JP4800521B2 - Degassing device for pump equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a degassing device for pump equipment used for transporting dewatered sludge and the like in a sewage treatment plant and a human waste treatment plant.
[0002]
[Prior art]
Conventionally , pump equipment equipped with a screw feeder has been used for transporting dewatered sludge and the like in sewage treatment plants and human waste treatment plants. For example, in a pump facility for transporting dewatered sludge such as a sewage treatment plant and a human waste treatment plant, as shown in FIG. 2, a pump for supplying dehydrated sludge 3 to a piston pump 1 and a hopper 2 of the piston pump 1 A feeder 4, an input chute 5 and an input feeder 6 for supplying the dewatered sludge 3 to the pump feeder 4 are provided.
[0003]
The dehydrated sludge 3, which is a low fluidity liquid, is supplied from the input feeder 6 through the input chute 5 to the pump feeder 4, transported by the pump feeder 4, and supplied to the hopper 2. The dewatered sludge 3 in the hopper 2 is sucked into the pump cylinder 8 by the reciprocating motion of the piston 7 of the piston pump 1 and then discharged by pressure.
The pump feeder 4 is a screw feeder.
[0004]
The dewatered sludge 3 such as a sewage treatment plant and a human waste treatment plant often contains a large amount of gas. In particular, when the storage hopper 9 is provided in the front stage of the input feeder 6 so as to store the dehydrated sludge 3, the dehydrated sludge 3 is decomposed by microorganisms inside even while being stored in the storage hopper 9. Therefore, a particularly large amount of gas is included.
[0005]
When the dehydrated sludge 3 containing a large amount of gas is transported by the pump feeder 4 and supplied to the hopper 2 of the piston pump 1, the gas contained in the dehydrated sludge 3 is gradually separated on the discharge side of the pump feeder 4. Accumulate. If a gas reservoir G in which a large amount of gas is accumulated on the discharge side of the pump feeder 4 is formed, the pump feeder 4 cannot exhibit its original ability.
[0006]
Therefore, as shown in FIG. 3, a gas vent valve 10 and a gas vent pipe 11 are provided on the discharge side of the pump feeder 4, and the gas in the gas reservoir G accumulated by venting the gas vent valve 10 is opened. There is. This degasser can initially discharge the accumulated gas.
However, once the gas is vented, the dewatered sludge 3 is clogged in the gas vent valve 10 and the gas vent pipe 11, and thereafter, the dewatered sludge 3 clogged in the gas vent valve 10 and the gas vent pipe 11 every time the gas is vented. If the gas is not removed and cleaned, there is a problem that the degassing operation cannot be performed.
[0007]
[Problems to be solved by the invention]
The present invention solves the above-mentioned problem in the degassing device of a pump facility that transports a low-flowing liquid containing gas, and it is necessary to clean the degassing valve and the degassing piping every time the degassing operation is performed It aims at providing the degassing apparatus of the pump installation which can discharge | emit gas automatically from the inside of a screw feeder.
[0008]
[Means for Solving the Problems]
A degassing device for a pump facility according to the present invention includes a piston pump, a screw feeder that pumps the dewatered sludge to a hopper of the piston pump, and a screw feeder used in pump equipment and a input chute for charging the dehydrated sludge, a degassing device for discharging the gas accumulated in the interior of said hopper, between said hopper and said screw feeder dewatered sludge with a casing which is erected vertically upward so as to communicate with the space, provided in the casing, the always rotate in the pushing direction at the time of actuation of the screw feeder to permit discharge of the gas to the outside It solves the problem by having a venting screw which prevents the outflow.
[0009]
This degassing device always rotates the degassing screw in the pushing direction during operation of the screw feeder, and the casing communicates with the inside of the screw feeder, so when dehydrated sludge containing gas is transported by the screw feeder. When the gas contained in the dewatered sludge is separated and accumulated, the accumulated gas is discharged to the outside through the clearance of the degassing screw. Therefore, a situation in which a large amount of gas is accumulated on the discharge side of the screw feeder and the capability of the screw feeder is significantly reduced does not occur.
[0010]
At this time, since the dehydrated sludge is always pushed from the degassing device side to the discharge side of the screw feeder , the outflow of the dehydrated sludge to the outside is prevented. In this way, degassing is performed automatically, and there is no need for troublesome degassing operations such as periodically cleaning the degassing valve and the degassing piping and opening and closing the degassing valve. Degassing becomes extremely easy.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a configuration diagram of pump equipment for transporting dewatered sludge using a screw feeder equipped with a gas venting apparatus as an embodiment of the present invention as a pump feeder.
Here, the basic configuration of the pump equipment is the same as the conventional one shown in FIG. 2, and includes a piston pump 1, a pump feeder 4 for supplying dehydrated sludge 3 to the hopper 2 of the piston pump 1, An input chute 5 and an input feeder 6 for supplying the dewatered sludge 3 to the pump feeder 4 are provided. A storage hopper 9 is provided in front of the input feeder 6.
[0012]
The dewatered sludge 3, which is a low fluidity liquid, is supplied from the input feeder 6 through the input chute 5 to the pump feeder 4, transported by the pump feeder 4, and supplied to the hopper 2. The dewatered sludge 3 in the hopper 2 is sucked into the pump cylinder 8 by the reciprocating motion of the piston 7 of the piston pump 1 and then discharged by pressure. The pump feeder 4 is a screw feeder.
[0013]
Since the storage hopper 9 is provided in the front stage of the input feeder 6 so as to store the dehydrated sludge 3, the dehydrated sludge 3 is decomposed by microorganisms inside even while being stored in the storage hopper 9. A large amount of gas is contained.
When the dehydrated sludge 3 containing a large amount of gas is transported by the pump feeder 4 and supplied to the hopper 2 of the piston pump 1, the gas contained in the dehydrated sludge 3 is gradually separated on the discharge side of the pump feeder 4. Accumulate. If a large amount of gas is accumulated on the discharge side of the pump feeder 4, the pump feeder 4 can no longer exhibit its original capability, and therefore a gas venting device for discharging the gas accumulated on the discharge side of the pump feeder 4. 20 is provided.
[0014]
The degassing device 20 is provided with a degassing screw 23 that is rotationally driven by a drive unit 22 in a casing 21 that is vertically arranged to communicate with the inside of the pump feeder 4. The number of turns of the screw of the gas vent screw 23 is set in advance so that the pushing pressure when rotating in the pushing direction is larger than the discharge side pressure of the pump feeder 4. A gas vent pipe 24 for discharging gas to the outside is connected to the upper end of the casing 21.
[0015]
The degassing device 20 always rotates the degassing screw 23 in the pushing direction when the pump feeder 4 is operated. Since the casing 21 communicates with the inside on the discharge side of the pump feeder 4, the gas contained in the dewatered sludge 3 is separated and accumulated when the dehydrated sludge 3 containing gas is transported by the pump feeder 4. Then, the accumulated gas passes through the clearance of the gas vent screw 23 and is discharged from the gas vent pipe 24 to the outside.
[0016]
When the gas is released, the original pressure is applied to the discharge side of the pump feeder 4, and the dewatered sludge 3 tries to enter the casing 21 of the degassing device 20, but the pushing pressure of the degassing screw 23 is Since the pressure is set to be larger than the discharge side pressure of the pump feeder 4, the dewatered sludge 3 does not flow out from the gas vent pipe 24 to the outside.
[0017]
When the gas contained in the dewatered sludge 3 is separated and accumulated again, the dewatered sludge 3 contained in the casing 21 is pushed to the pump feeder 4 side by the degassing screw 23 and the inside of the casing 21 is empty. The accumulated gas passes through the clearance of the gas vent screw 23 and is discharged from the gas vent pipe 24 to the outside.
In the degassing device 20, the degassing is automatically performed as described above, and the degassing valve and the degassing piping are periodically cleaned as in the conventional degassing device, and the degassing valve is opened and closed. A troublesome degassing operation such as performing is unnecessary, and degassing is extremely easy.
[0018]
【The invention's effect】
As described above, according to the degassing device for the screw feeder of the present invention, it is not necessary to clean the degassing valve or the degassing pipe every time the degassing operation is performed, and the gas is automatically discharged from the screw feeder. can do.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of pump equipment for transporting dewatered sludge using a screw feeder equipped with a gas venting apparatus as an embodiment of the present invention as a pump feeder.
FIG. 2 is a configuration diagram of pump equipment for transporting dewatered sludge using a conventional screw feeder as a pump feeder.
FIG. 3 is a configuration diagram of pump equipment for transporting dewatered sludge using a screw feeder equipped with a conventional gas venting device as a pump feeder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Piston pump 2 Hopper 3 Dehydrated sludge 4 Pump feeder 5 Input chute 6 Input feeder 7 Piston 8 Pump cylinder 9 Storage hopper 20 Degassing device 21 Casing 22 Drive machine 23 Degassing screw 24 Degassing pipe

Claims (1)

In a pump facility for transporting dewatered sludge such as a sewage treatment plant and human waste treatment plant, a piston pump, a screw feeder that pumps the dewatered sludge to the hopper of the piston pump, and an input chute for introducing the dewatered sludge into the screw feeder A gas venting device for discharging gas accumulated in the hopper ,
A casing standing vertically upwards so as to communicate with the space between the hopper and the screw feeder, provided in the casing, of the constantly rotated in the pushing direction at the time of actuation of the screw feeder to the outside degasser pump equipment, characterized in that it comprises a venting screw which prevents the outflow of dewatered sludge while permitting outflow of gas.

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