WO2025020639A1 - Pipe scale online treatment system and working method thereof - Google Patents

Abstract

The present application relates to the technical field of pipe descaling, and discloses a pipe scale online treatment system and a working method thereof. The pipe scale online treatment system comprises a circulating water bypass pipe, a descaling and purification pipe, a first four-way valve, a second four-way valve, a filter device, an agent dispensing device, and a purification device; the circulating water bypass pipe and the descaling and purification pipe are connected in parallel to a circulating water main pipe by means of the first four-way valve and the second four-way valve, respectively; an inlet of the filter device is connected to the second four-way valve, an outlet of the filter device is connected to an inlet of the purification device, a drain outlet of the purification device is connected to a drain pipe, a clean water outlet of the purification device is connected to an inlet of the agent dispensing device, and an outlet of the agent dispensing device is connected to the first four-way valve. The present application implements online descaling without shutdown of the unit, and has high descaling efficiency; moreover, the system is simple to construct, and can be used for newly built equipment pipes, can also be used to transform existing equipment pipes, and has good compatibility.

Description

A pipeline scale online treatment system and working method thereof

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application filed with the China Patent Office on July 24, 2023, with application number 2023109109066 and invention name “A pipeline scale online treatment system and its working method”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present application belongs to the technical field of pipeline descaling, and specifically relates to an online pipeline scale treatment system and a working method thereof.

Background Art

During the long-term use of pipelines, particles in the water will combine to form insoluble, poorly soluble and slightly soluble substances, that is, scale. The formation of scale generally goes through a process of nucleation and growth. First, a few scale cores are formed and attached to the surface of the pipeline, and then more other scale-forming compounds gather around these cores to form larger scale groups, which affect the flow rate and flow of the fluid in the pipeline, and even block the pipeline in severe cases.

Therefore, it is necessary to descale the pipeline regularly. Common descaling methods can be roughly divided into three categories: chemical descaling, high-pressure water jet descaling, and mechanical descaling. Chemical descaling is based on the chemical composition of the scale layer and uses appropriate acid chemicals for dissolution and descaling. It has the characteristics of low operating cost and thorough descaling. However, in order to achieve a higher descaling rate, existing chemical descaling often requires applying a higher concentration of descaling agent to the pipeline after shutdown, and thorough cleaning is required after descaling, which will affect the normal operation of the unit.

Summary of the invention

In order to solve the above existing problems, the purpose of the present application is to provide an online pipeline scale treatment system and a working method thereof, which can chemically descale the circulating water main pipeline without stopping the machine and has high descaling efficiency.

This application is implemented through the following technical solutions:

The present application discloses an online pipeline scale treatment system, comprising a circulating water bypass pipeline, a descaling and purification pipeline, a first four-way valve, a second four-way valve, a filtering device, a dispensing device and a purification device;

The circulating water bypass pipeline and the descaling and purification pipeline are respectively connected in parallel to the circulating water main pipeline through the first four-way valve and the second four-way valve; the inlet of the filtering device is connected to the second four-way valve, the outlet of the filtering device is connected to the inlet of the purification device, the sewage outlet of the purification device is connected to the sewage pipeline, the clean water outlet of the purification device is connected to the inlet of the dispensing device, and the outlet of the dispensing device is connected to the first four-way valve.

Optionally, a circulating water bypass pump is provided on the circulating water bypass pipeline.

Optionally, a descaling and purification pump is provided on the descaling and purification pipeline.

Optionally, a sewage valve is provided on the sewage pipe.

Optionally, the filtering device includes a filter cartridge, a scale collecting box, a scale discharge pipe and a filter screen; the filter screen is arranged obliquely in the filter cartridge; a water inlet, a scale flushing port, a scale discharge port and a water outlet are provided on the filter cartridge, the water inlet and the scale flushing port are respectively connected to the scale removal and purification pipeline through branch pipes, and the water outlet is connected to the scale removal and purification pipeline; the scale flushing port is arranged at the starting end of the filter screen, and the scale discharge port is arranged at the end of the filter screen; the scale discharge port is connected to the scale collecting box through a scale discharge pipe; a water inlet valve is provided in the water inlet, a scale flushing valve is provided in the scale flushing port, and a scale discharge valve is provided in the scale discharge port.

Optionally, the scale discharge pipe is a gradually expanding trumpet pipe.

Optionally, a gravity sensor is provided at the bottom of the filter screen, and the gravity sensor is linked to the signals of the water inlet valve, the scale flushing valve and the scale discharge valve.

Optionally, the dispensing device includes a mixing box and a medicine box, the medicine box is connected to the mixing box through a medicine inlet pipe, the mixing box is connected to a water inlet pipe and a liquid outlet pipe, and the liquid outlet pipe is connected to the descaling and purification pipeline; a plurality of agitators are arranged in the mixing box.

Optionally, the number of the agitators is at least 2, and adjacent agitators have different heights.

The working method of the above-mentioned pipeline scale online treatment system disclosed in the present application includes:

When the circulating water main pipeline does not need to be descaled, the circulating water bypass pipeline and the descaling and purification pipeline are closed, and the circulating water flows through the circulating water main pipeline;

When the circulating water main pipeline needs to be descaled, the first four-way valve and the second four-way valve are used to control the opening of the circulating water bypass pipeline and the descaling and purification pipeline, and the circulating water is connected to the circulating water bypass pipeline to continue maintenance. The unit is kept in normal operation, and the circulating water main pipeline and the descaling and purification pipeline form a descaling circulation loop; the dispensing device adds the descaling agent into the descaling and purification pipeline, and the fallen scale is filtered by the filtering device and then discharged, the water enters the purification device for purification, the sewage is discharged through the sewage pipe, and the purified water continues to circulate; after the descaling is completed, the circulating water main pipeline and the descaling and purification pipeline are flushed, the circulating water bypass pipeline and the descaling and purification pipeline are closed, and the circulating water circulates through the circulating water main pipeline again.

Compared with the prior art, this application has the following beneficial technical effects:

The application discloses an online treatment system for pipeline scale, which is provided by setting a first four-way valve and a second four-way valve on the circulating water main pipeline of the unit itself, and setting a circulating water bypass pipeline and a descaling and purification pipeline in parallel with the circulating water main pipeline. When the circulating water main pipeline needs to be descaled, the circulating water bypass pipeline can continue to maintain the normal operation of the unit, and the circulating loop formed by the circulating water main pipeline and the descaling and purification pipeline is chemically descaled by a dispensing device, and the detached large pieces of scale are collected by a filtering device to avoid clogging the pipeline. After the water body is purified by the purification device, the sewage discharge system is subjected to subsequent water treatment, and the remaining purified water can continue to participate in the circulation. The application realizes online descaling without stopping the unit, and the descaling efficiency is high; and the system is simple to construct, and can be used on newly built equipment pipelines, and can also be used to transform existing equipment pipelines, and has good compatibility.

Optionally, the filter screen arranged at an angle inside the filter device is conducive to the discharge of a portion of the scale into the scale collecting box through the scale discharge pipe under the action of gravity; when there is a lot of scale on the filter screen, water can be introduced through the scale flushing port facing the filter screen to force the scale into the scale collecting box, which is convenient and quick and does not affect normal operation.

Optionally, the scale discharge pipe is a gradually expanding trumpet pipe, which is conducive to scale discharge and avoids blockage.

Optionally, a gravity sensor is provided at the bottom of the filter, which can monitor the total weight of the scale on the filter in real time. When the threshold is reached, the scale flushing operation is realized through the signal linkage with the water inlet valve, the scale flushing valve and the scale discharge valve.

Optionally, the dispensing device can provide an independent mixing box and medicine box to mix the medicines evenly before entering the pipeline, thereby avoiding damage to part of the pipeline due to excessive concentration of medicines; the agitator inside the mixing box can effectively improve the mixing effect.

Optionally, the number of agitators is at least 2 to avoid the limited range of a single agitator. There are dead zones in the mixing process, resulting in uneven mixing; the different heights of adjacent agitators cause the action ranges of the agitators to interfere with each other, further improving the mixing effect.

The working method of the above-mentioned pipeline scale online treatment system disclosed in the present application is easy to operate and has a high degree of automation. It can effectively improve the descaling effect and descaling efficiency of the pipeline and has good application prospects.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the system of the present application;

FIG2 is a schematic diagram of the structure of a filtering device;

FIG. 3 is a schematic structural diagram of a medicine dispensing device.

In the figure: 1 is the first four-way valve, 2 is the second four-way valve, 3 is the circulating water bypass pump, 4 is the descaling and purification pump, 5 is the filtering device, 5-1 is the filter cartridge, 5-2 is the scale collecting box, 5-3 is the scale discharge pipe, 5-4 is the filter screen, 5-5 is the water inlet valve, 5-6 is the scale flushing valve, 5-7 is the scale discharge valve, 6 is the dispensing device, 6-1 is the mixing box, 6-2 is the medicine box, 6-3 is the agitator, 6-4 is the water inlet pipe, 6-5 is the liquid outlet pipe, 7 is the purification device, and 8 is the sewage valve.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments, the contents of which are intended to explain the present application rather than to limit it:

As shown in FIG1 , an online pipeline scale treatment system of the present application includes a circulating water bypass pipeline, a descaling and purification pipeline, a first four-way valve 1 , a second four-way valve 2 , a filtering device 5 , a dispensing device 6 and a purification device 7 ;

The circulating water bypass pipeline and the descaling and purification pipeline are respectively connected in parallel to the circulating water main pipeline through the first four-way valve 1 and the second four-way valve 2; the inlet of the filtering device 5 is connected to the second four-way valve 2, the outlet of the filtering device 5 is connected to the inlet of the purifying device 7, the sewage outlet of the purifying device 7 is connected to the sewage pipeline, the clean water outlet of the purifying device 7 is connected to the inlet of the dispensing device 6, and the outlet of the dispensing device 6 is connected to the first four-way valve 1.

In a preferred embodiment of the present application, the circulating water bypass pipeline is provided with a circulating water bypass Pump 3.

In a preferred embodiment of the present application, a descaling and purification pump 4 is provided on the descaling and purification pipeline.

In a preferred embodiment of the present application, a sewage valve 8 is provided on the sewage pipe.

As shown in Fig. 2, in a preferred embodiment of the present application, the filter device 5 includes a filter cartridge 5-1, a scale collecting box 5-2, a scale discharge pipe 5-3 and a filter screen 5-4; the filter screen 5-4 is tiltedly arranged in the filter cartridge 5-1; the filter cartridge 5-1 is provided with a water inlet, a scale flushing port, a scale discharge port and a water outlet, the water inlet and the scale flushing port are respectively connected to the descaling and purification pipeline through a branch pipe, and the water outlet is connected to the descaling and purification pipeline; the scale flushing port is arranged at the beginning of the filter screen 5-4, and the scale discharge port is arranged at the end of the filter screen 5-4; the scale discharge port is connected to the scale collecting box 5-2 through a scale discharge pipe 5-3; a water inlet valve 5-5 is arranged in the water inlet, a scale flushing valve 5-6 is arranged in the scale flushing port, and a scale discharge valve 5-7 is arranged in the scale discharge port. Optionally, the scale discharge pipe 5-3 is a gradually expanding trumpet pipe. Optionally, a gravity sensor is provided at the bottom of the filter screen 5-4, and the gravity sensor is linked to the signals of the water inlet valve 5-5, the scale flushing valve 5-6 and the scale discharge valve 5-7.

As shown in FIG3 , in a preferred embodiment of the present application, the dispensing device 6 includes a mixing box 6-1 and a medicine box 6-2, the medicine box 6-2 is connected to the mixing box 6-1 through a medicine inlet pipe, the mixing box 6-1 is connected to a water inlet pipe 6-4 and a liquid outlet pipe 6-5, and the liquid outlet pipe 6-5 is connected to the descaling and purification pipeline; a plurality of agitators 6-3 are arranged in the mixing box 6-1. Optionally, the number of agitators 6-3 is at least 2, and the heights of adjacent agitators 6-3 are different. Optionally, a pH sensor, a concentration sensor, etc. can be arranged in the mixing box 6-1 to monitor the pH and concentration of the chemical agent to avoid poor descaling effect or damage to the pipeline.

The working method of the above pipeline scale online treatment system:

When the circulating water main pipeline does not need to be descaled, the circulating water bypass pipeline and the descaling and purification pipeline are closed, and the circulating water flows through the circulating water main pipeline;

When the circulating water main pipeline needs to be descaled, the first four-way valve 1 and the second four-way valve 2 are used to control the circulating water bypass pipeline and the descaling and purification pipeline to be opened, and the circulating water is connected to the circulating water bypass pipeline to continue to maintain the normal operation of the unit, and the circulating water main pipeline and the descaling and purification pipeline form a descaling circulation loop; the dispensing device 6 adds the descaling agent to the descaling and purification pipeline, and the fallen scale is filtered by the filtering device 5. After being discharged, the water body enters the purification device 7 for purification, the sewage is discharged through the sewage pipe, and the purified water continues to circulate; after the descaling is completed, the circulating water main pipe and the descaling and purification pipe are flushed, the circulating water bypass pipe and the descaling and purification pipe are closed, and the circulating water circulates through the circulating water main pipe again.

Specific working method of the filtering device 5:

A gravity sensor is set at the bottom of the filter 5-4, and a weight threshold is set to monitor the total weight of the scale on the filter 5-4 in real time. When the total weight of the scale does not reach the weight threshold, the water inlet valve 5-5 is opened, the flushing valve 5-6 and the discharge valve 5-7 are closed, water is introduced through the upper water inlet, and the larger scale is intercepted on the filter 5-4, and the water is discharged through the water outlet. When the total weight of the scale reaches the weight threshold, the water inlet valve 5-5 is closed, the flushing valve 5-6 and the discharge valve 5-7 are opened, and the water enters from the flushing port to flush the scale on the filter 5-4, and the scale enters the scale collecting box 5-2 through the discharge port through the discharge pipe 5-3 for collection.

The specific working method of the dispensing device 6:

When descaling is required, the reagent box 6-2 injects the chemical agent into the mixing box 6-1 at a set dosing speed, and injects water to adjust the concentration through the water inlet pipe 6-4 when necessary. The agent is stirred by the stirrer 6-3 in the mixing box 6-1 and mixed evenly with water, and then enters the descaling purification pipeline through the liquid outlet pipe 6-5.

The above descriptions are merely embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed in the present application, or equivalent structures or equivalent process transformations made using the contents of the present application specification and drawings, or direct or indirect applications in other related technical fields, should all be covered within the protection scope of the present application.

Claims (10)

A pipeline scale online treatment system, characterized by comprising a circulating water bypass pipeline, a descaling and purification pipeline, a first four-way valve (1), a second four-way valve (2), a filtering device (5), a dispensing device (6) and a purification device (7); The circulating water bypass pipeline and the descaling and purification pipeline are respectively connected in parallel to the circulating water main pipeline through a first four-way valve (1) and a second four-way valve (2); the inlet of the filtering device (5) is connected to the second four-way valve (2), the outlet of the filtering device (5) is connected to the inlet of the purifying device (7), the sewage outlet of the purifying device (7) is connected to the sewage outlet pipeline, the purified water outlet of the purifying device (7) is connected to the inlet of the dispensing device (6), and the outlet of the dispensing device (6) is connected to the first four-way valve (1). The online pipeline scale treatment system according to claim 1 is characterized in that a circulating water bypass pump (3) is provided on the circulating water bypass pipeline. The online pipeline scale treatment system according to claim 1 is characterized in that a scale removal and purification pump (4) is provided on the scale removal and purification pipeline. The online pipeline scale treatment system according to claim 1 is characterized in that a sewage valve (8) is provided on the sewage pipeline. The pipe scale online treatment system according to claim 1 is characterized in that the filtering device (5) comprises a filter cartridge (5-1), a scale collecting box (5-2), a scale discharge pipe (5-3) and a filter screen (5-4); the filter screen (5-4) is obliquely arranged in the filter cartridge (5-1); a water inlet, a scale flushing port, a scale discharge port and a water outlet are provided on the filter cartridge (5-1), the water inlet and the scale flushing port are respectively connected to the scale removal and purification pipeline through branch pipes, and the water outlet is connected to the scale removal and purification pipeline; the scale flushing port is arranged at the beginning of the filter screen (5-4), and the scale discharge port is arranged at the end of the filter screen (5-4); the scale discharge port is connected to the scale collecting box (5-2) through the scale discharge pipe (5-3); a water inlet valve (5-5) is arranged in the water inlet, a scale flushing valve (5-6) is arranged in the scale flushing port, and a scale discharge valve (5-7) is arranged in the scale discharge port. The online pipeline scale treatment system according to claim 5 is characterized in that the scale removal pipe (5-3) is a gradually expanding trumpet pipe. The online pipeline scale treatment system according to claim 5 is characterized in that the filter (5-4) A gravity sensor is provided at the bottom, and the gravity sensor is linked to the signals of the water inlet valve (5-5), the scale flushing valve (5-6) and the scale discharge valve (5-7). The online pipeline scale treatment system according to claim 1 is characterized in that the dispensing device (6) includes a mixing box (6-1) and a medicine box (6-2), the medicine box (6-2) is connected to the mixing box (6-1) through a medicine inlet pipe, the mixing box (6-1) is connected to a water inlet pipe (6-4) and a liquid outlet pipe (6-5), and the liquid outlet pipe (6-5) is connected to the descaling and purification pipeline; a plurality of agitators (6-3) are arranged in the mixing box (6-1). The online pipeline scale treatment system according to claim 8 is characterized in that the number of agitators (6-3) is at least 2, and the heights of adjacent agitators (6-3) are different. A working method of an online pipeline scale treatment system, wherein the system is the online pipeline scale treatment system according to any one of claims 1 to 9, characterized in that the working method comprises: When the circulating water main pipeline does not need to be descaled, the circulating water bypass pipeline and the descaling and purification pipeline are closed, and the circulating water flows through the circulating water main pipeline; When the circulating water main pipeline needs to be descaled, the first four-way valve (1) and the second four-way valve (2) are used to control the opening of the circulating water bypass pipeline and the descaling and purification pipeline, and the circulating water is connected to the circulating water bypass pipeline to continue to maintain the normal operation of the unit, and the circulating water main pipeline and the descaling and purification pipeline form a descaling circulation loop; the dispensing device (6) adds the descaling agent to the descaling and purification pipeline, and the fallen scale is filtered by the filtering device (5) and then discharged, and the water enters the purification device (7) for purification, and the sewage is discharged through the sewage pipeline, and the purified water continues to circulate; after the descaling is completed, the circulating water main pipeline and the descaling and purification pipeline are flushed, the circulating water bypass pipeline and the descaling and purification pipeline are closed, and the circulating water circulates through the circulating water main pipeline again.