JPH09155178A - Washing method of humidification kneader - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] A humidifying and kneading machine capable of completely removing the humidified combustion ashes adhering to the inside of a humidifying and kneading machine for humidifying and kneading combustion ashes having a property of easily adhering and solidifying and shortening a substantial washing time of water. The method of washing with water is provided. SOLUTION: When the humidification kneading machine 10 is stopped for a long time after the operation of the humidification kneading machine 10, the humidification kneading machine 10 is used.
Water is stored inside and the humidified combustion ash attached to the inside of the humidifying and kneading machine 10 is immersed in water. Further, the screw conveyor 14 is rotated in the normal and reverse directions while the humidifying and kneading machine 10 is filled with water. When the immersion is completed, the water is drained from the humidifying and kneading machine 10 and the inner wall surface of the humidifying and kneading machine 10 and the screw conveyor 14 are showered with pressurized water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing method for a humidifying and kneading machine, and in particular, by burning and kneading combustion ash produced by burning heavy oil obtained by emulsifying super heavy oil, the combustion ash is granulated to reduce its volume. The present invention relates to a method of washing a humidifying kneader with water.

[0002]

2. Description of the Related Art Abundant ultra-heavy oil (commonly referred to as Orinoco tar) is buried in a basin called Orinoco Belt located in the northern basin of the Orinoco River in Venezuela, South America. This ultra-heavy oil has the property of solidifying at room temperature, and has a problem in handling. However, recently, a technique for emulsifying orinocotar has been developed, and a problem in handling has been solved, so that it is used as a fuel for thermal power plants and the like.

By the way, in a thermal power plant, powdery combustion ash generated when fuel such as heavy oil is burned is usually collected by an electric dust collector. When the collected combustion ash is transported to a processing plant, it is humidified and kneaded by a humidifying kneader and granulated to be sent in a volume-reduced state, thereby improving transport efficiency. As a humidifying / kneading machine, a screw conveyor having a spray nozzle for humidification is generally used.

[0004] However, powdery combustion ash produced by burning a fuel obtained by emulsifying orinocotal produces heat when humidified and kneaded, and easily solidifies when cooled, and moreover, is sticky in an excessively humidified state. Has a property of being easily adhered and solidified in the casing of the humidifying and kneading machine or on the screw conveyor. This property of the humidified combustion ash is remarkable when the operation of the humidifying and kneading machine is stopped, and for example, if the excessive humidification degree is large, it may adhere and solidify in a short time of about 1 minute. Therefore, when the operation of the humidifying / kneading machine is stopped, the humidified combustion ash adheres to and solidifies on the casing of the humidifying / kneading machine or the screw conveyor, and when the humidifying / kneading machine is operated next time, the screw conveyor does not move. For this reason, as a conventional washing method for a humidifying / kneading machine, after the operation of the humidifying / kneading machine is stopped, water is applied to the inner surface of the casing of the humidifying / kneading machine or the screw conveyor by a hose or the like for hand washing. Further, in the case of a humidifying and kneading machine equipped with an automatic spraying machine, water was sprayed on the inner surface of the casing and the screw conveyor for a certain period of time.

[0005]

However, in the conventional washing method, since the humidified combustion ash adhered to the inner surface of the casing or the screw conveyor is difficult to be separated, the washing operation requires a long time and the adhered humidified combustion ash is completely removed. It has the drawback that it is difficult to remove. Especially when the humidifying kneader is stopped for a long period of time, such as during lunch break or from the end of operation to the start of operation on the next day, leave the humidified combustion ash that has not been peeled off after washing with water on the inside of the casing or screw. It completely adheres to the conveyor, which causes troubles when the humidifying and kneading machine is operated next time.

From this background, when the humidification kneader is stopped for a long time after the operation of the humidification kneader, the humidified combustion ash adhering to the humidification kneader can be completely removed, and the washing operation time can be shortened. A method was requested. The present invention has been made in view of such circumstances, it is possible to completely remove the humidified combustion ash adhered in the humidification kneader for humidifying and kneading the combustion ash having the property of easily adhering and solidifying, and a substantial washing time It is an object of the present invention to provide a method for washing a moistening and kneading machine with water, which can shorten the time.

[0007]

In order to achieve the above-mentioned object, the present invention is to carry out the above-mentioned combustion ash by humidifying and kneading powdery combustion ash produced by burning heavy oil obtained by emulsifying super heavy oil. In the method of washing a humidifying kneader for granulating, the method is characterized in that after the operation of the humidifying kneader is completed, water is stored in the humidifying kneader and the humidified combustion ash attached to the inside of the humidifying kneader is immersed in water. .

According to the present invention, when the humidifying kneader is stopped for a long time after the operation of the humidifying kneader is stopped, water is stored in the humidifying kneader and the humidified combustion ash attached to the humidifying kneader is washed with water. Soak in. By this immersion, the humidified combustion ash attached to the inside of the humidified kneader can be easily separated, so that the humidified combustion ash attached to the inside of the humidified kneader can be easily removed by draining water from the humidifying kneader and then sprinkling it with water. be able to.
As a result, it is possible to significantly reduce the substantial washing time in which the worker is restrained for the washing work.

Further, in a state where water is stored in the humidification kneader,
When the kneading screw is rotated in the forward and reverse directions, the shearing force of water generated by the forward and reverse rotation makes it easier to separate the humidified combustion ash attached to the wall surface and the screw inside the humidifying and kneading machine.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a method of washing a humidifying and kneading machine according to the present invention will be described in detail below with reference to the accompanying drawings. The washing method of the humidifying and kneading machine according to the present invention is, in particular, the washing method of the humidifying and kneading machine for performing the humidifying and kneading of powdery combustion ash produced by burning a fuel obtained by emulsifying an ultra-heavy oil such as orinocotar. Is.

FIG. 1 is a top view showing an example of a humidifying and kneading machine to which the washing method of the present invention is applied, with a top plate removed so that the inside of the humidifying and kneading machine can be seen. FIG. 2 is a vertical sectional view of the humidifying / kneading machine. As shown in these figures, the humidifying and kneading machine 10 includes a cylindrical casing 12 having a flat top plate and a curved bottom, a screw conveyor 14 provided in the casing 12, and a casing 12. It comprises a humidifying means 16 for humidifying the combustion ash conveyed inside and a water washing means 18 for washing the inside of the casing 12 with water.

A supply port 20 for supplying combustion ash is formed on the upper side of one end of the casing 12, and a discharge port 22 for discharging the humidified and kneaded humidified combustion ash from the inside of the casing 12 is formed on the lower side of the other end. A discharge chute 24 is provided at the discharge port 22.
And an on-off valve 26 is provided in the middle of the discharge chute 24. The screw conveyor 14 is composed of a spiral screw blade 28 and a rotating shaft 30 that supports the screw blade 28, and one end of the rotating shaft 30 is supported by a bearing 34 via a gland seal portion 32. On the other hand, the other end of the rotating shaft 30 is supported by a bearing 38 via a gland seal portion 36, and is further connected to a motor 42 via a speed reducer 40. As a result, when the motor 42 is operated, the rotational power is transmitted to the rotary shaft 30, and the combustion ash supplied from the supply port 20 into the casing 12 is kneaded and conveyed to the discharge port 22.

The humidifying means 16 is provided on the supply port 20 side of the casing 12, and sprays a plurality of spray pipes 4 for spraying the combustion ash conveyed by the screw conveyor from above.
4, 44 ..., a plurality of spray pipes 45, 45 for spraying the combustion ash from the side, and a water supply for supplying water to the spray pipes 44, 45 via the spray pipe 46. And device 48. In addition, the spray nozzles 5 for spraying water are provided at the tips of the spray pipes 44, 45.
0, and a spray valve 52 for spraying / stopping spraying and adjusting the spraying amount is provided in the middle of each spraying pipe 44, 45.

The water washing means 18 is the screw conveyor 14
A plurality of washing pipes 5 provided almost all over the
4, 54, ..., and the washing pipe 5 through the washing pipe 56.
4 and a water supply device 48 for supplying water. Further, water washing nozzles 58, 58 for spraying water are provided at the tips of the water washing pipes 54, 54, and spraying / spraying stop and spraying are performed in the middle of the water washing pipes 54, 54. Washing valves 60, 60 ... For adjusting the amount are provided.

Next, the water washing method of the present invention will be described using the humidifying and kneading machine configured as described above. First, the humidifying / kneading machine 10 is operated with the opening / closing valve 26 of the discharging chute 24 connected to the discharging port 22 of the humidifying / kneading machine 10 being opened. The combustion ash supplied to the humidifying and kneading machine 10 is spray pipes 44, 4
While being sprayed with water from No. 5, it is kneaded by the screw conveyor 14 and conveyed to the discharge port 22. Humidification rate for combustion ash (weight of added water / weight of added water + weight of combustion ash)
Is about 25%. As a result, the powdery combustion ash supplied to the humidifying and kneading machine 10 is granulated (average particle size of about 7 mm) and reduced to about 1/5 of the volume of the powdery combustion ash before being humidified. To be done. The volume-reduced humidified combustion ash is filled in a container bag (not shown) having a volume of about 1 m ³ and transported to a processing plant (not shown).

When the operation of the humidification kneader 10 is stopped for a long time, for example, when the operation is stopped overnight until the operation is restarted on the next day, the supply of the combustion ash to the humidification kneader 10 and the humidification are stopped. The humidifying / kneading machine 10 is operated to discharge the humidified combustion ash remaining in the humidifying / kneading machine 10 as much as possible. Next, after closing the opening / closing valve 26 of the discharge chute 24 and opening the valve 60 of the water washing pipe 54 to store water (normal temperature water) in the casing 12, the wall surface of the casing 12 and the screw blades 28 of the screw conveyor 14 are closed. The humidified combustion ash attached to the rotary shaft 30 is immersed in water. The humidified combustion ash attached by this immersion is easily separated from the inner wall surface of the casing 12 or the like. Although the ease of peeling is proportional to the length of the immersion time, when the screw conveyor 14 is rotated in the normal and reverse directions with water stored in the casing 12, the wall force in the casing 12 is generated by the shearing force of the water generated by the normal and reverse rotation. Since the humidified combustion ash attached to the or screw conveyor 14 can be more easily peeled off, the immersion time can be shortened. The forward / reverse rotation of the screw conveyor 14 is 10 to 1
It may be about 5 minutes, and may be performed after the water is poured into the casing 12 and when the water is discharged from the casing 12.

After the completion of the immersion, the opening / closing valve 26 of the discharge chute 24 is opened, the speed reducer 40 is adjusted, and the valve 60 of the water washing pipe 54 is opened while the screw conveyor 14 is slowly rotated. The screw conveyor 14 and the like are rinsed with a water pressure of about 3 to 5 Kg / cm ² to completely wash away the humidified combustion ash attached. Next, hot air is blown into the casing 12 so that the casing 12
After drying the inside and the screw conveyor 14, the opening / closing valve 26 is closed to complete the water washing operation. In the drying operation of the casing 12 and the like, a heater may be provided inside the rotary shaft 30 of the casing 12 or the screw conveyor 14, or heat drying may be performed by passing steam.

In this embodiment, room temperature water is used as the water to be dipped, but warm water may be used. Further, although the example of immersing overnight is described, it is also effective when the moistening and kneading machine is stopped for about 1 hour, such as during lunch break. In addition, in the present embodiment, the screw conveyor-type humidifying and kneading machine is described as an example of continuously supplying and continuously discharging combustion ash, but the washing method of the present invention may be any kneading means, and further a batch-type humidifying and kneading machine. Can also be applied to.

[0019]

As described above, according to the method of washing a humidifying / kneading machine of the present invention, after the operation of the humidifying / kneading machine is completed,
Water is stored in the humidifying kneader, and the humidified combustion ash attached to the humidifying kneader is immersed in water for a predetermined time. In particular, when the humidification kneader is stopped for a long time, the humidified combustion ash adhering to the inside of the humidification kneader can be easily peeled off easily by this dipping operation. The humidified combustion ash adhering to the inside of the humidifying and kneading machine can be easily peeled off by just ringing.

Further, in a state where water is stored in the humidifying and kneading machine,
When the kneading screw is rotated forward and backward, the attached humidified combustion ash is more likely to be peeled off. As a result, since the humidified combustion ash that has adhered can be easily and completely removed, troubles when restarting the operation of the humidifying and kneading machine can be prevented, and the substantial washing time of the worker who is restrained for washing work can be reduced. It can be shortened significantly.

Therefore, it is extremely effective as a water washing method when a humidifying kneader for humidifying and kneading combustion ash produced by burning a fuel emulsified with an ultra-heavy oil such as orinocotar is stopped for a long time.

[Brief description of the drawings]

FIG. 1 is a top view showing an example of a humidifying / kneading machine to which a washing method for a humidifying / kneading machine according to the present invention is applied.

FIG. 2 is a vertical cross-sectional view of the humidifying / kneading machine shown in FIG.

[Explanation of symbols]

 10 ... Humidifying and kneading machine 12 ... Casing 14 ... Screw conveyor 16 ... Humidifying means 18 ... Water washing means 20 ... Supply port 22 ... Discharge port 24 ... Discharge chute 26 ... Open / close valve 42 ... Motor 44, 45 ... Spraying pipe 48 ... Water supply Apparatus 50 ... Nozzle for spraying 54 ... Pipe for washing water 58 ... Nozzle for washing water

Front page continuation (72) Inventor Hiroaki Yabuta 1-1-14 Kanda, Uchikanda, Chiyoda-ku, Tokyo Inside Hirit Plant Construction Co., Ltd. (72) Makoto Ogura 1-1-14 Uchikanda, Chiyoda-ku, Tokyo Sun Stand Plant Construction Co., Ltd.

Claims (2)

[Claims] 1. A method for washing with water in a humidification kneading machine, wherein powdery combustion ash produced by burning heavy oil emulsified with ultra-heavy oil is wet-kneaded to granulate the combustion ash. A method of washing a humidifying kneader, characterized in that after the operation of the kneading machine is completed, water is collected in the humidifying kneader and the humidified combustion ash attached to the humidifying kneader is immersed in water. 2. The washing method for a humidifying and kneading machine according to claim 1, wherein the kneading screw is rotated in the forward and reverse directions while water is stored in the humidifying and kneading machine.