CN108534591B - Wind disturbance descaling system and method for heat exchanger - Google Patents
Wind disturbance descaling system and method for heat exchanger Download PDFInfo
- Publication number
- CN108534591B CN108534591B CN201810580961.2A CN201810580961A CN108534591B CN 108534591 B CN108534591 B CN 108534591B CN 201810580961 A CN201810580961 A CN 201810580961A CN 108534591 B CN108534591 B CN 108534591B
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- Prior art keywords
- control valve
- heat exchanger
- pipe
- air outlet
- tank
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- 238000000034 method Methods 0.000 title claims description 17
- 238000007664 blowing Methods 0.000 claims abstract description 38
- 238000011010 flushing procedure Methods 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 238000009991 scouring Methods 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- 235000011089 carbon dioxide Nutrition 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
- F28G1/163—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from internal surfaces of heat exchange conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/003—Control arrangements
Abstract
The wind disturbance descaling system of a heat exchanger, the system includes buffer tank and scouring tank, there are air outlets and air inlets with air inlet pipe externally on the buffer tank, there are fifth control valves on the air inlet pipe, there are first air outlet pipe and second air outlet pipe communicated with buffer tank in the place of air outlet, there are first control valves on the first air outlet pipe, there are fourth control valves on the second air outlet pipe; the flushing tank is provided with a charging port which is convenient for adding blowing medium into the flushing tank, the charging port is controlled to be opened and closed by a sixth control valve, the bottom of the flushing tank is communicated with a discharging pipe, the discharging pipe is communicated with a first air outlet pipe and then is communicated with the tube side or the shell side of the heat exchanger by a blowing pipe, a third control valve is arranged on the discharging pipe, and a second control valve is arranged on the blowing pipe. The descaling system is simple in structure and convenient to operate, and can effectively wash and remove scale on the tube side or the shell side of the heat exchanger through the cooperation of wind blowing disturbance and blowing medium, so that the heat exchange effect of the heat exchanger is ensured.
Description
Technical Field
The application relates to a descaling device of a heat exchanger, in particular to a wind disturbance descaling system of the heat exchanger, and also relates to a descaling method of the wind disturbance descaling system.
Background
The heat exchanger is an energy-saving device for realizing heat transfer between two or more fluids with different temperatures, and is one of main devices for transferring heat from a fluid with a higher temperature to a fluid with a lower temperature, so that the temperature of the fluid reaches the index specified by a flow, thereby meeting the requirements of process conditions and improving the utilization rate of energy.
However, as the heat exchanger has fluid, gas and other substances flowing, the tube side or the shell side must be scaled along with the longer operation period, so that the heat transfer efficiency is reduced, and the pressure difference between the inlet and the outlet is increased.
Disclosure of Invention
The application aims to solve the technical problem of providing a wind disturbance descaling system of a heat exchanger, which has reasonable design and convenient operation and can effectively scale the heat exchanger.
The application aims to solve the other technical problem of providing a descaling method of the wind disturbance descaling system of the heat exchanger.
The technical problems to be solved by the application are realized by the following technical proposal. The application relates to an air disturbance descaling system of a heat exchanger, which comprises a buffer tank and a scouring tank, wherein an air outlet and an air inlet externally connected with an air inlet pipe are arranged on the buffer tank, a fifth control valve is arranged on the air inlet pipe, a first air outlet pipe and a second air outlet pipe which are communicated with the buffer tank are communicated at the air outlet, a first control valve is arranged on the first air outlet pipe, and a fourth control valve is arranged on the second air outlet pipe; the flushing tank is provided with a charging port which is convenient for adding blowing medium into the flushing tank, the charging port is controlled to be opened and closed by a sixth control valve, the bottom of the flushing tank is communicated with a discharging pipe, the discharging pipe is communicated with a first air outlet pipe and then is communicated with the tube side or the shell side of the heat exchanger by a blowing pipe, a third control valve is arranged on the discharging pipe, and a second control valve is arranged on the blowing pipe.
The technical problem to be solved by the application can be further solved by the following technical scheme, and for the wind disturbance descaling system of the heat exchanger, the blowing medium is dry ice or ammonium sulfate.
The technical problem to be solved by the application can be further solved by the following technical scheme, and for the wind disturbance descaling system of the heat exchanger, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the sixth control valve are all electric control valves.
The technical problem to be solved by the application can be further solved by the following technical scheme, and the wind disturbance descaling system of the heat exchanger is further provided with an electronic flowmeter for monitoring the blowing medium on the discharging pipe.
The technical problem to be solved by the application can be further solved by the following technical scheme, and for the wind disturbance descaling system of the heat exchanger, the buffer tank and the flushing tank are both provided with the pressure gauge and the safety valve.
The technical problem to be solved by the application can be further solved by the following technical scheme, namely, the wind disturbance descaling method for the heat exchanger, which uses the wind disturbance descaling system for the heat exchanger to scale the heat exchanger, comprises the following steps:
(1) Opening a pressure release valve on the flushing tank to release the pressure to 0.1MPa;
(2) Opening a sixth control valve, adding a certain amount of blowing medium into the flushing tank, and then closing the sixth control valve;
(3) Opening a fifth control valve, ventilating the buffer tank, and raising the pressure in the buffer tank to a set value;
(4) Opening a fourth control valve, ventilating the flushing tank, and raising the pressure in the flushing tank to a set value;
(5) Sequentially opening a second control valve and a first control valve, then opening a third control valve after a certain time, and descaling and blowing the tube side or the shell side of the heat exchanger;
(6) And after a certain time, sequentially closing the third control valve, the first control valve, the second control valve, the first control valve and the fifth control valve, and ending descaling.
The technical problem to be solved by the application can be further solved by the following technical scheme, and the pressure set value of the buffer tank in the step (3) is 0.4-0.8MPa for the wind disturbance descaling method of the heat exchanger.
The technical problem to be solved by the application can be further solved by the following technical scheme, and the pressure set value of the flushing tank in the step (4) is 0.4-0.8MPa for the wind disturbance descaling method of the heat exchanger.
The technical problem to be solved by the application can be further solved by the following technical scheme, and for the wind disturbance descaling method of the heat exchanger, in the step (5), the second control valve and the first control valve are opened for 10 seconds, and then the third control valve is opened.
Compared with the prior art, the application quantitatively adds the blowing medium into the flushing tank, then utilizes the first control valve and the third control valve to convey the blowing medium into the tube side or the shell side of the heat exchanger by utilizing the conveying air, and the blowing medium is uniformly sprayed to the tube side or the shell side of the heat exchanger under the pressure of the conveying air, so that the inner surface of the tube side or the course of the heat exchanger is flushed by the blowing medium, and the descaling effect is achieved. The descaling system is simple in structure and convenient to operate, and can effectively wash and remove scale on the tube side or the shell side of the heat exchanger through the cooperation of wind blowing disturbance and blowing medium, so that the heat exchange effect of the heat exchanger is ensured.
Drawings
Fig. 1 is a schematic structural view of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, a wind disturbance descaling system of a heat exchanger 12 comprises a buffer tank 1 and a scouring tank 2, wherein an air outlet and an air inlet externally connected with an air inlet pipe 3 are arranged on the buffer tank 1, a fifth control valve 4 is arranged on the air inlet pipe 3, a first air outlet pipe 5 and a second air outlet pipe 7 communicated with the buffer tank 1 are communicated at the air outlet, a first control valve 6 is arranged on the first air outlet pipe 5, and a fourth control valve 8 is arranged on the second air outlet pipe 7; the flushing tank 2 is provided with a charging port which is convenient for adding blowing medium into the flushing tank 2, the charging port is controlled to be opened and closed by a sixth control valve 9, the bottom of the flushing tank 2 is communicated with a discharging pipe, the discharging pipe is communicated with a first air outlet pipe 5 and then is communicated with a tube side or a shell side of a heat exchanger 12 by a blowing pipe, a third control valve 10 is arranged on the discharging pipe, and a second control valve 11 is arranged on the blowing pipe. The flushing tank 2 is used for containing the blowing medium; the buffer tank 1 is used for buffering and stabilizing pressure; the first control valve 6, the second control valve 11, the third control valve 10, the fourth control valve 8 and the fifth control valve 4 are used for mutually matching and firstly ventilating to perform air flushing and pressure rising on the buffer tank 1 and the flushing tank 2; then, the heat exchanger 12 is blown, then the heat exchanger 12 is conveyed with blowing medium, and scaling in the heat exchanger 12 is washed.
The pressure fluctuation range of the buffer tank 1 is 0.1-1MPa.
The pressure fluctuation range of the flushing tank 2 is 0.1-1MPa.
The blowing medium is dry ice or ammonium sulfate, has certain acidity, can wash scale on the heat exchanger 12 under the action of wind blowing, and can not damage the heat exchanger 12.
The first control valve 6, the second control valve 11, the third control valve 10, the fourth control valve 8, the fifth control valve 4 and the sixth control valve are all electric control valves.
And an electronic flowmeter for monitoring the blowing medium is also arranged on the discharging pipe.
The buffer tank 1 and the flushing tank 2 are provided with pressure gauges and safety valves. The pressure gauge is convenient for monitoring the pressure in the buffer tank 1 and the flushing tank 2 in real time; the safety valve is used for guaranteeing safety and preventing the pressure from being too large.
The wind disturbance descaling method for the heat exchanger uses the wind disturbance descaling system for the heat exchanger to scale the heat exchanger, and comprises the following steps of:
(1) Opening a pressure release valve on the flushing tank to release the pressure to 0.1MPa;
(2) Opening a sixth control valve, adding a certain amount of blowing medium into the flushing tank, and then closing the sixth control valve;
(3) Opening a fifth control valve, ventilating the buffer tank, and raising the pressure in the buffer tank to a set value;
(4) Opening a fourth control valve, ventilating the flushing tank, and raising the pressure in the flushing tank to a set value;
(5) Sequentially opening a second control valve and a first control valve, then opening a third control valve after a certain time, and descaling and blowing the tube side or the shell side of the heat exchanger;
(6) And after a certain time, sequentially closing the third control valve, the first control valve, the second control valve, the first control valve and the fifth control valve, and ending descaling.
In the step (3), the pressure set value of the buffer tank is 0.4-0.8MPa.
In the step (4), the pressure of the flushing tank is set to be 0.4-0.8MPa.
In step (5), 10 seconds after the second control valve and the first control valve are opened, and then the third control valve is opened.
Compared with the prior art, the application has the advantages and technical effects that:
1. the application can purge the heat exchanger on line, achieve the descaling effect, prolong the running period of the equipment and save the maintenance cost of parking;
2. the amount of the blowing medium is timely adjusted according to the scaling condition of the heat exchanger, and the pressure of the air delivery and supply ensures the blowing and descaling effects;
3. a DCS sequential control flow can be adopted to effectively control the blowing process, so that the operation of personnel is reduced, and the production stability is ensured;
4. the design of the equipment strictly implements the design rule of the pressure vessel, and a safety valve is arranged according to the rule to prevent the damage caused by overpressure.
Claims (4)
1. A wind disturbance descaling method for a heat exchanger is characterized by comprising the following steps of: the heat exchanger is descaled by using a heat exchanger wind disturbance descaling system, the system comprises a buffer tank and a scouring tank, an air outlet and an air inlet externally connected with an air inlet pipe are arranged on the buffer tank, a fifth control valve is arranged on the air inlet pipe, a first air outlet pipe and a second air outlet pipe which are communicated with the buffer tank are communicated at the air outlet, a first control valve is arranged on the first air outlet pipe, and a fourth control valve is arranged on the second air outlet pipe; the flushing tank is provided with a charging port which is convenient for adding a blowing medium into the flushing tank, the charging port is controlled to be opened and closed by a sixth control valve, the bottom of the flushing tank is communicated with a discharging pipe, the discharging pipe is communicated with a first air outlet pipe and then is communicated with a tube side or a shell side of the heat exchanger by a blowing pipe, the discharging pipe is provided with a third control valve, and the blowing pipe is provided with a second control valve; the discharging pipe is also provided with an electronic flowmeter for monitoring the blowing medium;
the descaling method comprises the following steps:
opening a pressure release valve on the flushing tank to release the pressure to 0.1MPa; (2) Opening a sixth control valve, adding a certain amount of blowing medium into the flushing tank, and then closing the sixth control valve; (3) Opening a fifth control valve, ventilating the buffer tank, and increasing the pressure in the buffer tank to a set value of 0.4-0.8MPa; (4) Opening a fourth control valve, ventilating the flushing tank, and increasing the pressure in the flushing tank to a set value of 0.4-0.8MPa; (5) Sequentially opening a second control valve and a first control valve, and opening a third control valve after 10 seconds to remove scale and blow air on the tube side or the shell side of the heat exchanger; (6) After a certain time, sequentially closing the third control valve, the first control valve, the second control valve, the fourth control valve and the fifth control valve to finish descaling;
and a DCS sequential control flow is adopted to control the blowing process.
2. The method for descaling a heat exchanger by wind disturbance according to claim 1, wherein: the blowing medium is dry ice or ammonium sulfate.
3. The method for descaling a heat exchanger by wind disturbance according to claim 1, wherein: the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve and the sixth control valve are all electric control valves.
4. The method for descaling a heat exchanger by wind disturbance according to claim 1, wherein: the buffer tank and the flushing tank are both provided with a pressure gauge and a safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810580961.2A CN108534591B (en) | 2018-06-07 | 2018-06-07 | Wind disturbance descaling system and method for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810580961.2A CN108534591B (en) | 2018-06-07 | 2018-06-07 | Wind disturbance descaling system and method for heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108534591A CN108534591A (en) | 2018-09-14 |
| CN108534591B true CN108534591B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810580961.2A Active CN108534591B (en) | 2018-06-07 | 2018-06-07 | Wind disturbance descaling system and method for heat exchanger |
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| Country | Link |
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| CN (1) | CN108534591B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112432545A (en) * | 2020-07-24 | 2021-03-02 | 北方华锦化学工业股份有限公司 | Method for increasing nitrogen gas introduced to recover heat exchange capacity of crude tower condenser |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4302109A1 (en) * | 1993-01-27 | 1994-07-28 | Gutehoffnungshuette Man | Heat exchanger tube wall cleaning equipment |
| CN102374822A (en) * | 2010-08-23 | 2012-03-14 | 中国石油化工股份有限公司 | Online decoking method of cooler in ammonia oxidation reaction system |
| CN204421736U (en) * | 2014-12-30 | 2015-06-24 | 惠生（南京）清洁能源股份有限公司 | A kind of heat exchanger blowing grey scale removal structure with boiler tube |
| CN205279852U (en) * | 2016-01-06 | 2016-06-01 | 宣城市楷昂化工有限公司 | Clear stifled device of sodium metabisulfite production automation |
| CN106288934A (en) * | 2015-06-01 | 2017-01-04 | 中国石油天然气集团公司 | Heat exchanger On Line Foul Removing Technology method and device |
| CN208704528U (en) * | 2018-06-07 | 2019-04-05 | 江苏斯尔邦石化有限公司 | A kind of wind disturbance scaler system of heat exchanger |
-
2018
- 2018-06-07 CN CN201810580961.2A patent/CN108534591B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4302109A1 (en) * | 1993-01-27 | 1994-07-28 | Gutehoffnungshuette Man | Heat exchanger tube wall cleaning equipment |
| CN102374822A (en) * | 2010-08-23 | 2012-03-14 | 中国石油化工股份有限公司 | Online decoking method of cooler in ammonia oxidation reaction system |
| CN204421736U (en) * | 2014-12-30 | 2015-06-24 | 惠生（南京）清洁能源股份有限公司 | A kind of heat exchanger blowing grey scale removal structure with boiler tube |
| CN106288934A (en) * | 2015-06-01 | 2017-01-04 | 中国石油天然气集团公司 | Heat exchanger On Line Foul Removing Technology method and device |
| CN205279852U (en) * | 2016-01-06 | 2016-06-01 | 宣城市楷昂化工有限公司 | Clear stifled device of sodium metabisulfite production automation |
| CN208704528U (en) * | 2018-06-07 | 2019-04-05 | 江苏斯尔邦石化有限公司 | A kind of wind disturbance scaler system of heat exchanger |
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| CN108534591A (en) | 2018-09-14 |
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Address after: 222000 Jiangsu, Lianyungang City, Xuwei District, Lianyungang District, two Road North Applicant after: JIANGSU SAILBOAT PETROCHEMICAL Co.,Ltd. Address before: 222000 room 205, building 7, Hong Kong Petrochemical, Hong Kong Road, Xuwei New District, Lianyungang, Jiangsu Applicant before: JIANGSU SAILBOAT PETROCHEMICAL Co.,Ltd. |
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