Combined module integrating flue gas heat exchange and evaporation

Abstract

The utility model relates to a combined module integrating flue gas heat exchange and evaporation. According to the technical scheme, a combined module shell is placed in the horizontal direction, a smoke heat exchange module is arranged on the upper portion, and an evaporator module is arranged on the lower portion; an upper smoke inlet is formed in the upper side of the smoke heat exchange module, a water heat exchange coil pipe is installed in the smoke heat exchange module, one or more sets of refrigerant heat exchange coil pipes are arranged in the evaporator module, and the outer ends of one set of refrigerant heat exchange coil pipes are communicated with a first evaporator refrigerant inlet and outlet pipe. The outer end of the other group of refrigerant heat exchange coil pipes is communicated to a second evaporator refrigerant inlet and outlet pipe; and the lower side of the evaporator module is provided with a flue gas lower exhaust port. The heat exchanger has the beneficial effects that the phenomenon of flue gas temperature layering in the prior art is avoided, the water heat exchange coil pipe and the refrigerant heat exchange coil pipe are more uniformly contacted with high-temperature flue gas, the heat exchange efficiency is improved, and the problem of poor heat exchange of the evaporator on the lower side caused by condensed water flowing when the evaporator is vertically arranged is also avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler flue gas waste heat utilization device, especially relates to a combined module integrating flue gas heat exchange and evaporation. BACKGROUND

[0002] At present, with the increasingly strict environmental protection requirements, some small gas boilers are used to centrally heat several remote communities, and the flue gas exhaust temperature of the small gas boiler is generally 120-180 degrees, which results in the waste of heat energy. The prior art has mentioned flue gas heat exchange to realize the recovery of flue gas heat, but generally, high-temperature flue gas is simply discharged into a water heater to exchange part of the heat to the water heater, however, the water in the water heater cannot reach the temperature for direct application. Therefore, auxiliary heating is required, such as electric heating, which still has high energy consumption and cannot be effectively promoted. As a recognized high-efficiency energy-saving device that can fully utilize low-grade heat, the evaporator used in the heat pump technology is generally vertically installed to reduce the floor area, but it has the following problems: on the one hand, when the high-temperature flue gas passes through the evaporator horizontally, the heat is stratified, that is, the temperature of the flue gas on the upper side is higher than that on the lower side, which affects the heat exchange efficiency; on the other hand, when the evaporator is vertically installed, the condensate formed on the surface of the evaporator will drip downward, which affects the heat exchange efficiency of the fins on the lower side of the evaporator. SUMMARY

[0003] The utility model discloses a combined module integrating flue gas heat exchange and evaporation, which is installed and fixed in the horizontal direction, and a flue gas heat exchange module is installed above the evaporator. The high-temperature flue gas is first exchanged with the heating return water to realize the first waste heat utilization of the flue gas, and then the flue gas is exchanged with the refrigerant by passing through the evaporator downward to realize the second waste heat utilization of the flue gas, thereby improving the heat exchange efficiency of the flue gas and avoiding the problems mentioned in the prior art.

[0004] The utility model discloses a kind of combined module of flue gas heat exchange and evaporation in one, its technical scheme is: including combined module shell (3), first evaporator refrigerant inlet and outlet pipe (4), second evaporator refrigerant inlet and outlet pipe (5), outlet water communication pipe (7), water inlet communication pipe (8), the combined module shell (3) is placed horizontally, and upper part is flue gas heat exchange module, lower part is evaporator module;The upside of the flue gas heat exchange module is equipped with flue gas upper inlet (3.3), water heat exchange coil (3.6) is installed inside flue gas heat exchange module, the outside of flue gas heat exchange module is equipped with outlet water communication pipe (7) and water inlet communication pipe (8), one end of water heat exchange coil (3.6) is communicated to outlet water communication pipe (7), and other end is communicated to water inlet communication pipe (8);The evaporator module is equipped with more than one group of refrigerant heat exchange coil (3.5), the outer end of one group of refrigerant heat exchange coil (3.5) is communicated to first evaporator refrigerant inlet and outlet pipe (4), and the outer end of another group of refrigerant heat exchange coil (3.5) is communicated to second evaporator refrigerant inlet and outlet pipe (5), the downside of the evaporator module is flue gas lower exhaust (3.4).

[0005] Preferably, the outer end of the outlet water communication pipe (7) is connected to the outlet water connector (2), and the outer end of the water inlet communication pipe (8) is connected to the water inlet connector (1).

[0006] Preferably, the lower side of the water inlet connector (1) is provided with an exhaust valve (1.1), and the outer end of the water inlet connector (1) is provided with a water inlet connector flange (1.2).

[0007] Preferably, the upper side of the outlet water connector (2) is provided with a water outlet plug (2.1), and the outer end of the outlet water connector (2) is provided with an outlet water connector flange (2.2).

[0008] Preferably, the upper end of the combined module shell (3) is a square structure flue gas upper inlet (3.3), and a plurality of flue gas connection screw holes (3.1) are distributed around the flue gas upper inlet (3.3), and a chimney inlet pipe (6) is connected through the flue gas connection screw holes (3.1).

[0009] Preferably, the lower end of the combined module shell (3) is a square structure flue gas lower exhaust (3.4), and the lower end of the flue gas lower exhaust (3.4) is connected to a chimney exhaust pipe (9).

[0010] Preferably, the water heat exchange coil (3.6) is composed of a plurality of U-shaped heat exchange pipes (3.6.1), one end of each U-shaped heat exchange pipe (3.6.1) is inserted into one side of the combined module shell (3), the other end is welded to the outlet water communication pipe (7), and the other end is welded to the water inlet communication pipe (8).

[0011] Preferably, the upper side of the flue gas upper inlet (3.3) is provided with a net structure distributor (3.2).

[0012] Preferably, the water heat exchange coil (3.6) is vertically staggered with the refrigerant heat exchange coil (3.5), and the water heat exchange coil (3.6) is above the refrigerant heat exchange coil (3.5).

[0013] The beneficial effects of the utility model are: high-temperature flue gas enters the flue gas heat exchange module in the combined module shell cavity, first contacts the flue gas heat exchange module of upper part, passes through multiple water heat exchange coils, backwater enters the water heat exchange coil and high-temperature flue gas through the water inlet communication pipe and exchanges heat, realizes the first temperature rise of backwater, also realizes the first waste heat utilization of flue gas; high-temperature flue gas continues to pass through the evaporator module downwards, and the refrigerant passing through the condenser of heat pump unit enters the refrigerant heat exchange coil through more than one evaporator refrigerant inlet and outlet pipe, is heated and temperature is raised by high-temperature flue gas, realizes the second waste heat utilization of flue gas, effectively reduces the temperature of flue gas, and fully utilizes the heat of flue gas; in addition, the combined module shell is horizontally placed, avoids the phenomenon of flue gas temperature stratification in the prior art, makes the water heat exchange coil and the refrigerant heat exchange coil more evenly contact with high-temperature flue gas, improves the heat exchange efficiency, also avoids the problem of poor heat exchange of the evaporator on the lower side caused by the flow of condensate water in the vertically placed evaporator, and improves the heat exchange efficiency of the evaporator. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the top direction of the utility model;

[0015] Figure 2 It is the structure schematic diagram of the front direction of the utility model;

[0016] Figure 3 It is the structure schematic diagram of the back direction of the utility model;

[0017] Figure 4 It is the structure schematic diagram of the right direction of the utility model;

[0018] Figure 5 It is the structure schematic diagram of the top direction of the embodiment 2 of the utility model;

[0019] Figure 6 It is the structure schematic diagram when the utility model is used;

[0020] In the above figure: water inlet joint 1, water outlet joint 2, combined module body 3, first evaporator refrigerant inlet and outlet pipe 4, second evaporator refrigerant inlet and outlet pipe 5, chimney inlet pipe 6, water outlet communication pipe 7, water inlet communication pipe 8, chimney exhaust pipe 9, exhaust valve 1.1, water inlet joint flange 1.2, water outlet plug 2.1, water outlet joint flange 2.2, flue gas connecting screw hole 3.1, distributor 3.2, flue gas upper inlet 3.3, flue gas lower outlet 3.4, refrigerant heat exchange coil 3.5, water heat exchange coil 3.6, heat exchange pipe 3.6.1. DETAILED DESCRIPTION

[0021] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0022] Embodiment 1, refer to Figures 1-3 The utility model discloses a kind of combined module of flue gas heat exchange and evaporation, including combined module shell 3, first evaporator refrigerant inlet and outlet pipe 4, second evaporator refrigerant inlet and outlet pipe 5, water outlet communication pipe 7, water inlet communication pipe 8, the combined module shell 3 is placed horizontally, and upper part is flue gas heat exchange module, lower part is evaporator module;The upper side of the flue gas heat exchange module is equipped with flue gas upper inlet 3.3, water heat exchange coil 3.6 is installed inside flue gas heat exchange module, the outer side of flue gas heat exchange module is equipped with water outlet communication pipe 7 and water inlet communication pipe 8, one end of water heat exchange coil 3.6 is communicated to water outlet communication pipe 7, the other end is communicated to water inlet communication pipe 8;Evaporator module is equipped with more than one group of refrigerant heat exchange coil 3.5, the outer end of a group of refrigerant heat exchange coil 3.5 is communicated to first evaporator refrigerant inlet and outlet pipe 4, the outer end of another group of refrigerant heat exchange coil 3.5 is communicated to second evaporator refrigerant inlet and outlet pipe 5, the lower side of evaporator module is flue gas lower outlet 3.4.

[0023] Refer to Figure 3 The outer end of water outlet communication pipe 7 of the utility model is connected with water outlet joint 2, the outer end of water inlet communication pipe 8 is connected with water inlet joint 1, the lower side of above-mentioned water inlet joint 1 is equipped with exhaust valve 1.1, and the outer end of water inlet joint 1 is equipped with water inlet joint flange 1.2;The upper side of above-mentioned water outlet joint 2 is equipped with water outlet plug 2.1, and the outer end of water outlet joint 2 is equipped with water outlet joint flange 2.2.

[0024] Refer to Figure 6 The upper end of the combined module shell 3 of the utility model is square structure flue gas upper inlet 3.3, and multiple groups of flue gas connecting screw hole 3.1 are distributed around flue gas upper inlet 3.3, and chimney inlet pipe 6 is connected by flue gas connecting screw hole 3.1;The lower end of above-mentioned combined module shell 3 is square structure flue gas lower outlet 3.4, and the lower end of flue gas lower outlet 3.4 is connected with chimney exhaust pipe 9.

[0025] Referring to Figure 3 The water heat exchange coil 3.6 is composed of multiple groups of U-shaped heat exchange pipes 3.6.1, one end of each group of U-shaped heat exchange pipes 3.6.1 is inserted into one side of the combined module shell 3, one outlet on the other side is welded to the water outlet communication pipe 7, and the other inlet is welded to the water inlet communication pipe 8.

[0026] In use, the chimney inlet pipe 6 is connected to the flue gas connecting screw hole 3.1, the lower end of the flue gas lower outlet 3.4 is connected to the chimney exhaust pipe 9, then the high-temperature flue gas of the small gas boiler enters the flue gas heat exchange module in the inner cavity of the combined module shell 3 through the chimney inlet pipe 6, first contacts the flue gas heat exchange module on the upper part, passes through multiple groups of water heat exchange coils 3.6, the return water of the small gas boiler is connected to the water inlet communication pipe 8 through the water inlet joint 1, then enters the water heat exchange coil 3.6 to exchange heat with the high-temperature flue gas, realizes the first temperature rise of the return water, realizes the first waste heat utilization of the flue gas, and flows out through the water outlet communication pipe 7; the high-temperature flue gas continues to pass through the evaporator module, the refrigerant passing through the condenser of the heat pump set enters the refrigerant heat exchange coil 3.5 through one group or more evaporator refrigerant inlet and outlet pipes, is heated and raised in temperature by the high-temperature flue gas, realizes the second waste heat utilization of the high-temperature flue gas, effectively reduces the temperature of the flue gas, and fully utilizes the heat of the flue gas; in addition, the combined module shell 3 is placed in the horizontal direction, the phenomenon of stratification of the flue gas temperature in the prior art is avoided, the water heat exchange coil 3.6 and the refrigerant heat exchange coil 3.5 are more uniformly contacted with the high-temperature flue gas, the heat exchange efficiency is improved, the problem that the condensate water flow causes the heat exchange of the evaporator on the lower side to be poor in the case of vertically placing the evaporator is avoided, and the heat exchange efficiency of the evaporator is improved.

[0027] In the embodiment 2, the combined module is mentioned in the utility model, which comprises a combined module shell 3, a first evaporator refrigerant inlet and outlet pipe 4, a second evaporator refrigerant inlet and outlet pipe 5, a water outlet communication pipe 7, and a water inlet communication pipe 8, the combined module shell 3 is placed in the horizontal direction, the upper part is a flue gas heat exchange module, and the lower part is an evaporator module; the upper side of the flue gas heat exchange module is provided with a flue gas upper inlet 3.3, a water heat exchange coil 3.6 is arranged in the flue gas heat exchange module, the outer side of the flue gas heat exchange module is provided with the water outlet communication pipe 7 and the water inlet communication pipe 8, one end of the water heat exchange coil 3.6 is communicated to the water outlet communication pipe 7, and the other end is communicated to the water inlet communication pipe 8; the evaporator module is provided with one group or more refrigerant heat exchange coils 3.5, the outer end of one group of refrigerant heat exchange coils 3.5 is communicated to the first evaporator refrigerant inlet and outlet pipe 4, the outer end of the other group of refrigerant heat exchange coils 3.5 is communicated to the second evaporator refrigerant inlet and outlet pipe 5, and the lower side of the evaporator module is a flue gas lower outlet 3.4.

[0028] The difference between the embodiment 1 and the embodiment 2 is that:

[0029] In this embodiment, a mesh-structured distributor 3.2 is installed on the upper side of the flue gas inlet 3.3, which facilitates the flue gas to enter the inner cavity of the flue gas heat exchange module more evenly and improves the heat exchange efficiency.

[0030] Example 3: A combined module integrating flue gas heat exchange and evaporation, as mentioned in this utility model, includes a combined module shell 3, a first evaporator refrigerant inlet / outlet pipe 4, a second evaporator refrigerant inlet / outlet pipe 5, a water outlet connecting pipe 7, and a water inlet connecting pipe 8. The combined module shell 3 is placed horizontally, with the upper part being the flue gas heat exchange module and the lower part being the evaporator module. The upper side of the flue gas heat exchange module is provided with a flue gas upper inlet 3.3, and a water heat exchange coil 3.6 is installed inside the flue gas heat exchange module. The flue gas heat exchange module is provided with an outlet water connecting pipe 7 and an inlet water connecting pipe 8 on its outer side. One end of the water heat exchange coil 3.6 is connected to the outlet water connecting pipe 7, and the other end is connected to the inlet water connecting pipe 8. The evaporator module is provided with one or more sets of refrigerant heat exchange coils 3.5. The outer end of one set of refrigerant heat exchange coils 3.5 is connected to the first evaporator refrigerant inlet / outlet pipe 4, and the outer end of another set of refrigerant heat exchange coils 3.5 is connected to the second evaporator refrigerant inlet / outlet pipe 5. The lower side of the evaporator module is the flue gas lower exhaust port 3.4.

[0031] The difference from Example 1 or 2 is:

[0032] In this embodiment, the water heat exchange coil 3.6 and the refrigerant heat exchange coil 3.5 are arranged in a vertically interlaced structure, with the water heat exchange coil 3.6 located above the refrigerant heat exchange coil 3.5. This structure allows for better manufacturing, better utilization of flue gas, and improved heat exchange efficiency.

[0033] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A combined module integrating flue gas heat exchange and evaporation, characterized in that: The combination module shell (3), the first evaporator refrigerant inlet and outlet pipe (4), the second evaporator refrigerant inlet and outlet pipe (5), the water outlet communication pipe (7), and the water inlet communication pipe (8) are included.

2. The combined module of smoke gas heat exchange and evaporation according to claim 1, characterized in that: The outer end of the water outlet communication pipe (7) is connected to the water outlet joint (2), and the outer end of the water inlet communication pipe (8) is connected to the water inlet joint (1).

3. The combined module of smoke gas heat exchange and evaporation according to claim 2, characterized in that: The lower side of the water inlet joint (1) is provided with an exhaust valve (1.1), and the outer end of the water inlet joint (1) is provided with a water inlet joint flange (1.2).

4. The combined module of smoke gas heat exchange and evaporation according to claim 3, characterized in that: The upper side of the water outlet joint (2) is provided with a water outlet plug (2.1), and the outer end of the water outlet joint (2) is provided with a water outlet joint flange (2.2).

5. The combined module of smoke gas heat exchange and evaporation according to claim 4, characterized in that: The upper end of the combination module shell (3) is a square structure of the flue gas inlet (3.3), and a plurality of flue gas connection screw holes (3.1) are distributed around the flue gas inlet (3.3).

6. The combined module of smoke gas heat exchange and evaporation according to claim 5, characterized in that: The lower end of the combination module shell (3) is a square structure of the flue gas outlet (3.4), and the lower end of the flue gas outlet (3.4) is connected to the chimney exhaust pipe (9).

7. The combined module of smoke gas heat exchange and evaporation according to claim 1, characterized in that: The water heat exchange coil (3.6) is composed of a plurality of U-shaped heat exchange pipes (3.6.1). The upper side of the flue gas inlet (3.3) is provided with a net-shaped distributor (3.2).

8. The combined module of integrating fume heat exchange and evaporation according to claim 1 or 6, characterized in that: The water heat exchange coil (3.6) and the refrigerant heat exchange coil (3.5) are vertically staggered structures, and the water heat exchange coil (3.6) is located above the refrigerant heat exchange coil (3.5).

9. The combined module of smoke gas heat exchange and evaporation according to claim 8, characterized in that: ​

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