JPS58184500A - Automatic washing device for condenser - Google Patents

Abstract

PURPOSE:To obtain a favorable washing effect and to save energy by a method wherein the washing device for the condenser is subjected to a feedback control through a control signal representing the number of washing members detected by a washing member calculating device, thereby making a constant number of the washing members flow through the inside of a cooling pipe all the times. CONSTITUTION:The washing device is operated in such a manner that a grid 15 of a washing member catching device 3 is held in a catching condition by means of a drive device 11 for the collector, a valve 13 is opened, a washing member circulating pump 4 is started, valve 12, 24, 14 and 10 are opened and the washing members are put into a cooling water inlet pipe through the washing member calculating device 19. The, when the total number of the washing members 8 passed through the cooling pipe 2 reaches a predetermined value, the operation of the washing device is terminated. The termination of the washing device is effected in such a manner that the valve 14 is closed, the valve 10 is closed while valves 23, 28 and 27 are opened after the washing members 8 are received in a washing member collector 5. Then the valve 14 is opened and the washing members 8 are stored in a washing member storing device 20 while the number of the collected washing members is detected by the washing member calculating device 19. In this case, all of the valves of various kinds, the washing member circulating pump and the drive device for driving the grid of the washing member catching device are controlled by a microcomputer connected to the washing member calculating device 19.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a condenser cleaning device, and more particularly to an automatic cleaning device equipped with a cleaning body counting device.

A conventional condenser cleaning device is shown in FIG.

The condenser 1 condenses steam discharged from the turbine 9 through a cooling pipe 2. Note that cooling water is flowing through the cooling pipe 2. Natural water, such as river water or seawater, is normally used as the cooling water, and algae, mud, etc. contained in the river water and seawater adhere to the inner surface of the cooling pipe 2. As a result, the heat transfer coefficient of the cooling pipe 2 is reduced, causing a decrease in the internal pressure of the condenser 1, resulting in a reduction in plant efficiency.

The condenser cleaning device always keeps the cooling pipe 2 in a clean state by passing the cleaning body 8 into the cooling pipe 2. The condenser cleaning device has a cleaning body collector 3, a cleaning body circulation It mainly consists of a pump 4 and a cleaning body recovery device 5. The operating method of this condenser cleaning device will be explained below.

At the start of operation, all valves 10, 12, 13, 14 are closed.

First, the collector grid driving device 1 is photographed to bring the grid 15 of the collector 3 into a collecting state. Next, after opening the valve 13 and rotating the cleaning body circulation pump 4, the valves 12, 14.
0 is opened, and the cleaning body 8 is introduced into the cooling water inlet pipe 6 by the cleaning body circulation pump 4.

The cleaning body 8 introduced into the cooling water inlet pipe 6 passes through the cooling pipe 2 and removes scale adhering to the inner surface of the cooling pipe 2. The cleaning body 8 from which the scale has been removed is separated by the cooling water system by the cleaning body collector 3 and returned to the cleaning body recovery unit 5 via the cleaning body circulation pump 4, forming one cycle. This cycle is repeated several dozen times to uniformly clean the entire inner surface of the cooling tube.

The finishing operation is to close the pulp 14, store all the cleaning bodies 8 in the cleaning body recovery device 5, close the pulp 10.12, stop the cleaning body circulation pump 4, close the pulp 13, and then open the grating 15. The process is completed by setting the grid 15 to a non-collecting state in order to flush out the dust that has adhered to the surface.

The operation of the pulp 10, 14, 12.13 cleaning body circulation pump 4 and collector grid drive device 11 is combined with a timer so that the entire process is completed by pressing the start button.

The disadvantage of this conventional condenser cleaning system is that the number of cleaning bodies must be counted and stored in the cleaning body collecting device before the start of operation, which requires a large amount of human power. , stagnates in the collector and cannot be collected in the collector even after the operation is finished. In this case, it is necessary to add the missing amount to obtain a good cleaning effect, but after the operation ends, Confirming the number of cleaning personnel also depends on human power, and requires a large amount of human power. In addition, since the condenser cleaning device is controlled by a timer, feedback control is not possible, and if the collector malfunctions, that is, the grid does not become in the collecting state, the condenser cleaning device will not operate properly in the first cycle. The cleaning body is discarded outside the condenser cleaning system and is not stored in the recovery device, and subsequent operations are performed without the cleaning body, and the inner surfaces of the cooling pipes are not cleaned.

Not cleaning the inner surface of the cooling tube and uneven cleaning of the tube nests will cause scale adhesion on the inner surface of the cooling tube, reducing the vacuum level of the condenser, as well as marine organisms such as Fujibo.
:1: If the inside of the cooling pipe is not cleaned for 24 hours or more, □ will adhere to and grow on the inner surface of the cooling pipe, causing a blockage of the cooling pipe, or cause an impingement attack, leading to leakage of the cooling pipe.

An object of the present invention is to provide an automatic condenser cleaning device that can automatically perform good operational control.

The features of the present invention include sequence control using a timer,
By using the number of cleaning bodies detected by the cleaning body counter as a control signal, the condenser cleaning device can be controlled by feedback.
A fixed number of cleaning bodies are always passed through the cooling pipe to obtain a good cleaning effect and also to save manpower.

Next, an automatic condenser cleaning device which is an embodiment of the present invention will be described below.

FIG. 2 shows the cleaning body counter 19, which consists of a cleaning body detection sensor 16 and a pipe 18 to which the cleaning body detection sensor 16 is attached.
The cleaning body detection sensor 16 generates an electric signal when the cleaning body 8 passes through the pipe 18. This electrical signal is carried to the connection terminal 17 by a lead wire.

Next, an automatic continuous cleaning device for a condenser using this cleaning body counter will be explained. Figure 3 shows an automatic continuous condenser cleaning device. The configuration of this device is a cleaning body collector 3, a cleaning body circulation pump 4, a cleaning body recovery device 5, a cleaning body storage device 20, a cleaning body counter 19, a microcomputer 21, and a switch box 2.
2. Various pulps and piping. The operating method will be explained below.The entire pulp is closed, a large number of cleaning bodies are put into the cleaning body storage 20 and stored, and then the pulp 13 is opened and the cleaning body circulation pump 4 is started. By opening the pulps 12, 25, 28, 23, 14, and 26, the cleaning body 8 stored in the cleaning body storage device 20 passes through the cleaning body counter 19 and is stored in the cleaning body recovery device 5. .

The number of cleaning bodies 8 is counted by a cleaning body counter 19, and the cleaning body counter 19 is connected to a microcomputer 21 and a switch box 22.

After a certain number of cleaning bodies 8 are stored in the cleaning body recovery device 5, the pulp 28 is closed, and then the pulps 23, 26, 25, and 12 are closed following the pulp 14, and then the cleaning body circulation pump 4 is closed. and close the valve 13 to prepare for the start of operation of the cleaning equipment.

Next, the operation of this cleaning device will be described below. The grid 15 of the cleaning body collector 3 is brought into a collecting state by the collector drive device 11,
After the pulp 13 is opened and the cleaning body circulation pump 4 is started, the pulps 12, 24, 14° 10 are opened, the cleaning body is passed through the cleaning body counter 19, and the cleaning body is introduced into the cooling water inlet pipe. When the total number of cleaning bodies 8 that have passed through the cooling pipe 2 reaches a certain number, a termination operation begins.

After closing the pulp 14 and storing the cleaning body 8 in the cleaning body recovery device 5, the pulp 10 is closed and the valves 23 and 2 are closed.
8.27 is opened, then the nozzle 14 is opened, and the cleaning body 8 is stored in the cleaning body storage container 20 while the number of cleaning bodies 8 collected is detected by the cleaning body counter 19.Storage After finishing: After closing pulp 28, pulp 12, 24, 23
．． 27 is closed to stop the washer circulation pump 4, and the coil 13 is closed to set the grating 15 of the washer collector 3 to a non-collecting state and the process is completed.

In addition, various types of lumps in this condenser automatic continuous cleaning device,
The washer circulation pump and collector grid drive device are all controlled by a microcomputer connected to the washer counter.

According to an embodiment of the present invention, by feeding the cleaning bodies from the cleaning body storage device to the cleaning body collecting device while keeping track of the number of cleaning bodies with the cleaning body counter, a fixed number of cleaning bodies are always recovered. At the same time, during operation of the cleaning equipment, the total number of cleaning bodies passing through the cooling pipe and returning is kept track of, and a constant total number of cleaning bodies are always passed through, and at the end of the operation, the cleaning bodies are cleaned from the cleaning body collecting device. Returning the wash body to the wash body storage via the body counter determines the recovery rate of the wash body.

FIG. 4 shows another embodiment of the cleaning body counter according to the present invention, which differs from FIG. 2 in that a nozzle plate 29 is attached to the inlet side of the tube 18.

In this embodiment, by passing the cleaning bodies 8 that have entered successively through the nozzle plate 29, there is an effect that the cleaning bodies 8 are given a distance and the cleaning bodies can be easily detected.

According to the present invention, the required number of cleaning bodies is automatically stored in the cleaning body collecting device by sending the cleaning bodies storing a large number of cleaning bodies into the cleaning body collecting device via the cleaning body counter. In addition to saving manpower, the recovery rate of the cleaning body can be automatically determined at the end of the process, thereby saving manpower.

During the cleaning operation, the total number of cleaning objects that have passed through the cooling pipe can be determined, and the necessary total number of cleaning objects can always be passed through the cooling pipe for cleaning, resulting in a good cleaning effect. If a body is discarded outside the cleaning system, it is detected by the cleaning body counter and early countermeasures can be taken, allowing the inner surface of the cooling pipe to be kept in good condition at all times.

According to the present invention, it is possible to realize an automatic condenser cleaning device that can automatically perform good operational control.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing a conventional condenser cleaning device, Fig. 2 is a sectional view of a cleaning body counter used in an automatic condenser cleaning device which is an embodiment of the present invention, and Fig. 3 4 is a system diagram showing an automatic condenser cleaning device which is an embodiment of the present invention.
The figure shows a sectional view of a cleaning body counter which is another embodiment of the present invention. 8...Cleaning body, 19...Cleaning body counter, 16...
Cleaning body detection sensor, 18... Pipe, 29... Nozzle plate, 21... Microcomputer, 20... Cleaning body storage device, No. 703 M

Claims (1)

[Claims] 1. A plurality of pipes through which cleaning bodies can flow, a cleaning body detection sensor installed in the pipes, and a system that calculates the number of cleaning bodies based on a signal detected by the cleaning body detection sensor. An automatic condenser cleaning device characterized by having a counter for calculating and a control device for controlling the operation of the cleaning device according to the number of bodies to be cleaned calculated by the counter. An automatic condenser cleaning device characterized in that a nozzle plate having a hole is attached to the inlet side of the pipe equipped with a cleaning body counter according to item 1.