JP2000051898A - Film-like sludge dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dryer which requires a short drying time, can save space, can be small-sized, and gives dried products usable in a wide range by sufficiently dewatering objects to be dried attached to a net by a compression dewatering mechanism and drying the objects in the form of a film having a small drying depth. SOLUTION: A resin-made net 1 with sludge attached thereto is conveyed by many sending rollers 18 so that it goes around until the completion of drying. First, wastewater with floating sludge is supplied at a supply port 2 for materials to be treated, and sludge deposited on the meshes of a net 5 is compressed and dewatered together with the net 5 by compression rollers 4. Next, the conveying speed is controlled so that the drying is completed during the tour through a heat-generation evaporation chamber 15, and thus the drying of the sludge deposited on the net 1 is completed. Then, the dried hard sludge tightly adhering to the meshes of the net is scraped down by the swinging from side to side at a roller 10 and by the scraping with a roller brush 8. Thus, the dried sludge falls through a dried sludge take-out port 12 and is collected in a dried sludge receptacle 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the treatment of waste generated in food processing and the like, and is an apparatus for recovering contained fertilizers or components as feed, and effectively utilizing resources together with the treatment.

[0002]

2. Description of the Related Art Many wastes are highly viscous and difficult to filter and dehydrate, and because of their high moisture transfer resistance, drying is extremely difficult. Therefore, a large amount of energy is required for drying and incineration. Was. Even if it dries, it costs a lot of money for effective use. For this reason, conventionally, there are many places that are generally dumped in wasteland, etc., and in places where the environment is considered in public facilities, etc.
They were incinerated or converted into cornpost and returned to green farmland. However, all of these resources are difficult to dry, and when they are dried, they harden and become a lump, making it difficult to use them. For this reason, storage costs and transportation costs are unexpectedly expensive, the effective use range is limited, and there is a tendency that the storage is not utilized gradually. Recently, bacterial treatments have been attempted, but these treatments take a lot of space and time,
For this reason, utilization places are restricted.

[0003]

SUMMARY OF THE INVENTION Waste treatment does not involve direct production and is ineffective. Therefore, in order to recover resources, it is a necessary condition that the processing can be performed with low cost.
For this purpose, to reduce the cost of processing, storage and transportation after processing, dry processing is carried out immediately after it occurs on site,
To reduce the volume, increase the value of fertilizers and feeds in order to sort out processed foods, expand demand, and sell them immediately. In addition, it is necessary that these processes do not affect the environment, such as generation of offensive odor and dust, and that the facilities be simple equipment for automatically performing these operations.

[0004]

According to the present invention, a small-volume compression dewatering mechanism is provided to reduce the energy consumption for drying, and sufficient dehydration is performed. To shorten the drying time, a large drying surface is used. The idea was to form a film with a shallow depth. A substrate is needed to hold the film-like dried product, and we focused on the use of a net required in the filtration process. According to this, filtration and dehydration operations which are indispensable before drying are naturally performed, and an expected quick drying device is formed.

[0005]

[Action] Sludge with a large amount of water requires filtration first, but sludge with high viscosity may cause clogging in the network during this filtration process. Use and sufficient dehydration did not progress, and there were many troubles. However, in the present invention, it is necessary to attach the suspended matter to the mesh, and the adhered suspended matter is mechanically dropped after drying and is used repeatedly, so that this problem can be solved naturally. Although compression is required to attach the sludge to the mesh, sufficient dewatering is naturally performed in this step, and the conventional dehydration step is not required.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail with reference to the drawings. In this embodiment, sludge of a food factory is dried to recover contained resources. Sludge is a mixture of a large amount of starchy sap and excess activated sludge, large solid residues have already been removed, and sludge floating in water takes in what has been condensed by a condensing agent. Therefore, in order to use this embodiment in a cafeteria or the like, it is necessary to separately transport the garbage from the apparatus to the apparatus of the present invention separately from this apparatus.

[0007] 1, the sludge adhered, 5 was peeled off, all are the same endless resin nets, many by 18 feed rollers to make a round when the drying is completed Sent. 2. At the feed port of the raw material for the drying of the sludge, the sewage in which the sludge floats is supplied, the water passes through, and the sludge hangs on 5. 3 is a frame that surrounds suspended sludge so as not to be scattered. Sewage supply is controlled by detecting the amount of accumulation. Reference numeral 4 denotes a compression roller for compressing sludge accumulated in the mesh together with the net 5. In this case, the sludge is compressed to a predetermined thickness and becomes 1, but if excess occurs,
3 will accumulate. 6. The drain catches the water filtered by 5, and the water generated by the compression, leading to drainage. Reference numeral 7 denotes a fixed feed roller which feeds at a specified speed while strongly sandwiching 5 to prevent deformation. 8, 9, 1
Reference numerals 0 and 11 denote rollers for peeling off the dried material as described later. 1 that passed here changes to 5.
Reference numeral 12 denotes a stripped-out dried-out material take-out port, which receives the dried-product receiving tank 13. Reference numeral 14 denotes a heating element, which is a heat source of the heat generation evaporation chamber of 15. 16. Correct the looseness of 1 with tension roller. Reference numeral 17 denotes a humidity detector which controls the feeding speed so that drying is completed in one cycle.

[0008] The compression roller 4 compresses the sludge and 5, together, and attaches the sludge to 5, but in this case, it adheres also to 4 and the adhesion to 5 may come off. In order to prevent this, the feed of 5 is made slower than the surface speed of 4. This ensures adhesion to the substrate net 5.
The feed of 5 is performed by 7.

The sludge adhering to the net is hardened and it is difficult to remove the sludge. The method of the present invention will be described with reference to FIG. The sludge adhering to 1 has already been dried. 9,
Reference numeral 11 denotes a fixed feed roller which is fed at a specified speed.
The roller 10 is also the same fixed feed roller, but is fed while swinging left and right as shown by the arrow in the figure.
Will be deformed. However, the dried product that adheres to the mesh firmly and hardens cannot be deformed, and eventually the dried product flips off. However, some dry matter, such as long fibers, is scraped off by a brush. The dried matter dropped in this way falls from the dried material take-out port 12 and is collected by the dried material receiver.

A heating element 14 is provided between the heating elements 1 and 1 so as to utilize the space and to make the heating uniform and enhance the heating effect. In this embodiment, a far-infrared radiation plate made of ceramics is used. Reference numeral 15 denotes a heating and evaporating chamber, and a cooling and condensing chamber 21 is provided in parallel on both sides thereof. Although the two chambers are insulated, openings are provided at the top and bottom to allow air flow. 15, the chamber is heated by the heating element 14,
The air inside rises with the steam generated from the sludge. The air that has reached the upper part flows out of the opening into the cooling condensation chambers 20 on both sides. There are 20 and 19 cooling pipes in the chamber, and the generated steam is cooled and condensed here, and the radiated and cooled air descends and flows again into the chamber. As described above, an airflow is generated due to a difference in temperature, and circulates to dry by evaporation and condensation. Since the humidity decreases as the drying proceeds, it is divided into three parts, and each is performed under appropriate conditions. In this embodiment, the influence of the bad odor is avoided and the air is isolated. However, when there is no influence on the environment such as the generation of the bad odor, 20 is introduced into the air, the air is introduced from the lower part and discharged from the upper part. This choice is important because the heat source of the heating element 7 consumes the most energy. Since the present invention does not require a high temperature, utilization of cogeneration, hot drainage of diesel, and the like can be achieved. If a heat pump is used, the equipment cost will be high, but the coefficient of performance will be high, energy consumption will be low, and operation and maintenance will be easy. In the present embodiment, the use of this power was attempted because the power of late-night power has recently become significantly cheaper.

[0011]

According to the present invention, the conventional troublesome filtration and dehydration steps become unnecessary. Since the dried product forms a thin film, the drying proceeds from both sides, and the drying is completed in a short time. Therefore, there is no need to raise the drying temperature, and the amount of heat and the amount of heat loss are small. Since drying can be performed in a short time, the space is small and the apparatus can be downsized. After the drying is completed, the dried product becomes extremely thin, so that it can be easily transported and stored, and has a wide range of local applications. In terms of resource utilization,
Since the product is thin and fine powder, it is easy to process and has a wide range of applications. Since drying is performed using an air current, no power is required to generate the air current, and the floor area is reduced and the height is increased, so that the floor surface can be effectively used. Since the network can be operated endlessly, it can be automated and operation costs can be reduced.
Because high temperature is not required, use of hot drainage such as diesel
If you do not restrict the time, you can use electricity at midnight,
Cheaper rates apply. Since the temperature is low, the net may be made of a resin, and has excellent flexibility, excellent operability and abrasion, light weight and a simple structure of the apparatus. {10} The dried material is not degraded due to low-temperature drying, preserves components as fertilizer and feed, and can recover resources by active treatment. ▲ 11
▼ Furthermore, the generated steam is condensed and drained, so no odor or dust is generated.

[0012]

[Brief description of the drawings]

FIG. 1 is an explanatory view of a cross section of a side of a drying device of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory view of a portion of the drying device of the present invention for removing a dried product.

[Explanation of symbols]

 1, net (sludge is attached) 2, raw material supply port (sewage) 3, sludge accumulation frame 4, compression roller 5, net (sludge is dropped) 6, drainage 7, fixed feed roller 8 , Roller brush 9, fixed feed roller 10, left and right swing roller 11, fixed feed roller 12, dried material take-out port 13, dried material receiver 14, heating element 15, heating evaporation chamber 16, tension roller 17, humidity detector 18, feed roller 19, cooling water pipe 20, cooling condensing chamber

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 33/58 B01D 33/36 B30B 9/24 F26B 13/14 F term (Reference) 3L113 AA08 AB06 AB09 AC10 AC19 AC21 AC31 AC45 AC46 AC48 AC49 AC54 AC62 AC64 AC79 BA37 CA05 CA09 CA11 DA02 DA05 DA06 DA08 DA10 DA13 DA14 DA17 DA24 DA26 4D026 BA03 BB05 BC13 BD02 BD05 BE06 BF12 BF15 BF18 4D059 AA07 BD11 BD26 BE17 CB27 CC01 CC02 CC02

Claims (4)

[Claims] 1. A film-type dry sludge drying apparatus for drying and drying a dried product adhering to a net (5) with a compression roller (4) together with (5), and drying the film as a film. 2. The moving speed of the surface of the compression roller (4) is
Compression roller (4), faster than the moving speed of the net (5)
2. A film-like sludge drying apparatus according to claim 1, which prevents adhesion of dried matter to the surface of the sludge. 3. The dried material adhered to the net (1) and dried is fixedly fed to the rollers (9), (10) and (1) as shown in FIG.
2. The method according to claim 1, wherein the mesh is deformed and the dried material is flipped off by, for example, shaking the pinch (10) right and left in 1).
Alternatively, the film-like sludge drying apparatus according to item 2. 4. A cooling and condensing chamber (21) is provided in parallel with the heating and evaporating chamber (15), and the space between the cooling and condensing chamber (21) is insulated, and an opening communicating with both chambers is provided at an upper part and a lower part. Claims 1 or 2 wherein drying is performed by
Item or the film-like sludge drying device according to Item 3.