CN210952496U - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
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- CN210952496U CN210952496U CN201921940755.4U CN201921940755U CN210952496U CN 210952496 U CN210952496 U CN 210952496U CN 201921940755 U CN201921940755 U CN 201921940755U CN 210952496 U CN210952496 U CN 210952496U
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Abstract
The utility model provides a heat exchange device, which comprises a controller and a heat exchanger, wherein the heat exchanger comprises an inlet, an outlet and a plurality of heat exchange passages connected in parallel between the inlet and the outlet, the heat exchange passages are provided with a detection device and an electric control valve, and the controller is respectively electrically connected with the detection device and the electric control valve; the detection device comprises a flowmeter, the flowmeter is used for detecting the flow of the heat exchange medium in the heat exchange passage and sending a flow detection signal to the controller when the flow reaches a flow threshold value; the controller receives the flow detection signal and sends a closing signal to the electronic control valve on at least one other heat exchange passage so as to close the at least one other heat exchange passage through the electronic control valve; the heat exchange medium passes through the heat exchange passage in an open state at a relatively high flow speed, so that the heat exchange passage is cleaned in the running state of the heat exchange device, and the overhaul or replacement cost is reduced.
Description
Technical Field
The utility model belongs to the heat transfer device field, in particular to heat transfer device.
Background
At present, a shell and tube heat exchanger is a relatively common heat exchange device, and a coal gasification device system can achieve the purpose of waste heat recovery through the shell and tube heat exchanger.
However, since most of the heat exchangers are metal tube heat exchangers, slag water with high temperature and high pressure flows through the tubes, and gas or liquid to be preheated flows through the tubes. Generally, the slag water contains ash and slag, and the resistance brought by the tubular heat exchanger deposits ash and even scales on the inner wall of the heat exchange tube of the tubular heat exchanger after long-time operation, so that the heat efficiency of the heat exchanger is greatly reduced.
Because the cleaning method of the tubular heat exchanger is very troublesome, the pressing cover of the tubular heat exchanger needs to be opened, and then each heating pipe is sprayed and cleaned by a high-pressure water gun. Therefore, the cleaning process of the tube type heat exchanger consumes a long time and large labor, and is a great waste of manpower resources; in addition, water can not be recycled in the process of spraying by the high-pressure water gun, and water resources are wasted.
Because the special tubular structure of the tubular heat exchanger is difficult to clean thoroughly, the influence of most enterprises and individuals on the scaling of the heat exchange equipment and the cleaning process are still in the aspects of the traditional 'destructive' processes and concepts such as machinery, high-pressure water, chemical pickling and the like; generally, equipment cleaning is considered only under the condition of seriously influencing production, so that the influence on energy consumption of an enterprise after scale generation is often ignored, and the profit of the enterprise is engulfed.
However, in order to reduce the cleaning costs, cleaning methods which are damaging and corrosive to the plant are selected, which results in plant scrap and production stoppage, for which a cost which is several times higher than that of cleaning agents is paid. For example, when oxalic acid is used for cleaning heat exchange equipment, the cleaning frequency is increased, the shutdown and production stop time is correspondingly increased, and the loss is indirectly caused to enterprises.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problem that exists among the prior art, the utility model provides a can the self-cleaning heat transfer device of scale deposit on the heat transfer route.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
a heat exchange device comprises a controller and a heat exchanger, wherein the heat exchanger comprises an inlet, an outlet and a plurality of heat exchange passages connected in parallel between the inlet and the outlet, a detection device and an electric control valve are arranged on each heat exchange passage, and the controller is respectively electrically connected with the detection device and the electric control valve;
the detection device comprises a flowmeter, the flowmeter is used for detecting the flow of the heat exchange medium in the heat exchange passage and sending a flow detection signal to the controller when the flow reaches a flow threshold value;
the controller receives the flow detection signal and sends a closing signal to the electric control valve on at least one other heat exchange passage so as to close the at least one other heat exchange passage through the electric control valve.
Optionally, the detection device further comprises a thermometer, and the thermometer is configured to detect a temperature of a heat exchange medium in the heat exchange passage where the thermometer is located, and send a temperature detection signal to the controller when the temperature reaches a temperature threshold;
and when receiving the temperature detection signal and/or the flow detection signal, the controller sends a closing signal to the electric control valve on at least one other heat exchange passage.
Optionally, the electrically controlled valve is a solenoid valve.
Optionally, the controller is a PLC controller.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the heat exchange device provided by the embodiment of the utility model detects the flow of the heat exchange medium in the heat exchange passage through the flowmeter, and sends a flow detection signal to the controller when the flow reaches a flow threshold value, wherein the flow threshold value is used for representing that the heat exchange passage is likely to be scaled; the controller receives the flow detection signal and sends a closing signal to at least one of the other heat exchange passages through the electric control valve to close at least one of the other heat exchange passages, so that the heat exchange medium flowing through the plurality of heat exchange passages originally can only pass through one heat exchange passage in an open state at the moment, and therefore, due to the increase of hydraulic pressure of the heat exchange medium, the flow velocity of the heat exchange medium is inevitably increased greatly relative to the previous flow velocity, scale in the heat exchange passages can be effectively flushed, the cleaning purpose is achieved, the problem that the heat exchange efficiency is reduced due to scale formation of the heat exchange passages is avoided, the heat exchange device is enabled to maintain high heat exchange efficiency, the damage of the scale to the heat exchange passages is avoided, the service life of the heat exchange device is prolonged, and the overhaul or replacement cost is correspondingly reduced.
Because the utility model discloses heat transfer device realizes automatic control, and does not set up cyclic utilization's solid particle thing in the heat transfer route, like bobble, clean pearl etc for heat transfer device's structure is more simple, and it is more convenient to operate, effectively reduces intensity of labour.
Drawings
Fig. 1 is a schematic structural diagram of a heat exchange device according to an embodiment of the present invention.
Description of the reference numerals
1 inlet 2 heat exchange path 3 flowmeter
4 thermometer 5 electric control valve 6 controller 7 outlet
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but not intended to limit the invention thereto. For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings. Embodiments of the present disclosure are described in further detail below with reference to the figures and the detailed description, but the present disclosure is not limited thereto.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
Referring to fig. 1, in the normal operation process of the heat exchange device of the embodiment of the present application, especially after the deposition of ash and even scaling is generated in the heat exchange passage 2 of the heat exchange device, the thermal efficiency of the heat exchanger is directly reduced greatly, and the scaling in the heat exchange passage 2 resides for a long time, which makes the post-cleaning more difficult. However, after the heat exchange path 2 is cleaned by conventional methods, such as mechanical, high-pressure water, chemical acid cleaning, etc., the heat exchange path 2 is seriously damaged, and the service life of the heat exchange device is shortened.
In addition, it should be noted that the heat exchange medium in the heat exchange path 2 of the embodiment of the present invention is a liquid containing different solid particulate matters, such as slag water, sewage, etc.
In order to avoid the technical problem, an embodiment of the present invention discloses a heat exchange device, which, with reference to fig. 1, includes a controller 6 and a heat exchanger, the heat exchanger includes an inlet 1, an outlet 7 and a plurality of heat exchange paths 2 connected in parallel between the inlet 1 and the outlet 7, the heat exchange paths 2 are provided with a detection device and an electric control valve 5, and the controller 6 is electrically connected with the detection device and the electric control valve 5 respectively; the detection device comprises a flowmeter 3, wherein the flowmeter 3 is used for detecting the flow of the heat exchange medium in the heat exchange passage 2 and sending a flow detection signal to the controller 6 when the flow reaches a flow threshold value; the controller 6 receives the flow detection signal and sends a closing signal to the electronic control valve 5 on the other at least one heat exchange passage 2 so as to close the other at least one heat exchange passage 2 through the electronic control valve 5. The at least one other heat exchange path 2 is at least one heat exchange path 2 other than the heat exchange path 2 in which the flow meter 3 that transmits the flow rate detection signal is located, among the plurality of heat exchange paths 2 of the heat exchanger.
In the embodiment of the present invention, the heat exchange path 2 is a pipeline composed of different structures, shapes or different materials.
Because the utility model discloses heat transfer device passes through automatic control, implements the cleanness and maintains heat transfer route 2 and be in higher heat exchange efficiency, still prevents heat transfer route 2's excessive wearing and tearing simultaneously. Particularly, once the heat exchange passages 2 are scaled, the inner diameter of the heat exchange passages is reduced, the flow rate is reduced, the flow meter 3 detects the flow rate of the heat exchange medium in the heat exchange passage 2 in real time, and sets a flow rate threshold value for representing the possible scaling of the heat exchange passage 2, when the flow meter 3 detects that the flow rate of the heat exchange medium in the heat exchange passage 2 reaches the flow rate threshold value, the flow rate detection signal is sent to the controller 6, the controller 6 closes at least one other heat exchange passage 2 through the electric control valve 5, so that the heat exchange medium originally flowing through the heat exchange passages 2 can only pass through one heat exchange passage 2 in an open state, and therefore, due to the increase of the hydraulic pressure of the heat exchange medium, the flow rate of the heat exchange medium is inevitably increased greatly relative to the previous flow rate, the scaling in the heat exchange passages 2 can be effectively washed, and the, the manual participation is not needed, and the operation of the whole detection process is more accurate. In addition, because can in time accurately discover to take place the scale deposit and carry out timely processing in the heat transfer route 2, effectively avoid the scale deposit to the damage of heat transfer route 2, improve heat transfer device's life from this, and because carry out cleaning under the shutdown state that need not, and then correspondingly reduce maintenance or replacement cost.
In some embodiments, in order to improve the real-time evaluation of the internal scaling condition of the heat exchange passage 2, the detection device further comprises a thermometer 4, and the thermometer 4 is configured to detect the temperature of the heat exchange medium in the heat exchange passage 2 and send a temperature detection signal to the controller 6 when the temperature reaches a temperature threshold; and when receiving the temperature detection signal and/or the flow detection signal, the controller 6 sends a closing signal to the electronic control valve 5 on the other at least one heat exchange passage 2. Because the flow and the temperature of the heat exchange medium have different degrees of influence on the generation of the scale, in the specific implementation process, on the basis of combining the physical attributes of the heat exchange medium, the corresponding relation is set between the flow and the temperature of the scale and the current state of the scale is obtained through the corresponding relation after the flow and the temperature which are correspondingly detected by the flowmeter 3 and the thermometer 4, and then the decision of cleaning is made, so that an accurate basis is provided for automatically cleaning the scale.
In some embodiments, the electrically controlled valve 5 is a solenoid valve. The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. The electromagnetic valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured.
In some embodiments, the controller 6 is a PLC controller 6. The PLC controller 6 is a programmable logic controller 6, wherein the programmable logic controller 6 is a digital operation controller 6 with a microprocessor for automatic control, and can load control instructions into a memory at any time for storage and execution. In this embodiment, since the measurement parameter varies with the sectional area of the heat exchange path 2 of the heat exchange device, the composition of the heat exchange medium flowing through the heat exchange path 2, the flow rate, and other parameters, the PLC controller 6 can adjust the measurement parameter in time.
In order to fully understand the work flow of the embodiment of the present invention, the exemplary configuration shown in fig. 1 is used as an example for description, and specifically, reference may be made to fig. 1.
When the heat exchange device only comprises two heat exchange passages 2, the flow meter 3 detects the flow of the heat exchange medium in the heat exchange passage 2, and sends a flow detection signal to the controller 6 when the flow of one heat exchange passage 2 reaches a flow threshold value; and after receiving the flow detection signal, the controller 6 sends a closing signal to the electric control valve 5 on the other heat exchange passage 2, and closes the other heat exchange passage 2 through the electric control valve 5.
In a specific implementation process, the temperature of the heat exchange medium in the heat exchange passage 2 can be combined and comprehensively considered with the flow, and since the flow and the temperature are measurement parameters, the temperature can be adjusted according to the physical structure of the heat exchange passage 2 in the measurement process, and the threshold range is adjusted correspondingly.
In addition, as shown in fig. 1, when the heat exchange device includes only three or more than three heat exchange paths 2, it is considered that the probability that two heat exchange paths 2 simultaneously satisfy the threshold value is very small in the practical application process, however, it is not excluded in the embodiment of the present application that the condition that the heat exchange media in two heat exchange paths 2 simultaneously satisfy the threshold value occurs. Therefore, in order to understand the working process of the embodiment of the present application, only when the measured parameter of the heat exchange medium in one heat exchange path 2 satisfies the threshold value, at this time, the above process is repeated, that is, after the controller 6 receives the flow detection signal, the controller sends a closing signal to the electronic control valves 5 on the other two or more heat exchange paths 2, and finally closes the other two or more heat exchange paths 2, and only one heat exchange path 2 is kept in the continuously opened state.
The heat exchange medium passes through the above-mentioned flow path in the heat exchange path 2 for the heat exchange medium that originally flows through a plurality of heat exchange paths 2 can only pass through from a heat exchange path 2 that is in the open condition this moment, consequently, because the increase of heat exchange medium's hydraulic pressure, must lead to the velocity of flow of heat exchange medium to improve by a wide margin for the velocity of flow before, and then can effectively erode the scale deposit in the heat exchange path 2, reach abluent purpose.
Moreover, although illustrative embodiments have been described herein, the scope includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of aspects across various embodiments), adaptations or alterations based on the present disclosure. The elements in the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the specification or during the life of the application. Further, the steps of the disclosed methods may be modified in any manner, including by reordering steps or inserting or deleting steps. It is intended, therefore, that the description be regarded as examples only, with a true scope being indicated by the following claims and their full scope of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other embodiments may be utilized, for example, by one of ordinary skill in the art, upon reading the above description. Also, in the foregoing detailed description, various features may be combined together to simplify the present disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
Claims (4)
1. A heat exchange device is characterized by comprising a controller and a heat exchanger, wherein the heat exchanger comprises an inlet, an outlet and a plurality of heat exchange passages connected in parallel between the inlet and the outlet, the heat exchange passages are provided with a detection device and an electric control valve, and the controller is respectively electrically connected with the detection device and the electric control valve;
the detection device comprises a flowmeter, the flowmeter is used for detecting the flow of the heat exchange medium in the heat exchange passage and sending a flow detection signal to the controller when the flow reaches a flow threshold value;
the controller receives the flow detection signal and sends a closing signal to the electric control valve on at least one other heat exchange passage so as to close the at least one other heat exchange passage through the electric control valve.
2. The heat exchange device of claim 1, wherein the detection device further comprises a thermometer, and the thermometer is used for detecting the temperature of the heat exchange medium in the heat exchange passage and sending a temperature detection signal to the controller when the temperature reaches a temperature threshold value;
and when receiving the temperature detection signal and/or the flow detection signal, the controller sends a closing signal to the electric control valve on at least one other heat exchange passage.
3. The heat exchange device of claim 1, wherein the electrically controlled valve is a solenoid valve.
4. The heat exchange device of claim 1, wherein the controller is a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921940755.4U CN210952496U (en) | 2019-11-11 | 2019-11-11 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921940755.4U CN210952496U (en) | 2019-11-11 | 2019-11-11 | Heat exchanger |
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| CN210952496U true CN210952496U (en) | 2020-07-07 |
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| CN201921940755.4U Active CN210952496U (en) | 2019-11-11 | 2019-11-11 | Heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781431A (en) * | 2019-11-11 | 2021-05-11 | 航天长征化学工程股份有限公司 | Heat exchange device and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781431A (en) * | 2019-11-11 | 2021-05-11 | 航天长征化学工程股份有限公司 | Heat exchange device and control method thereof |
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