阅读说明：本技术 一种列片式换热器及其使用方法和清洗维护方法 (Column-plate heat exchanger and using method and cleaning and maintaining method thereof ) 是由 王树众 张熠姝 宋文瀚 李建娜 杨健乔 蒋卓航 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种列片式换热器及其使用方法和清洗维护方法,属于化工能源领域,包括内直管与内垂直弯管连接,外直管和外管连通管连接组成单一列片式套管换热器,相邻两个单一列片式换热器通过内管连接管和外管连接管连接组成换热器主体,其中内、外管三通分别连接于内、外连接管中间,用于连接截止阀、排污管和清洗管等,肋片安装于内直管两侧用于支撑,波纹管膨胀节安装于外直管中间用于吸收管道热膨胀。该列片式换热器结构设计合理,能够有效解决传统套管式换热器易结垢、易堵塞且不易于拆卸清洗维护的技术难题。(The invention discloses a row-sheet type heat exchanger, a using method and a cleaning and maintaining method thereof, belonging to the field of chemical energy. The column plate type heat exchanger is reasonable in structural design, and can effectively solve the technical problems that a traditional sleeve type heat exchanger is easy to scale and block and is not easy to disassemble, clean and maintain.)

1. A row-fin heat exchanger is characterized by comprising a plurality of row-fin heat exchanger units which are arranged in parallel, wherein each row-fin heat exchanger unit comprises two inner straight pipes (1) and two outer straight pipes (2) which are adjacent in the vertical direction, two ends of the two inner straight pipes (1) which are adjacent in the vertical direction are connected through an inner vertical bent pipe (3), two ends of the two outer straight pipes (2) which are adjacent in the vertical direction are connected through an outer pipe connecting pipe (4), and a vertical sleeve layer is formed; in two adjacent row-sheet heat exchanger units, inner straight pipes (1) are connected by an inner pipe connecting pipe (5), outer straight pipes (2) are connected by an outer pipe connecting pipe (6), an inner pipe tee joint (7) is arranged on the inner pipe connecting pipe (5), an outer pipe tee joint (8) is arranged on the outer pipe connecting pipe (6), and the inner pipe tee joint (7) and the outer pipe tee joint (8) are used for externally connecting a stop valve and an outer support pipe;

in each column plate type heat exchanger unit, an inner straight pipe (1) and an outer straight pipe (2) are coaxially sleeved, a supporting ring rib (13) is sleeved on a coaxial sleeve formed by the inner straight pipe and the outer straight pipe, and a corrugated pipe compensator (14) used for absorbing expansion deformation of the outer straight pipe (2) caused by heating is further sleeved on the outer straight pipe (2).

2. Plate heat exchanger according to claim 1, characterized in that several support ring ribs (13) are provided on the coaxial jacket of each inner (1) and outer (2) straight tube.

3. The plate heat exchanger according to claim 2, wherein the number of the support ring ribs (13) is determined by the length of the heat exchange tubes.

4. Plate and fin heat exchanger according to claim 1, characterized in that the bellow compensator (14) is arranged in the middle of the outer straight tube (2).

5. The plate heat exchanger according to any one of claims 1 to 4, further comprising a fixing support (15) and a base (16), wherein the fixing support (15) is fixedly connected to the base (16), the fixing support (15) is connected with a triangular steel (17), and the U-shaped bolt (18) is connected with the fixing support (15) through the triangular steel (17) and used for fixing the outer straight pipe (2) between the U-shaped bolt (18) and the triangular steel (17).

6. The shell and tube heat exchanger according to any one of claims 1 to 4, characterized in that a temperature meter or a pressure gauge for real-time monitoring of working conditions is installed on adjacent shell and tube heat exchanger units.

7. The use method of the plate heat exchanger of any one of claims 1 to 6, characterized in that the inner straight pipe (1) is connected with an inner pipe inlet connecting pipe (9) and an inner pipe outlet connecting pipe (10), and the outer straight pipe (2) is connected with an outer pipe inlet connecting pipe (11) and an outer pipe outlet connecting pipe (12);

hot fluid enters the heat exchange inner pipe through the inner pipe inlet connecting pipe (9) to release heat, and then flows out of the heat exchange inner pipe through the inner pipe outlet connecting pipe (10); cold fluid enters the heat exchange outer pipe through the outer pipe inlet connecting pipe (11) to absorb heat, and then flows out of the heat exchange outer pipe through the outer pipe outlet connecting pipe (12).

8. The method for cleaning and maintaining the shell and tube heat exchanger according to any one of claims 1 to 6, wherein when a certain shell and tube heat exchanger unit is found to be out of order and needs maintenance, the inner tube connecting tube (5) and the outer tube connecting tube (6) are cut off, and the shell and tube heat exchanger unit with the failure is removed for maintenance.

9. The method for cleaning and maintaining the plate heat exchanger according to claim 8, wherein when the plate heat exchanger is blocked, the stop valves on the bottom inner tube tee (7) and the bottom outer tube tee (8) are opened to perform pressure relief treatment, so that the heat exchange fluid flows out of the plate heat exchanger through the bottom inner tube tee (7) and the bottom outer tube tee (8).

10. The method for cleaning and maintaining the shell and tube heat exchanger according to claim 8, wherein when the shell and tube heat exchanger needs cleaning, the stop valves on the top inner tube tee (7) and the top outer tube tee (8) are opened to allow cleaning water to flow in, the stop valves on the bottom inner tube tee (7) and the bottom outer tube tee (8) are opened to allow the cleaning water to flow out, the forward cleaning operation is completed, then switching is performed, the stop valves on the bottom inner tube tee (7) and the bottom outer tube tee (8) are opened to allow the cleaning water to flow in, and the stop valves on the top inner tube tee (7) and the top outer tube tee (8) are opened to allow the cleaning water to flow out, so that the reverse cleaning operation is completed.

Technical Field

The invention belongs to the field of chemical energy, and relates to a plate-type heat exchanger, a use method thereof and a cleaning and maintaining method thereof.

Background

In the industries of energy, chemical engineering, environmental protection and the like, a heat exchanger is one of important devices, the material components in a plurality of production processes are complex and diverse, for example, sewage, waste materials and the like in sewage treatment contain a large amount of organic matters, inorganic salts, solid particles and the like, and the scaling is easy to form on the heated wall surface of the heat exchanger, so that the heat exchanger is blocked, and the operation efficiency and safety of the device are influenced. As main equipment in the fields of chemical industry and environmental protection production, the operation efficiency of a heat exchanger directly influences the operation of a system, even influences the stability and the production efficiency of the system, the property of heat exchange fluid and the structure of the heat exchanger are main factors causing equipment blockage, and how to solve the problem of blockage of the heat exchanger or reduce the shutdown and maintenance frequency of the heat exchanger due to blockage is an important problem in the chemical industry and the environmental protection industry at present.

Because the production system in the chemical and environmental protection fields is often under the high-temperature and high-pressure conditions, the cold/heat exchange fluid with high temperature and high pressure on both sides is mainly considered, the pressure resistance requirement on containers and pipelines is higher, and the requirement on the heat exchange efficiency is also higher, so that a sleeve type heat exchanger is preferably selected to carry out heat exchange on common materials in the chemical and environmental protection fields. However, common materials always contain a large amount of components which are easy to scale and deposit, such as organic matters, inorganic salts, solid particles and the like, so that the heat exchanger pipeline is silted and blocked, and particularly in areas with reduced flow rates, such as an inner pipe elbow and an outer pipe communicating pipe. The traditional double-pipe heat exchanger mainly uses a horizontal bent pipe, is always integrated, is not beneficial to cleaning and pollution discharge at the bent pipe, is not thorough in operation and poor in effect, and is also not beneficial to detachment and maintenance of a local area.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a row plate type heat exchanger, a using method and a cleaning and maintaining method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

the invention discloses a row-fin heat exchanger which comprises a plurality of row-fin heat exchanger units arranged in parallel, wherein each row-fin heat exchanger unit comprises two inner straight pipes and two outer straight pipes which are adjacent in the vertical direction, two ends of the two inner straight pipes which are adjacent in the vertical direction are connected through an inner vertical bent pipe, and two ends of the two outer straight pipes which are adjacent in the vertical direction are connected through an outer pipe connecting pipe to form a vertical sleeve layer; in two adjacent row-fin heat exchanger units, the inner straight pipes are connected by an inner pipe connecting pipe, the outer straight pipes are connected by an outer pipe connecting pipe, an inner pipe tee joint is arranged on the inner pipe connecting pipe, an outer pipe tee joint is arranged on the outer pipe connecting pipe, and the inner pipe tee joint and the outer pipe tee joint are used for externally connecting a stop valve and an outer support pipe;

in each column plate type heat exchanger unit, an inner straight pipe and an outer straight pipe are coaxially sleeved, a supporting ring rib is sleeved on a coaxial sleeve formed by the inner straight pipe and the outer straight pipe, and a corrugated pipe compensator used for absorbing expansion deformation of the outer straight pipe when the outer straight pipe is heated is further sleeved on the outer straight pipe.

Preferably, a plurality of supporting annular ribs are arranged on a coaxial sleeve formed by each inner straight pipe and each outer straight pipe, the number of the supporting annular ribs is determined by the length of the heat exchange pipe and stress calculation, and the supporting position is designed by the stress calculation.

Further preferably, two support ring ribs are provided, located at 1/3 and 2/3 of the coax casing tube side, respectively.

Preferably, the bellow compensator is arranged in the middle of the outer straight tube.

Preferably, the fixing device further comprises a fixing support and a base, the fixing support is fixedly connected to the base, triangular steel is connected to the fixing support, and the U-shaped bolt is connected with the fixing support through the triangular steel and used for fixing the outer straight pipe between the U-shaped bolt and the triangular steel.

Preferably, a temperature meter or a pressure gauge for monitoring the working condition in real time is installed on the adjacent row plate type heat exchanger units.

The invention also discloses a using method of the plate-type heat exchanger, wherein the inner straight pipe is connected with an inner pipe inlet connecting pipe and an inner pipe outlet connecting pipe, and the outer straight pipe is connected with an outer pipe inlet connecting pipe and an outer pipe outlet connecting pipe;

hot fluid enters the heat exchange inner pipe through the inner pipe inlet connecting pipe to release heat, and then flows out of the heat exchange inner pipe through the inner pipe outlet connecting pipe; and cold fluid enters the heat exchange outer pipe through the outer pipe inlet connecting pipe to absorb heat, and then flows out of the heat exchange outer pipe through the outer pipe outlet connecting pipe.

The invention also discloses a cleaning and maintaining method of the column plate type heat exchanger, when a certain column plate type heat exchanger unit is found to be in fault and needs maintenance, the inner pipe connecting pipe and the outer pipe connecting pipe are cut off, and the column plate type heat exchanger unit in fault is removed for maintenance.

Preferably, when the plate type heat exchanger is blocked, the stop valves on the inner pipe tee joint at the bottom and the outer pipe tee joint at the bottom are opened to carry out pressure relief treatment, so that the heat exchange fluid flows out of the plate type heat exchanger through the inner pipe tee joint at the bottom and the outer pipe tee joint at the bottom.

Preferably, when the plate heat exchanger needs to be cleaned, the stop valves on the inner pipe tee joint at the top and the outer pipe tee joint at the top are opened to introduce cleaning water, the stop valves on the inner pipe tee joint at the bottom and the outer pipe tee joint at the bottom are opened to enable the cleaning water to flow out, the forward cleaning operation is completed, then switching is performed, the stop valves on the inner pipe tee joint at the bottom and the outer pipe tee joint at the bottom are opened to introduce the cleaning water, the stop valves on the inner pipe tee joint at the top and the outer pipe tee joint (8) at the top are opened to.

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

according to the column plate type heat exchanger disclosed by the invention, the heat exchange pipeline is designed into the vertically coiled single column plate type heat exchanger connected by the vertical bent pipe, and compared with a horizontal sleeve pipe layer coiled in the horizontal direction, the vertical column plate structure is completely connected by the vertical bent pipe, so that the heat exchange fluid can be completely discharged from a sewage outlet at the bottom. Then, two adjacent single-row plate heat exchanger units are connected and combined into a heat exchanger whole through an inner connecting pipe and an outer connecting pipe, and the heat exchanger formed by connecting a plurality of small-sized row plate heat exchanger units is easy to monitor the temperature of each single-row plate heat exchanger in real time, so that the heat exchange efficiency, the process temperature and other functional parameters of the heat exchanger can be evaluated, the pressure change is monitored to judge the blocking degree of a heat exchanger pipeline, and signals are provided for operations such as shutdown, cleaning and maintenance. The specific structural design advantages are as follows: firstly, a tee pipe fitting is arranged at the joint of each single-row plate heat exchanger unit and can be used for connecting a stop valve, an external branch pipe and the like. The structure can be used for heat exchange of dirty fluid or fluid which is easy to scale and block, and compared with the traditional horizontal coiled heat exchanger, the structure can realize more thorough pollution discharge and cleaning operation and stronger maintainability; secondly, the supporting ring ribs are arranged at the two ends of the sleeve pipes of the inner and outer straight pipes, so that the inner straight pipe is supported, the flexible deformation of the pipeline caused by long length is avoided, and the possibility of silting and blocking of fluid containing solids, easy blocking and the like caused by the fact that the fluid is attached to the bent pipe due to the thermal expansion of the heat exchange pipeline is also avoided; finally, the corrugated pipe compensator is arranged in the middle of the outer straight pipe to absorb the thermal expansion of the sleeve, so that the pipeline deformation caused by heating is avoided.

Further, adopt tee bend pipe fitting and connecting pipe to be connected a plurality of bottoms of arranging the piece heat exchanger, accessible tee bend pipe fitting is in the same place with stop valve, sewage pipe, accessible tee bend, stop valve and sewage pipe carry out urgent pressure release operation to single heat exchanger when the accident such as jam appears, and the pressure release feedback of this structure is fast, the pressure release is thorough, efficient.

Further, adopt tee bend pipe fitting and connecting pipe to be connected a plurality of top of row's piece heat exchanger, accessible tee bend pipe fitting is in the same place with stop valve, washing pipe, and this scavenge pipe of accessible and stop valve carry out positive and negative washing to every single row of piece heat exchanger, then discharge through stop valve and blow off pipe, and positive and negative washing can be realized to this structure, and washs that the feedback is fast, the washing is thorough, efficient.

The invention discloses a cleaning maintenance operation method of the plate heat exchanger, which comprises the steps that a temperature instrument and a pressure instrument monitoring point can be arranged at the joint of each single plate heat exchanger to monitor and evaluate the working capacity, efficiency and blocking condition of the heat exchanger, and meanwhile, the method is beneficial to finding out equipment accident points and can carry out targeted optimization, maintenance and the like on the heat exchanger; if a certain row of plate heat exchangers has problems and needs to be maintained, the inner pipe connecting pipe and the outer pipe connecting pipe can be cut off, and the single row of plate heat exchangers can be dismantled and maintained; when the heat exchanger is blocked to a certain degree, opening a bottom stop valve to perform pressure relief operation, so that the heat exchange fluid flows out of the heat exchanger through a bottom inner tube tee joint and a bottom outer tube tee joint; when the heat exchanger needs to be cleaned, the top stop valve is opened to introduce cleaning water, the bottom stop valve is opened to enable the cleaning water to flow out, the forward cleaning operation is completed, the bottom stop valve is opened to introduce the cleaning water, the top stop valve is opened to enable the hydrophilic water to flow out, and the backward cleaning operation is completed. The method effectively solves the problem that the double-pipe heat exchanger is difficult to clean and maintain, can realize the thorough pressure relief and the on-line positive and negative flushing of the heat exchanger, can make the disassembly and the maintenance of the heat exchanger easier, and can monitor the temperature and the pressure parameters of each heat exchanger in real time to prevent the heat exchanger from serious safety accidents or damages and the like, thereby ensuring the long-term, stable and safe operation of the heat exchanger.

Drawings

FIG. 1 is a front view of a plate-type heat exchanger according to the present invention;

FIG. 2 is a left side view of the plate and column heat exchanger configuration shown in FIG. 1;

FIG. 3 is a top view of the plate and column heat exchanger configuration shown in FIG. 1;

fig. 4 is a schematic view of the annular rib structure.

Wherein: 1 is an inner straight pipe; 2 is an outer straight pipe; 3 is an inner vertical bent pipe; 4 is an outer pipe connecting pipe; 5 is an inner pipe connecting pipe; 6 is an outer pipe connecting pipe; 7 is an inner pipe tee joint; 8 is an outer pipe tee joint; 9 is an inner pipe inlet connecting pipe; 10 is an inner pipe outlet connecting pipe; 11 is an outer pipe inlet connecting pipe; 12 is an outer pipe outlet connecting pipe; 13 is a supporting ring rib; 14 is a corrugated pipe compensator; 15 is a fixed bracket; 16 is a base; 17 is triangular steel; 18 are U-bolts.

Detailed Description

In order to make the technical solutions of the present invention better understood, 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.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is described in further detail below with reference to the accompanying drawings:

the invention relates to a plate-type heat exchanger, which comprises heat exchange pipelines such as an inner straight pipe 1, an outer straight pipe 2, an inner vertical bent pipe 3, an outer pipe connecting pipe 4, an inner pipe connecting pipe 5, an outer pipe connecting pipe 6 and the like; pipe fitting structures such as an inner pipe tee joint 7, an outer pipe tee joint 8, an inner pipe inlet connecting pipe 9, an inner pipe inlet connecting pipe 10, an outer pipe inlet connecting pipe 11, an outer pipe outlet connecting pipe 12, a support ring rib 13, a corrugated pipe compensator 14 and the like; the fixing support 15, the base 16, the triangular steel 17, the U-shaped bolt 18 and other supporting structures.

The inner straight pipes 1 and the outer straight pipes 2 are coaxial sleeves, two ends of two inner straight pipes 1 adjacent in the vertical direction are connected with the inner vertical bent pipe 3, two ends of two outer straight pipes 2 adjacent in the vertical direction are connected with the outer pipe connecting pipe 4, and a vertical sleeve layer is formed, namely the single-row plate type heat exchanger; in two adjacent single row plate heat exchangers, an inner straight pipe 1 is connected by an inner pipe connecting pipe 5, and an outer straight pipe 2 is connected by an outer pipe connecting pipe 6 to form an integral row plate heat exchanger; the inner pipe tee joint 7 is connected to the middle of the inner pipe connecting pipe 5, the outer pipe tee joint 8 is connected to the middle of the outer pipe connecting pipe 6 and can be connected with a stop valve and an outer supporting pipe to perform pressure relief and pollution discharge or cleaning operation; hot fluid enters the heat exchange inner tube for heat release through the connection of the inner tube inlet connecting tube 9 and the inner straight tube 1, and then flows out of the heat exchange inner tube through the connection of the inner tube outlet connecting tube 10 and the inner straight tube 1; cold fluid is connected with the outer straight pipe 2 through an outer pipe inlet connecting pipe 11 to enter the heat exchange outer pipe for absorbing heat, and then is connected with the outer straight pipe 2 through an outer pipe outlet connecting pipe 12 to flow out of the heat exchange outer pipe; the supporting ring rib 13 is positioned between coaxial sleeves formed by the inner straight pipe 1 and the outer straight pipe 2 and connected with the outer wall surface of the inner straight pipe 1 at the position 1/3 and the position 2/3 of a pipe pass, which is related to the flexible deformation of a pipeline, so that the strength of the supporting ring rib 13 can support the inner straight pipe 1 and the flexible deformation is slowed down; the corrugated pipe compensator 14 is connected between the outer straight pipes 2 and can absorb the deformation of the outer straight pipes 2 at two ends caused by thermal expansion, so that the safety of the heat exchanger is ensured; the base 16 is connected with the fixed support 15 and plays a supporting role for the heat exchanger main body, the triangular steel 17 is connected with the fixed support 15, and the U-shaped bolt 18 is connected with the triangular steel 17 to fix the outer straight pipe 2 of the heat exchanger main body on the fixed support 15.

The plate type heat exchanger of the invention comprises: interior straight tube and interior perpendicular return bend are connected, and outer straight tube and outer tube communicating pipe are connected and are constituteed single one row of piece formula double-pipe heat exchanger, and two adjacent single one row piece formula heat exchangers pass through inner tube connecting pipe and outer tube connecting pipe connection and constitute the heat exchanger main part, and wherein the inside and outside pipe tee bend is connected respectively in the middle of inside and outside connecting pipe for connect stop valve, blow off pipe and scavenge pipe etc. the fin is installed and is used for supporting in interior straight tube both sides, and the bellows expansion joint is installed and is used for absorbing the pipeline thermal.

The heat exchange pipeline is designed into a single row plate heat exchanger which is vertically coiled and connected by a vertical bent pipe, then two adjacent single row plate heat exchangers are connected and combined into a heat exchanger whole by an inner connecting pipe and an outer connecting pipe, and a tee pipe fitting is arranged at the joint of each single row plate heat exchanger and can be connected with a stop valve, an outer branch pipe and the like. The structure can be used for heat exchange of dirty fluid or fluid which is easy to scale and block, and compared with the traditional horizontal coiled heat exchanger, the structure can realize more thorough pollution discharge and cleaning operation and stronger maintainability; by arranging the supporting ring ribs at the two ends of the straight pipe sleeve, the inner straight pipe is supported, the flexible deformation of the pipeline caused by long length is avoided, and the possibility of silting and blocking of fluid containing solids, easy blocking and the like caused by the fact that the fluid is attached to the bent pipe due to the fact that the heat exchange pipeline is heated and expanded is also avoided; the corrugated pipe compensator is arranged in the middle of the outer straight pipe to absorb the thermal expansion of the sleeve, so that the pipeline deformation caused by heating is avoided.

The invention relates to a cleaning and maintaining operation method of a novel row plate type heat exchanger, which comprises the steps that a temperature instrument and a pressure instrument monitoring point can be arranged at the joint of each single row plate type heat exchanger to monitor and evaluate the working capacity, efficiency and blocking condition of the heat exchanger, and meanwhile, the method is beneficial to finding out equipment accident points, and can carry out targeted optimization, maintenance and the like on the heat exchanger; if a certain row of plate heat exchangers has problems and needs to be maintained, the inner pipe connecting pipe and the outer pipe connecting pipe can be cut off, and the single row of plate heat exchangers can be dismantled and maintained; when the heat exchanger is blocked to a certain degree, opening a bottom stop valve to perform pressure relief operation, so that the heat exchange fluid flows out of the heat exchanger through a bottom inner tube tee joint and a bottom outer tube tee joint; when the heat exchanger needs to be cleaned, the top stop valve is opened to introduce cleaning water, the bottom stop valve is opened to enable the cleaning water to flow out, the forward cleaning operation is completed, the bottom stop valve is opened to introduce the cleaning water, the top stop valve is opened to enable the hydrophilic water to flow out, and the backward cleaning operation is completed.

In the embodiment, by combining the structural characteristics of the novel plate-type heat exchanger, a cleaning and maintenance operation method is provided, the problem that the double-pipe heat exchanger is difficult to clean and maintain is solved, the complete pressure relief and the online forward and backward flushing of the heat exchanger can be realized, the disassembly and maintenance of the heat exchanger can be easier, the temperature and pressure parameters of each heat exchanger can be monitored in real time to prevent the heat exchanger from serious safety accidents or damage and the like, and therefore the long-term, stable and safe operation of the heat exchanger is guaranteed.

In conclusion, the novel plate-type heat exchanger provided by the invention can improve the heat exchange functionality and safety of dirty fluid or fluid which is easy to scale and block, and meanwhile, a corresponding cleaning and maintenance operation method is provided for the structure of the device, so that the heat exchanger can be cleaned and maintained, the possibility of shutdown and damage of the heat exchanger is reduced, the heat exchanger is more stable to operate, and the safety and the economical efficiency of equipment and system operation are improved.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.