Intelligent control type on-line cleaning type heat exchange device and control method thereof

Abstract

The invention discloses an intelligent control type online cleaning heat exchange device and a control method thereof. The device comprises a heat exchange unit, an impurity-containing liquid system, a clean medium system, a flushing water system and a control system. The intelligent control type on-line cleaning type heat exchange device provided by the invention has excellent on-line cleaning and anti-scaling and anti-blocking functions; water is used as a flushing medium, and a specially-designed cleaning scraper structure is combined, so that each heat exchange area is effectively cleaned, and the comprehensive scale removal and blockage removal effects are better; and the integrated skid-mounted design is adopted, so that production, transportation and field installation of the device are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to an intelligently controlled online clean heat exchange device and a control method thereof. Background Art

[0002] In the industrial production process, heat exchangers are one of the most commonly used process equipment. They are widely used in metallurgy, petrochemical, electric power, building materials and other industries. The design and commissioning of heat exchangers have greatly promoted the efficient operation of the production process. According to the different types of process media involved in heat exchange and the differences in production process requirements, there are many types and types of heat exchangers. The most common ones are shell and tube, plate, gas-liquid, gas-gas, fin-tube, etc. After years of engineering practice, there are also mature evaluation standards for the quality of heat exchangers. Heat exchangers used in clean medium heat exchange scenarios usually have a long service life, low failure rate, and high operating efficiency; on the contrary, when used in heat exchange scenarios with impure media, the failure rate of heat exchangers is relatively high, the service life is short, and the heat exchange efficiency is low. The most common problems include scaling and blockage of heat exchange passages, scaling, wear and leakage of heat exchange elements, and corrosion and leakage of heat exchange elements. For corrosion and leakage problems, it is usually solved by improving the material anti-corrosion level of the heat exchange element. Regarding scaling, blockage and wear problems, there are some corresponding measures for certain process scenarios. For example, heat exchangers used in coal-fired boilers are usually equipped with steam soot blowing or compressed air soot blowing to prevent scaling caused by dust accumulation in the flue gas on the surface of the heat exchange element; for heat exchange scenarios of liquid media containing impurities, there are currently no mature and reliable anti-blocking and anti-scaling heat exchanger products. In actual projects, many heat exchangers in such scenarios have scaling and blockage problems after a short period of operation, which leads to a large number of frequent shutdowns and maintenance work, which not only affects the continuity of process production and the heating efficiency of the system, but also reduces the economic efficiency of the project. In the field of heat exchange of liquid media containing impurities, scaling has become a core factor restricting the application of heat exchangers. Therefore, it is necessary to propose an intelligent online clean heat exchange device and its control method to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide an intelligent online clean heat exchange device and a control method thereof to solve the problem of heat exchanger scaling in a heat exchange scenario of a liquid medium containing impurities.

[0004] In a first aspect, the present invention provides an intelligent control type online clean heat exchange device, comprising: a heat exchange unit, an impurity-containing liquid system, a clean medium system, a flushing water system and a control system;

[0005] The heat exchange unit comprises a heat exchanger shell, a heat exchange tube, a cleaning scraper and a scraper support plate; the impure liquid system comprises an impure liquid inlet, an impure liquid pipeline, an impure liquid inlet manifold, an impure liquid outlet manifold, an impure liquid outlet, an impure liquid inlet valve, an impure liquid outlet valve and an impure liquid bypass valve; the impure liquid inlet is connected to one end of the impure liquid inlet manifold through the impure liquid pipeline, the other end of the impure liquid inlet manifold is connected to the area between the heat exchanger shell and the heat exchange tube, one end of the impure liquid outlet manifold is connected to the area between the heat exchanger shell and the heat exchange tube, and the impure liquid outlet manifold is connected to the area between the heat exchanger shell and the heat exchange tube. The other end is connected with the impure liquid outlet through an impure liquid pipeline, a section of connected impure liquid pipeline is provided between the impure liquid inlet and the impure liquid outlet, an impure liquid inlet valve is provided on the inlet impure liquid pipeline of the impure liquid inlet manifold, an impure liquid outlet valve is provided on the outlet impure liquid pipeline of the impure liquid outlet manifold, and an impure liquid bypass valve is provided on the impure liquid pipeline directly connected between the impure liquid inlet and the impure liquid outlet; a sewage outlet is provided at the bottom of the impure liquid outlet manifold, the sewage outlet is connected with an inlet of the sewage valve through a flushing water pipeline, and an outlet of the sewage valve is connected with a flushing water outlet through a flushing water pipeline.

[0006] The clean medium system comprises a clean medium inlet, a clean medium pipeline, a clean medium inlet header, a clean medium outlet and a clean medium outlet header; the clean medium inlet is connected to one end of the clean medium inlet header through the clean medium pipeline, the other end of the clean medium inlet header is connected to the lower end of the area inside the heat exchange tube, one end of the clean medium outlet header is connected to the upper end of the area inside the heat exchange tube, and the other end of the clean medium outlet header is connected to the clean medium outlet through the clean medium pipeline;

[0007] The flushing water system includes a flushing water inlet, a flushing water pipeline, a booster flushing pump, a flushing water outlet, a flushing water upper header, a flushing water lower header, a flushing valve 1, a flushing valve 2, a drain valve 1, a drain valve 2 and a drain valve 3; the flushing water inlet is connected to the inlet of the booster flushing pump through the flushing water pipeline, the outlet of the booster flushing pump is connected to the inlet of the flushing valve 1 and the inlet of the flushing valve 2 respectively through the flushing water pipeline, the outlet of the flushing valve 1 is connected to one end of the flushing water lower header through the flushing water pipeline, and the outlet of the flushing valve 2 is connected to the flushing water upper header through the flushing water pipeline. One end of the flushing water tank is connected, the other end of the flushing water lower header is connected to the lower end of the area between the heat exchanger shell and the heat exchange tube, the other end of the flushing water upper header is connected to the upper end of the area between the heat exchanger shell and the heat exchange tube, a sewage outlet is provided at the bottom of the flushing water upper header, the sewage outlet is connected to the three inlets of the sewage valve through the flushing water pipeline, the three outlets of the sewage valve are connected to the flushing water outlet through the flushing water pipeline, a sewage outlet is provided at the bottom of the flushing water lower header, the sewage outlet is connected to the second inlet of the sewage valve through the flushing water pipeline, and the second outlet of the sewage valve is connected to the flushing water outlet through the flushing water pipeline;

[0008] The control system comprises a control box, which is communicatively connected with various valves in the impurity-containing liquid system and the flushing water system.

[0009] Furthermore, the device also includes a matching support, which includes a chassis and a supporting structure; the heat exchanger shell, impurity-containing liquid pipeline, clean medium pipeline, flushing water pipeline, booster flushing pump and control box are all fixed on the chassis through the supporting structure, forming an integrated skid-mounted structure as a whole.

[0010] Furthermore, a scraper support plate is provided on the cleaning scraper.

[0011] Furthermore, the matching boundaries between the cleaning scraper and the inner wall of the heat exchanger shell and the heat exchange tube are provided with a gap required to ensure the installation and up and down movement of the cleaning scraper.

[0012] Furthermore, a remote liquid level gauge for indicating the liquid level between the heat exchanger shell and the heat exchange tube is provided on the heat exchanger shell.

[0013] Furthermore, a remote pressure gauge is respectively provided on the inlet manifold for the impure liquid medium and the outlet manifold for the impure liquid medium.

[0014] In a second aspect, the present invention provides a control method for the above-mentioned intelligent online clean heat exchange device, comprising:

[0015] In the normal operation mode, the impure liquid inlet valve and the impure liquid outlet valve are in the open state, and the impure liquid bypass valve is in the closed state; when the running resistance on the impure liquid side reaches the flushing threshold value or runs for a preset period, switch to the flushing mode, open the impure liquid bypass valve, close the impure liquid inlet valve and the impure liquid outlet valve, open the drain valve 1, and drain the impure liquid in the heat exchanger through the drain valve 1 and the flushing water outlet to the designated area until the liquid level shows the lowest level, then close the drain valve 1 and start the flushing operation steps;

[0016] After flushing is completed, open the inlet valve of the liquid containing impurities. When the liquid level shows the highest level, open the outlet valve of the liquid containing impurities and close the bypass valve of the liquid containing impurities to complete the switching of the normal operation mode.

[0017] Furthermore, the device comprises the following flushing operation steps:

[0018] First, turn on the booster flushing pump, flushing valve 2 and drain valve 3. The flushing water enters the heat exchanger from the bottom of the heat exchanger, pushing the cleaning scraper to move upward. The sewage is discharged from the top of the heat exchanger through the flushing water pipe and drain valve 3 through the flushing water outlet until the liquid level shows the highest level. Close flushing valve 2 and drain valve 3, and open flushing valve 1 and drain valve 2. The flushing water enters the heat exchanger from the top of the heat exchanger, pushing the cleaning scraper to move downward. The sewage is discharged from the bottom of the heat exchanger through the flushing water pipe and drain valve 2 through the flushing water outlet until the cleaning scraper reaches the bottom of the heat exchanger. Close the booster flushing pump and flushing valve 1, and open drain valve 1 at the same time. The flushing water in the heat exchanger is discharged from the flushing water outlet through the flushing water pipe and drain valve 1 until the liquid level shows the lowest level. Close drain valve 2 and drain valve 1, thereby completing the flushing process of the heat exchanger.

[0019] The present invention has the following beneficial effects: the present invention provides an intelligent online cleaning heat exchange device and a control method thereof, which have excellent online cleaning and anti-scaling and anti-blocking functions; water is used as the flushing medium, combined with a specially designed cleaning scraper structure, so that each heat exchange area can be effectively cleaned, and the comprehensive cleaning and de-blocking effects are better; an integrated skid-mounted design is adopted, which is convenient for the production, transportation and on-site installation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a front view of the intelligent control type online clean heat exchange device of the present invention;

[0022] Figure 2 This is a right view of the intelligent control type online clean heat exchange device of the present invention;

[0023] Figure 3 This is a left view of the intelligent control type online clean heat exchange device of the present invention;

[0024] Figure 4 This is an AA cross-sectional view of the intelligent control type online clean heat exchange device of the present invention;

[0025] Figure 5 It is a top view of the intelligent control type online clean heat exchange device of the present invention;

[0026] Figure 6 It is a BB cross-sectional view of the intelligent control type online clean heat exchange device of the present invention;

[0027] Figure 7is a partial view a of the intelligent control type online clean heat exchange device of the present invention;

[0028] Figure 8 This is a three-dimensional schematic diagram of the intelligent online clean heat exchange device of the present invention. Figure 1 ;

[0029] Fig. 9 This is a three-dimensional schematic diagram of the intelligent online clean heat exchange device of the present invention. Figure 2 ;

[0030] Fig.10 It is the process control diagram of switching from normal mode to flushing mode;

[0031] Fig.11 It is the flushing process control chart;

[0032] Fig.12 It is the process control diagram of switching from flushing mode to normal mode.

[0033] Illustration: 1-heat exchanger shell; 2-impurity liquid inlet manifold; 3-impurity liquid pipeline; 4-impurity liquid inlet valve; 5-impurity liquid outlet; 6-impurity liquid bypass valve; 7-flushing water inlet; 8-chassis; 9-clean medium pipeline; 10-flushing water upper manifold; 11-flushing water pipeline; 12-clean medium inlet; 13-control box; 14-impurity liquid inlet; 15-boosting flushing pump; 16-clean medium outlet; 17-flushing water outlet; 18-flushing valve one; 19-flushing valve two; 20-cleaning scraper; 21-scraper support plate; 22-drain valve one; 23-drain valve two; 24-flushing water underwater manifold; 25-impurity liquid outlet manifold; 26-heat exchange tube; 27-drain valve three; 28-support structure; 29-impurity liquid outlet valve; 30-clean medium outlet manifold; 31-clean medium inlet manifold. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those generally understood by those of ordinary skill in the art to which the present application belongs.

[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0036] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for clarity, the thickness of the layers and regions is enlarged, and the same reference numerals are used to represent the same devices, so their description will be omitted.

[0037] In order to solve the common scaling problem in the industry, the present invention proposes an intelligently controlled online clean heat exchange device. By specially designing its main structure and process system, and using a specially designed multi-porous cleaning scraper as the basic cleaning component, the pressurized water jet flushing and pressure energy driving effect are fully utilized to comprehensively realize uniform and effective cleaning of the heat exchange area, achieving the effect of anti-scaling and anti-blocking, fundamentally solving the blockage problem of the heat exchanger, effectively improving the heat exchange efficiency of the heat exchanger, and extending the operation time of the production line, thereby improving the economic benefits of the project and providing a new technical solution for the research and development of high-efficiency heat exchange equipment in this field.

[0038] See also Figures 1 to 12The embodiment of the present invention provides an intelligent control type online clean heat exchange device, which is mainly composed of a heat exchange unit, an impure liquid system, a clean medium system, a flushing water system, a control system and a supporting support, wherein the heat exchange unit mainly includes a heat exchanger shell 1, a heat exchange tube 26, a cleaning scraper 20 and a scraper support plate 21; the impure liquid system mainly includes an impure liquid inlet 14, an impure liquid pipeline 3, an impure liquid inlet manifold 2, an impure liquid outlet manifold 25, an impure liquid outlet 5, an impure liquid inlet valve 4, an impure liquid outlet valve 29 and an impure liquid inlet valve 30; The clean medium system mainly includes a clean medium inlet 12, a clean medium pipeline 9, a clean medium inlet manifold 31, a clean medium outlet 16 and a clean medium outlet manifold 30; the flushing water system mainly includes a flushing water inlet 7, a flushing water pipeline 11, a booster flushing pump 15, a flushing water outlet 17, a flushing water upper manifold 10, a flushing water lower manifold 24, a flushing valve 1 18, a flushing valve 2 19, a drain valve 1 22, a drain valve 2 23 and a drain valve 3 27; the control system mainly includes a control box 13 and corresponding control logic; the supporting support mainly includes a chassis 8 and a support structure 28.

[0039] Among them, the impure liquid inlet 14 is connected to one end of the impure liquid inlet manifold 2 through the impure liquid pipeline 3, and the other end of the impure liquid inlet manifold 2 is connected to the area between the heat exchanger shell 1 and the heat exchange tube 26. One end of the impure liquid outlet manifold 25 is connected to the area between the heat exchanger shell 1 and the heat exchange tube 26, and the other end of the impure liquid outlet manifold 25 is connected to the impure liquid outlet 5 through the impure liquid pipeline 3. A section of the impure liquid pipeline 3 is provided between the impure liquid inlet 14 and the impure liquid outlet 5. An impure liquid inlet valve 4 is provided on the inlet impure liquid pipeline 3 of the impure liquid inlet manifold 2, an impure liquid outlet valve 29 is provided on the outlet impure liquid pipeline 3 of the impure liquid outlet manifold 25, and an impure liquid bypass valve 6 is provided on the impure liquid pipeline 3 directly connected between the impure liquid inlet 14 and the impure liquid outlet 5; a sewage outlet is provided at the bottom of the impure liquid outlet manifold 25, and the sewage outlet is connected to the inlet of the sewage valve 22 through a flushing water pipeline, and the outlet of the sewage valve 22 is connected to the flushing water outlet 17 through a flushing water pipeline 11.

[0040] The clean medium inlet 12 is connected to one end of the clean medium inlet manifold 31 through the clean medium pipeline 9, the other end of the clean medium inlet manifold 31 is connected to the lower end of the area inside the heat exchange tube 26, one end of the clean medium outlet manifold 30 is connected to the upper end of the area inside the heat exchange tube 26, and the other end of the clean medium outlet manifold 30 is connected to the clean medium outlet 16 through the clean medium pipeline 9.

[0041] The flushing water inlet 7 is connected to the inlet of the booster flushing pump 15 through the flushing water pipe 11, and the outlet of the booster flushing pump 15 is connected to the inlet of the flushing valve 18 and the inlet of the flushing valve 2 19 through the flushing water pipe 11 respectively. The outlet of the flushing valve 18 is connected to one end of the flushing water lower header 24 through the flushing water pipe 11, and the outlet of the flushing valve 2 19 is connected to one end of the flushing water upper header 10 through the flushing water pipe 11. The other end of the flushing water lower header 24 is connected to the lower end of the area between the heat exchanger shell 1 and the heat exchange tube 26 The other end of the flushing water upper header 10 is connected to the upper end of the area between the heat exchanger shell 1 and the heat exchange tube 26. A drain outlet is provided at the bottom of the flushing water upper header 10, and the drain outlet is connected to the inlet of the drain valve three 27 through the flushing water pipeline 11, and the outlet of the drain valve three 27 is connected to the flushing water outlet 17 through the flushing water pipe 11. A drain outlet is provided at the bottom of the flushing water lower header 24, and the drain outlet is connected to the inlet of the drain valve two 23 through the flushing water pipe 11, and the outlet of the drain valve two 23 is connected to the flushing water outlet 17 through the flushing water pipe 11.

[0042] The heat exchanger shell 1, the impurity-containing liquid pipeline 3, the clean medium pipeline 9, the flushing water pipeline 11, the booster flushing pump 15 and the control box 13 are all fixed on the chassis 8 through the support structure 28, forming an integrated skid-mounted structure as a whole, which is convenient for the production assembly, transportation and on-site installation of the equipment.

[0043] Preferably, a scraper support plate 21 is provided on the cleaning scraper 20. On the one hand, the scraper support plate 21 is used to enhance the strength of the cleaning scraper 20 to prevent deformation and jamming of the heat exchange tube during the up and down movement; on the other hand, the scraper support plate 21 is set at a certain height to ensure that when the cleaning scraper 20 is at the upper and lower limit positions, the flushing water entering the heat exchanger can only push the cleaning scraper to move from one side, so as to avoid the problem of the cleaning scraper 20 being unable to move.

[0044] Preferably, the matching boundaries between the cleaning scraper 20 and the inner wall of the heat exchanger shell 1 and the heat exchange tube 26 are provided with appropriate spacing, which not only ensures the clearance required for the installation and up and down movement of the cleaning scraper 20, but also ensures that the cleaning scraper 20 forms an effective scraping and cleaning effect on the inner wall of the heat exchanger shell 1 and the outer wall of the heat exchange tube 26.

[0045] Preferably, a remote liquid level gauge is provided on the heat exchanger housing 1 to indicate the liquid level between the heat exchanger housing 1 and the heat exchange tube 26, so as to facilitate guiding the operation and regulation of the device.

[0046] Preferably, a remote pressure gauge is provided on each of the impure liquid medium inlet manifold 2 and the impure liquid medium outlet manifold 25, and the scaling conditions of the inner wall of the heat exchanger shell 1 and the outer wall of the heat exchange tube 26 are judged by the pressure difference data, which is used as the basis for starting the flushing operation.

[0047] The working principle of the intelligent control type online clean heat exchange device provided by the embodiment of the present invention is as follows: the impure liquid enters the impure liquid pipeline 3 from the impure liquid inlet 14, and enters the area between the heat exchange tube 26 and the heat exchanger shell 1 through the impure liquid inlet manifold 2, and exchanges heat with the clean medium in the heat exchange tube 26 through the heat exchange tube wall. The impure liquid that completes the heat exchange process passes through the impure liquid outlet manifold 25 and the impure liquid pipeline 3, and is discharged from the impure liquid outlet 5.

[0048] The clean medium enters the heat exchange tube 26 from the clean medium inlet 12 through the clean medium pipeline 9, and the clean medium exchanges heat with the impurity-containing liquid medium through the heat exchange tube wall. The clean medium that completes the heat exchange is discharged from the clean medium outlet 16 through the clean medium pipeline 9.

[0049] Flushing water enters the boost flushing pump 15 from the flushing water inlet 7 through the flushing water pipe 11. Flushing water discharged from the boost flushing pump 15 enters the flushing water upper header 10 and the flushing water lower header 24 through the flushing water pipe 11. Flushing water enters the area surrounded by the heat exchanger shell 1, the cleaning scraper 20 and the heat exchange tube 26 through the header on one side. Driven by the flushing water pressure, the cleaning scraper 20 is pushed up and down along the length of the heat exchange tube 26, forming a scraping effect on the outer wall of the heat exchange tube 26 and the inner wall of the heat exchanger shell 1. At the same time, high-pressure water is ejected outward at high speed through multiple holes designed on the cleaning scraper 20, forming a hydraulic flushing and cleaning effect on the outer wall of the heat exchange tube 26 and the inner wall of the heat exchanger shell 1, thereby achieving the effect of cleaning the outer wall of the heat exchange tube 26 and the inner wall of the heat exchanger shell 1. The flushing water containing impurities passes through the flushing water header on the other side and is discharged from the flushing water outlet 17 through the flushing water pipe 11, thereby achieving the goal of online cleaning of the heat exchanger.

[0050] The specific control logic of the control box 13 is as follows: in the normal operating mode, the impure liquid inlet valve 4 and the impure liquid outlet valve 29 are in the open state, and the impure liquid bypass valve 6 is in the closed state; when the running resistance on the impure liquid side reaches the flushing threshold or runs for a certain period of time, switch to the flushing mode, that is, open the impure liquid bypass valve 6, close the impure liquid inlet valve 4 and the impure liquid outlet valve 29, open the drain valve 22, and discharge the impure liquid in the heat exchanger through the drain valve 22 and the flushing water outlet 17 to the designated area until the liquid level shows the lowest level, then close the drain valve 22 and start the flushing operation steps; after flushing, open the impure liquid inlet valve 4, when the liquid level shows the highest level, open the impure liquid outlet valve 29, and close the impure liquid bypass valve 6 to complete the switching of the normal operating mode.

[0051] The flushing operation steps of the intelligent online cleaning heat exchange device provided by the embodiment of the present invention are as follows:

[0052] First, open the booster flushing pump 15, flushing valve 2 19 and drain valve 3 27, flushing water enters the heat exchanger from the bottom of the heat exchanger, pushing the cleaning scraper 20 upward, and the sewage is discharged from the top of the heat exchanger through the flushing water pipe 11 and drain valve 3 27 through the flushing water outlet 17 until the liquid level shows the highest level, close the flushing valve 2 19 and drain valve 3 27, and open the flushing valve 1 18 and drain valve 2 23, flushing water enters the heat exchanger from the top of the heat exchanger, pushing the cleaning scraper 20 downward Move, and the sewage is discharged from the bottom of the heat exchanger through the flushing water pipe 11 and the drain valve 23 through the flushing water outlet 17 until the cleaning scraper 20 reaches the bottom of the heat exchanger, turn off the booster flushing pump 15 and the flushing valve 18, and open the drain valve 22 at the same time, and drain the flushing water in the heat exchanger through the flushing water pipe 11 and the drain valve 22 from the flushing water outlet 17 until the liquid level shows the lowest level, and close the drain valve 23 and the drain valve 22, thereby completing the flushing process of the heat exchanger.

[0053] It can be seen from the above embodiments that the intelligent online cleaning heat exchange device provided by the embodiments of the present invention adopts online high-pressure water cleaning technology to realize the anti-blocking function of the heat exchanger, and is suitable for the heat exchange process of liquids containing impurities; it is driven by pressurized water to push the cleaning scraper with a porous structure design to reciprocate up and down, thereby achieving the effective cleaning goal of scale on the outer wall of the heat exchange tube and the inner wall of the heat exchanger shell, and fundamentally solves the scaling and clogging problem of the heat exchanger; it makes full use of the jet flushing and pressure energy driving effect of pressurized water to achieve a uniform and consistent cleaning effect in all heat exchange areas, and solves the problem that local areas cannot be cleaned due to space and position restrictions; it adopts an integrated skid-mounted structure design to facilitate the production, assembly, transportation and on-site installation of the equipment.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0055] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent control type online clean heat exchange device, characterized in that: include: Heat exchange unit, impure liquid system, clean medium system, flushing water system and control system; The heat exchange unit comprises a heat exchanger shell (1), a heat exchange tube (26), a cleaning scraper (20) and a scraper support plate (21); The impurity-containing liquid system comprises an impurity-containing liquid inlet (14), an impurity-containing liquid pipeline (3), an impurity-containing liquid inlet manifold (2), an impurity-containing liquid outlet manifold (25), an impurity-containing liquid outlet (5), an impurity-containing liquid inlet valve (4), an impurity-containing liquid outlet valve (29) and an impurity-containing liquid bypass valve (6); the impurity-containing liquid inlet (14) is connected to one end of the impurity-containing liquid inlet manifold (2) through the impurity-containing liquid pipeline (3), the other end of the impurity-containing liquid inlet manifold (2) is connected to the area between the heat exchanger shell (1) and the heat exchange tube (26), one end of the impurity-containing liquid outlet manifold (25) is connected to the area between the heat exchanger shell (1) and the heat exchange tube (26), and the other end of the impurity-containing liquid outlet manifold (25) is connected to the impurity-containing liquid outlet manifold (25) through the impurity-containing liquid pipeline (3). The impurity liquid outlet (5) is connected to the impurity liquid inlet (14) and the impurity liquid outlet (5). A section of the impurity liquid pipeline (3) is provided between the impurity liquid inlet (14) and the impurity liquid outlet (5). The impurity liquid inlet valve (4) is provided on the inlet impurity liquid pipeline (3) of the impurity liquid inlet manifold (2). The impurity liquid outlet valve (29) is provided on the outlet impurity liquid pipeline (3) of the impurity liquid outlet manifold (25). The impurity liquid pipeline (3) directly connected between the impurity liquid inlet (14) and the impurity liquid outlet (5) is provided with an impurity liquid bypass valve (6). The bottom of the impurity liquid outlet manifold (25) is provided with a sewage outlet, which is connected to the sewage outlet of the sewage valve (22) through a flushing water pipeline, and the sewage outlet of the sewage valve (22) is connected to the flushing water outlet (17) through a flushing water pipeline (11). The clean medium system comprises a clean medium inlet (12), a clean medium pipeline (9), a clean medium inlet header (31), a clean medium outlet (16) and a clean medium outlet header (30); the clean medium inlet (12) is connected to one end of the clean medium inlet header (31) through the clean medium pipeline (9), the other end of the clean medium inlet header (31) is connected to the lower end of the inner area of ​​the heat exchange tube (26), one end of the clean medium outlet header (30) is connected to the upper end of the inner area of ​​the heat exchange tube (26), and the other end of the clean medium outlet header (30) is connected to the clean medium outlet (16) through the clean medium pipeline (9); The flushing water system comprises a flushing water inlet (7), a flushing water pipeline (11), a booster flushing pump (15), a flushing water outlet (17), a flushing water upper header (10), a flushing water lower header (24), a flushing valve 1 (18), a flushing valve 2 (19), a drain valve 1 (22), a drain valve 2 (23) and a drain valve 3 (27); the flushing water inlet (7) is connected to the inlet of the booster flushing pump (15) through the flushing water pipeline (11); the outlet of the booster flushing pump (15) is connected to the inlet of the flushing valve 1 (18) and the inlet of the flushing valve 2 (19) through the flushing water pipeline (11); the outlet of the flushing valve 1 (18) is connected to one end of the flushing water lower header (24) through the flushing water pipeline (11); the outlet of the flushing valve 2 (19) is connected to the inlet of the flushing valve 1 (18) and the inlet of the flushing valve 2 (19) through the flushing water pipeline (11); 1) is connected to one end of the flushing water upper header (10), the other end of the flushing water lower header (24) is connected to the lower end of the area between the heat exchanger shell (1) and the heat exchange tube (26), the other end of the flushing water upper header (10) is connected to the upper end of the area between the heat exchanger shell (1) and the heat exchange tube (26), a sewage outlet is provided at the bottom of the flushing water upper header (10), the sewage outlet is connected to the inlet of sewage valve three (27) through the flushing water pipeline (11), the outlet of sewage valve three (27) is connected to the flushing water outlet (17) through the flushing water pipeline (11), and a sewage outlet is provided at the bottom of the flushing water lower header (24), the sewage outlet is connected to the inlet of sewage valve two (23) through the flushing water pipeline (11), and the outlet of sewage valve two (23) is connected to the flushing water outlet (17) through the flushing water pipeline (11); The control system comprises a control box (13), and the control box (13) is communicatively connected with various valves in the impurity-containing liquid system and the flushing water system.

2. The intelligent online clean heat exchange device according to claim 1, characterized in that: The invention also includes a supporting device, wherein the supporting device includes a chassis (8) and a supporting structure (28); the heat exchanger shell (1), the impurity-containing liquid pipeline (3), the clean medium pipeline (9), the flushing water pipeline (11), the booster flushing pump (15) and the control box (13) are all fixed on the chassis (8) through the supporting structure (28), and the whole constitutes an integrated skid-mounted structure.

3. The intelligent online clean heat exchange device according to claim 1, characterized in that: The cleaning scraper (20) is provided with a scraper support plate (21).

4. The intelligent online clean heat exchange device according to claim 1, characterized in that: The matching boundaries between the cleaning scraper (20), the inner wall of the heat exchanger shell (1) and the heat exchange tube (26) are provided with a gap required to ensure the installation and up and down movement of the cleaning scraper (20).

5. The intelligent online clean heat exchange device according to claim 1, characterized in that: The heat exchanger shell (1) is provided with a remote liquid level gauge for indicating the liquid level between the heat exchanger shell (1) and the heat exchange tube (26).

6. The intelligent online clean heat exchange device according to claim 1, characterized in that: A remote pressure gauge is provided on each of the impurity-containing liquid medium inlet manifold (2) and the impurity-containing liquid medium outlet manifold (25).

7. A control method for an intelligent online clean heat exchange device according to claim 1, characterized in that: include: In the normal operation mode, the impure liquid inlet valve (4) and the impure liquid outlet valve (29) are in an open state, and the impure liquid bypass valve (6) is in a closed state; when the running resistance on the impure liquid side reaches the flushing threshold value or after a preset operation cycle, the system switches to the flushing mode, opens the impure liquid bypass valve (6), closes the impure liquid inlet valve (4) and the impure liquid outlet valve (29), opens the drain valve 1 (22), and discharges the impure liquid in the heat exchanger through the drain valve 1 (22) and the flushing water outlet (17) to the designated area until the liquid level shows the lowest level, at which time the drain valve 1 (22) is closed and the flushing operation steps begin; After flushing is completed, the impure liquid inlet valve (4) is opened, and when the liquid level shows the highest level, the impure liquid outlet valve (29) is opened, and the impure liquid bypass valve (6) is closed, completing the switching of the normal operation mode.

8. The control method of the intelligent online clean heat exchange device according to claim 7, characterized in that: The flushing steps include the following: First, the booster flushing pump (15), flushing valve 2 (19) and drain valve 3 (27) are turned on, and flushing water enters the heat exchanger from the bottom of the heat exchanger, pushing the cleaning scraper (20) to move upward, and the sewage is discharged from the top of the heat exchanger through the flushing water pipe (11) and drain valve 3 (27) through the flushing water outlet (17) until the liquid level shows the highest liquid level, and then the flushing valve 2 (19) and drain valve 3 (27) are closed, and the flushing valve 1 (18) and drain valve 2 (23) are opened, and the flushing water enters the heat exchanger from the top of the heat exchanger, pushing the cleaning scraper (20) downward. The waste water is moved from the bottom of the heat exchanger through the flushing water pipe (11) and the second drain valve (23) and discharged through the flushing water outlet (17) until the cleaning scraper (20) reaches the bottom of the heat exchanger. The booster flushing pump (15) and the flushing valve (18) are turned off, and the drain valve (22) is opened at the same time. The flushing water in the heat exchanger is discharged from the flushing water outlet (17) through the flushing water pipe (11) and the drain valve (22) until the liquid level shows the lowest level. The drain valve (23) and the drain valve (22) are closed, thereby completing the flushing process of the heat exchange device.

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