阅读说明：本技术 具有管道在线冲洗功能的混能换热机组的清洗方法 (Cleaning method of hybrid energy heat exchange unit with online pipeline flushing function ) 是由 张世钰 唐宝洪 王院生 王元 孟祥斌 王贺贺 蔡先航 于 2019-10-08 设计创作，主要内容包括：本发明公开了一种具有管道在线冲洗功能的混能换热机组的清洗方法,所述混能换热机组包括二次侧换热器以及与二次侧换热器并联的混能器,所述清洗方法包括以下步骤：关闭二次侧换热器与混能器之间连通的管道,阻止管道中的水流向二次侧换热器；对管道以及混能器进行清洗；过滤管道中水体含有的杂质,检测过滤前和过滤后的压差；当压差大于设定值时,清除过滤的杂质,向管道中补充清洁水,再次进行步骤2-4；当压差小于设定值时,开启二次侧换热器与混能器之间连通的管道,通过设立混能器实现二网管道的清洗。(The invention discloses a cleaning method of a hybrid energy heat exchange unit with a pipeline online flushing function, wherein the hybrid energy heat exchange unit comprises a secondary side heat exchanger and an energy mixer connected with the secondary side heat exchanger in parallel, and the cleaning method comprises the following steps: closing a pipeline communicated between the secondary side heat exchanger and the energy mixer, and preventing water in the pipeline from flowing to the secondary side heat exchanger; cleaning the pipeline and the energy mixer; filtering impurities contained in a water body in the pipeline, and detecting the pressure difference before and after filtering; when the pressure difference is larger than the set value, removing the filtered impurities, supplementing clean water into the pipeline, and performing the step 2-4 again; when the pressure difference is smaller than a set value, a pipeline communicated between the secondary side heat exchanger and the energy mixer is opened, and the cleaning of the two-network pipeline is realized by arranging the energy mixer.)

1. A cleaning method of a hybrid energy heat exchange unit with a pipeline online flushing function is disclosed, the hybrid energy heat exchange unit comprises a secondary side heat exchanger and an energy mixer connected with the secondary side heat exchanger in parallel, and the cleaning method is characterized by comprising the following steps:

1) closing a pipeline communicated between the secondary side heat exchanger and the energy mixer, and preventing water in the pipeline from flowing to the secondary side heat exchanger;

2) cleaning the pipeline and the energy mixer;

3) filtering impurities contained in a water body in the pipeline, and detecting the pressure difference before and after filtering;

4) when the pressure difference is larger than the set value, removing the filtered impurities, supplementing clean water into the pipeline, and performing the step 2-4 again; and when the pressure difference is smaller than a set value, opening a pipeline communicated between the secondary side heat exchanger and the energy mixer.

2. The cleaning method of the hybrid energy heat exchanger unit with the online pipeline flushing function according to claim 1, characterized by comprising the following steps: when the pipeline and the energy mixer are cleaned, the water in the pipeline is pressurized.

Technical Field

The invention relates to the technical field of heat exchanger units, in particular to a cleaning method of a mixed energy heat exchanger unit with a pipeline online flushing function.

Background

The traditional plate type heat exchanger unit mainly comprises a plurality of plate type heat exchangers, a circulating pump, a water replenishing pump, a valve and a filter.

Disclosure of Invention

In order to solve the technical problems, the invention provides a cleaning method of a mixed energy heat exchanger unit with a pipeline online flushing function.

In order to solve the technical problems, the invention adopts the following technical scheme:

a cleaning method of a hybrid energy heat exchanger unit with a pipeline online flushing function comprises a secondary side heat exchanger and an energy mixer connected with the secondary side heat exchanger in parallel, and comprises the following steps:

1) closing a pipeline communicated between the secondary side heat exchanger and the energy mixer, and preventing water in the pipeline from flowing to the secondary side heat exchanger;

2) cleaning the pipeline and the energy mixer;

3) filtering impurities contained in a water body in the pipeline, and detecting the pressure difference before and after filtering;

4) when the pressure difference is larger than the set value, removing the filtered impurities, supplementing clean water into the pipeline, and performing the step 2-4 again; and when the pressure difference is smaller than a set value, opening a pipeline communicated between the secondary side heat exchanger and the energy mixer.

Specifically, when the pipeline and the energy mixer are cleaned, water in the pipeline is pressurized.

Compared with the prior art, the invention has the beneficial technical effects that:

1. through closing the pipeline between energy mixing ware and the secondary side heat exchanger, add medicine and wash on line to energy mixing ware and two network management pipelines, improved and washed efficiency, avoid frequently dismantling the equipment life loss that leads to, solve work loaded down with trivial details, the difficult scheduling problem of cleaning performance monitoring of traditional secondary side pipe network washing mode, reduce simultaneously and wash the labour cost more than 50%.

Drawings

FIG. 1 is a schematic flow diagram of a cleaning method of the present invention;

FIG. 2 is a schematic diagram of a two-network pipeline structure according to the present invention.

Detailed Description

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a method for cleaning a hybrid energy heat exchanger unit with a pipeline online flushing function, the hybrid energy heat exchanger unit comprising a secondary side heat exchanger and an energy mixer connected in parallel with the secondary side heat exchanger, the method for cleaning comprising the following steps:

s1: closing a pipeline communicated between the secondary side heat exchanger and the energy mixer, and preventing water in the pipeline from flowing to the secondary side heat exchanger;

s2: cleaning the pipeline and the energy mixer;

s3: filtering impurities contained in a water body in the pipeline, and detecting the pressure difference before and after filtering;

s4: when the pressure difference is larger than the set value, removing the filtered impurities, supplementing clean water into the pipeline, and performing the step 2-4 again; and when the pressure difference is smaller than a set value, opening a pipeline communicated between the secondary side heat exchanger and the energy mixer.

Specifically, when the pipeline and the energy mixer are cleaned, water in the pipeline is pressurized.

The method is described below with reference to the heat exchanger unit on which the method is based.

As shown in fig. 2, a secondary side energy mixing heat exchange unit comprises a two-network water return pipe 20, a two-network water supply pipe 30, a secondary side heat exchanger 10, a second circulating pump 50, a first circulating pump 60 and an energy mixer 40, wherein the secondary side heat exchanger is provided with a heat exchanger water inlet 12 and a heat exchanger water outlet 11, the second circulating pump is provided with a second circulating pump water inlet 51 and a second circulating pump water outlet 52, the first circulating pump is provided with a first circulating pump water inlet 61 and a first circulating pump water outlet 62, and the energy mixer comprises a tank body with a hollow interior, and a first water inlet 41, a first water outlet 42, a second water inlet 43 and a second water outlet 44 which are communicated with the tank body;

the two-network water return pipe 20 is communicated with a first circulating pump water inlet 61, a first circulating pump water outlet 62 is communicated with a first water inlet 41, a first water outlet 42 is communicated with a second circulating pump water inlet 51, a second circulating pump water outlet 52 is communicated with a heat exchanger water inlet 12, a heat exchanger water outlet 11 is communicated with a second water inlet 43, a second water outlet 44 is communicated with a two-network water supply pipe 30, the heat exchanger unit controls the amount of low-temperature water entering the secondary side heat exchanger through a second circulating pump, so that the residual low-temperature water flows into the energy mixing device, and an energy mixing area formed by mixing the low-temperature water and high-temperature water flowing into the second water inlet is formed in the tank body.

Municipal water with lower temperature flows in from the two-network water return pipe, obtains heat in the secondary side heat exchanger, flows into the two-network water supply pipe after the temperature rises, and is supplied to each community for use; when the air temperature is higher, the water temperature in the two-network water supply pipe does not need to be too high, an energy mixer is communicated between the two-network water return pipe and the two-network water supply pipe, the power of a second circulating pump is controlled according to the difference value of the temperature in the two-network water supply pipe and a set value, part of low-temperature water enters the secondary side heat exchanger, and part of low-temperature water flows into the energy mixer and is mixed with high-temperature water, so that the temperature in the two-network water supply pipe is reduced, only part of water is heated, the internal resistance of the secondary side heat exchanger is reduced, the energy consumption of a pump body is reduced, and electric energy and heat energy; because need not high-power circulating pump, the volume of second circulating pump, first circulating pump and moisturizing pump is less, and establishes ties and use, and area is little, the installation of being convenient for.

The second circulating pump is used for controlling the water quantity entering the secondary side heat exchanger, the first circulating pump provides circulating power of the secondary side pipe network, low-temperature water which cannot pass through the secondary side heat exchanger is output to the two-network water supply pipe through the energy mixer and is mixed with high-temperature water in the two-network water supply pipe, when the outside air temperature is high and the heat of the secondary network is surplus, the heating temperature can be controlled according to the mixing proportion of the low-temperature water and the high-temperature water, the whole pressure drop of the secondary side is reduced to 30 ~ 40KPa through the mixing and conveying of the second circulating pump, the first circulating pump and the energy mixer, and the electricity consumption is saved by 20% to ~ 30%.

As shown in fig. 2, the heat exchanger unit further includes a degassing and decontamination device 70 for filtering impurities in the water body, the degassing and decontamination device includes a degassing and decontamination tank body, a decontamination water inlet 71 and a decontamination water outlet 72 communicated with the degassing and decontamination tank body, the decontamination water inlet 71 is communicated with the two-net water return pipe 20, the decontamination water outlet 72 is communicated with the first circulating pump water inlet 61, and the bottom of the degassing and decontamination tank body is communicated with a second blow-down valve.

Degassing decontamination plant is inside to have the filter screen, can filter the impurity in the water to concentrate impurity and deposit scrubbing jar body bottom, when the impurity of scrubbing jar body bottom was too much, control second blowoff valve was opened, derived impurity, accomplished the purification of water.

As shown in fig. 2, a first sewage discharge valve communicated with the tank body is arranged at the bottom of the energy mixer 40, and when more water impurities are concentrated at the bottom of the tank body of the energy mixer, the first sewage discharge valve is controlled to be opened to discharge the water impurities.

As shown in fig. 2, a chemical adding device is arranged in the energy mixer 40, the chemical adding device is provided with a chemical storage tank, a cleaning chemical is stored in the chemical storage tank, a chemical adding port 45 communicated with the chemical storage tank is arranged on the energy mixer, when deep cleaning is required to be performed on the pipeline or the secondary side heat exchanger, the chemical adding device is controlled to input the cleaning chemical into the energy mixer, the cleaning chemical can react with dirt on the pipe wall to reduce the thickness of the dirt, a check valve is arranged at the front end of the chemical adding device to prevent water of the energy mixer from entering the chemical adding device and avoid the cleaning chemical in the chemical storage tank from being polluted, the chemical storage tank in the chemical adding device is communicated with the chemical adding port through the pipeline, when the cleaning chemical in the chemical storage tank is insufficient, the cleaning chemical is added through the chemical adding port without opening the energy mixer to add chemicals, so that the maintenance time is saved, the maintenance cost is reduced.

As shown in fig. 2, the heat exchanger unit of the secondary energy mixer further includes a water replenishing pump 22, the water replenishing pump has a water supply port 23, the water supply port is communicated with the first circulating pump water inlet 61, and the water replenishing pump supplies cleaning water to the first circulating pump water inlet through the water supply port.

As shown in fig. 2, the heat exchanger unit further includes a first electromagnetic valve 31 for controlling on-off between the heat exchanger water outlet 11 and the second water inlet 43, and a second electromagnetic valve 21 for controlling on-off between the first water outlet 42 and the second circulating pump water inlet 51.

Because the inside runner of secondary side heat exchanger is complicated, rivers are slow, but the pipeline dirt is comparatively stubborn, needs high-speed rivers to erode and just can wash thoroughly, first solenoid valve, second solenoid valve, energy mixing ware, degasification scrubbing device mutually support, can realize washing of secondary side pipeline, and specific operating method is: in the step 1 of the washing method, a pipeline communicated between a secondary side heat exchanger and an energy mixer is closed by closing a first electromagnetic valve and a second electromagnetic valve, water in the pipeline is prevented from flowing to the secondary side heat exchanger, water in a two-net water return pipe can only flow to the energy mixer, the energy mixer is hollow, a flow channel is simple, the flow speed is high, dirt in the pipeline can be effectively removed by high-speed water flow, then a first circulating pump is started to pressurize the water in the pipeline, the water in the two-net water return pipe, a two-net water supply pipe and the energy mixer is driven by the pressurization of the first circulating pump to wash impurities attached to the pipe wall, a filter screen in a degassing and decontamination device can filter the impurities in the water, the pressure difference between a decontamination water inlet and a decontamination water outlet of the degassing and decontamination device is detected, when the pressure difference is greater than a set value, the impurities in the water in the pipeline are still more, and the water with more impurities passes through the filter screen in the, forming a pressure difference between the decontamination water inlet and the decontamination water outlet, opening a second electromagnetic valve at the bottom of the degassing and decontamination device to discharge impurities, and simultaneously opening a water replenishing pump to replenish water and perform flushing again; when the pressure difference is smaller than a set value, the water replenishing pump is closed, and the first electromagnetic valve and the second electromagnetic valve are opened simultaneously to complete the flushing of the two-network water return pipe, the energy mixer and the two-network water supply pipe; the secondary side pipe network flushing method has the advantages that a large amount of labor is generally needed for flushing the secondary side pipe network, operation steps are complex, time and labor are consumed, the secondary side pipe network can be flushed on line by using the cooperation of the first electromagnetic valve, the second electromagnetic valve, the first circulating pump, the energy mixer and the degassing and decontamination device, flushing effect monitoring can be carried out, the problems that a traditional secondary side pipe network flushing mode is complex in work, the flushing effect monitoring is difficult and the like are solved, and meanwhile, the flushing labor cost is reduced by more than 50%.

As shown in fig. 2, a backwater shut-off valve 24 is arranged on the two-network backwater pipe 20, a water supply shut-off valve 32 is arranged on the two-network water supply pipe 30, the backwater shut-off valve is used for controlling the on-off of the two-network backwater pipe, the water supply shut-off valve is used for controlling the on-off of the two-network water supply pipe, and the on-off control and the off-off control of the heat exchange unit and the external water circulation are realized through the opening and closing of the backwater shut-off valve and the water supply shut-off valve.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.