JPS6320880Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Technical Field) The present invention relates to a dry cleaning device for a compressor or expander that handles flammable and harmful gases. (Prior art) In general, compressors that handle gas can remove dust contained in the gas to some extent with a filter, etc., but it is not completely removed, and fine powder adheres to the blades of the compressor, reducing efficiency over time. I'll come. As a method for recovering efficiency caused by this type of dirt, there is a dry cleaning method as shown in, for example, the US military standard MIL-G5634C (5 June 1970). This is a method in which old rice, rice husks, walnut shells, etc. are thrown into the suction side of the operating compressor, either by hand or into an open hopper, to remove dirt from the blades, etc., and is useful for cleaning gas turbine compressors, etc. This is a well-known technique that is frequently used. An example of these is shown in FIG. Although the dust contained in the gas entering the compressor 20 can be removed to some extent by the filter 2, the remaining fine powder dust cannot be removed, and the compressor 20
Attach to the wings of So filter 2 and compressor 2
A hopper 3 for dry cleaning is provided in the middle of the compressor 0, from which a fixed amount of dry cleaning agent is injected into the suction pipe 1 of the compressor and collided with the blades in the compressor 20 to remove dust. . However, these technologies are not used in compressors and expanders that handle flammable or toxic gases due to concerns about explosions due to air inhalation or accidents due to the ejection of toxic gases. Decontamination was not performed except when the equipment was opened. As a result, dust adhered to the wings, forcing the aircraft to continue operating at reduced efficiency. In view of the above, there has been a need for a method for safely removing dust adhering to the blades of a compressor or the like that handles flammable or harmful gases during operation. (Purpose of the invention) This invention was made to satisfy the existing demands, and was designed to remove dust adhering to the blades of compressors and expanders that handle flammable or harmful gases safely and during operation. The present invention provides a dry cleaning device for the suction pipe of a compressor or expander so that the suction pipe of a compressor or expander can be easily removed. (Structure and operation of the device) In a compressor and an expander that handle flammable or harmful gases, the present invention provides an upper A cleaning agent supply piping 19 connecting the closed pressurized hopper 21 is provided via the communication valve 9, and a cleaning agent cutting piping 16 connecting the open hopper 12 to the supply section of the hopper 21, as well as pressure and purge. The gas blowing pipe 17 that connects the gas supply device 8 for
A gas blowing pipe 18 is provided via the pressure communication valve 13 and the pressure regulating valve 7, and connects the pressure and purge gas supply device 8 to the cleaning agent supply pipe 19 of the cutout portion of the hopper 21. This is a dry cleaning device featuring the following. FIG. 1, in which the present invention is applied to a compressor, will be explained below. FIG. 1 shows an example in which, for example, a suction pipe 1 of a compressor 20 is equipped with a dry cleaning device 15. The dry cleaning device 15 includes an open hopper 12 into which a cleaning agent is charged in advance, an upper closed type pressurizing hopper 21 filled with the cleaning agent, a communication valve 11 between the open hopper 12 and the pressurizing hopper 21, and a pressurizing hopper 11. Hopper 2
1, a bleed valve 10 used when replacing the air in the compressor suction pipe 1 with N2 _, etc.; a communication valve 9 used when supplying the cleaning agent in the pressurizing hopper to the compressor suction pipe 1;
and the pressure used when replacing the inside of the pressurizing hopper with N ₂ or when the communication valve 9 is closed, the purge gas supply device 8, the inert gas pressure adjustment valve 7, the purge communication valve 5, the pressurization communication valve. 13. Consists of a gas blowing pipe 18 that connects a pressure and purge gas supply device 8 to a cleaning agent supply pipe 19 at the cutout portion of the hopper 21. A safety valve 14 may also be provided if necessary. The operation of the dry cleaning device with the above configuration will be described below. First, the valve shown in Figure 1 is fully closed,
(However, the inert gas pressure adjustment valve 7 and the bleed valve 10 can be left open.) Pour the dry cleaning agent into the open hopper 12 in advance, and then open the communication valve 1.
1, put the dry cleaning agent into the pressurizing hopper 21, and fill it with the required amount. After filling, connect valve 1
1, open the bleed valve 10,
The pressure regulating valve ₇ and the purge communication valve 5 are opened to pass an inert gas such as N ₂ into the pressurized hopper 21 to replace the air in the hopper with the inert gas. After replacement, the bleed valve 10 and the valve 5 are closed, and the communication valve 9 between the pressurizing hopper 21 and the compressor suction pipe 1 is opened to allow the dry cleaning agent in the hopper 21 to fall into the compressor suction pipe 1. The dry cleaning agent usually falls due to its own weight, but if the gas being handled is wet, the pressurized hopper 21 and the communication pipe 19 of the compressor suction pipe 1 may become clogged. To prevent this, the valve 13 is opened and the pressure hopper is pressurized with an inert gas such as N ₂ to force the dry cleaning agent to fall into the compressor suction pipe. Experience has shown that a pressure several hundred mmAq higher than the internal pressure of the suction pipe is sufficient. If the gas released from the bleed valve 10 poses no danger, a similar type of gas higher than the suction pressure of the compressor or expander may be used in place of the purge gas supply device 8. . Communication pipe 19 between pressurizing hopper 21 and compressor suction pipe 1
When there is no risk of blockage, pressurize communication valve 1
3 and its piping may be omitted. This device can also be applied to compressors and expanders that handle either flammable or hazardous products. The dry cleaning device 15 of the present invention is connected to the gas inlet pipe 1' of the expander 20'. (Example) Examples of the present invention are shown below. Table 1 shows the prerequisites for the example.

[Table] Under these conditions, a dry cleaning agent was put into a compressor that handles flammable or hazardous gases. As a result, operational efficiency and safety were sufficiently ensured as described below. Table 2 below shows the operating efficiency compared to when the present invention is not used.

[Table] Compared to the unused product of the present invention, the efficiency was improved by 4 to 5%, and the original function of the compressor was maintained. Furthermore, it was possible to easily implement the method while preventing accidents caused by explosions due to air inhalation or the ejection of harmful gases. The present invention achieved a similar effect in cleaning the expander. (Effects of the invention) According to the invention, dry cleaning of compressors and expanders that handle flammable and harmful gases can be performed at any time during operation to prevent accidents caused by explosions due to air intake or the ejection of harmful gases. However, since it is easy to implement, good efficiency can always be maintained and safe driving can be achieved. Furthermore, the present invention can achieve the same effects as described above even when dealing with flammable or harmful gases.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram in which the present invention is applied to a compressor that handles flammable or harmful gases, and FIG. 2 is an explanatory diagram of a dry cleaning device for a compressor that handles gases. 1: Gas suction pipe, 2: Filter, 3: Dry cleaning hopper, 4: Electric motor, 5: Purge communication valve, 6: Compressor discharge pipe, 7: Pressure adjustment valve, 8:
Pressure, purge gas supply device, 9: Pressure hopper and suction pipe communication valve, 10: Bleed valve, 11: Open hopper and pressurization hopper communication valve, 12: Open hopper, 13: Pressure communication valve, 14: Safety valve, 15: Dry cleaning device, 1
6: Detergent extraction pipe, 17, 18: Gas blowing pipe, 19: Detergent supply pipe, 20: Compressor,
21: Upper closed type pressurized hopper.

Claims (1)

[Scope of utility model registration request] An upper closed pressurizing hopper 21 is attached to the gas suction pipe 1 of the compressor 20 or the gas push pipe 1' of the expander 20'.
A cleaning agent supply pipe 19 connecting the hopper 21 is provided via the communication valve 9 to the supply section of the hopper 21.
Detergent cutting pipe 1 connecting open hopper 12
A gas blowing pipe 17 is provided to connect the pressure and purge gas supply device 8 to the hopper 21 via the pressure communication valve 13 and the pressure regulating valve 7.
A dry cleaning device characterized in that a gas blowing piping 18 is provided to connect a pressure and purge gas supply device 8 to a cleaning agent supply piping 19 at the cut-out portion.