CN110893409A - Waste heat circulating water cleaning pre-filming system and method thereof - Google Patents
Waste heat circulating water cleaning pre-filming system and method thereof Download PDFInfo
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- CN110893409A CN110893409A CN201911331043.7A CN201911331043A CN110893409A CN 110893409 A CN110893409 A CN 110893409A CN 201911331043 A CN201911331043 A CN 201911331043A CN 110893409 A CN110893409 A CN 110893409A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention belongs to the field of chemical processes, and particularly relates to a waste heat circulating water cleaning pre-filming system and a method thereof.A main circulating water supply pipeline of an adsorption device area is connected to a cooler of a generator lubricating machine through a branch pipeline of first circulating water supply; the adsorption device district circulating water supplies water main line and is connected to vacuum pump plate cooler through second circulating water supplies water branch pipeline, and interim water tank is connected to adsorption device district circulating water supplies water main line through wasing the water supply pipeline, washs and sets up the pump on the water supply pipeline, washs the return water pipeline and leads to interim water tank by adsorption device district circulating water return water main line. The pipeline and the heat exchanger can be prevented from being corroded, the service lives of the heat exchanger and the pipeline are prolonged, leakage risks are avoided, and heat exchange efficiency is improved.
Description
Technical Field
The invention belongs to the field of chemical processes, and particularly relates to a waste heat circulating water cleaning and pre-filming system and a method thereof.
Background
The internal pipeline of the main valve of the boundary region of the circulating water system, a generator lubricating machine cooler, a vacuum pump plate cooler and a generator cooler need to be cleaned and pre-filmed regularly, if the internal pipeline is not washed, the deposition corrosion can cause the leakage of the pipeline and other positions, and the safety risk is higher. In addition, because the long-time operation of equipment produces incrustation scale, influences heat exchanger heat exchange efficiency to and change heat exchanger, heat exchange tube lead to deposit corrosion phenomenon, produce the leak source.
Disclosure of Invention
In view of the defects in the background art, the invention provides a waste heat circulating water cleaning pre-filming system which can avoid corrosion of pipelines and heat exchangers, prolong the service lives of the heat exchangers and the pipelines, avoid leakage risks and enhance heat exchange efficiency.
In order to achieve the above object, in one aspect, the invention provides a waste heat circulating water cleaning pre-filming system, which includes an adsorption device region circulating water supply main pipeline, a first circulating water supply branch pipeline, a second circulating water supply branch pipeline, a third circulating water supply branch pipeline, a generator lubricator cooler, a vacuum pump plate cooler, a generator cooler, a first circulating water return branch pipeline, a second circulating water return branch pipeline, a third circulating water return branch pipeline, an adsorption device region circulating water return main pipeline, a temporary water tank, a pump, a cleaning water supply pipeline, and a cleaning water return pipeline; the main circulating water supply pipeline of the adsorption device area is connected to a generator lubricating machine cooler through a first circulating water supply branch pipeline, and the generator lubricating machine cooler is connected to the main circulating water return pipeline of the adsorption device area through a first circulating water return branch pipeline; the main circulating water supply pipeline of the adsorption device area is connected to the vacuum pump plate cooler through a second circulating water supply branch pipeline, and the vacuum pump plate cooler is connected to the main circulating water return pipeline of the adsorption device area through a second circulating water return branch pipeline; the main circulating water supply pipeline of the adsorption device area is connected to a generator cooler through a third circulating water supply branch pipeline, and the generator cooler is connected to the main circulating water return pipeline of the adsorption device area through a third circulating water return branch pipeline; the temporary water tank is connected to the circulating water supply main pipeline of the adsorption device area through a cleaning water supply pipeline, a pump is arranged on the cleaning water supply pipeline, and the cleaning water return pipeline is led to the temporary water tank through the circulating water return main pipeline of the adsorption device area.
Furthermore, a circulating water pump outlet valve is arranged on the cleaning water supply pipeline, and a circulating water return valve is arranged on the cleaning water return pipeline.
Furthermore, the adsorption device district circulating water supply main pipeline is last to set gradually first valve, first guide drenches valve, second valve, the washing water supply line connects in second valve low reaches, adsorption device district circulating water return main pipeline is last to set gradually third valve, third guide drenches valve, fourth valve, the washing return water pipeline connects in the third valve upper reaches.
Further, the first valve and the third valve are butt-clamping butterfly valves; the second valve and the fourth valve are gate valves.
Furthermore, a fifth valve and a sixth valve are respectively arranged on the first circulating water supply branch pipeline and the first circulating water return branch pipeline, and the front part of the fifth valve is connected with the rear part of the sixth valve through a temporary pipeline.
Furthermore, a seventh valve and an eighth valve are respectively arranged on the second circulating water supply branch pipeline and the second circulating water return branch pipeline.
Furthermore, a ninth valve bank is arranged on the third circulating water supply branch pipeline, and a tenth valve is arranged on the third circulating water return branch pipeline.
Further, the ninth valve group comprises a ninth valve, a Y-type filter and a fourteenth valve which are arranged in sequence; a front pressure gauge is arranged between the ninth valve and the Y-shaped filter, a rear pressure gauge is arranged between the Y-shaped filter and the fourteenth valve, a cross line is arranged between the upstream of the ninth valve and the downstream of the fourteenth valve, and an eleventh valve is arranged on the cross line.
Further description of the invention: the method for cleaning the pre-film comprises the following steps:
first, water rinsing: the silt and impurities deposited in the circulating water pipeline are washed out, so that conditions are provided for chemical cleaning.
Secondly, chemical cleaning: the cleaning agent (acid) is added into the circulating water to clean oil stains, corrosion products, dirt, floating rust and the like in a heat exchanger and a pipeline in the system, so that the surface of the system is activated, and a foundation is laid for pre-filming.
Finally, chemical pre-filming: in order to protect the metal surface from corrosion, certain components in the chemical agent form a complex with divalent metal ions (such as Ca2+, Zn2+, Fe2+ and the like) in the cooling water, so that a very thin and dense protective film is formed on the metal surface and is firmly adhered to the metal surface, thereby inhibiting the corrosion of circulating water on the metal pipe and preventing the corrosion of microorganisms.
On the other hand, the technical scheme provided by the invention is a waste heat circulating water cleaning and pre-filming method, which comprises the following steps:
step 1: confirming that a first pilot valve and a second pilot valve of a main circulating water supply line of an adsorption device area are closed, and confirming that a third pilot valve and a fourth pilot valve of a main circulating water return line of the adsorption device area are closed; disconnecting a second valve of a main water supply pipeline of circulating water in the adsorption device area; disconnecting a third valve of the circulating water return main pipeline of the adsorption device area;
step 2: opening a second valve of the main circulating water supply pipeline of the adsorption device area, flushing the main circulating water supply pipeline of the adsorption device area with circulating water from the source of the main circulating water supply pipeline of the adsorption device area by using water, and controlling the pressure of a circulating water pipe network;
opening a third valve of the main circulating water return line of the adsorption device area, and under the action of the pressure of a circulating water pipe network of the adsorption device area, washing the main circulating water return line of the adsorption device area with water through circulating water at the source of the main circulating water return line of the adsorption device area, so as to control the pressure of the circulating water pipe network;
and step 3: the pressure of a circulating water pipe network in an adsorption device area is ensured to be 0.5-0.7Mpa by adjusting the opening degrees of the second valve and the third valve, and the circulating water pipe network is flushed by water in a matching device;
and 4, step 4: sampling by using a glass bottle, and visually observing the water cleanness without obvious impurities;
and 5: temporarily connecting the second valve open position and the third valve open position;
the water washing steps of the circulating water branch pipe are as follows:
step 1: the circulating water supply and return valves of the lubricating oil cooler of the generator set are disconnected; disconnecting a front flange of an inlet filter of a vacuum pump plate cooler and a rear flange of a water return valve; disconnecting a water supply valve and a water return valve of a generator cooler;
step 2: punching in sequence: firstly, washing the circulating water of the lubricating oil cooler of the hair washing motor set to supply the circulating water to a water return pipeline; flushing a circulating water supply and return pipeline of the vacuum pump plate cooler; washing a circulating water supply and return pipeline of a generator cooler;
and step 3: before flushing, the second valve and the third valve are opened, and during flushing, the large branch valves are opened slowly respectively;
and 4, step 4: the pressure of the circulating water pipe network in the adsorption device area is ensured to be 0.5-0.7Mpa by adjusting the opening degrees of the second valve and the third valve;
and 5: the sample was taken after passing through the battery limit valve with a glass bottle.
A pipeline recovery preparation step and a dosing cleaning program are carried out:
the pipeline restoration preparing step includes:
step 1: removing a second valve of a main water supply pipeline of circulating water in the adsorption device area, and connecting a temporary water tank at the position of the second valve with a pump;
step 2: supplying the circulating water of the generator cooler to a water return valve and a flange for recovery;
and step 3: the circulating water supply and return valve of the vacuum pump plate cooler recovers;
and 4, step 4: connecting a circulating water supply pipeline and a circulating water pipeline of a generator lubricating oil cooler with a temporary pipeline directly to isolate a white steel pipe bundle of the cooler;
the dosing cleaning procedure comprises:
step 1: the circulating water cleaning agent is adjusted and prepared, and the medicine chest and the pump are ready;
step 2: connecting the cleaning water return pipeline with a third valve;
and step 3: opening a circulating water inlet and outlet of each branch heat exchanger, and keeping the outlet pressure of a stable pump at 0.45-0.55 Mpa;
and 4, step 4: cleaning;
and 5: analyzing once within several hours until the iron content and the turbidity are stable and do not rise any more;
step 6: and after the cleaning is finished, draining the pipeline water, adding water again, and preparing to perform membrane formation.
The invention has the beneficial effects that: avoid pipeline and heat exchanger corruption, increase heat exchanger and pipeline life, avoid leaking the risk, strengthen heat exchange efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present invention:
in the figure: 1. an adsorption device area circulating water supply main pipeline, 2, a first circulating water supply branch pipeline, 3, a second circulating water supply branch pipeline, 4, a third circulating water supply branch pipeline, 5, a generator lubricator cooler, 6, a vacuum pump plate cooler, 7, a generator cooler, 8, a first circulating water return branch pipeline, 9, a second circulating water return branch pipeline, 10, a third circulating water return branch pipeline, 11, an adsorption device area circulating water return main pipeline, 12, a temporary water tank, 13, a pump, 14, a cleaning water supply pipeline, 15, a cleaning water return pipeline, 16, a first valve, 17, a first pilot valve, 18, a second pilot valve, 19, a second valve, 20, a third valve, 21, a third pilot valve, 22, a fourth pilot valve, 23, a fourth valve, 24, a fifth valve, 25, a sixth valve, 26, a temporary pipeline, 27. seventh valve, 28, eighth valve, 29, ninth valve group, 29.1, ninth valve, 29.2, Y-type filter, 29.3, fourteenth valve, 29.4, front pressure gauge, 29.5, back pressure gauge, 29.6, overline, 29.7, eleventh valve, 30, tenth valve, 31, circulating water return valve, 32, circulating water pump outlet valve.
Detailed Description
The structure of the invention is further explained in the following with the attached drawings of the specification.
The waste heat circulating water cleaning pre-filming system comprises an adsorption device area circulating water supply main pipeline 1, a first circulating water supply branch pipeline 2, a second circulating water supply branch pipeline 3, a third circulating water supply branch pipeline 4, a generator lubricating machine cooler 5, a vacuum pump plate type cooler 6, a generator cooler 7, a first circulating water return branch pipeline 8, a second circulating water return branch pipeline 9, a third circulating water return branch pipeline 10, an adsorption device area circulating water return main pipeline 11, a temporary water tank 12, a pump 13, a cleaning water supply pipeline 14 and a cleaning water return pipeline 15;
the main circulating water supply pipeline 1 of the adsorption device area is connected to a generator lubricating machine cooler 5 through a first circulating water supply branch pipeline 2, and the generator lubricating machine cooler 5 is connected to a main circulating water return pipeline 11 of the adsorption device area through a first circulating water return branch pipeline 8;
the main circulating water supply pipeline 1 of the adsorption device area is connected to a vacuum pump plate cooler 6 through a second circulating water supply branch pipeline 3, and the vacuum pump plate cooler 6 is connected to a main circulating water return pipeline 11 of the adsorption device area through a second circulating water return branch pipeline 9;
the main circulating water supply pipeline 1 of the adsorption device area is connected to a generator cooler 7 through a third circulating water supply branch pipeline 4, and the generator cooler 7 is connected to a main circulating water return pipeline 11 of the adsorption device area through a third circulating water return branch pipeline 10;
the temporary water tank 12 is connected to the adsorption device zone circulating water supply main pipeline 1 through a cleaning water supply pipeline 15, a pump 13 is arranged on the cleaning water supply pipeline 14, and the cleaning water return pipeline 15 is led to the temporary water tank 12 through an adsorption device zone circulating water return main pipeline 11.
Further, a circulating water pump outlet valve 32 is arranged on the cleaning water supply line 14, and a circulating water return valve 31 is arranged on the cleaning water return line 15.
Further, a first valve 16, a first guiding and spraying valve 17, a second guiding and spraying valve 18 and a second valve 19 are sequentially arranged on the main circulating water supply line 1 of the adsorption device area, the cleaning water supply line 15 is connected to the downstream of the second valve 19, a third valve 20, a third guiding and spraying valve 21, a fourth guiding and spraying valve 22 and a fourth valve 23 are sequentially arranged on the main circulating water return line 11 of the adsorption device area, and the cleaning water return line 15 is connected to the upstream of the third valve 20.
Further, the first valve 16 and the third valve 20 are butt-clamped butterfly valves; the second valve 19 and the fourth valve 23 are gate valves.
Furthermore, a fifth valve 24 and a sixth valve 25 are respectively arranged on the first circulating water supply branch pipe line 2 and the first circulating water return branch pipe line 8, and the front part of the fifth valve 24 is connected with the rear part of the sixth valve 25 through a temporary pipeline 26.
Further, a seventh valve 27 and an eighth valve 28 are respectively disposed on the second circulating water supply branch line 3 and the second circulating water return branch line 9.
Further, a ninth valve set 29 is arranged on the third circulating water supply branch line 4, and a tenth valve 30 is arranged on the third circulating water return branch line 10.
Further, the ninth valve set 29 includes a ninth valve 29.1, a Y-shaped filter 29.2, and a fourteenth valve 29.3, which are sequentially disposed; a front pressure gauge 29.4 is arranged between the ninth valve 29.1 and the Y-shaped filter 29.2, a rear pressure gauge 29.5 is arranged between the Y-shaped filter 29.2 and the fourteenth valve 29.3, a cross line 29.6 is arranged between the upstream of the ninth valve 29.1 and the downstream of the fourteenth valve 29.3, and an eleventh valve 29.7 is arranged on the cross line.
The front pressure gauge 29.4 and the rear pressure gauge 29.5 are mainly used for monitoring the front and rear pressure difference of the Y-shaped filter 29.2, monitoring the flow of the filter through the pressure difference and preventing the filter from being blocked.
The waste heat circulating water cleaning and pre-filming method specifically comprises the following steps:
the washing steps of the main pipeline 1 for supplying circulating water to the adsorption device area and the main pipeline 11 for returning circulating water to the adsorption device area are as follows:
step 1: and confirming that the first guide shower valve 17 and the second guide shower valve 18 of the main circulating water supply line 1 of the adsorption device area are closed, and confirming that the third guide shower valve 21 and the fourth guide shower valve 22 of the main circulating water return line 11 of the adsorption device area are closed.
The east side (position A in the figure) of the second valve 19 of the main water supply pipeline 1 for circulating water in the adsorption device area is disconnected; disconnecting the east side (position B in the figure) of the third valve 20 of the main circulating water return line 11 of the adsorption device area; an M20 bolt was inserted at the break to prepare for the wash drain. The pipeline is disconnected in the steps, residual media in the pipeline are emptied, and the bolt is inserted to play a role in preventing the pipeline from being communicated again.
Step 2: opening a second valve 19 of the main circulating water supply pipeline 1 of the adsorption device area, flushing the main circulating water supply pipeline 1 of the adsorption device area with water through circulating water at the source of the main circulating water supply pipeline 1 of the adsorption device area, and slowly opening the second valves 19 respectively to control the pressure of a circulating water pipe network, so as to prevent pressure fluctuation from influencing production;
the third valve 20 of the main pipeline 11 for circulating water backwater in the adsorption device area is opened, under the pressure action of the circulating water pipe network in the adsorption device area, circulating water from the main pipeline 11 for circulating water backwater in the adsorption device area is used for washing the main pipeline 11 for circulating water backwater in the adsorption device area, the third valve 20 is slowly opened respectively, the pressure of the circulating water pipe network is controlled, and pressure fluctuation is prevented to influence production.
And step 3: the pressure of the circulating water pipe network in the adsorption device area is ensured to be 0.5-0.7Mpa by adjusting the opening degrees of the second valve 19 and the third valve 20, and the circulating water pipe network is matched with the device for water washing.
And 4, step 4: after the glass bottle passes through the boundary area valve (A position and B position), sampling is carried out, and the water is visually inspected to be clear without obvious impurities.
And 5: the second valve 19 off position and the third valve 20 off position are temporarily connected in preparation for flushing the back branch circulation line.
The water washing steps of the circulating water branch pipe are as follows:
step 1: the circulating water supply and return valves (the fifth valve 24 and the sixth valve 25) of the lubricating oil cooler of the generator set are disconnected (position C, D);
disconnecting a front flange of a filter at the inlet of the vacuum pump plate cooler and a rear flange (E, F position) of a water return valve;
the generator cooler supply and return valves are disconnected (position G, H).
Step 2: punching in sequence: firstly, washing the circulating water of the lubricating oil cooler of the hair washing motor set to supply the circulating water to a water return pipeline; flushing a circulating water supply and return pipeline of the vacuum pump plate cooler; the generator cooler is flushed with circulating water for returning to the water pipeline.
It should be noted that the water supply pipelines of the three water supply pipelines all supply the circulating water at the source of the main pipeline 1 through the circulating water in the adsorption device area, and the flushing is carried out under the action of the water pressure; the return water pipelines of the three are flushed under the action of water pressure through circulating water at the source of the main circulating water return pipeline 1 of the adsorption device area.
And step 3: before flushing, the second valve 19 and the third valve 20 are opened fully, and during flushing, the large branch valves (the fifth valve 24, the sixth valve 25, the seventh valve 27, the eighth valve 28, the ninth valve set 29 and the tenth valve 30) are opened slowly respectively, so that the pressure of the circulating water pipe network is controlled well at any time, the pressure of the circulating water pipe network in the adsorption device area is ensured to be 0.5-0.7Mp, and pressure fluctuation is prevented.
And 4, step 4: the pressure of the circulating water pipe network in the adsorption device area is ensured to be 0.5-0.7Mpa by adjusting the opening degrees of the second valve 19 and the third valve 20, and the circulating water pipe network is matched with the device for water washing.
And 5: and (4) sampling after passing through a boundary valve by using a glass bottle, and visually observing the water to be clear without obvious impurities.
Cleaning and pre-filming:
pipeline rehabilitation preparation
Step 1: the second valve 19 of the main water supply line 1 for circulating water in the adsorption plant area is removed and the temporary water tank 12 and the pump 13 are connected to this position (position a).
Step 2: the generator cooler circulating water is supplied to a water return valve and a flange to be recovered (G, H position).
And step 3: the vacuum pump plate cooler circulating water is supplied to the water return valve to be recovered (E, F position).
And 4, step 4: the circulating water supply and return pipelines of the generator lubricating oil cooler are directly connected with the temporary pipeline 26 (position C, D), and the white steel pipe bundle of the cooler is isolated.
Cleaning procedure (oil and rust removal)
Step 1: the circulating water cleaning agent is adjusted and prepared, and the medicine box (temporary water tank 12) and the pump 13 are ready.
Step 2: the inlet and outlet lines (cleaning return line 15) of the pump 13 are connected to a third valve 20 for dosing, cleaning and pre-filming.
And step 3: and opening circulating water inlets and outlets of the branch heat exchangers, starting a circulating water pump according to the operating specification to establish internal circulation of the circulating water, and controlling the outlet pressure of the stable pump to be 0.45-0.55 Mpa.
And 4, step 4: in the cleaning process, excessive antifreezing can be carried out to ensure the flow rate of water, and the way-by-way cleaning is carried out for more than 8 hours to ensure the pre-filming effect.
And 5: the analysis was performed every 4 hours (test items: pH, conductivity, iron content, turbidity). After 16 hours, the sample was analyzed once in 2 hours until the iron content and turbidity stabilized and did not rise any more, indicating the end point of the washing. Step 6: after the cleaning is finished, the pipeline water is drained, the water in the temporary water tank 12 is drained to OD nearby, and the water tank is cleaned. And (5) adding water again to prepare for film forming.
Chemical pre-film
Step 1: confirming the completion of the ratio of the pre-film preparation. The chemical agent dosage calculation mode is as follows: drug addition amount (KG) = retained water amount (M3) × additive amount (ppm) ÷ 1000
Step 2: the circulating pump is started, and in order to ensure sufficient water flow rate in the pipeline equipment, the cooler can be circularly pre-filmed one by one.
And step 3: adding film forming agent, and continuously circulating for more than 48 hours.
And 4, step 4: in the film forming process, excessive antifreezing can be carried out to ensure the flow rate of water, and the film forming is carried out for more than 12 hours one by one to ensure the pre-film forming effect.
And 5: pre-filming completion monitoring method
The pretreated test piece is hung on the water tank film hanging device for monitoring, and the evaluation of the pre-film effect can adopt the following method: visual determination: the pre-filming effect is good, a carbon steel pipe slightly rusted is placed on the site of the running water of the temporary water tank 12, the floating rust is removed after cleaning, and the surface is in metallic luster after pre-filming.
Is normally used
Step 1: after the cleaning pre-membrane is finished, the flow is recovered, the cleaning water supply pipeline 15 and the cleaning water supply pipeline 14 are removed, the valves are normally opened, and the second valve 19 of the circulating water supply main pipeline 1 in the attached device area and the third valve 20 of the circulating water return main pipeline 11 in the adsorption device area are properly opened according to the pressure of the circulating water supply pipeline and the circulating water return pipeline.
Step 2: the pressure of the circulating water pipe network is adjusted to ensure stable production.
And step 3: once the circulating water is normally used, the circulating water cannot be closed privately, so that the pipelines are prevented from being frozen and the equipment is prevented from being frozen.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. Waste heat circulating water washs pre-filming system, its characterized in that: the system comprises an adsorption device area circulating water supply main pipeline, a first circulating water supply branch pipeline, a second circulating water supply branch pipeline, a third circulating water supply branch pipeline, a generator lubricating machine cooler, a vacuum pump plate cooler, a generator cooler, a first circulating water return branch pipeline, a second circulating water return branch pipeline, a third circulating water return branch pipeline, an adsorption device area circulating water return main pipeline, a temporary water tank, a pump, a cleaning water supply pipeline and a cleaning water return pipeline; the main circulating water supply pipeline of the adsorption device area is connected to a generator lubricating machine cooler through a first circulating water supply branch pipeline, and the generator lubricating machine cooler is connected to the main circulating water return pipeline of the adsorption device area through a first circulating water return branch pipeline; the main circulating water supply pipeline of the adsorption device area is connected to the vacuum pump plate cooler through a second circulating water supply branch pipeline, and the vacuum pump plate cooler is connected to the main circulating water return pipeline of the adsorption device area through a second circulating water return branch pipeline; the main circulating water supply pipeline of the adsorption device area is connected to a generator cooler through a third circulating water supply branch pipeline, and the generator cooler is connected to the main circulating water return pipeline of the adsorption device area through a third circulating water return branch pipeline; the temporary water tank is connected to the circulating water supply main pipeline of the adsorption device area through a cleaning water supply pipeline, a pump is arranged on the cleaning water supply pipeline, and the cleaning water return pipeline is led to the temporary water tank through the circulating water return main pipeline of the adsorption device area.
2. The waste heat circulating water cleaning pre-filming system of claim 1, wherein: and a circulating water pump outlet valve is arranged on the cleaning water supply pipeline, and a circulating water return valve is arranged on the cleaning water return pipeline.
3. The waste heat circulating water cleaning pre-filming system of claim 1, wherein: the adsorption device district circulating water supply main pipeline is last to set gradually first valve, first guide drenches valve, second valve, it connects in second valve low reaches to wash the water supply line, adsorption device district circulating water return water is last to set gradually third valve, third guide drenches valve, fourth valve on the main pipeline, it connects in the third valve upper reaches to wash the return water pipeline.
4. The waste heat circulating water cleaning pre-filming system of claim 3, wherein: the first valve and the third valve are butt-clamping butterfly valves; the second valve and the fourth valve are gate valves.
5. The waste heat circulating water cleaning pre-filming system of claim 1, wherein: and a fifth valve and a sixth valve are respectively arranged on the first circulating water supply branch pipeline and the first circulating water return branch pipeline, and the front part of the fifth valve is connected with the rear part of the sixth valve through a temporary pipeline.
6. The waste heat circulating water cleaning pre-filming system of claim 1, wherein: and a seventh valve and an eighth valve are respectively arranged on the second circulating water supply branch pipeline and the second circulating water return branch pipeline.
7. The waste heat circulating water cleaning pre-filming system of claim 1, wherein: and a ninth valve bank is arranged on the third circulating water supply branch pipeline, and a tenth valve is arranged on the third circulating water return branch pipeline.
8. The waste heat circulating water cleaning pre-filming system of claim 7, wherein: the ninth valve group comprises a ninth valve, a Y-shaped filter and a fourteenth valve which are arranged in sequence; a front pressure gauge is arranged between the ninth valve and the Y-shaped filter, a rear pressure gauge is arranged between the Y-shaped filter and the fourteenth valve, a cross line is arranged between the upstream of the ninth valve and the downstream of the fourteenth valve, and an eleventh valve is arranged on the cross line.
9. The waste heat circulating water cleaning and pre-filming method is characterized by comprising the following steps: comprises the following water washing steps:
step 1: confirming that a first pilot valve and a second pilot valve of a main circulating water supply line of an adsorption device area are closed, and confirming that a third pilot valve and a fourth pilot valve of a main circulating water return line of the adsorption device area are closed; disconnecting a second valve of a main water supply pipeline of circulating water in the adsorption device area; disconnecting a third valve of the circulating water return main pipeline of the adsorption device area;
step 2: opening a second valve of the main circulating water supply pipeline of the adsorption device area, flushing the main circulating water supply pipeline of the adsorption device area with circulating water from the source of the main circulating water supply pipeline of the adsorption device area by using water, and controlling the pressure of a circulating water pipe network;
opening a third valve of the main circulating water return line of the adsorption device area, and under the action of the pressure of a circulating water pipe network of the adsorption device area, washing the main circulating water return line of the adsorption device area with water through circulating water at the source of the main circulating water return line of the adsorption device area, so as to control the pressure of the circulating water pipe network;
and step 3: the pressure of a circulating water pipe network in an adsorption device area is ensured to be 0.5-0.7Mpa by adjusting the opening degrees of the second valve and the third valve, and the circulating water pipe network is flushed by water in a matching device;
and 4, step 4: sampling by using a glass bottle, and visually observing the water cleanness without obvious impurities;
and 5: temporarily connecting the second valve open position and the third valve open position;
the water washing steps of the circulating water branch pipe are as follows:
step 1: the circulating water supply and return valves of the lubricating oil cooler of the generator set are disconnected; disconnecting a front flange of an inlet filter of a vacuum pump plate cooler and a rear flange of a water return valve; disconnecting a water supply valve and a water return valve of a generator cooler;
step 2: punching in sequence: firstly, washing the circulating water of the lubricating oil cooler of the hair washing motor set to supply the circulating water to a water return pipeline; flushing a circulating water supply and return pipeline of the vacuum pump plate cooler; washing a circulating water supply and return pipeline of a generator cooler;
and step 3: before flushing, the second valve and the third valve are opened, and during flushing, the large branch valves are opened slowly respectively;
and 4, step 4: the pressure of the circulating water pipe network in the adsorption device area is ensured to be 0.5-0.7Mpa by adjusting the opening degrees of the second valve and the third valve;
and 5: the sample was taken after passing through the battery limit valve with a glass bottle.
10. The waste heat circulating water cleaning and pre-filming method of claim 9, wherein: the method comprises the steps of pipeline recovery preparation and dosing cleaning:
the pipeline restoration preparing step includes:
step 1: removing a second valve of a main water supply pipeline of circulating water in the adsorption device area, and connecting a temporary water tank at the position of the second valve with a pump;
step 2: supplying the circulating water of the generator cooler to a water return valve and a flange for recovery;
and step 3: the circulating water supply and return valve of the vacuum pump plate cooler recovers;
and 4, step 4: connecting a circulating water supply pipeline and a circulating water pipeline of a generator lubricating oil cooler with a temporary pipeline directly to isolate a white steel pipe bundle of the cooler;
the dosing cleaning procedure comprises:
step 1: the circulating water cleaning agent is adjusted and prepared, and the medicine chest and the pump are ready;
step 2: connecting the cleaning water return pipeline with a third valve;
and step 3: opening a circulating water inlet and outlet of each branch heat exchanger, and keeping the outlet pressure of a stable pump at 0.45-0.55 Mpa;
and 4, step 4: cleaning;
and 5: analyzing once within several hours until the iron content and the turbidity are stable and do not rise any more;
step 6: and after the cleaning is finished, draining the pipeline water, adding water again, and preparing to perform membrane formation.
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