CN213578847U - Novel self-adaptive resistance adjustment built-in bypass flue gas heat exchanger - Google Patents
Novel self-adaptive resistance adjustment built-in bypass flue gas heat exchanger Download PDFInfo
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- CN213578847U CN213578847U CN202022354085.7U CN202022354085U CN213578847U CN 213578847 U CN213578847 U CN 213578847U CN 202022354085 U CN202022354085 U CN 202022354085U CN 213578847 U CN213578847 U CN 213578847U
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Abstract
A novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger comprises a heat exchanger shell and a heat exchange tube group arranged in the heat exchanger shell; a bypass flue is also arranged in the heat exchanger shell, a valve for controlling the opening and closing of the bypass flue is arranged in the bypass flue, and the valve is controlled by a driving mechanism; the inlet end and the outlet end of the heat exchanger shell are respectively provided with a pressure sensor; and the driving mechanism and the pressure sensor are both connected with the controller. On one hand, the utility model has compact structure and saves initial investment; on the other hand, the automatic pressure adaptation can be realized, the manual operation is not needed, the heat exchange efficiency can be ensured to the maximum extent in the flue gas bypass process, and the safety and the stability of the debugging and running stages of the burner are ensured.
Description
Technical Field
The utility model relates to a heat exchanger equipment, especially a novel built-in bypass gas heater is adjusted to self-adaptation resistance.
Background
Traditional gas flue sets up gas heater and is used for retrieving the flue gas waste heat, when considering flue gas resistance and transition season or no low temperature heat demand, often lean on setting up external bypass pipeline to solve flue gas reposition of redundant personnel and bypass problem, as shown in fig. 1, be equipped with heat transfer pipe group 2 in the heat exchanger casing 1, be equipped with external bypass flue 8 between the entrance point of heat exchanger casing and the exit end, the flue gas carries out the heat transfer through heat transfer pipe group 2, when flue gas pressure increases gradually, open the bypass valve, make partly flue gas reduce the flue gas pressure in heat transfer pipe group 2 through external bypass pipeline 8. However, this mode has several problems: (1) the external bypass pipeline 8 is arranged, so that the occupied space is large and is limited by the field installation space; (2) the secondary installation on site is poor in installation quality, and the installation precision cannot meet the requirement; (3) the bypass valve needs to be manually adjusted in the debugging stage of the gas equipment, so that the debugging difficulty is increased; (4) when the smoke quantity is too large and the smoke resistance exceeds the pressure-bearing range, the phenomena of alarm of a burner and incapability of opening the burner can be caused, and deflagration and even explosion can be caused if the operation is improper; (5) in the actual operation process, the flue resistance cannot be consistent with the back pressure of the combustor, and the flue resistance cannot be effectively controlled; (6) the adjustable range of the flue gas is small, the requirement can not be met after the flue gas is adjusted, the adjustment reaction time is long, and the adjustment is not timely; therefore, how to develop a novel self-adaptive resistance adjustment built-in bypass flue gas heat exchanger, solve above-mentioned technical problem, have important realistic meaning.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the above-mentioned not enough of prior art and providing one kind and saving the initial investment, do not receive the on-the-spot space restriction, heat exchange efficiency is high, need not the novel self-adaptation resistance regulation built-in bypass gas heater of special messenger's operation.
The technical scheme of the utility model is that: a novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger comprises a heat exchanger shell and a heat exchange tube group arranged in the heat exchanger shell; a bypass flue is also arranged in the heat exchanger shell, a valve for controlling the opening and closing of the bypass flue is arranged in the bypass flue, and the valve is controlled by a driving mechanism; the inlet end and the outlet end of the heat exchanger shell are respectively provided with a pressure sensor; and the driving mechanism and the pressure sensor are both connected with the controller.
Further, the valve comprises a rotating shaft and a valve plate, and the driving mechanism is connected with the rotating shaft and controls the valve to rotate.
Further, the driving mechanism is a motor, and the motor is arranged on the heat exchanger shell.
Furthermore, the bypass flue and the heat exchange group are arranged in parallel inside the shell of the heat exchanger.
Furthermore, the bypass flue is communicated with the inlet end and the outlet end of the heat exchanger shell.
Further, the rotation angle of the valve can be adjusted.
Furthermore, the rotating shaft and the valve plate are made of high-temperature-resistant materials, and the temperature resistance is not lower than 150 ℃.
Further, when the valve block rotates to vertical, with the high size looks adaptation of bypass flue, can block that the flue gas passes through from the bypass flue.
Further, the bypass flue is arranged at the upper part or the lower part of the heat exchange tube group; the inlet end and the outlet end are respectively arranged at two sides of the heat exchange tube group and the bypass flue.
Further, the bypass flue is of a straight pipe structure.
The utility model has the advantages that:
(1) the bypass flue is arranged in the heat exchanger, the requirement on site space is low, secondary construction caused by insufficient site conditions can not be caused, an external bypass flue does not need to be added, initial investment is saved, the form of automatically adapting to the flue gas pressure to open the built-in bypass flue is adopted, operation of a specially-assigned person is omitted, manpower is saved, self-adaptive adjustment is sensitive, the conditions of long reaction time and untimely adjustment can not be caused, the opening amplitude of the bypass flue can be adjusted according to the flue gas pressure under various conditions, the flue gas is guaranteed to preferentially pass through the heat exchange tube group, and the heat exchange efficiency is guaranteed to the maximum extent.
(2) Through can carrying out integrated design with traditional heat exchanger and bypass flue, traditional gas heater and flue gas bypass pipe debugging have been solved, a great deal of drawback that exists among the operation process, the burner combustion pressure in the stage of having guaranteed gas equipment initial stage debugging, flue pressure loss suits with the backpressure, simplify the debugging flow, reduce the debugging degree of difficulty, the flue gas resistance does not take place great fluctuation when guaranteeing system operation simultaneously, do not influence the reliability of system operation, adopt the controller to control the valve, automatically, match the flue pressure resistance, reduce the investment and the fault rate of valve and bypass pipeline simultaneously.
Drawings
FIG. 1 is a schematic structural diagram of the background art of the present invention;
FIG. 2 is a schematic structural view of the bypass flue according to the embodiment of the present invention;
FIG. 3 is a schematic structural view of the embodiment of the present invention with the bypass flue fully opened;
fig. 4 is a schematic structural diagram of a heat exchanger (with an external motor) according to an embodiment of the present invention.
The attached drawings indicate the following:
1. a heat exchanger housing; 2. a heat exchange tube set; 3. a pressure sensor; 4. a bypass flue; 5. a rotating shaft; 6. a valve plate; 7. a motor; 8. and a bypass flue is arranged outside.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
As shown in fig. 2 to 4: a novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger comprises a heat exchanger shell 1 and a heat exchange tube group 2 arranged in the heat exchanger shell 1; a bypass flue 4 is also arranged in the heat exchanger shell 1, a valve for controlling the opening and closing of the bypass flue is arranged in the bypass flue 4, and the valve is controlled by a driving mechanism; the inlet end and the outlet end of the heat exchanger shell 1 are respectively provided with a pressure sensor 3; the driving mechanism and the pressure sensor 3 are both connected with a controller.
The scheme has the following advantages: on one hand, the built-in bypass flue is designed in the heat exchanger shell, so that the heat exchanger shell does not occupy the external space, has low requirement on site space, does not cause secondary construction caused by insufficient site conditions, does not need to be additionally provided with an external bypass flue, and saves the initial investment; on the other hand, through set up pressure sensor at the exit end, can utilize the pressure differential of exit end to come the aperture of regulating valve, form the self-adaptation regulation, saved the special messenger operation, save the manual work, the self-adaptation regulation reaction is sensitive, can not cause the condition that reaction time is long, the regulation is untimely, and the self-adaptation regulation can be according to the flue gas pressure under the various condition to the amplitude of opening of bypass flue adjust, guarantees that the flue gas is preferred to pass through from the heat exchange tube group, guarantees heat exchange efficiency the most.
In this embodiment, the bypass flue 4 is preferably designed to be a straight pipe structure, so that the phenomena of dust deposition and dust blockage are not easy to occur, and the later maintenance cost is saved. The straight pipe is connected between the inlet end and the outlet end, and the valve is arranged in the straight pipe.
In this embodiment, the valve includes pivot 5 and valve block 6, and actuating mechanism is motor 7, and motor 7 installs in the outside of heat exchanger casing 1, and motor 7 passes through the motor shaft and connects pivot 5, drives valve block 6 and rotates, controls opening and close of bypass flue 4. Preferably, the rotation shaft 5 is connected to a middle portion of the valve sheet 6. The bypass flue 4 is arranged at the lower part of the heat exchange tube group 2, and the bypass flue 4 is arranged in parallel with the heat exchange tube group 2; the inlet end and the outlet end are respectively arranged at two sides of the heat exchange tube group 2 and the bypass flue 4, and the bypass flue 4 and the heat exchange tube group 2 are communicated with the inlet end and the outlet end of the heat exchanger shell 1. The pressure sensors 3 arranged on the inlet side and the outlet side are used for detecting the pressure difference of the inlet and the outlet of the heat exchanger, and when the pressure difference reaches a set value, the linkage motor 7 rotates the rotating shaft 5, so that the bypass flue 4 is opened. The pressure sensor 3 can be set with a plurality of sections of set values, and when the smoke pressure is detected to be gradually increased to the set value of each section, the motor 7 can control the rotation angle of the rotating shaft 5 to be gradually increased, so that the opening amplitude of the bypass flue 4 is enlarged.
When the flue gas begins to pass through the heat exchanger, the bypass flue 4 is in a closed state, namely the valve plates 6 in the bypass flue 4 are vertically arranged, and the flue gas preferentially passes through the heat exchange tube set 2 to perform a heat exchange process. When the smoke pressure gradually increases and reaches the pressure difference value set by the pressure sensor 3 at the inlet and the outlet, the signal is sent to the controller, the motor 7 is controlled by the controller to rotate the valve plate 6 in the bypass flue 4, the angle of the rotary valve plate 6 can be selected according to the pressure difference value of each section, and the bypass flue 4 can be completely opened and unblocked to the maximum extent. It can be said that, the heat exchanger of this embodiment is when the flue gas passes through, preferentially ensures debugging, operation safety and stability, and then the preferential guarantee enters heat exchange tube group 2 and carries out the heat transfer process, guarantees heat exchange efficiency.
In this embodiment, the built-in valve plate 6 is adapted to the internal size of the bypass flue 4, so as to ensure that no smoke is leaked when the bypass flue 4 is closed. When valve block 6 rotated to vertical promptly, with bypass flue 4's height size looks adaptation, can block that the flue gas passes through from bypass flue 4. When the valve plate 6 is slightly inclined or horizontally arranged, smoke can pass through. The two pressure sensors 3 monitor the front and back pressure difference values of the heat exchanger shell 1 in real time, and the opening angle of the valve plate 6 is controlled by the controller in a linkage mode through setting a plurality of sections of set values, so that the bypass flue 4 is opened and closed. Simple structure is novel, and convenient operation is swift, is convenient for maintain and change.
In this embodiment, because the rotating shaft 5 and the valve plate 6 are arranged in the bypass flue 4 and can pass through high-temperature flue gas, the rotating shaft 5 and the valve plate 6 are made of high-temperature resistant materials, can resist temperature not lower than 150 ℃, preferably 150-300 ℃, and can ensure that the high-temperature flue gas does not deform after passing through.
The working principle of the embodiment is as follows:
when the heat exchanger is just started for heat exchange, the internal pressure of the heat exchanger is within a rated range, the bypass flue 4 is in a closed state, and all the flue gas passes through the heat exchange tube set 2. At this moment, the heat exchanger realizes the effect of quick heat transfer.
When the smoke amount is continuously increased, the pressure value at the inlet end side of the heat exchanger is P1, the pressure value at the outlet end side of the heat exchanger is P2, the pressure difference value at the front end and the rear end is delta P = P1-P2, when the delta P value reaches the set lowest value of motor linkage starting, the motor 7 rotates the valve plate 6 in the bypass flue 4, and a part of smoke can pass through the bypass flue 4, so that the combustion machine alarm caused by overhigh smoke resistance of the heat exchanger is avoided.
When the smoke volume continues to increase, every time the delta P value reaches the artificially set pressure value of each section, the rotation angle of the valve plate 6 driven by the motor 7 is increased along with the increase of the delta P until the valve plate 6 rotates 90 degrees, the bypass flue 4 is completely opened, the quick smoke passing effect is realized, and the pressure of the front inlet end and the rear inlet end of the heat exchanger is balanced.
When the smoke amount is gradually reduced, the motor 7 drives the valve plate 6 to gradually reduce the rotating angle along with the reduction of the delta P until the bypass flue 4 is completely closed.
To sum up, the utility model discloses a make up heat exchanger and bypass flue, have following advantage:
firstly, the construction space is saved, secondary construction on site is not caused, an external bypass flue does not need to be additionally arranged, and the initial investment is saved.
Secondly, the adjustable range of flue gas is big, and the regulation reaction is sensitive, can not cause because of adjusting the combustor warning phenomenon that leads to in time.
And thirdly, the built-in bypass flue is designed as a straight pipe, so that the phenomena of dust accumulation and dust blockage are not easy to cause, and the later maintenance cost is saved.
And fourthly, the smoke resistance is automatically adapted, the bypass flue is automatically adjusted to be opened and closed, special operation is not needed, labor is saved, and time and labor are saved.
Fifthly, the pressure difference limit value can be adjusted according to the back pressure and the pressure loss of the combustor and the heat exchanger, the flue resistance is self-adjusted and adapted, and the safety and the stability of debugging and operation are ensured.
Claims (10)
1. A novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger comprises a heat exchanger shell and a heat exchange tube group arranged in the heat exchanger shell; the heat exchanger is characterized in that a bypass flue is also arranged in the heat exchanger shell, a valve for controlling the opening and closing of the bypass flue is arranged in the bypass flue, and the valve is controlled by a driving mechanism; the inlet end and the outlet end of the heat exchanger shell are respectively provided with a pressure sensor; and the driving mechanism and the pressure sensor are both connected with the controller.
2. The novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger as claimed in claim 1, wherein the valve comprises a rotating shaft and a valve plate, and the driving mechanism is connected with the rotating shaft to control the rotation of the valve.
3. The novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger according to claim 1, wherein the driving mechanism is a motor, and the motor is arranged on the heat exchanger shell.
4. The novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger according to claim 1, 2 or 3, wherein the bypass flue and the heat exchange tube group are arranged in parallel inside the heat exchanger shell.
5. The novel adaptive resistance tuning built-in bypass flue gas heat exchanger according to claim 1, 2 or 3, wherein the bypass flue is in communication with both the inlet end and the outlet end of the heat exchanger housing.
6. The novel adaptive resistance tuning built-in bypass flue gas heat exchanger according to claim 1, 2 or 3, wherein the rotation angle of the valve can be adjusted.
7. The novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger according to claim 2, wherein the rotating shaft and the valve plate are made of high-temperature-resistant materials and can resist temperature of not less than 150 ℃.
8. The novel self-adaptive resistance adjustment built-in bypass flue gas heat exchanger according to claim 2, wherein when the valve plate rotates to be vertical, the valve plate is matched with the height of the bypass flue, and can prevent flue gas from passing through the bypass flue.
9. The novel adaptive resistance adjustment built-in bypass flue gas heat exchanger according to claim 1, 2 or 3, wherein the bypass flue is arranged at the upper part or the lower part of the heat exchange tube set; the inlet end and the outlet end are respectively arranged at two sides of the heat exchange tube group and the bypass flue.
10. The novel self-adaptive resistance-adjusting built-in bypass flue gas heat exchanger according to claim 1, 2 or 3, wherein the bypass flue is of a straight pipe structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022354085.7U CN213578847U (en) | 2020-10-21 | 2020-10-21 | Novel self-adaptive resistance adjustment built-in bypass flue gas heat exchanger |
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| CN202022354085.7U CN213578847U (en) | 2020-10-21 | 2020-10-21 | Novel self-adaptive resistance adjustment built-in bypass flue gas heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589875A (en) * | 2021-07-29 | 2021-11-02 | 沈阳蓝天智慧燃气供热有限公司 | Automatic pressure stabilizer of gas boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589875A (en) * | 2021-07-29 | 2021-11-02 | 沈阳蓝天智慧燃气供热有限公司 | Automatic pressure stabilizer of gas boiler |
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