JPS5816944A - Cleaning method of vehicle and the like - Google Patents

Abstract

PURPOSE:To save water and prevent public pollution, when a railway vehicle or the like is cleaned by jetted water and/or medical fluid, by collecting and purifying the waste fluid after its cleaning then recirculatively using this purified water while supplementing a shortage amount from recirculative use with finish pure water. CONSTITUTION:A railway vehicle or the like is removed with a stain by jetting and brushing of medical fluid or water, finally sprayed with pure water and performed finishing. In this case, the water of each fluid used for cleaning is guided to a draining groove, provided in a track floor surface of the vehicle, and collected to a water receiver tank 12. This waste fluid is guided to a neutralizer tank 14 and neutralized to a prescribed range of pH, while guided to a precipitator tank 27 via an aggregation tank 22 and precipitated with a mixed particle, and then upper clear water is fed to a pump tank 29. Further water in the pump tank 29 is fed to a filtering machine 33, and only filtrated water is guided to the second water receiver tank 35 through a separating machine 34, and then its processed water is fed to an injection pipe of water and the like by a pump 36. On the other hand, pure water is accumulated to a pure water tank 38 from a water service pipe 37 and suitably fed by a pump 39.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates primarily to a method for cleaning railway vehicles.

Cleaning the outside surfaces of vehicles, etc. with acidic or alkaline chemicals is carried out on railway vehicles. After making it easy to remove, spray finishing water to wash away the dirt. Generally for railway vehicles.

Approximately 3,000 liters of fresh water is required per car as finishing water, and using tap water would increase costs.

Alternatively, in areas where sufficient water is not available, cleaning may become difficult. Also, liquid medicine.

Even if cleaned waste liquid is treated to meet wastewater standards, depending on the disposal method, it may not flow into nearby fields, harming agricultural crops, or reducing the quality of groundwater and river water. Not only that, but precious water is being wasted, which does not lead to cost reduction or water resource conservation. Therefore, it has been considered to collect the finished clean water and reuse it by adding a chemical solution (Special Public Interest Publication 1986-1990).
Publication No. 25).

After being reused, it is treated as waste liquid and discarded, so it does not result in significant water savings.

The present invention uses a circulation method in which washed chemicals and finished water are collected together with washed away dirt, purified, and reused as finished water. By washing the parts that need to be carefully cleaned, or the entire surface in some cases, with fresh clean water, and replenishing the unavoidable decrease in fresh water for circulating toilets, water consumption can be significantly reduced. This saves money and eliminates pollution.

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

In FIG. 1, water injection pipes 2. First chemical liquid injection pipe 3. Brush 4.
Second chemical liquid injection pipes 5 are arranged in this order, and furthermore, four sets of finishing units 8 each consisting of a finishing water injection pipe 6 and a brush 7 are arranged on both sides, and finally, a fresh water injection pipe 9 is arranged. As can be seen from FIG. 2, a drainage ditch 11 is provided in the floor below the outer surface of the vehicle 10.

Water, chemical liquid, etc. sprayed onto the outer surface of the vehicle 10 from each injection pipe from the first water injection pipe 2 to the last fresh water injection pipe 9,
Finished water and fresh water flow down to the drain 11 and the first water tank 1
It is collected in 2.

The vehicle 10 enters from the left side of the m1 diagram and travels to the right for cleaning. First, the water jet pipe 2 sprays cold water in the summer and prefectural wood in the winter to moisten the exterior surface, and then sprays acidic or alkaline water in the 9th stage. The chemical solution is sprayed from the medicine #L injection pipe 3 and applied uniformly with the brush 4, and the dirt film is damaged with the brush 4 to measure the penetration of the chemical solution.

Furthermore, one drop of the same chemical solution is ejected from the second chemical injection W5 to supplement the f''4 scattered chemical solution at 40 rotations of the bluff.

Next, in the spraying of the chemical solution, the vehicle 10 that has completed the coating process has a long section in order to give time for the dirt made of iron, carbon, silicic acid, etc. to react with the chemical solution and reach a state where it can be easily peeled off and removed. Continue driving as is.

After this reaction process, the vehicle 10 has each finishing unit 8
Spraying finishing water and peeling off the dirt with the brush 7 are repeated to wash away the dirt, and finally, fresh water is sprayed from the fresh water injection pipe 9 onto glass parts such as windows and roofs to complete the finishing process. The brushes 4.7 are individually rotated by an electric F'Q or a hydraulic motor.

Water or hot water and chemical solutions used in cleaning operations.

Finished water and fresh water flow together with dirt and reaction products through the drain 11 and enter the first water receiving tank 12 . When a chemical solution containing oxalic acid as a main ingredient is used, the water tank 12 contains ferric oxalate and carbon along with water.

In addition to dust, iron powder, oils and fats, and surfactants, unreacted oxalic acid and other substances flow in. This waste liquid is transferred to the neutralization tank 14 little by little by a pump 13 at a rate of, for example, about 1 hour per ton.
Emulsion breakers such as sulfuric acid band, which precipitates suspended oils and fats, dust, etc., and neutralizers, such as slaked lime, which neutralizes ferric oxalate, sulfuric acid, oxalic acid, etc., and produce water-insoluble salts. The acid in the neutralization tank 14 is supplied from each tank IFI, 17 to the neutralization tank 14 by a pump 16. The emulsion job (or alkali) is detected by the pH detector 20, and the emulsion job is operated to adjust the power and the amount of neutralizing agent based on the signal from the pH detector 20.

Suspended solids and acidic substances are treated as precipitable substances (RPF), and the waste liquid that has been neutralized to a specified pH range is overflowed to the weir 21.
through which it enters the adjacent flocculation tank 22.

Acrylamide-based or other flocculants are supplied to this flocculation tank 22 from a tank 23 one by one using a pump 24, and the inside of the flocculation tank 22 is stirred by a stirrer 25 rotating at a low speed to cause the particles of the precipitable substances to coagulate. to make it easier to precipitate.

The 9 particles of the waste liquid mixed with the aggregated and enlarged particles settle and accumulate at the bottom, and the supernatant water flows further into the irrigation channel 28.
The settled particles are sent to a sludge tank 31 by a slurry pump 30 together with water.

The water in the pump tank 29 is sent to a filter 33 by a pump 32, which removes suspended solids with small particle sizes and small amounts of oil and fat that were not sedimented and separated in the treatment process, and oil-absorbing sand is used as the filter material. etc. are used. The impurities separated by the filter 33 are returned to the first water receiving tank 12, and the water further passes through a separator 34 using activated carbon, reverse osmosis equipment, ion exchange resin, etc. to remove a trace amount of dissolved surfactants. Removes impurities such as chemicals and salt.

It enters the second water tank 35.

The water, which has been treated to become transparent and almost pure water by sequentially removing solids, suspended solids, chemicals, etc., is pumped up from the second water receiving tank 35 by the pump 36, and is pumped up from the water injection pipe 2. For finishing, the finishing water injection pipe 6 of the unit 8 is blown onto the vehicle. Gita. Fresh water is stored in a fresh water tank 38 via a water pipe 37 and sent to a fresh water injection pipe 9 via a pump 39.

The sludge stored in the sludge tank 31 is cooled and carried out.

If necessary, dehydrate and process into a cake shape and discard.

It goes without saying that a treatment agent such as a neutralizing agent is selected and used depending on the type of agent contained in the waste liquid. In addition, the first and second water receiving tanks 12.35 are each made in a size that can store the amount of water used in a day, and the intermediate phases 14 and 22.27 are used for each treatment process. The size shall be large enough to allow the waste liquid to stay there for a certain amount of time.

Also. The waste liquid purification process starts when a considerable amount of waste liquid flows into the first water tank 12 during vehicle cleaning work, or starts after the day's cleaning work is completed, and is processed continuously. .

Finished water that is carried away while remaining attached to the vehicle during cleaning work, or that is scattered by brushes and does not enter the drain groove 11, as well as unavoidable loss due to evaporation, is replenished with fresh water sprayed onto windows, etc. , to retain a certain amount of water.

As described above, the present invention eliminates the need to dispose of finishing water used for cleaning work or to collect it separately from the chemical solution and reuse it.
Because it is used by collecting the reaction products of drug grade and dirt together, purifying them, and circulating them as finishing water, only the injection pipes are arranged in parallel, and the other equipment is connected in series. The lines are simplified by creating and arranging them in a single closed circuit. And since all the water is reused without being thrown away, compared to the conventional method of using fresh water as finishing water, the problem of expensive and difficult to obtain clean water is solved and water can be saved significantly. At the same time, water from waste leaves is used in fields, underground water,
This eliminates the inconvenience of water flowing into rivers and causing pollution, and the unavoidable decrease due to cyclic use is supplemented with fresh water used at the end of the cleaning process, so a constant amount of water is always maintained and does not interfere with cleaning. It does not cause any problems, and it can increase the amount of water retained and perform light cleaning.

[Brief explanation of drawings]

Figure 1 is a schematic plan view of the cleaning device, Figure 2 is a schematic side view, and Figure 3 is a schematic plan view of the cleaning device.
The figure is a flow sheet of the purification process. 3.5... Chemical liquid injection pipe, 4.7... Brush, 6... Finishing water injection pipe, 8... Finishing unit. 9... Fresh water injection pipe, 11... Discharge groove, 12... Water receiving tank, 14... Neutralization tank, 22...・Flocculation tank, 27...Sedimentation tank, 31...Sludge tank, 33...Filter,
34...Separator, 35...Water tank. Agent Mutsumi Nozawa Aki 2

Claims (1)

[Claims] After spraying the chemical on the outside of the vehicle, finish water and fresh clean water are sequentially sprayed to wash away the dirt, and the finished water and fresh water are mixed with chemicals, dirt, and their reaction products, and the waste liquid is collected. The purified water is recycled and used as finished water, and at the end of the cleaning process, fresh water is sprayed onto the outside of the vehicle to compensate for the unavoidable decrease in finished water due to circulating use. A method for washing a vehicle, characterized in that: