阅读说明：本技术 一种水冷塔布水器反冲洗系统以及反冲洗方法 (Backwashing system and backwashing method for water distributor of water cooling tower ) 是由 查统亮 甘强 于 2020-06-17 设计创作，主要内容包括：本发明公开了一种水冷塔布水器反冲洗系统以及反冲洗方法,属于水冷塔领域。一种水冷塔布水器反冲洗系统,包括：进水总阀、排水阀、旁通阀与调节阀；所述进水总阀与所述调节阀串接在主管道上,所述旁通阀串接在支管道上；所述主管道的一端与外部水源连通,另一端与所述布水器连通；所述支管道的一端与所述主管道靠近所述外部水源的一端连通,另一端与所述主管道的位于所述进水总阀与所述调节阀之间的部分连通；所述排水阀串接在所述进水总阀与所述调节阀之间,其中,所述布水器灌满水时,所述布水器的水位高度高于所述排水阀的出水口的水平高度。与现有技术相比,本申请的反冲洗系统在疏通布水器的同时,不干涉空分设备的正常工作。(The invention discloses a backwashing system and a backwashing method for a water distributor of a water cooling tower, and belongs to the field of water cooling towers. A water-cooling tower water distributor back flush system includes: a main water inlet valve, a drain valve, a bypass valve and an adjusting valve; the main water inlet valve and the regulating valve are connected in series on the main pipeline, and the bypass valve is connected in series on the branch pipeline; one end of the main pipeline is communicated with an external water source, and the other end of the main pipeline is communicated with the water distributor; one end of the branch pipeline is communicated with one end of the main pipeline close to the external water source, and the other end of the branch pipeline is communicated with the part of the main pipeline between the main water inlet valve and the regulating valve; the water discharge valve is connected in series between the water inlet main valve and the regulating valve, wherein when the water distributor is filled with water, the water level of the water distributor is higher than the level of the water outlet of the water discharge valve. Compared with the prior art, the back flush system of this application is when dredging the water-locator, does not interfere air separation equipment's normal work.)

1. The utility model provides a water-cooling tower water-locator back flush system which characterized in that includes:

a main water inlet valve, a drain valve, a bypass valve and an adjusting valve; the main water inlet valve and the regulating valve are connected in series on the main pipeline, and the bypass valve is connected in series on the branch pipeline; one end of the main pipeline is communicated with an external water source, and the other end of the main pipeline is communicated with the water distributor;

one end of the branch pipeline is communicated with one end of the main pipeline close to the external water source, and the other end of the branch pipeline is communicated with the part of the main pipeline between the main water inlet valve and the regulating valve;

the drain valve is connected in series between the main water inlet valve and the regulating valve,

when the water distributor is filled with water, the water level of the water distributor is higher than the level of the water outlet of the drain valve.

2. The water distributor backwash system according to claim 1, wherein a reservoir is provided below the drain valve, and the reservoir is connected to the main pipe or an external water source through a circulation pipe.

3. The water distributor backwash system according to claim 2, wherein the circulation line is provided with a filter member for filtering impurities in the circulation line.

4. The water-cooling tower water distributor backwashing system of claim 1, further comprising a processor, wherein a liquid level sensor is arranged in the water distributor, the liquid level sensor is triggered when the water distributor is full of water, and the liquid level sensor, the water inlet main valve, the drain valve, the bypass valve and the regulating valve are electrically connected with the processor.

5. The water distributor backwashing system of claim 1, wherein the inner walls of the water distribution holes are funnel-shaped, and the diameters of the water outlet ends of the water distribution holes are larger than the diameters of the water inlet ends of the water distribution holes.

6. A water-cooling tower water distributor back-flushing method is characterized by comprising the following steps:

a main pipeline is arranged to communicate the water distributor with an external water source, and a main water inlet valve and a regulating valve are connected in series on the main pipeline; connecting a bypass valve in series on a branch pipeline, wherein one end of the branch pipeline is communicated with one end of the main pipeline close to the external water source, and the other end of the branch pipeline is communicated with the part of the main pipeline between the main water inlet valve and the regulating valve;

s1: when the bypass valve and the drain valve are closed, the external water source can flow to the water distributor through the main pipeline by opening the main water inlet valve and the regulating valve;

s2: when the water distributor is blocked, the water inlet main valve is closed firstly, the bypass valve is opened, and the external water source flows into the water distributor through the bypass valve and the regulating valve;

s3: and when the liquid level of the water distributor is higher than the horizontal height of the water outlet of the drain valve, the drain valve is opened, and the water in the water distributor is discharged through the water distribution hole, the main pipeline and the drain valve in sequence.

7. The water distributor backwashing method of claim 6, wherein the regulating valve is fully opened when the drain valve is opened.

8. The water distributor backwashing method of claim 6, wherein water distribution holes of the water distributor are completely unblocked from a main pipeline, and when the water pressure at the water inlet end of the main pipeline is a fixed value X which is greater than zero and the opening degree of the main water inlet valve and the regulating valve is a fixed value Y which is greater than zero, the flow rate of the outlet of the main pipeline is measured and used as a reference value;

when the water distributor works, when the water pressure of the main pipeline is X and the opening degree of the main water inlet valve and the regulating valve is a fixed value Y which is larger than the fixed value Y, measuring the flow speed of the outlet of the main pipeline as an actual measured value, and executing S2 when the ratio of the reference value to the actual measured value is larger than Z;

wherein Z is a constant greater than 1.

Technical Field

The invention relates to the field of water cooling towers, in particular to a backwashing system and a backwashing method for a water distributor of a water cooling tower.

Background

The air separation equipment is a large-scale comprehensive equipment which runs continuously, the system is multiple, the machine is not easy to stop under normal conditions, in an air separation precooling system, a water cooling tower mainly aims at reducing the temperature of cooling water entering the air cooling tower, the water source of the water cooling tower is clean circulating water, a water distributor at the top of the water cooling tower mainly provides uniformly distributed cooling water for the water cooling tower, the water exchanges heat with saturated and dry nitrogen and waste nitrogen in the process of flowing from top to bottom, the water temperature is reduced, and after the pressure of low-temperature water is increased by a centrifugal refrigerating pump, the temperature of the low-temperature water is further reduced by an industrial refrigerator and then the low-. In the operation process of the water-cooling tower, water distribution holes in a pipeline of the water distributor are blocked, so that the water-cooling tower is lack of water, and the refrigerating pump is forced to stop operating. Therefore, in the air separation plant, it is necessary to ensure the openness of the water distributor to maintain the stable operation of the whole air separation plant.

However, some air separation plants, especially large or complex air separation plants, have water distributors which are difficult to open once they are clogged. And when the air separation system is dredged, the whole air separation system must be in standby state to wait for the water distributor to recover to operate, so that the air separation system can be restarted. Obviously, when the dredging method or the dredging system of the water distributor of the existing water cooling tower is used for dredging, the normal operation of the whole system is interfered, and the production efficiency is reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a backwashing system and a backwashing method for a water distributor of a water cooling tower.

The purpose of the invention can be realized by the following technical scheme:

a water-cooling tower water distributor back flush system includes:

a main water inlet valve, a drain valve, a bypass valve and an adjusting valve; the main water inlet valve and the regulating valve are connected in series on the main pipeline, and the bypass valve is connected in series on the branch pipeline; one end of the main pipeline is communicated with an external water source, and the other end of the main pipeline is communicated with the water distributor;

one end of the branch pipeline is communicated with one end of the main pipeline close to the external water source, and the other end of the branch pipeline is communicated with the part of the main pipeline between the main water inlet valve and the regulating valve;

the drain valve is connected in series between the main water inlet valve and the regulating valve,

when the water distributor is filled with water, the water level of the water distributor is higher than the level of the water outlet of the drain valve.

Further, a reservoir is arranged below the drain valve and is communicated with the main pipeline or an external water source through a circulating pipeline.

Furthermore, a filtering piece is arranged in the circulating pipeline and used for filtering impurities in the circulating pipeline.

Further, still include the treater, be equipped with level sensor in the water-locator, when the water-locator was full of water, trigger level sensor, water inlet main valve, drain valve, bypass valve and governing valve all with treater electric connection.

Furthermore, the inner wall of the water distribution hole is funnel-shaped, and the aperture of the water outlet end of the water distribution hole is larger than that of the water inlet end of the water distribution hole.

A water-cooling tower water distributor backwashing method comprises the following steps:

a main pipeline is arranged to communicate the water distributor with an external water source, and a main water inlet valve and a regulating valve are connected in series on the main pipeline; connecting a bypass valve in series on a branch pipeline, wherein one end of the branch pipeline is communicated with one end of the main pipeline close to the external water source, and the other end of the branch pipeline is communicated with the part of the main pipeline between the main water inlet valve and the regulating valve;

s1: when the bypass valve and the drain valve are closed, the external water source can flow to the water distributor through the main pipeline by opening the main water inlet valve and the regulating valve;

s2: when the water distributor is blocked, the water inlet main valve is closed firstly, the bypass valve is opened, and the external water source flows into the water distributor through the bypass valve and the regulating valve;

s3: and when the liquid level of the water distributor is higher than the horizontal height of the water outlet of the drain valve, the drain valve is opened, and the water in the water distributor is discharged through the water distribution hole, the main pipeline and the drain valve in sequence.

Further, when the drain valve is opened, the regulating valve is fully opened at the same time.

Further, the water distribution holes of the water distributor are completely unblocked with the main pipeline, when the water pressure at the water inlet end of the main pipeline is a fixed value X which is larger than zero and the openness of the main water inlet valve and the regulating valve is a fixed value Y which is larger than zero, the flow speed of the outlet of the main pipeline is measured, and the flow speed is used as a reference value;

when the water distributor works, when the water pressure of the main pipeline is X and the opening degree of the main water inlet valve and the regulating valve is a fixed value Y which is larger than the fixed value Y, measuring the flow speed of the outlet of the main pipeline as an actual measured value, and executing S2 when the ratio of the reference value to the actual measured value is larger than Z;

wherein Z is a constant greater than 1.

The invention has the beneficial effects that:

the back washing system of the invention forms a siphon effect by arranging the drain valve, so that water outside the water distribution holes flows back into the water distributor to back wash the water distribution holes, thereby achieving the purpose of dredging. The system has the outstanding characteristics that the back flush is formed through siphon without disassembling the water distributor, so that water can be supplied to the bottom of the water cooling tower while the water distributor performs the back flush, and the operation of the air separation equipment is not interfered while the dredging is performed.

Drawings

The invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a water distributor backwashing system of the present application.

The parts corresponding to the reference numerals in the figures are as follows:

1. a main water inlet valve; 2. a drain valve; 3. a main pipeline; 4. adjusting a valve; 5. a water cooling tower; 6. branch pipelines; 7. a bypass valve; 8. an external water source.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

A water-cooling tower 5 water distributor back flush system includes: a water inlet main valve 1, a drain valve 2, a bypass valve 7 and a regulating valve; the water inlet main valve 1 and the regulating valve are connected in series on the main pipeline 3, and the bypass valve 7 is connected in series on the branch pipeline 6; one end of the main pipeline 3 is communicated with an external water source 8, and the other end is communicated with a water distributor; one end of the branch pipeline 6 is communicated with one end of the main pipeline 3 close to an external water source 8, and the other end is communicated with the part of the main pipeline 3 between the main water inlet valve 1 and the regulating valve; the drain valve 2 is connected in series between the water inlet main valve 1 and the regulating valve, wherein when the water distributor is filled with water, the water level of the water distributor is higher than the level of the water outlet of the drain valve 2.

The working principle of the backwash system of the present invention is described in detail below, when the water distributor is operating normally, the main water inlet valve 1 and the regulating valve are opened, the external water source 8 enters the water distributor through the main water inlet valve 1 and the regulating valve in sequence from the main pipe 3, and the bypass valve 7 can also be opened. When the water distribution holes of the water distributor are blocked, the water inlet main valve 1 can be closed, the bypass valve 7 is opened, and the external water source 8 continuously supplies water to the water distributor through the bypass valve 7 until the water distributor is in a full water level state. Then the bypass valve 7 is closed, the drain valve 2 is opened, and as the water level of the water distributor is higher than the level of the water outlet of the drain valve 2, a siphon effect is formed between the drain hole of the drain valve 2 and the water distribution hole, once the drain valve 2 is opened, water outside the water distribution hole reversely flows into the water distribution hole, and the effect of flushing the blocked part is achieved.

After the reverse flushing is carried out once, if the blockage condition still exists, the drain valve 2 is closed again, the bypass valve 7 and the main water inlet valve 1 are opened, and water is conveyed to the water distributor again. After the water distributor is filled, the drain valve 2 is opened again, the bypass valve 7 and the main water inlet valve 1 are closed, and backwashing is performed again. The reciprocating positive and negative water delivery and flushing can obviously relieve the blockage condition.

In conclusion, the backwashing system of the invention forms a siphon effect by arranging the drain valve 2, so that water outside the water distribution holes flows back into the water distributor to backwash the water distribution holes, thereby achieving the purpose of dredging. The system has the outstanding characteristics that the back flush is formed through siphon without disassembling the water distributor, so that water can be supplied to the bottom of the water cooling tower 5 while the water distributor performs the back flush, and the operation of the air separation plant is not interfered while the dredging is performed.

Further, a reservoir is arranged below the drain valve 2 and is communicated with the main pipeline 3 or an external water source 8 through a circulating pipeline.

Furthermore, a filtering piece is arranged in the circulating pipeline and used for filtering impurities in the circulating pipeline.

In addition, the system also comprises a processor, a liquid level sensor is arranged in the water distributor, when the water distributor is filled with water, the liquid level sensor is triggered, and the liquid level sensor, the water inlet main valve 1, the drain valve 2, the bypass valve 7 and the regulating valve are all electrically connected with the processor. Through the arrangement of the biological filter, when the liquid level sensor detects that the water distributor is full of water, a signal is transmitted to the processor, the processor receives the signal and outputs a control model to the water inlet main valve 1 and the bypass valve 7,

more specifically, the inner wall of the water distribution hole is funnel-shaped, and the aperture of the water outlet end of the water distribution hole is larger than that of the water inlet end of the water distribution hole. Through the arrangement, water flow outside the water distribution holes can smoothly flow into the water distribution holes during backwashing, so that the reverse flow rate during backwashing is larger, and the dredging effect is better.

A backwashing method for a water distributor of a water cooling tower 5 comprises the following steps:

the main distribution pipeline 3 is communicated with the water distributor and an external water source 8, and a main water inlet valve 1 and a regulating valve are connected on the main distribution pipeline 3 in series; the bypass valve 7 is connected in series on the branch pipeline 6, one end of the branch pipeline 6 is communicated with one end of the main pipeline 3 close to an external water source 8, and the other end of the branch pipeline is communicated with the part of the main pipeline 3 between the main water inlet valve 1 and the regulating valve;

s1: when the bypass valve 7 and the drain valve 2 are closed, an external water source 8 can flow to the water distributor through the main pipeline 3 by opening the main water inlet valve 1 and the regulating valve;

s2: when the water distributor is blocked, the water inlet main valve 1 is closed, the bypass valve 7 is opened, and an external water source 8 flows into the water distributor through the bypass valve 7 and the regulating valve;

s3: when the liquid level of the water distributor is higher than the level of the water outlet of the drain valve 2, the drain valve 2 is opened, and the water in the water distributor is discharged through the water distribution holes, the main pipeline 3 and the drain valve 2 in sequence.

More specifically, the regulating valve is fully opened while the drain valve 2 is opened.

The water distribution holes of the water distributor and the main pipeline 3 are completely unblocked, when the water pressure at the water inlet end of the main pipeline 3 is a fixed value X which is larger than zero and the openness of the main water inlet valve 1 and the regulating valve is a fixed value Y which is larger than zero, the flow speed of the outlet of the main pipeline 3 is measured, and the flow speed is used as a reference value;

when the water distributor works, when the water pressure of the main pipeline 3 is X and the openings of the main water inlet valve 1 and the regulating valve are larger than a fixed value Y, measuring the flow speed of the outlet of the main pipeline 3 as an actual measured value, and executing S2 when the ratio of the reference value to the actual measured value is larger than Z; wherein Z is a constant greater than 1.

That is, before operation, the flow rate at the outlet of the main pipe 3 at a specific inlet water pressure and a specific opening degree of the regulating valve and the inlet water main valve 1 is measured in advance, and the measured flow rate is used as a reference value. When the water distributor works, detection is needed, when each parameter is adjusted to the specific value, the actual flow velocity of the main pipeline 3 is measured and compared with a reference value, and whether the water distribution holes are blocked or not can be judged.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.