JPS5857645B2 - Combustion ash removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion ash removal device that allows combustion ash from a solid fuel combustion device to be taken out without stopping the operation of the combustion device.

If the solid fuel combustion device is small, it is possible to remove the combustion ash during combustion, but in medium or large-sized devices, the combustion gas becomes high temperature and high pressure, and when trying to remove the combustion ash, the pressure may leak. Because it was dangerous, it was impossible to remove the ash if it was thrown down after the operation was stopped.

Such restrictions obviously narrow the range of applications for solid fuel combustion devices, and are the reason why solid fuel combustion devices cannot be used, for example, in the case of 24-hour operation.

In view of these circumstances, the present invention was made with the aim of providing a device that can remove ash while continuing combustion. An ash falling chamber is provided, and a sealed tank is provided which communicates with this falling chamber through a communication passage at the bottom and is kept at the same pressure as the falling chamber, and the chamber is always filled with water at a certain level.
After the water in this falling chamber is stirred by water discharged from the submersible pump disposed in the sealed tank, the discharged water from the submersible pump is then led to a solid-liquid separator to separate the combustion ash from the falling chamber p and into the sealed tank. The feature is that the water inside is taken out to the outside.

The invention will now be described with reference to illustrated embodiments.

The combustion ash fall chamber 1 is provided below the solid fuel combustion device 2 and communicates with the combustion chamber 3.

The structure of the combustion device 2 does not matter as long as it burns solid fuel, but in this embodiment, a vortex is generated in a horizontally oriented cylindrical combustion chamber, and granular or powdered solid fuel is combusted in the vortex. A type of combustion device is planned in which combustion gas is taken out from a sideways combustion gas take-off pipe 2a.

A partition plate 4 having a triangular cross section is disposed within the combustion ash falling chamber 1 to divide the lower part of the chamber 1 into two chambers IA and IB.

Chamber 1A is located below the combustion chamber 3, and both chambers IA
, IB is kept liquid-tight, and the liquid level is at partition plate 4.
Beyond one end of the chamber, liquid (water) flows between the chambers.

However, a closed tank 5 is provided outside the combustion ash falling chamber 1, and the bottom of this tank 5 and the bottom of the combustion ash falling chamber 1B communicate with each other via a communication passage 6.

Also, the upper part of the drop chamber 1 and the upper part of the sealed tank 5 are the equal pressure pipe 7.
The painting room is always kept at 2 times.

A submersible pump 8, a constant level water supply device 9, and a liquid level detector 10 are provided in the sealed tank 5.

A discharge pipe 11 of the submersible pump 8 exits the closed tank 5 and branches, and one branch pipe 11a is a stirring pipe 12A for the combustion ash falling chambers IA and IB.

12B and the other branch pipe 11b are connected to the sedimentation bag 13, respectively.

Stirring pipe 12A. 12B has a large number of fountain nozzles bored on its circumferential surface, and when water discharged from the submersible pump 8 is injected, the combustion ash and water precipitated in the falling chambers IA and IB are thoroughly stirred.

The sedimentation bag 13 is the simplest type of solid-liquid separator, and a material 15 is placed in a tank 14, and dusty water discharged from a discharge pipe 11.11b is poured onto the P material 15. ,
The water purified by the P material 15 is allowed to flow out from the discharge pipe 16.

The water discharged from the submersible pump 8 is transferred to a branch pipe 11at or 11.
For this purpose, a flow path switching device 17 is provided at the branch portion of the branch pipes 11a and 11b.

This flow path switching device 17 is composed of a known switching valve that allows discharged water to flow to the branch pipe 11a side for a certain period of time immediately after the submersible pump 8 starts operating, and thereafter to flow to the branch pipe 1ib side.

The constant level water supply device 9 is configured to open and close an on-off valve 20 of a water supply pipe 19 using a float 18 that moves up and down depending on the liquid level.
and regulates the maximum water level supplied into the combustion ash fall chamber 1.

This high water level H is higher than the upper end position of the partition plate 4 in the drop chamber 1.

Further, when the water level in the sealed tank 5 is lower than a certain value by the submersible pump 8, the liquid level detector 10 detects this using the float 21 and issues a signal to stop the operation of the submersible pump 8.

Although it is of course possible to give the operation start (p and stop) signal for the submersible pump 8 at the discretion of the operator, it is preferable to start operation periodically using the timer 22 for automatic operation.

In this apparatus having the above-mentioned configuration, combustion ash produced by combustion of the solid fuel heated in the combustion device 2 falls into water in the chamber 1 maintained at a high water level.

As the combustion continues, it not only dissolves into the water in chamber 1, but also forms a deposit on the water surface.

When the submersible pump 8 is driven by the timer 22 in such a state, the discharged water is first transferred to the stirring pipe 12 via the discharge pipe 11, the flow path switching device 17p and the branch pipe 11a.
A and 12B and is injected from the injection nozzle into the chamber 1A1B, so that the water p and combustion ash in the chambers IA and IB are stirred and mixed.

Since the water level is higher than the upper end of the partition plate 4 between chambers IA and IB, this agitation and mixing is carried out between the compartments, especially from the 1-person side of the chamber where there is a lot of ash, which is directly below the combustion chamber 3, to the chamber 1B side. Water containing ash moves.

Next, the flow path switching device 17 causes the discharge water of the submersible pump 8 to flow to the branch pipe 11b side, and when water containing ash is supplied onto the evaluation material 15 of the sedimentation bag 13, the closed tank 5 and the communication path with the tank are connected. 6, the water level in the combustion ash falling chamber 1, which is communicated with, decreases, and finally the liquid level detector 10 stops the operation of the submersible pump 8.

The combustion ash is taken out along with water.

During this time, the water level in the combustion ash fall chamber 1B side decreases as the water level in the tank 5 decreases, but since one person in the chamber is separated from the chamber 1B by the partition plate 4, the water level for one person in the chamber is lower than the one in the partition plate 4.
It cannot fall below the upper limit of .

Therefore, even while the submersible pump 8 is in operation, the combustion ash from the combustion device 2 can be reliably captured in the water in the chamber 1A.

When the submersible pump 8 stops, the float 1 is already
8 opens the on-off valve 20 and starts supplying water into the closed tank 5 through the water supply pipe 19, so water is eventually supplied into the closed tank 5 and the combustion ash falling chamber 1 up to the initial high water level H. be done.

Therefore, after a certain period of time, the combustion ash can be removed by the same operation as above.

The dusty water supplied onto the slag material 15 of the p-sedimentation bag 13 is drained from the discharge pipe 16 after the ash is separated by the reactor water 15.

The combustion ashes on the lint 15 can be appropriately removed later.

Water may be supplied into the closed tank 5 from the water supply pipe 19 while flowing the water discharged from the submersible pump 8 into the branch pipe 11b.

In the above embodiment, the combustion ash falling chamber 1 is divided into two parts so that water is always present in one of the chambers, so that the combustion ash can be reliably trapped in the water even during the combustion ash removal operation. An advantage is that it is possible to automatically remove combustion ash without having to divide the system into two units.

In addition, the operation of the submersible pump can be started and stopped by manual operation.
Other devices can be used.

In summary, the present invention allows combustion ash generated in a combustion chamber to fall into water in a falling chamber, and the water containing this combustion ash is stirred and mixed by water discharged from a submersible pump disposed in a sealed tank communicating with the falling chamber. After that, water is introduced to an external solid-liquid separator by the submersible pump, and water is then supplied to the falling chamber p and the closed tank again to a certain level, so the above operation is not determined. By repeating this every hour, the combustion ash can be removed without stopping the combustion of the combustion device.

Therefore, the solid fuel combustion device can be operated for 24 hours, and its practicality can be improved.

Further, according to the invention of this application, during the first submersible pump operation, the supply water passes through the branch pipe 11a to the stirring pipe 1 of the chamber 1A.
The combustion ash that is injected from the stirring pipes 12B of the chambers 2A and 1B and falling from the combustion chamber is first mixed with water by the stirring pipes 12A, and then the mixing is repeated by the stirring pipes 12B, and this mixed water is passed through the communication pipe 6 and sealed. It enters the tank 5, is sucked into the submersible pump 8, and is circulated through the pump's discharge pipe 11 to the branch pipe 11a, but this circulation mixing circuit is repeated again, so that the combustion ash and water are continuously completely removed. After being mixed, by switching the flow path switching device 17, the mixed water enters the settling tank 13 from the branch pipe 11b, the combustion ash and water are separated, and the combustion ash is taken out.

Even if combustion ash falls and accumulates in the falling chamber from the combustion chamber during this combustion ash removal process, sufficient mixing is achieved in the next stirring and mixing process, so the continuous operation of the furnace prevents the combustion ash from falling continuously. It is also possible to dispose of ash sufficiently.

Therefore, according to the present invention, the mixing efficiency of water and combustion ash is extremely high, and there is no need for a special device for improving the mixing state or the power required for it, so that cost and power can be saved.

In addition, since there is no need to replenish water to circulate the above mixed water, the amount of water sent to the combustion ash removal device is within the capacity of the pump, and there is no need to use other pumps, saving power and replenishment water. It is economically advantageous.

[Brief explanation of drawings]

The figures show an embodiment of the combustion ash removal device according to the present invention, and FIG. 1 is a longitudinal cross-sectional view of the combustion chamber and combustion ash falling chamber of the combustion device, and FIG. 2 shows the combustion ash falling chamber and the sealed tank p. FIG. 1... Combustion ash fall chamber, 2... Solid fuel combustion device, 3
... Combustion chamber, 4... Partition plate, 5... Sealed tank,
6... Communication path, 7... Equal pressure pipe, 8... Submersible pump, 9... Hole level water supply device, 10... Liquid level detector, 11... Discharge pipe, 11a, 1 l b = Branch pipe, 12A, 12B... Stirring pipe, 13... Sedimentation bag, 17... Channel switching device, 21... Timer.

Claims (1)

[Claims] 1 Pass two stirring pipes in the front and back inside the combustion ash falling chamber, and place the upper part of one stirring pipe facing below the solid fuel combustion chamber, and connect the bottom of the chamber on the side where the other stirring pipe is located to the closed tank. The closed tank is connected to the upper part of the above-mentioned drop chamber by an equal pressure pipe, and the closed tank is equipped with a constant level water supply device and a submersible pump, and the discharge pipe of the submersible pump is equipped with a branch pipe connected to the stirring pipe and solid-liquid separation. A branch pipe connected to the device is provided, and a flow path switching device is installed at the branch position to supply water to the stirring pipe for a certain period of time after the pump starts operating, and then switch to the solid-liquid separation device to supply water. Characteristic combustion ash removal device.