A laundry dragon nanofiltration filtration system

Abstract

The present invention discloses a nanofilter filtration system for a laundry dragon, which is composed of the following parts: a water inlet pipe, connected to the rinsing bin and / or neutralizing bin of the laundry dragon to collect washing water; a pretreatment assembly, one end of which is connected to the water inlet pipe; a nanofilter assembly, connected to the pretreatment assembly; the nanofilter assembly includes a water inlet, a water production outlet, a concentrated water outlet, as well as a water production isolation valve, a water inlet isolation valve, a nanofilter membrane sheet and a central pipe; the water inlet, the water production outlet and the concentrated water outlet are respectively fixedly arranged in a large round pipe from the outer ear, and the large round pipe is connected to the central pipe; the water production isolation valve is close to the side wall of the central pipe, and a nanofilter membrane sheet is arranged between the water inlet isolation valve and the water production isolation valve to filter the rinsing water; it also includes a tape envelope, and a nanofilter membrane sheet is also arranged between the tape envelope and the water inlet isolation valve; a post-treatment assembly, communicated with the nanofilter assembly and connected to a water outlet pipe to recycle the filtered water. The present invention makes full use of all washing water, reduces costs and is energy-saving and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of washing system filtration, and particularly to a filtration system for a laundry dragon, and more particularly to a nanofiltration filtration system for a laundry dragon. Background Art

[0002] Tunnel washing machines are abbreviated as "laundry dragons". Compared with traditional washing machines, this equipment adopts water circulation and filtration technologies, greatly reducing water consumption and steam consumption; it can save water, electricity and labor. The laundry dragon has excellent performance and high reliability.

[0003] Each chamber of the laundry dragon washes simultaneously. Each chamber section can work according to different instructions from the computer according to procedures such as pre-washing, main washing, rinsing, and neutralization. It is conveyed simultaneously. After the fabrics in each laundry cage are washed for a set time, they are simultaneously conveyed to the next laundry cage, that is, from the first chamber to the last chamber in one push. After exiting the last chamber, it enters a pressing machine for dehydration. However, during the process of implementing the technical solutions in the prior art, the applicant found the following technical problems in the technical solutions of the prior art:

[0004] Currently, the drainage of laundry dragons on the market all has a water reuse function. However, this kind of reuse mixes the water discharged from all washing steps and all chambers of the laundry dragon together, without classified collection. Only unified collection and unified treatment are carried out before common use. The mixed water has more pollutants. To achieve the water quality requirements for rinsing after treatment, the removal rate of pollutants needs to be very high. The treatment process requirements are complex, and the equipment purchase cost for water treatment is relatively large (the equipment purchase cost is about 500,000 - 800,000 yuan), and the daily water treatment cost is relatively high (the treatment cost per ton of water is about 3 - 5 yuan), and the final water quality may not meet the requirements of the rinsing process. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a nanofiltration filtration system for a laundry dragon, which solves the technical problems of high washing water treatment cost and unsatisfactory water quality after treatment in the prior art, and achieves the technical effects of reducing the washing water treatment cost and making full use of the washing water.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows:

[0007] A nanofiltration filtration system for a laundry dragon is composed of the following parts:

[0008] An inlet pipeline, which is connected to the rinsing chamber and / or the neutralization chamber of the laundry dragon to collect washing water;

[0009] A pretreatment component, one end of which is connected to the inlet pipeline;

[0010] A nanofiltration module, connected to the pretreatment module; the nanofiltration module includes a water inlet, a product water outlet, a concentrated water outlet, a product water isolation valve, a water inlet isolation valve, a nanofiltration membrane sheet and a central pipe; the water inlet, the product water outlet and the concentrated water outlet are respectively fixedly arranged in a large round pipe from the outer ear, and the large round pipe is connected to the central pipe; the product water isolation valve is close to the side wall of the central pipe, and a nanofiltration membrane sheet is arranged between the water inlet isolation valve and the product water isolation valve to filter the washing water; it also includes a tape envelope, and a nanofiltration membrane sheet is also arranged between the tape envelope and the water inlet isolation valve;

[0011] A post-treatment module, communicating with the nanofiltration module and connected to a water outlet pipe; the water outlet pipe is connected to a recycled water collection container of a laundry dragon to recycle the filtered water.

[0012] Preferably, the nanofiltration module is directly connected to the water inlet pipe.

[0013] Preferably, the pretreatment module is provided with an adjustment tank.

[0014] More preferably, the pretreatment module is further provided with a sedimentation tank connected to the adjustment tank.

[0015] More preferably, the post-treatment module is provided with a carbon adsorption device.

[0016] Particularly preferably, the pretreatment module is further provided with an oxidation contact tank; the post-treatment module is further provided with a reverse osmosis membrane.

[0017] Preferably, the order of the reverse osmosis membrane and the carbon adsorption device can be adjusted.

[0018] One or more technical solutions provided by the present application have at least the following technical effects or advantages:

[0019] For the above technical solutions, by adopting a series of technical means such as connecting the water inlet pipe of the rinsing bin or / and the neutralization bin of the laundry dragon to the pretreatment module and then connecting to the nanofiltration module provided with a nanofiltration membrane sheet, and then passing through the post-treatment module and connecting to the water outlet pipe for recycling, the pollutant content in the water used in all processes except pre-washing and main-washing is less than half of the drainage of pre-washing and main-washing, and the COD is about 50 or less, that is, the removal rate is about 70%, meeting the water quality requirements of rinsing water, and it can also be mixed with clean water for the last water passing. Since the discharged water to be treated does not come from the pre-washing bin and the main-washing bin with high pollution degree, but from the rinsing bin with low pollution degree, the equipment cost of this water treatment is low and the filtering effect is remarkable. It effectively solves the technical problems of high cost of washing water treatment and unsatisfactory water quality after treatment in the prior art of laundry dragons, and further realizes the technical effects of reducing the cost of washing water treatment and fully recycling the washing water. Description of the Drawings

[0020] Figure 1Schematic structural diagram of the present invention;

[0021] Figure 2 Schematic structural diagram of the nanofiltration module in the present invention;

[0022] Figure 3 Schematic structural diagram of the implementation manner of the present invention using an adjustment tank;

[0023] Figure 4 Schematic structural diagram of the implementation manner of the present invention using an adjustment tank combined with a sedimentation tank;

[0024] Figure 5 Schematic structural diagram of the implementation manner of the present invention using a sedimentation tank and a sedimentation tank combined with a carbon adsorption device;

[0025] Figure 6 Schematic structural diagram of the implementation manner of the present invention using a sedimentation tank, a sedimentation tank, a biological contact oxidation tank, combined with a carbon adsorption device and a reverse osmosis membrane.

[0026] In the figure, 10 - inlet pipe, 20 - outlet pipe, 100 - pretreatment module, 110 - adjustment tank, 120 - sedimentation tank, 130 - biological contact oxidation tank, 200 - post-treatment module, 210 - carbon adsorption device, 220 - reverse osmosis membrane, 300 - nanofiltration module, 310 - water inlet, 313 - concentrated water outlet, 315 - product water outlet, 320 - product water isolation valve, 330 - inlet isolation valve, 340 - tape envelope, 350 - central pipe, 360 - nanofiltration membrane sheet. Detailed implementation manners

[0027] The following further describes the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be noted here that the description of these implementation manners is used to help understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the various implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] The drainage of the washing machine has a reuse function, but this type of reuse is to mix the water discharged from all the washing steps and all the tanks of the washing machine together, without classification and collection, and only uniformly collect and filter the water before reuse. The mixed water contains many pollutants. To achieve the water quality required for rinsing after treatment, the removal rate of pollutants needs to be very high, the treatment process requires complex requirements, and the cost of purchasing water treatment equipment is large. The daily water treatment cost is high, and the final water quality may not meet the requirements of the rinsing process. Imported filter membranes are generally very expensive and need to be replaced every once in a while. The technical solution of the embodiment of the present application solves the problems of high washing water treatment cost and unsatisfactory water quality after treatment in the prior art by providing a washing machine nanofiltration filtration system. The water inlet pipe connected to the rinsing tank or / and the neutralization tank of the washing machine is connected to the pretreatment component and then connected to the nanofiltration component provided with a nanofiltration membrane, and then connected to the water outlet pipe through the post-treatment component for reuse to achieve the beneficial effects of reducing the washing water treatment cost and fully reusing the washing water.

[0029] The overall idea of ​​the implementation scheme of the present invention to solve the above technical problems is as follows:

[0030] A series of technical means are adopted, such as connecting the water inlet pipe of the rinsing chamber and / or the neutralization chamber of the tunnel washer to the pretreatment component and then to the nanofiltration component provided with a nanofiltration membrane, and then connecting the water outlet pipe through the post-treatment component for reuse, so that the pollutant content in the water used in all processes except pre-washing and main washing is less than half of the pre-washing and main washing drainage (COD is about 700 and 450, and after nanofiltration treatment, COD is about 50 or less), that is, the removal rate is about 70%, which meets the water quality requirements of rinsing water, and can also be mixed with clean water for the last water rinse.

[0031] Specifically, since the discharge water that needs to be treated does not come from the pre-wash tank and the main wash tank with a high pollution degree, but comes from the washing tank with a lower pollution degree, the equipment cost of the water treatment is low, and there is no need to use expensive high-standard filtering equipment. Before filtration, the washing discharge water is selectively used and then filtered using the present invention, avoiding the discharge water with a high pollution degree, and the effect after filtration is significant.

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Example 1

[0034] A nanofiltration system for washing machines, such as Figure 1 and Figure 2 As shown, it consists of the following parts:

[0035] A water inlet pipe connected to the rinsing chamber and / or the neutralization chamber of the tunnel washer to collect washing water;

[0036] A pretreatment component, one end of which is connected to the water inlet pipe;

[0037] A nanofiltration component, connected to the pretreatment component; the nanofiltration component includes a water inlet, a water production outlet, a concentrated water outlet, a water production isolation valve, a water inlet isolation valve, a nanofiltration membrane sheet and a central pipe; the water inlet, the water production outlet and the concentrated water outlet are respectively fixedly arranged in a large circular pipe from the outer ear, and the large circular pipe is connected to the central pipe; the water production isolation valve is close to the side wall of the central pipe, and a nanofiltration membrane sheet is arranged between the water inlet isolation valve and the water production isolation valve to filter the washing water; it also includes a tape envelope, and a nanofiltration membrane sheet is also arranged between the tape envelope and the water inlet isolation valve;

[0038] A post-treatment component, communicated with the nanofiltration component and connected to the water outlet pipe; the water outlet pipe is connected to the recycled water collection container of the laundry dragon to recycle the filtered water.

[0039] The nanofiltration component is directly connected to the water inlet pipe.

[0040] Embodiment 2

[0041] As Figure 3 shown, on the basis of the above, the pretreatment component is provided with an adjustment tank.

[0042] Specifically, as Figure 4 shown, the pretreatment component is also provided with a sedimentation tank connected to the adjustment tank.

[0043] More specifically, as Figure 5 shown, the post-treatment component is provided with a carbon adsorption device.

[0044] Embodiment 3

[0045] As Figure 6 shown, on the basis of the above, the pretreatment component is also provided with an oxidation contact tank; the post-treatment component is also provided with a reverse osmosis membrane. The order of the permeation membrane and the carbon adsorption device can be adjusted.

[0046] The core of the above embodiments is a nanofiltration system, and the removal rate of various pollutants is as high as over 70%. The sewage is pressurized by a high-pressure pump and then enters the reverse osmosis membrane component. Due to the selective permeability of the nanofiltration membrane, water can pass through the nanofiltration membrane into the fresh water side under high pressure, and various pollutants are flushed out with the high-pressure water.

[0047] The characteristics of the nanofiltration system are as follows:

[0048] 1. Meet the drinking water qualification certification (ANSI / NSF60) standard;

[0049] 2. Full-automatic control system

[0050] 3. Designed for the characteristics of reclaimed water reuse, and the reclaimed water can be freely distributed (except for pre-washing and main washing)

[0051] 4. Nanofiltration can remove a variety of pollutants, including: SS, COD, TDS, LAS, microorganisms, bacteria, organic matter, solid particles, etc., ensuring the quality of recycled water.

[0052] The details of using Example 1 and other water treatment methods for washing water treatment are as follows:

[0053] Table 1 shows the content of various harmful substances in the untreated washing wastewater.

[0054]

[0055]

[0056]

[0057]

[0058]

[0059] As can be seen from the above, the nanofiltration system in Example 1 alone can remove a large amount of harmful substances from the washing water. Other examples combine accessory facilities other than the nanofiltration system, which can better perform water filtration. Since the filtration effect of using the nanofiltration system alone in Example 1 is ideal, Example 1 is a filtration method with good cost performance.

[0060] The invention classifies and collects, classifies and recycles the drainage from different washing steps of the laundry dragon, and optimizes the water treatment process. Its process flow is mainly as follows: The high-concentration drainage from the main washing part of the front compartment of the laundry dragon and the drainage with a relatively high concentration during the first water rinse are not used for rinse water recycling, but only for pre-washing or main-washing recycling.

[0061] For all the drainage after the second water rinse, it is treated clean by the nanofiltration process and used for the water consumption of all processes except pre-washing and main-washing. In order to ensure perfect quality, a certain proportion of clean water can also be added.

[0062] Since the pollutant content (COD is only 170) of the above-mentioned reclaimed water [the water consumption of all processes except pre-washing and main-washing] is less than half of that of the first two drainages (COD is about 700 and 450), after being treated by nanofiltration (and adding other treatment processes), the COD is about 50 or less, that is, the removal rate is about 70%, which can meet the water quality requirements of the rinse water, and can also be mixed with clean water for the last water rinse. The equipment cost for purchasing water treatment using this process is relatively low (if only using a nanofiltration device, the purchase cost is about 200,000 yuan), the floor area is small, and the daily water treatment cost is relatively low (the treatment cost per ton of water is about 1 yuan).

[0063] The present invention mainly processes the washing water through a nanofiltration system and recycles the reclaimed water, which can specifically preserve the beneficial parts of the recycled washing water and remove the harmful parts. In the current laundry dragon, there are problems such as excessive water volume and mixed and excessive recycled water. The present invention can fully utilize all the washing water, with a lower cost than the current market water treatment, and is energy-saving and environmentally friendly.

[0064] The above describes the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principles and spirit of the present invention, various changes, modifications, substitutions, and variations to these embodiments still fall within the protection scope of the present invention.

Claims

1. A nanofilter filtration system for a laundry dragon, characterized in that: It consists of the following parts: An inlet pipe, which is connected to the rinsing bin and / or neutralizing bin of the laundry dragon to collect washing water; A pretreatment component, one end of which is connected to the inlet pipe; A nanofilter component, which is connected to the pretreatment component; the nanofilter component includes an inlet, a product water outlet, a concentrate outlet, a product water isolation valve, an inlet isolation valve, a nanofilter membrane sheet and a central pipe; the inlet, the product water outlet and the concentrate outlet are respectively fixedly arranged in a large round pipe from the outer ear, and the large round pipe is connected to the central pipe; the product water isolation valve is close to the side wall of the central pipe, and a nanofilter membrane sheet is arranged between the inlet isolation valve and the product water isolation valve to filter the washing water; it also includes a tape envelope, and a nanofilter membrane sheet is also arranged between the tape envelope and the inlet isolation valve; A post-treatment component, which is communicated with the nanofilter component and connected to an outlet pipe; the outlet pipe is connected to a recycled water collection container of the laundry dragon to recycle the filtered water; The post-treatment component is provided with a carbon adsorption device; By using an inlet pipe connected to the rinsing bin and / or neutralizing bin of the laundry dragon to connect to the pretreatment component and then connect to a nanofilter component provided with a nanofilter membrane sheet, and then passing through the post-treatment component to connect to the outlet pipe for recycling, so that the content of pollutants in the water used in all processes except pre-washing and main washing is less than half of the drainage of pre-washing and main washing, and the COD is below 50, that is, the removal rate is 70%, meeting the water quality requirements of rinsing water.

2. The nanofilter filtration system for a laundry dragon according to claim 1, characterized in that: The nanofilter component is directly connected to the inlet pipe; the mixed clear water is used for the last pass.

3. The nanofilter filtration system for a laundry dragon according to claim 2, characterized in that: The pretreatment component is provided with an adjustment tank.

4. The nanofilter filtration system for a laundry dragon according to claim 2, characterized in that: The pretreatment component is also provided with an oxidation contact tank; the post-treatment component is also provided with a reverse osmosis membrane.

5. The nanofilter filtration system for a laundry dragon according to claim 4, characterized in that: The order of the reverse osmosis membrane and the carbon adsorption device can be adjusted.

Images