JP2007267912A - Method of washing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of washing, which is capable of sanitarily finishing washed objects. <P>SOLUTION: The method of washing comprises a washing step S1 of washing the washed objects with a detergent, a first rinsing step S2 for rinsing the washed objects washed in the washing step and draining water, and a second rinsing step S3 for rinsing the washed objects rinsed in the first rinsing step again. The method of washing also comprises a drain purifying step S4 for purifying the drain only in the first and second rinsing steps and generating purified water. The purified water is used in the washing step and the first rinsing step, and clean water is used in the second rinsing step. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a washing method for washing laundry using waste water.

  Since a large amount of water is required to wash clothes such as clothes, it is desired to use laundry waste water to reduce water costs and effectively use water resources.

  As a response to such a demand, for example, there is a wastewater recycling system disclosed in Patent Document 1.

As shown in FIG. 4, the wastewater recycling system 100 includes a first treatment device 103 that performs ozone treatment on laundry wastewater discharged from a washing machine, a second treatment device 106 that performs ultraviolet treatment, and a first treatment device that performs microbial treatment. 3 is a system that obtains purified water to be supplied to the washing machine by purifying the washing waste water.
Japanese Patent Laid-Open No. 10-15567

  However, in the system as described above, there is a problem that since the laundry wastewater contains a large amount of detergents and contaminants, the load on the system increases and clean purified water cannot be obtained. Thereby, there existed a possibility that to-be-washed | cleaned material may not become clean.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a washing method that can clean the laundry.

  The object of the present invention is to wash a laundry using a detergent, a first rinsing step for rinsing and draining the laundry washed in the washing step, and a rinsing in the first rinsing step. And a second rinsing step for rinsing the washed laundry again, wherein the first of the waste water in the washing step, the first rinsing step and the second rinsing step A waste water purification step of generating purified water by purifying only waste water in the rinsing step and the second rinsing step, wherein the washing step and the first rinsing step use the purified water; This rinsing step is achieved by a washing method using only clean water.

  Moreover, it is preferable that the said waste water purification process purifies rain water and produces | generates purified water with the waste_water | drain in the said 1st rinse process and the said 2nd rinse process.

  According to the washing method of the present invention, the laundry can be finished cleanly.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  First, a washing apparatus used for a washing method according to an embodiment of the present invention will be described. FIG. 1 is a schematic configuration diagram showing an example of the washing apparatus. As shown in FIG. 1, the washing apparatus 1 includes a washing machine 2 that performs washing and discharges washing wastewater, a drainage line 8 that discharges drainage from the washing machine 2, and a drainage that branches off from the drainage line 8. Waste water recovery line 3 to be recovered, waste water purification device 4 that purifies the waste water collected by the waste water recovery line 3 to produce purified water, and purification that supplies the purified water generated by the waste water purification device 4 to the washing machine 2 And a water supply line 5. In addition, the washing apparatus 1 includes a water supply line 6 that supplies clean water to the washing machine 2, a water supply line 9 that supplies clean water to the waste water purification apparatus 4, and collects rainwater to the waste water purification apparatus 4. A rainwater recovery line 7 is provided. Here, “clean water” in this specification is tap water and clean water that can be used for drinking.

  The washing machine 2 includes a washing tub in which the laundry is stored, an inlet for injecting water into the washing tub, a motor for rotating water in the washing tub, a drain outlet for discharging drainage (not shown). It is possible to use a publicly known one for washing and rinsing the laundry by generating a water flow by rotation of the motor. In the present embodiment, the washing machine 2 that can perform the washing process including the pre-washing and the main washing and the three rinsing processes is used, and the first rinsing process is defined as the first rinsing process. The second rinsing step is the second rinsing step. The washing machine 2 includes an operation panel (not shown) for performing various operations such as activation / deactivation.

  The drainage line 8 is connected to the drainage port of the washing machine 2 and is configured to discharge the drainage to the outside of the washing apparatus 1. The drainage recovery line 3 includes a recovery valve 13 that opens and closes the drainage recovery line 3 and is connected to the drainage purification device 4.

  FIG. 2 is a diagram showing a schematic configuration of the waste water purification device 4. As shown in FIG. 2, the waste water purification apparatus 4 includes a pretreatment tank 40 for pretreatment of waste water, a foam removal tank 41 connected in order from the upstream side to the downstream side after the pretreatment tank 40, and first sterilization. A tank 42, a sedimentation tank 43, a first storage tank 44, a filtration tank 45, a second sterilization tank 46, a second storage tank 47, and a water storage tank 64 are provided. The drainage purification device 4 includes a rainwater pretreatment tank 61 that pretreats rainwater, a rainwater storage tank 63 connected to the rainwater pretreatment tank 61, and an ozone generator 48 that generates ozone gas. Pumps and valves are appropriately provided as necessary.

  The pretreatment tank 40 is connected to the waste water recovery line 3 and includes a filter 49 that removes dust from the waste water.

  The bubble removal tank 41 includes a blower 50 that sends air, and an air diffuser pipe 51 that supplies the air sent from the blower 50 into the bubble removal tank 41. The foam removal tank 41 includes a floating foam removing tool 52 that removes bubbles floating on the liquid level of the drainage, and an air lift pipe 53 that discharges the foam removed by the floating foam removing tool 52 with the air sent from the blower 52. It has.

  The first sterilization tank 42 includes a first ozone diffusing tube 54 connected to an ozone generator 48, and sterilizes waste water with ozone gas. A filter 55 for removing impurities is disposed between the first sterilization tank 42 and the precipitation tank 43. The sedimentation tank 43 is provided with an overflow 56 for discharging wastewater exceeding the specified water level to the outside, and impurities are deposited at the bottom.

  The first reservoir 44 includes a float-type submersible pump 57. The submersible pump 57 detects the water level in the first reservoir 44 by the float, and sends the waste water to the filtration tank 45 according to the water level. It is configured. The filtration tank 45 includes a sprinkling pipe 58 connected to the submersible pump 57 at the top. The filtration tank 45 includes a porous material, an inorganic polymer, and the like stacked inside, and is configured to filter the waste water sprayed from the water spray pipe 58.

  The second sterilization tank 46 includes a second ozone diffusing tube 59 connected to an ozone generator 48, and is configured to sterilize waste water with ozone gas.

  The second reservoir 47 includes a filter 60 that filters the waste water. The second reservoir 47 is connected to the purified water supply line 5 via a strainer 66 that removes foreign matters, and the strainer 66 is held in a state of floating in the second reservoir 47 by a float 67. Moreover, the 2nd storage layer 47 is provided with the ball tap 65, and it is comprised so that water may be automatically supplied from the water storage tank 64 according to an internal water level.

  The drinking water storage tank 64 is connected to the drinking water supply line 9 and includes a ball tap 68, and is configured to automatically supply drinking water from the drinking water supply line 9 according to the internal water level. The cross-connection in which the water supply line 9 is directly connected to the second reservoir 47 is prevented.

  The rainwater pretreatment tank 61 is connected to the rainwater recovery line 7 and includes a filter 62 that removes dust from rainwater. The rainwater storage tank 63 is provided with a rainwater overflow 70 for discharging rainwater exceeding a specified water level to the outside. The rainwater storage tank 63 is connected to the second sterilization tank 46 via a rainwater strainer 71 that removes foreign matter, and the rainwater strainer 71 is held in a state of floating in the rainwater storage tank 63 by the rainwater float 72. .

  The purified water supply line 5 is connected to the second reservoir 47 of the waste water purification device 4 and the inlet of the washing machine 2, and as shown in FIG. 1, a water supply pump that sends purified water to the purified water supply line 5. 15 is provided.

  The water supply line 6 is connected to a water supply (not shown) and configured to supply water to the washing machine 2 from the outside of the washing apparatus 1. The water supply line 6 includes a water supply valve 16 that opens and closes the water supply line 6. The water supply line 9 is connected to a water supply (not shown) and the water storage tank 64 of the drainage purification device 4, and is configured to supply water to the water storage tank 64. The rainwater collection line 7 is connected to a rainwater tank 17 that collects rainwater and a rainwater pretreatment tank 61 of the drainage purification device 4.

  Next, a method for washing a laundry using the washing apparatus 1 configured as described above will be described. FIG. 3 is a diagram showing a procedure of a washing method and a flow of washing drainage according to one embodiment of the present invention.

  First, as shown in FIG. 3, a washing process (step S1) of washing the laundry using a detergent is performed. Specifically, washing is performed by operating the operation panel of the washing machine 2 in a state where the washing tub of the washing machine 2 contains the laundry, the detergent, and the purified water generated in the drainage purification process described later. Activate machine 2. When the washing machine 2 is operated, a water flow is generated by the rotation of the motor, and the laundry is washed with purified water. In the washing step (step S1), the laundry is washed by performing pre-washing and subsequent main washing. Further, in the washing process (step S1), the laundry is washed, and the washing waste water in which the detergent is mixed with the purified water is discharged. The washing waste water is discharged to the outside of the washing apparatus 1 through the drain line 8.

  Subsequently, a rinsing process for rinsing the laundry washed in the washing process (step S1) is performed.

  In the rinsing process, first, a first rinsing process (step S2) for rinsing and draining the laundry washed in the washing process (step S1) is performed. Specifically, the purified water generated in the drainage purification process to be described later is sent to the purified water supply line 5 by operating the water pump 15 while the laundry is stored in the washing tub of the washing machine 2. Then, the purified water is supplied to the washing tub of the washing machine 2. Subsequently, the washing machine 2 is operated by operating the operation panel of the washing machine 2. When the washing machine 2 operates, a water flow is generated by the rotation of the motor, and the laundry is rinsed with purified water. In the first rinsing step (step S <b> 2), the laundry is rinsed and the rinsing waste water is discharged to the drain line 8.

  Next, a second rinsing process (step S3) is performed in which the laundry that has been rinsed in the first rinsing process (step S2) is rinsed again. Specifically, by opening the water supply valve 16, clean water is supplied to the washing machine 2 through a clean water supply line 6 from a water supply (not shown). Subsequently, the washing machine 2 is operated by operating the operation panel of the washing machine 2. When the washing machine 2 operates, a water flow is generated by the rotation of the motor, and the laundry is rinsed with clean water. In the second rinsing step (step S <b> 3), the laundry is rinsed and the rinsing waste water is discharged to the drain line 8. Thus, the washing in the washing machine 2 is completed.

  Subsequently, of the waste water in the washing process (step S1) and the rinsing process (step S2) and (step S3), only the waste water in the rinsing process (step S2) and (step S3) is recovered and purified with rainwater for purification. A wastewater purification step (step S4) for generating water is performed. Specifically, first, by opening the recovery valve 13, the rinse wastewater discharged from the washing machine 2 to the drainage line 8 is branched from the drainage line 8 and flows into the drainage recovery line 3. Thereby, the rinse waste water is collected and sent to the pretreatment tank 40 of the waste water purification device 4. The rainwater collected in the rainwater tank 17 is sent to the rainwater pretreatment tank 61 of the drainage purification device 4 via the rainwater recovery line 7. In the waste water purification apparatus 4, as shown in FIG. 2, the rinse waste water supplied to the pretreatment tank 40 is sent to the foam removal tank 41 after the dust is removed by the filter 49. In the bubble removal tank 41, bubbles are floated on the liquid surface by supplying air from the air diffusing pipe 51 to the rinse water. The liquid level bubbles are removed by the floating bubble removing tool 52 and discharged to the outside by the air lift pipe 53.

  The rinsing waste water from which the bubbles have been removed is sent to the first sterilization tank 42, sterilized by the ozone gas supplied from the first ozone diffusion tube 54, and then sent to the precipitation tank 43, where impurities are removed by precipitation. . Thereafter, the rinsing wastewater is sent from the sedimentation tank 43 to the first reservoir 44, and when the water level in the first reservoir 44 exceeds a specified level, the submersible pump 57 is actuated to send to the sprinkler pipe 58. To the filtration tank 45. The rinse water drained is filtered by the filtration tank 45 and then sent to the second sterilization tank 46, sterilized by the ozone gas supplied from the second ozone diffusion pipe 59, and then sent to the second reservoir 47. It is done. Thereafter, the rinse waste water is filtered by the filter 60. In this way, the rinse waste water is purified and purified water is generated.

  Also, the rainwater supplied to the rainwater pretreatment tank 61 is sent to the rainwater storage tank 63 after the dust is removed by the filter 62, and then sent to the second sterilization tank 46 after the foreign matter is removed by the rainwater strainer 71. It is done. Thus, the rainwater merges with the rinsing waste water in the second sterilization tank 46 and is purified together with the rinsing waste water.

  Moreover, the clean water supplied to the clean water storage tank 64 via the clean water supply line 9 is stored in the clean water storage tank 64 and supplied to the second reservoir 47 according to the water level of the second reservoir 47. The

  According to the washing method according to the present embodiment, washing wastewater containing a large amount of detergent, contaminants, and the like out of wastewater in the washing step (S1) and the rinsing steps (S2) and (S3) is discharged to the outside and rinsed. Since the purified water is generated by collecting only the waste water, clean purified water can be obtained, and the washing process (S1) and the first rinsing process (S2) are performed using the purified water. You can finish things cleanly. In addition, since the second rinsing step (S3) uses only clean water, the final washing step can be performed with cleaner water, and the laundry can be finished more cleanly.

  Further, since the drainage purification step (S4) purifies rainwater together with the rinse drainage to generate purified water, the amount of purified water produced can be increased, and washing can be performed with a sufficient amount of water.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment.

  For example, in the present embodiment, the collection valve 13 is opened and closed and the water pump 15 is manually activated. However, a separate control device may be provided and performed automatically.

  In the present embodiment, the waste water discharged to the outside is only the washing waste water. However, waste water containing a softening agent may be discharged.

  Moreover, if the waste water purification apparatus 4 can obtain purified water by purifying waste water, the structure will not be specifically limited.

It is a schematic block diagram which shows the washing apparatus used for the washing method which concerns on one Embodiment of this invention. It is a figure which shows schematic structure of the waste water purification apparatus shown in FIG. It is a figure which shows the procedure of the washing method which concerns on one Embodiment of this invention, and the flow of a washing waste_water | drain. It is a figure which shows schematic structure of the conventional waste water reuse system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing machine 2 Washing machine 3 Drainage collection line 4 Drainage purification apparatus 5 Purified water supply line 6 Water supply line 7 Rainwater collection line 8 Drainage line 13 Collection valve 15 Water supply pump 16 Water supply valve 17 Rainwater tank

Claims (2)

A washing process of washing the laundry using a detergent;
A first rinsing step of rinsing and draining the laundry washed in the washing step;
A washing method comprising: a second rinsing step of rinsing the laundry rinsed in the first rinsing step again,
Of the waste water in the washing step, the first rinsing step, and the second rinsing step, only the waste water in the first rinsing step and the second rinsing step is purified to generate purified water. Further comprising
The washing step and the first rinsing step use the purified water,
The second rinsing step is a washing method using only clean water. The washing method according to claim 1, wherein the waste water purification step purifies rain water together with waste water in the first rinsing step and the second rinsing step to produce purified water.

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