CN112268484A

CN112268484A - Cooler online cleaning device

Info

Publication number: CN112268484A
Application number: CN202011161629.6A
Authority: CN
Inventors: 张邢蓓; 李剑; 徐平; 周士钧
Original assignee: Jiangsu Soviet Peak Industry Co ltd
Current assignee: Jiangsu Soviet Peak Industry Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-01-26

Abstract

The invention provides an online cleaning device for a cooler, which comprises a backflow mechanism, a storage mechanism and a supply mechanism which are connected in sequence, wherein the backflow mechanism is connected with a water return pipeline of the cooler, and the supply mechanism is connected with an incoming water pipeline of the cooler. When the cooler needs to be cleaned, the water inlet valve in the water inlet pipeline and the water return valve in the water return pipeline are closed, the feeding valve and the feeding pump 7 in the feeding mechanism are opened, the material return valve in the return mechanism promotes the cleaning liquid in the storage mechanism to form closed circulation between the cooler and the storage mechanism, scale in the cooler is removed, and the reacted liquid medicine and scale are discharged through the discharge hole.

Description

Cooler online cleaning device

Technical Field

The invention relates to an on-line cleaning device for a cooler, and belongs to the technical field of heat exchange and cooling.

Background

In the normal production process of a power plant, strict standards are set for temperature control of various working media, and in order to meet the requirements of the production process, a heat exchange device, an oil cooler of an oil system, a water ring vacuum pump and a cooling device of closed demineralized water are added in each system, and the purpose of controlling the temperature of various media is achieved through reverse and forward flow exchange of cold and hot media.

Because the cooling water of cooler all comes from the circulating water, the scale deposit of cooler water side appears gradually in the operation later stage, leads to the water side through-flow area to reduce, the poor grow of end of cooler, the poor problem of cooling effect can't satisfy by the requirement of cooling medium to production technology. In order for the cooler to meet the process requirements, the cooler must be periodically cleaned for disassembly. The following problems will occur during the disintegration cleaning process: during the disassembly and cleaning of the cooler, the system has no standby equipment, once the running equipment has problems, the standby cooler cannot be switched into the system to run in time, and hidden danger is brought to the stable running of the unit; the cooler of current power plant adopts plate cooler more, and plate cooler is more strict to the installation technology requirement at the dismouting in-process, leaks the problem in appearing between the heat transfer medium easily after repacking, and on the other hand disintegrates and washs the cooler, can lead to the gasket between the cooler to damage, increases the cost of overhaul.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides an on-line cleaning device for a cooler,

the cooler does not need to be disassembled and assembled, is cleaned on line in a standby state, is simple and efficient, and does not influence the stable operation of the unit.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the on-line cleaning device for the cooler comprises a storage mechanism, a supply mechanism and a backflow mechanism, wherein the storage mechanism comprises a storage tank, and a material return hole, a material supplementing hole, a material discharging hole and a material supply hole are formed in a storage tank body; the feeding mechanism comprises a feeding pipeline, and a feeding pump and a feeding valve which are positioned on the feeding pipeline; the backflow mechanism comprises a material return valve and a material return pipeline;

the feeding hole in the storage mechanism is connected between a water supply pipeline and the cooler through a feeding pipeline in the feeding mechanism, one end of a material return pipeline in the backflow mechanism is connected between a water return pipeline and the cooler, and the other end of the material return pipeline is connected with the material return hole.

Furthermore, still be provided with the chemical examination hole on the storage tank body, conveniently take a sample the chemical examination to reaction liquid medicine, ensure that the PH of liquid medicine is between 1-2, possess the scale removal condition.

Furthermore, a water inlet valve is arranged on the water inlet pipeline, and a water return valve is arranged on the material return pipeline.

Furthermore, the supply pipeline is connected to a water inlet pipeline between the water inlet valve and the cooler, and the return pipeline is connected to a return pipeline between the return valve and the cooler, so that the control and saving of cleaning liquid are facilitated.

Furthermore, the discharge hole is connected with a discharge pipeline provided with a discharge valve, so that the reacted liquid medicine and water scale can be conveniently discharged.

Furthermore, the discharge valve, the feed valve and the return valve are all ball valves.

Further, the feeding pump is a metering pump, and the flow can be adjusted according to conditions.

Furthermore, the feeding pipeline and the return pipeline are plastic pipelines.

Compared with the prior art, the invention has the following beneficial effects:

the cleaning device for the cooler solves the problem that the cooler needs to be disassembled for cleaning and scaling, carries out online cleaning in a standby state, is not limited by maintenance time, and has the advantages of simple structure, high cleaning effect and energy saving.

Drawings

FIG. 1 is a schematic diagram of an overall structure of an on-line cleaning device for a cooler according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a closed cycle configuration for use in a cleaning mode of an apparatus according to an embodiment of the present invention;

in the figure: 1-a plate cooler body; 2-a water inlet valve; 3-a fuel inlet valve; 4-a water return valve; 5-an oil return valve; 6-a material storage tank; 7-a feed pump; 8-a feed valve; 9-a material return valve; 10-chemical hole inspection; 11-a feeding hole; 12-a discharge hole; 13-a feed conduit; 14-a return conduit; 15-a discharge pipe; 16-a feed hole; 17-a feed back hole; 18-a discharge valve; 19-incoming water pipe; 20-a water return pipeline.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Fig. 1 is a schematic diagram of an overall structure of an on-line cooler cleaning device according to an embodiment of the present invention, which can implement on-line cleaning of a plate cooler. The plate cooler is a heat exchanger for cooling oil by using circulating water, and comprises a water inlet valve 2, a water return valve 4, an oil inlet valve 3 and an oil return valve 5 which are stop valves and pipelines connected with the stop valves except a plate cooler body 1. In the system, the online cleaning device consists of a storage tank 6, a feeding pump 7, a feeding valve 8 and a return valve 9, wherein the feeding valve 8 and the return valve 9 are ball valves. Wherein, one end of the feeding pipeline 13 where the feeding valve 8 is positioned is connected with the feeding hole 16, and the other end is connected with the water inlet pipeline 19 and is connected behind the water inlet valve 2; one end of the return pipeline 14 is connected to the return pipeline 20 and is connected in front of the return valve 4, and the other end is connected to the return hole 17.

When the plate cooler 1 is in a normal operation state, the feeding pump 7, the feeding valve 8 and the return valve 9 are all closed, the water inlet valve 2, the oil inlet valve 3, the water return valve 4 and the oil return valve 5 are all opened, and heat exchange is carried out between oil and circulating water. When the plate cooler runs for a period of time and the water side needs to be cleaned, the water inlet valve 2, the water return valve 4, the oil inlet valve 3 and the oil return valve 5 are closed. The feed valve 8, the return valve 9 and the feed pump 7 are opened. The feed liquid in the storage tank 6 is merged into the water inlet pipeline 19 along with the feed pipeline 13, the feed liquid enters the water side of the cooler along the pipeline, reacts with the scale in the water side to promote the falling of the feed liquid, the feed liquid carrying the scale flows out of the water side and then enters the return pipeline 14, and the feed liquid returns to the storage tank 6 in the branch return pipeline 14, so that the cleaning cycle is completed.

As shown in fig. 2, the closed cycle structure used in the cleaning state of the device according to the embodiment of the present invention is schematically illustrated, and only the cooling water inlet/return manual valve of the cooler needs to be closed, the newly installed ball valve is opened, and the cooler, the cleaning pump and the cleaning chemical tank are connected by means of the external cleaning pump and the cleaning chemical channel, so as to form a closed cycle while ensuring that the cleaning chemical does not corrode the cooler. According to the cleaning requirements, the concentration of cleaning liquid medicine is configured or sulfamic acid liquid medicine and liquid medicine provided by Suzhou Jinminwei environmental protection materials Co_PH has high scale removing effect at 1-2, and can be used as medicinal liquid_PH>At 3.5 the descaling capacity will be lost. Before the cleaning state is entered and the feed valve 8 and the return valve 9 are opened, sampling and testing are carried out in the portion shown by the testing hole 10 to ensure the liquid medicine_PH is between 1 and 2, and the feed liquid has descaling conditions.

After the device operates for a period of time, the operation end point is controlled by two points: firstly, no scale particles are in the return material of the liquid medicine by visual inspection, and secondly, the return material of the liquid medicine is_PH remains stable and less than 3.5 for a longer period of time. Such as a medicinal liquid_PH is kept near 3.5 for a longer time, considering that the liquid medicine loses the descaling capacity, the components shown by a discharge hole 12 on the storage tank are utilized to discharge the ineffective materials and scale, and then the ineffective materials and scale are shown by a feed hole 11And the part enters a new material to be cleaned. The discharge valve 18 is opened, and the discharged liquid medicine is collected through the discharge pipeline 15 and then is uniformly processed by a supplier. The time required for one-time cleaning is 6-8 hours, and operators need to pay attention to wearing acid-resistant protective clothing to avoid injury during cleaning due to low toxicity of the liquid medicine.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The on-line cleaning device for the cooler is characterized by comprising a storage mechanism, a supply mechanism and a backflow mechanism, wherein the storage mechanism comprises a storage tank (6), and a material return hole (17), a material supplementing hole (11), a material discharging hole (12) and a material supply hole (16) are formed in a storage tank body (6); the feeding mechanism comprises a feeding pipeline (13), and a feeding pump (7) and a feeding valve (8) which are positioned on the feeding pipeline (13); the backflow mechanism comprises a material return valve (9) and a material return pipeline (14);

the feeding hole (16) in the storage mechanism is connected between a water inlet pipeline (19) and the cooler through a feeding pipeline (13) in the feeding mechanism, one end of a return pipeline (14) in the return mechanism is connected between a return pipeline (20) and the cooler, and the other end of the return pipeline (14) is connected with a return hole (17).

2. The on-line cleaning device for the cooler is characterized in that the storage tank body (6) is further provided with a chemical examination hole (10).

3. The on-line cleaning device for the cooler is characterized in that a water inlet valve (2) is arranged on the water inlet pipeline (19), and a water return valve (4) is arranged on the material return pipeline (14).

4. An on-line cooler cleaning device according to claim 3, characterized in that the supply pipe (13) is connected to a water supply pipe (19) between the water supply valve (2) and the cooler, and the return pipe (14) is connected to a return pipe (14) between the water return valve (4) and the cooler.

5. An in-line cooler cleaning device according to claim 1, characterized in that the discharge hole (12) is connected to a discharge conduit (15) provided with a discharge valve (18).

6. An on-line cleaning device for a cooler as claimed in claim 5, characterized in that the discharge valve (18), the supply valve (8) and the return valve (9) are all ball valves.

7. An in-line cooler cleaning device according to claim 1, characterized in that the feed pump (7) is a metering pump, which is capable of regulating the flow rate.

8. An on-line cooler cleaning device according to claim 1, characterized in that the supply pipe (13) and the return pipe (14) are plastic pipes.