube type heat exchanger (20) is arranged in the middle of the new water supply channel (15),
A wastewater utilization system for a commercial washing machine, characterized in that a tube of the shell and tube heat exchanger (20) is disposed in the middle of the drainage channel (6).   A drainage valve (10) is provided between the drainage port (8) and the shell and tube heat exchanger (20) in the drainage channel (6), and the drainage valve (10) and the shell and tube type heat are provided. A circulation path (21) communicating the drainage path (6) and the drainage receiving tank (2) is disposed between the exchangers (20), and a circulation valve (22) is provided in the circulation path (21). The wastewater utilization system for a commercial washing machine according to claim 1.   Communication between the fresh water inlet (16) and the shell and tube heat exchanger (20) and between the shell and tube heat exchanger (20) and the fresh water supply port (17) in the fresh water supply channel (15). The waste water of a commercial washing machine according to claim 1 or 2, wherein the mixing passage (23) is provided with a mixing valve (24). Usage system.

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