JPS5855224Y2 - Continuous ventilation fermentation equipment - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a continuous aeration fermentation device.

In recent years, anti-pollution measures have been called for, and air and water pollution prevention measures have been implemented, and there are signs of considerable improvement in air and water quality.

However, these pollutants discharged from industry and households are simply separated from the air and water as solid matter in some way, and this solid matter is generated in large quantities as sludge, which cannot be treated. At present, we are at a loss as to a method.

Currently, most sludge is disposed of by methods such as dumping in open spaces, incineration, and landfill.

However, even with these methods, there is a risk that secondary pollution will occur unless the area is completely pollution-free.

Additionally, there is no place to dispose of incinerated ash, making it difficult to dispose of it.

On the other hand, due to the soaring prices of various resources and oil, there is a strong need for the development of resource-saving and energy-saving technologies.

In order to meet this demand, the purpose of this invention is to provide a continuous aeration fermentation device that can efficiently ferment a large amount of sludge in a short period of time and dry it appropriately.

Below, this invention will be explained in detail based on the illustrated embodiment. 1 is a ventilated endless transfer device for pallets etc. that runs on a guide track 11 attached to the machine frame A; 2 is an upper part of the transfer device 1; A hood is provided so as to cover the interior, and the upper part along the direction of travel is a plurality of small chambers a1. It is divided into a fermentation area B and a drying area C, which are divided into a2...

3 is the small chamber al, a2... in the upper part of the fermentation area B.
A plurality of exhaust gas circulation ducts 1-15, which are connected via branch pipes 4 each equipped with a damper 14, are located at the bottom of the transfer device 1 and have a size corresponding to the small chambers a, a2, etc. of the fermentation area B. This wind box 5 is provided with the small chamber a1 at the bottom of the wind box. a2... and exhaust gas circulation duct 18 via branch pipes 17 installed via dampers 15, respectively.
This duct 18 is connected to the circulation duct 3 via a communication pipe 19 in which a blower 12 is installed.

6 is a wind box provided at the lower part of the transfer device 1 corresponding to the drying area C. This wind box 6 is connected to the dry air generator 7 via a pipe 21 in which a blower 13 and a damper 20 are installed. Dry air from the generator 7 is supplied to the drying area C.

Reference numeral 8 denotes a hopper for supplying recirculated product sludge provided above the starting end of the transfer device 1, 9 a hopper for supplying granulated sludge provided next to the hopper 8 for supplying product sludge, and 10 each small chamber a1° of the fermentation area B. Water adding device with piping a2..., 16 is drying area C
An exhaust pipe provided in the hood 2 corresponding to the hood 2 is connected to a conduit 23 in which a blower 22 is installed.

Next, the operation of the above embodiment will be explained.

The raw material sludge is placed in a mixing granulator (not shown).
~40% is mixed and granulated with the recycled product sludge, and the water content is 5%.
It is supplied to the granulated sludge supply hopper 9 as granulated sludge with a particle size of about 0 to 70% and a particle size of about 1 to 20 mmφ.

Further, a part of the recycled product sludge is supplied to the product sludge supply hopper 8 as a bedding for the fermentation zone B and drying zone C.

Therefore, product sludge is first spread on the transfer device 1 via the hopper 8 to a layer thickness of about 10 to 20 mm, and then granulated sludge is supplied thereon via the hopper 9 to a layer thickness of about 500 to 800 mm.

The sludge supplied onto the transfer device 1 is transferred to the fermentation zone B in the hood 2.
When the sludge enters the sludge, it comes into contact with the circulating fermentation exhaust gas that is sent upward from below through the circulation duct 3, the communication pipe 19, the circulation duct 18, and the wind box 5, and aerobic high-temperature bacteria multiply explosively, resulting in continuous high-temperature fermentation. It is done.

During this fermentation, the sludge is transferred to the small chamber a3 of the fermentation area B by adjusting the amount of exhaust gas supplied by adjusting the opening of the dampers 14 and 15. a
4 Below are the small chambers a, , a2 and a5. Since a larger amount of gas is pumped in and the temperature is raised to a higher temperature than under A6, a fermentation atmosphere is created first in the initial chambers A1 and A2, and then in the middle chambers A3. Approximately 50 ~ under A4
Fermentation is promoted by a large amount of high-temperature exhaust gas that is heated to 60°C and contains moisture, and is almost completely fermented. Under a6, the temperature is again returned to the same level as the initial temperature.

In this way, the sludge is transferred through the fermentation zone B, which has three stages of temperature changes, resulting in more uniform fermentation, faster fermentation, and less uneven fermentation compared to conventional fermentation zones where the sludge is only transferred at the same temperature. becomes possible.

The sludge that has been fermented in fermentation zone B is then transferred to drying zone C.
At this point, the dry air generator 7 contacts the dry air supplied by the blower 13 and is dried to a moisture content of 15% or less.

Note that there are some parts of the sludge that have low moisture content, and fermentation and drying may progress abnormally in such parts.

In such a case, the degree of fermentation will suddenly deteriorate and the temperature (product temperature) will drop, so if necessary, add water to the small chambers a, , a, ... where the degree of fermentation is poor in fermentation area B. Water is sprayed through the device 10.

Then, the degree of fermentation increases again and the temperature of the product rises. Furthermore, when the granulated sludge is supplied onto the transfer device 1, it is supplied onto the reflux product sludge that has been spread on the transfer device 1 as a bedding in advance, so the pallet will not be clogged and the air permeability will be improved. Since it is kept in good condition and pre-fermentation is carried out by air blown from below the transfer device 1 before being transferred to the fermentation zone B, subsequent fermentation can be carried out smoothly.

The granulated sludge dried in the drying zone C is broken into pieces of 1 to 1Q mmφ by a cage-type crusher (not shown) and manufactured into products.

The sludge produced in this way is 1
The remaining portion is packaged and stored except for reflux.

This idea is constructed as described above, so the granulated sludge that has entered the fermentation zone is divided into the initial, middle, and final stages using small chambers and wind boxes, and dampers are installed to keep the middle stage at a higher temperature than the initial and final stages. By adjusting the amount of circulating exhaust gas through the air filter, continuous aerated fermentation is possible, which allows for completely uniform fermentation without uneven fermentation.Moreover, it can be efficiently fermented and composted in a short period of time, dried appropriately, and then packaged. , can be stored for a long time and therefore transported.

Not only is it convenient to handle, but it also enables mechanical fertilization, which can greatly contribute to labor savings in agriculture.

Furthermore, since the exhaust gas is recycled and used to reduce the amount of accumulated exhaust gas, no odor prevention equipment is required and the entire device can be made more compact.

Furthermore, granulated sludge obtained by mixing product sludge with raw material sludge,
Since the product is supplied on top of the product sludge that has been spread on the transfer device as a bedding in advance, clogging of the transfer device can be reliably prevented and the transfer device can be easily circulated at all times. It has excellent effects such as being able to maintain good air permeability.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; FIG. 1 is a schematic diagram, FIG. 2 is a detailed side view, FIG. 3 is a sectional view taken along the line IV--IV in FIG. 2, and FIG. FIG.

Claims (1)

[Scope of utility model registration request] A hopper for supplying product sludge, a hopper for supplying granulated sludge in which raw material sludge and product sludge are mixed and granulated, and a hood are installed in the upper part of the ventilation type endless transfer device in order along the direction of travel. a fermentation area whose upper part is partitioned into a plurality of small chambers and a drying area, and an exhaust gas circulation duct is provided above the fermentation area which communicates with each of the small chambers via a branch pipe each equipped with a damper, An exhaust pipe line equipped with a blower is provided at the top of the dryer, a plurality of wind boxes having a size corresponding to the small chambers of the fermentation area are provided at the bottom of the transfer device, and the wind boxes and the exhaust gas circulation duct are connected to each other. The blower and the wind box are connected through a pipe line with a damper installed in each box, and a wind box of a size corresponding to the dry area is provided, and the dry air is connected to the wind box via a pipe line with a blower and damper installed. A continuous aeration fermentation device characterized by connecting a generator.