Waste heat recovery multi-mode switching device

Abstract

The utility model discloses a multi-mode switching device for waste heat recovery, which belongs to the technical field of waste heat recovery and comprises a support frame mechanism and a switching mechanism, the switching mechanism for switching waste heat recovery modes is arranged on the support frame mechanism, and the switching mechanism is arranged on the support frame mechanism. The switching mechanism is connected with a heat exchange mechanism used for recycling waste heat, and a frequency conversion induced draft fan used for introducing high-temperature gas is fixed to the heat exchange mechanism. Through the arrangement of the supporting frame mechanism, the switching mechanism, the heat exchange mechanism and the variable-frequency induced draft fan, switching of heat exchange modes of the waste heat recovery mechanism is achieved, one waste heat recovery mechanism can conduct heat exchange through two heat exchange modes, and the applicability of the device is improved; when the device is switched from a gas-liquid heat exchange mode to a gas-gas heat exchange mode, the dehumidification mechanism can effectively adsorb and filter water vapor formed by evaporation of residual liquid in the cold fluid channel.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat recovery technical field, especially a waste heat recovery multi-mode switching device. BACKGROUND

[0002] In many industrial activities, such as steel smelting, chemical production, cement manufacturing, etc., a large amount of waste heat will be generated, which exists in the form of high-temperature exhaust gas, wastewater or solid waste. Through a waste heat recovery mechanism, this heat energy can be recovered and reused. Waste heat recovery can be divided into gas-gas heat exchange mode, gas-liquid heat exchange mode or liquid-liquid heat exchange mode.

[0003] When people use waste heat, they need to use gaseous high-temperature medium in power generation, drying, etc., and they need to use liquid medium in heating and domestic water supply. Since the existing waste heat recovery mechanism has a single recovery mode and cannot switch the waste heat recovery mode, it can only output one kind of high-temperature medium. When the user needs to use both gaseous waste heat and gaseous waste heat, they can only use two different waste heat recovery systems to recover waste heat, greatly increasing the cost of waste heat recovery.

[0004] Therefore, there is an urgent need to provide a waste heat recovery multi-mode switching device to solve the above problems. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a waste heat recovery multi-mode switching device.

[0006] To solve the above technical problems, one technical scheme of the utility model is to provide a waste heat recovery multi-mode switching device, which comprises a support frame mechanism and a switching mechanism. The support frame mechanism is provided with a switching mechanism for switching the waste heat recovery mode. The switching mechanism is connected with a heat exchange mechanism for recovering waste heat.

[0007] A variable frequency induced draft fan for introducing high-temperature gas is fixed on the heat exchange mechanism.

[0008] An outlet three-way valve is also fixed on the heat exchange mechanism, and a dehumidification mechanism is fixed at the other end of the outlet three-way valve.

[0009] The utility model is further provided as follows: the support frame mechanism comprises a frame body, a double-control switch is fixed on the frame body, a PLC controller is also fixed on the frame body, and the double-control switch and the PLC controller are electrically connected.

[0010] Through the technical scheme, the switching mechanism is lifted by the frame body, so that the switching mechanism is convenient for the staff to operate and maintain, and the switching mechanism is away from the sewage and dust on the ground, the double control switch is electrically connected with the PLC controller, and when any one line of the double control switch is in the power-on state or the double control switch is in the off state, the PLC controller can receive the corresponding signal.

[0011] The utility model further sets up: the switching mechanism includes the water pump of fixed in the frame body top, the output of water pump is fixed with check valve, the other end of check valve is fixed with inlet three way valve, still fixed with the gas delivery fan on the frame body.

[0012] Through the technical scheme, the gas delivery fan is provided with the same check valve mechanism as the water pump, the inlet three way valve is an electronic three way valve, the gas delivery fan and the water pump are communicated with two inlets of the inlet three way valve respectively, and the gas delivery fan and the water pump are also electrically connected with the PLC controller, when the double control switch is closed, the water pump and the gas delivery fan are not started, when one line of the double control switch is powered on, the PLC controller controls the inlet three way valve to open the channel connected with the water pump, and starts the water pump, at this moment, the heat exchange mechanism is gas-liquid heat exchange mode, when another line of the double control switch is powered on, the PLC controller controls the inlet three way valve to open the channel connected with the gas delivery fan, and closes the water pump, and starts the gas delivery fan, at this moment, the heat exchange mechanism is gas-gas heat exchange mode, and the PLC controller also reduces the frequency of the frequency conversion induced draft fan, thereby reducing the flow rate of the high-temperature gas in the primary pipe network, increasing the heat exchange time between the gases, and avoiding the mismatch between the heat flow rate of the primary pipe network and the heat exchange mode.

[0013] The utility model further sets up: the heat exchange mechanism includes the pipe pass inlet connected with the other end of inlet three way valve, the other end of pipe pass inlet is connected with heat exchanger body, the other end of heat exchanger body is connected with pipe pass outlet.

[0014] Through the technical scheme, the pipe pass inlet and the pipe pass outlet are connected with two ends of the cold fluid channel in the heat exchanger body respectively, the cold fluid channel is made of metal material with good corrosion resistance and heat conductivity, such as aluminum alloy or copper alloy, when the heat exchanger body exchanges heat, the low-temperature medium enters from the pipe pass inlet and flows out from the pipe pass outlet.

[0015] The utility model further sets up: the top of heat exchanger body is provided with shell pass inlet, the top of heat exchanger body is also provided with shell pass outlet.

[0016] Through the technical scheme, the shell side inlet and the shell side outlet are connected with two ends of the hot fluid channel in the heat exchanger body respectively, when the heat exchanger body exchanges heat, the high-temperature medium enters from the shell side inlet and flows out from the shell side outlet, when the high-temperature medium passes through the hot fluid channel, heat is transferred to the low-temperature medium in the cold fluid channel, so that heat exchange is realized, and the variable frequency induced draft fan is fixed with the shell side inlet, when the variable frequency induced draft fan changes the frequency, the flow rate of the high-temperature medium in the hot fluid channel also changes.

[0017] The dehumidification mechanism further comprises a shell connected with the outlet three-way valve, and a metal mesh cover is fixed to an inner wall of one side of the shell.

[0018] Through the technical scheme, the outlet three-way valve is also an electronic three-way valve, and the outlet three-way valve is electrically connected with the PLC controller, two outlets of the outlet three-way valve can be connected with the gas secondary heat network and the liquid secondary heat network respectively, when the device switches modes, the PLC controller also controls the outlet three-way valve to open the channel of the corresponding medium, and the dehumidification mechanism is connected with the gas outlet end of the outlet three-way valve.

[0019] The metal mesh cover is externally provided with a molecular sieve adsorption layer, and the molecular sieve adsorption layer is externally provided with a polypropylene filter cloth layer.

[0020] Through the technical scheme, the metal mesh cover is in a cylindrical shape, when the hot gas flow passes through the dehumidification mechanism, the hot gas flow passes through the metal mesh cover, the molecular sieve adsorption layer and the polypropylene filter cloth layer, the metal mesh cover is made of stainless steel and has good corrosion resistance, the molecular sieve adsorption layer can adsorb water vapor in the gas flow, and the polypropylene filter cloth layer can filter water vapor in the gas flow, so that the dehumidification effect is further improved, thereby adsorbing and filtering water vapor formed by evaporation of residual water in the cold fluid channel, and the cylindrical metal mesh cover increases the passing area of the gas, reduces the gas resistance and improves the filtering and dehumidification efficiency.

[0021] The utility model discloses the beneficial effects are as follows:

[0022] 1. The utility model discloses a support frame mechanism, switching mechanism, heat exchange mechanism and the setting of variable frequency induced draft fan, realized the switching of waste heat recovery mechanism heat exchange mode, make a set of waste heat recovery mechanism can heat exchange through two kinds of heat exchange mode, improved the applicability of the device.

[0023] 2. The utility model discloses the setting of dehumidification mechanism, when the device switches from gas-liquid heat exchange mode to gas-gas heat exchange mode, dehumidification mechanism can effectively adsorb and filter water vapor formed by evaporation of residual liquid in the cold fluid channel. DRAWINGS

[0024] Figure 1 It is the first view structure diagram of the utility model;

[0025] Figure 2 It is the second perspective structure drawing of the utility model;

[0026] Figure 3 It is the support frame mechanism and switching mechanism partial structure drawing of the utility model;

[0027] Figure 4 It is the section view of the dehumidification mechanism of the utility model.

[0028] In the drawing: 1, support frame mechanism; 101, frame body; 102, double control switch; 103, PLC controller; 2, switching mechanism; 201, water pump; 202, check valve; 203, inlet tee valve; 204, gas delivery fan; 3, heat exchange mechanism; 301, pipe passage inlet; 302, heat exchanger body; 303, pipe passage outlet; 304, shell passage inlet; 305, shell passage outlet; 4, frequency conversion induced fan; 5, outlet tee valve; 6, dehumidification mechanism; 601, shell; 602, metal mesh cover; 603, molecular sieve adsorption layer; 604, polypropylene filter cloth layer. DETAILED DESCRIPTION

[0029] The preferred embodiments of the utility model are described in detail below in combination with the drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0030] Please refer to Figures 1-4 A waste heat recovery multi-mode switching device, comprising a support frame mechanism 1 and a switching mechanism 2, the support frame mechanism 1 comprises a frame body 101, the frame body 101 is fixed with a double control switch 102, the frame body 101 is also fixed with a PLC controller 103, the double control switch 102 is electrically connected with the PLC controller 103, the frame body 101 lifts the switching mechanism 2, which can facilitate the operation and maintenance of the staff, and can make the switching mechanism 2 away from the sewage and dust on the ground, the double control switch 102 is electrically connected with the PLC controller 103, when either line of the double control switch 102 is in the power-on state or the double control switch 102 is in the open circuit state, the PLC controller 103 can receive the corresponding signal.

[0031] As Figure 1 And Figure 3As shown, the support frame mechanism 1 is provided with a switching mechanism 2 for switching the waste heat recovery mode, the switching mechanism 2 includes a water pump 201 fixed on the top of the frame body 101, the output end of the water pump 201 is fixed with a check valve 202, the other end of the check valve 202 is fixed with an inlet three-way valve 203, the frame body 101 is also fixed with a gas conveying fan 204, the gas conveying fan 204 is provided with the same check valve 202 mechanism as the water pump 201, the inlet three-way valve 203 is an electronic three-way valve, and the gas conveying fan 204 and the water pump 201 are respectively communicated with two inlets of the inlet three-way valve 203, and the gas conveying fan 204 and the water pump 201 are also electrically connected with the PLC controller 103, when the double control switch 102 is closed, the water pump 201 and the gas conveying fan 204 are not opened, when one line of the double control switch 102 is powered, the PLC controller 103 controls the inlet three-way valve 203 to open the channel connected with the water pump 201, and opens the water pump 201, at this time the heat exchange mechanism 3 is in gas-liquid heat exchange mode, when the other line of the double control switch 102 is powered, the PLC controller 103 controls the inlet three-way valve 203 to open the channel connected with the gas conveying fan 204, closes the water pump 201, and opens the gas conveying fan 204, at this time the heat exchange mechanism 3 is in gas-gas heat exchange mode, and the PLC controller 103 also reduces the frequency of the variable frequency induced draft fan 4, so as to reduce the flow rate of the high temperature gas in the primary pipe network, increase the heat exchange time between the gases, and avoid the mismatch between the flow rate of the primary pipe network and the heat exchange mode.

[0032] As shown in Figure 1 and Figure 2 The switching mechanism 2 is connected with a heat exchange mechanism 3 for recovering waste heat, the heat exchange mechanism 3 includes a pipe passage inlet 301 connected with the other end of the inlet three-way valve 203, the other end of the pipe passage inlet 301 is connected with a heat exchanger body 302, the other end of the heat exchanger body 302 is connected with a pipe passage outlet 303, the top end of the heat exchanger body 302 is provided with a shell passage inlet 304, and the top end of the heat exchanger body 302 is also provided with a shell passage outlet 305, the heat exchange mechanism 3 is fixed with a variable frequency induced draft fan 4 for introducing high temperature gas, the pipe passage inlet 301 and the pipe passage outlet 303 are respectively connected with both ends of a cold fluid channel in the heat exchanger body 302, the cold fluid channel is made of metal materials such as aluminum alloy or copper alloy which have good corrosion resistance and heat conduction performance, when the heat exchanger body 302 exchanges heat, low temperature medium enters from the pipe passage inlet 301 and flows out from the pipe passage outlet 303, the shell passage inlet 304 and the shell passage outlet 305 are respectively connected with both ends of a hot fluid channel in the heat exchanger body 302, when the heat exchanger body 302 exchanges heat, high temperature medium enters from the shell passage inlet 304 and flows out from the shell passage outlet 305, when the high temperature medium passes through the hot fluid channel, heat is transferred to the low temperature medium in the cold fluid channel, so as to realize heat exchange, the variable frequency induced draft fan 4 is fixed with the shell passage inlet 304, when the variable frequency induced draft fan 4 changes the frequency, the flow rate of the high temperature medium in the hot fluid channel also changes.

[0033] As Figure 1 and Figure 4 shown, the heat exchange mechanism 3 is also fixed with an outlet three-way valve 5, the other end of the outlet three-way valve 5 is fixed with a dehumidification mechanism 6, the dehumidification mechanism 6 includes a shell 601 connected with the outlet three-way valve 5, the inner wall of one side of the shell 601 is fixed with a metal mesh cover 602, the outside of the metal mesh cover 602 is provided with a molecular sieve adsorption layer 603, the outside of the molecular sieve adsorption layer 603 is provided with a polypropylene filter cloth layer 604, the outlet three-way valve 5 is also an electronic three-way valve, and the outlet three-way valve 5 is electrically connected with the PLC controller 103, the two outlets of the outlet three-way valve 5 can be connected with the gas secondary heat network and the liquid secondary heat network respectively, when the device switches the mode, the PLC controller 103 also controls the outlet three-way valve 5 to open the channel of the corresponding medium, the dehumidification mechanism 6 is connected with the gas outlet end of the outlet three-way valve 5, the metal mesh cover 602 is cylindrical, when the hot gas flow passes through the dehumidification mechanism 6, the metal mesh cover 602, the molecular sieve adsorption layer 603 and the polypropylene filter cloth layer 604, the metal mesh cover 602 is made of stainless steel and has good corrosion resistance, the molecular sieve adsorption layer 603 can adsorb the water vapor in the gas flow, and the polypropylene filter cloth layer 604 can filter the water vapor in the gas flow, thereby further improving the dehumidification effect, so as to adsorb and filter the water vapor formed by the evaporation of residual moisture in the cold fluid channel, and the cylindrical metal mesh cover 602 increases the passing area of the gas, reduces the gas resistance and improves the filtering and dehumidification efficiency.

[0034] In use, the frequency conversion induced fan 4 is connected with the high-temperature heat source gas, the input ends of the water pump 201 and the gas conveying fan 204 are connected with the liquid secondary pipe network and the gas secondary pipe network respectively, when the high-temperature gas enters the shell side of the heat exchanger body 302 and the low-temperature medium enters the tube side of the heat exchanger body 302, the heat of the high-temperature gas is conducted into the low-temperature medium, thereby realizing waste heat recovery, through the switching mechanism 2, the recovery mode of the device can be changed, so that the device outputs hot water or hot gas, and the hot water and the hot gas can be used for the supply of domestic water, the heating of buildings or the heating in industrial production, and the dehumidification mechanism 6 can effectively remove the humidity in the gas low-temperature medium pipeline, thereby reducing the corrosion of the gas pipeline.

[0035] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process conversion obtained by using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A waste heat recovery multi-mode switching device comprising a support frame mechanism (1) and a switching mechanism (2), characterized in that: The support frame mechanism (1) is provided with a switching mechanism (2) for switching waste heat recovery mode, the switching mechanism (2) is connected with a heat exchange mechanism (3) for recovering waste heat; The heat exchange mechanism (3) is fixed with a variable frequency air blower (4) for introducing high temperature gas; The heat exchange mechanism (3) is also fixed with an outlet three-way valve (5), and the other end of the outlet three-way valve (5) is fixed with a dehumidification mechanism (6).

2. A waste heat recovery multi-mode switching device according to claim 1, characterized in that: The support frame mechanism (1) comprises a frame body (101), the frame body (101) is fixed with a double control switch (102), and the frame body (101) is also fixed with a PLC controller (103); the double control switch (102) is electrically connected with the PLC controller (103).

3. A waste heat recovery multi-mode switching device according to claim 2, wherein: The switching mechanism (2) comprises a water pump (201) fixed on the top of the frame body (101), the output end of the water pump (201) is fixed with a check valve (202), the other end of the check valve (202) is fixed with an inlet three-way valve (203), and the frame body (101) is also fixed with a gas conveying fan (204).

4. A waste heat recovery multi-mode switching device according to claim 3, wherein: The heat exchange mechanism (3) comprises a tube side inlet (301) connected with the other end of the inlet three-way valve (203), the other end of the tube side inlet (301) is connected with a heat exchanger body (302), and the other end of the heat exchanger body (302) is connected with a tube side outlet (303).

5. A waste heat recovery multi-mode switching device according to claim 4, wherein: The top end of the heat exchanger body (302) is provided with a shell side inlet (304), and the top end of the heat exchanger body (302) is also provided with a shell side outlet (305).

6. A waste heat recovery multi-mode switching device according to claim 1, wherein: The dehumidification mechanism (6) comprises a shell (601) connected with the outlet three-way valve (5), and the inner wall of one side of the shell (601) is fixed with a metal mesh cover (602).

7. A waste heat recovery multi-mode switching device according to claim 6, wherein: The outer portion of the metal mesh cover (602) is provided with a molecular sieve adsorption layer (603), and the outer portion of the molecular sieve adsorption layer (603) is provided with a polypropylene filter cloth layer (604).

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