JPS58164843A - Moving type dehydration car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile dewatering unit suitable for dewatering sludge generated in a sewage treatment plant, particularly a large number of dispersed small-scale sewage treatment plants.

Traditionally, sewage treatment in Japan has been centered on large cities, where a large amount of water is processed, and therefore a large amount of sludge is generated, so it is common practice to permanently install a sludge dewatering machine at each treatment plant to dewater the sludge.

However, recently there has been a trend to spread sewerage systems not only in large cities but also in small cities and villages in rural areas. In this small city, the amount of treated water generated is small, and therefore the amount of sludge generated is also small. In general, the amount of sludge generated per day in a small-scale sewage treatment plant that serves 200 to 1,000 people is 0.1 to 2. It is sufficient to perform dehydration treatment once every two weeks, and there is no need to install permanent dehydration equipment like treatment plants in large cities. When installing dewatering equipment at a small-scale sewage treatment plant, it is necessary to always have spare equipment and repair parts for the dehydrator on hand, and in terms of operation and maintenance, it is necessary to have workers on site or on patrol. In addition to increasing costs, the dehydrator is the place where the most foul odors are generated, so equipment to prevent this foul odor is required, and small-scale treatment plants are equipped with such equipment. Doing so would be a huge financial burden.

Therefore, in areas where such small-scale sewage treatment plants are installed in a dispersed manner, it is more economical to treat the sludge generated at each treatment plant by periodically visiting each sewage treatment plant using a #dynamic sludge dehydrator. In addition, the flocculant used when processing with this method is a polymer flocculant with a small amount of lids, and considering the dewatering performance and the adjustment of the dewatering machine depending on the difference in sludge, belt press type is recommended. Although a dehydrator is advantageous, Maki's dehydrator requires a large space and has the disadvantage of being heavy.For this reason, a small test machine with a small processing capacity was used for a large truck of 8 tons or more. It is only used by being mounted on a loading platform.
Even in small-scale treatment plants, this belt press type dehydrator has low processing capacity and takes a long time to process, and a large amount of washing water is used to wash the P fabric. It would be difficult to do that, and the missing amount would have to be loaded onto a truck, which would result in a heavy load as mentioned above.
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The present invention is installed on a truck that can be driven by a long-term driver's license, such as belt, press type dehydration mt, and the above-mentioned method by circulating and reusing the washing water that is required for a large amount of time. In addition, the drive source for the pump, dehydrator, etc. is hydraulically powered by the vehicle's engine, eliminating the need for an external power supply, making sludge treatment possible even in treatment plants without power supply equipment. It is something.

The present invention will be explained below based on illustrated embodiments.

In the figure, 0 is a regular truck that can be driven with a regular driver's license, and this truck is equipped with all the equipment necessary for sludge dewatering. This dewatering apparatus is constructed as shown in FIG.

That is, the sludge collected from the sewage treatment plant is supplied to the line mixer 3 by the sludge pump 1. At this time, a cationic polymer flocculant and an anionic or nonionic polymer flocculant stored in chemical tanks 5a and 5b are stored before and after the line mixer 3, and a chemical inlet connected to each chemical tank is used. It is added by pumps 2a and 2b, but □1 is flocculation, which is most suitable for sludge.

The amount of resin added is determined so that the After adding the flocculant, the mixture is rapidly stirred in the line mixer 3 and then supplied to the pretreatment drum 4.

This pre-treatment drum 4 has an outer cylinder that is a 40 to 80-mesh all-mesh drum shape and serves as a concentration tank, and an inner part that is a double type coagulation and mixing tank. J), and slow stirring is performed in the coagulation mixing section 4a of this pre-treatment drum, where the sludge to which the flocculant has been added, supplied into the drum, is solidified and compacted. A floc is formed, which is then concentrated to 5 to 7% in the concentrating section 4b, and then supplied to the next dehydrator 6.

This dehydrator consists of two endless pieces of P cloth 6a and 6b.
They are placed along each other and bent many times to be guided by a group of rollers so that the water can be dehydrated, and then they are strongly pressed between the nine cloth cloths to achieve the desired dehydration. . Wedge-shaped pressurized dehydration s4 of two p cloths 6a and 6b
When sludge is supplied from the concentration section of the pre-treatment drum in the dewatering section 6, this endless belt-like cloth is driven.
The flocs are dehydrated to 8 to 15% at 0, and the flocs form a plate-like shape that is tightly bonded to each other.Then, the flocs are further pressurized and dehydrated in the subsequent field pressurizing section 6d. Exhaust heat from the truck's engine is introduced into any one of these roller pressure parts or into the pressure roller 7 (one or more) on the rear side, and the exhaust heat is used to heat the roller to 40 to 100°C. The moisture of the cake that has been pressurized and dehydrated using a pressure roller is further dehydrated. In this way, the cake after dehydration is made into an endless belt-like F cloth 6a.
, 6'b are discharged through the open discharge part 6e, and put into the dehydrating cake hopper 8 where it is temporarily stored. Also, the P cloths 6a and 6b of the dehydrating machine are cleaned after washing [9a attached to the dehydrating machine]. , 9b, and the washing water and desorbed water after washing are collected and received in a hopper 90, and returned to the υ pretreatment drum by the circulation pump 10, and then sent to the washing water regeneration section 40 of the drum. After adjusting the water to 88,711 degrees and 200 my/min, the water is stored in the wash water tank 11. The cleaning water in the cleaning water tank 11 is washed by the cleaning water pump 12 at @9a.

The water is supplied to the washing water tank 11 and reused for washing the cloth, but the water separated by dewatering the sludge and the amount increased by the added flocculant are transferred to the washing water tank 11.

However, in this case, SS 6 degrees 200 my/
The flocculant used in the dewatering device of the present invention is purified in a chemical tank using water supplied from the treatment plant, so that it does not impair the functionality of the treatment plant. It is something that is dissolved in concentration.

All of the above-mentioned dewatering equipment is constructed entirely in a casing (
This equipment is covered with a cover (made of aluminum, etc.) or a hood to prevent the bad odor generated during sludge dehydration from escaping outside the dehydration vehicle. It is also possible to use internal air to supply it to the engine and burn it to deodorize it.

Figures 2 and 3 are illustrations of one embodiment of the present invention and are valid) 1
Loaded with lli 1 m belt press, processing capacity 5
In consideration of heat conduction, weight reduction, and corrosion resistance of the heating p-ra, the main parts are made of corrosion-resistant aluminum, the dehydrated cake carrying capacity is approximately 1 ton, and it is mounted on a truck that can be driven with a regular driver's license. There is.

In addition, the drive of the dehydrator's belt and other pumps are fully hydraulic, using a vehicle engine, making it possible to dewater sludge even in treatment plants without power supply equipment. According to the present invention, the sludge produced at each sewage treatment plant can be economically and efficiently dehydrated in a short time by visiting the sewage treatment plants of the small-scale division type. Since the two-component agent is added in the process, the dehydration rate is improved, and since the exhaust heat of the engine is used to perform dehydration in the door cloth and further dehydration, the water richness of the dehydrated cake is lower than that of the conventional method. Since it is equipped with a hopper to transport this dehydrated cake for disposal, it has many advantages such as eliminating the need for other dump trucks and eliminating the need for dewatering equipment at each sewage treatment plant.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the sludge dewatering process according to the present invention;
Figure 2 is a front view of the embodiment, and Figure 3 is a plan view of the same. 0...Tracked...Sludge feed pumps 2a, 2b...Chemical injection pump 3...Line mixer 4...Pretreatment drum 4a...Coagulation mixing section 4b...Concentration section 40... Cleaning water regeneration section 5a, 51)... Chemical tank 6... Dehydrator 6F1.6b... P cloth 60... Wedge-shaped pressure section 6d... Roller pressure section 6e... Discharge section 7...Heating roller 8...Dehydrated cake hoppers 9a, 9b...Cleaning device 90...Hopper 10...Circulation pump 11...Washing water tank 12...Washing water pump +, +Jl Outside 1 person

Claims (2)

[Claims] (1) Pumps necessary for dehydration work such as mud supply and P cloth cleaning, 2.
Four chemical dosing devices, a line mixer, a pretreatment device consisting of a flocculation mixing section, a concentration section, and a washing water regeneration section for P cloth, a belt press type dehydrator with a heating section, and a dehydration cake hopper are all loaded on the vehicle. A mobile dehydration vehicle characterized by being driven using an engine. (2) The mobile dehydration vehicle according to claim 1, wherein the mobile dehydration vehicle is a truck that can be driven with a regular driver's license.