Three-channel recovery heat exchanger for refrigerating and ice-making engine waste heat by using tail gas of vehicles and ships

Abstract

The invention relates to an engine waste heat three-channel recovery heat exchanger for refrigeration and ice making through vehicle and ship tail gas, and belongs to the technical field of waste heat recovery heat exchangers. A tail gas inlet pipe is arranged on the gas inlet hole, a middle partition plate is arranged on the inner side of the box body, the heat exchanger box body is divided into a preheating area and a heat exchange area by the middle partition plate, a cooling liquid flowing pipe of an S-shaped structure is arranged in the preheating area, and a refrigerating medium flowing pipe is arranged in the heat exchange area. The device has the beneficial effects that when the device is used, cooling liquid for cooling an engine of a vehicle or a ship is introduced from one end of the cooling liquid circulating pipe, vehicle and ship tail gas is introduced from the tail gas inlet pipe and is heated by the high-temperature cooling liquid, and the heated vehicle and ship tail gas enters the heat exchange area through the exhaust channel; the refrigerating and ice-making medium is introduced into the refrigerating medium circulating pipe to circulate, and the refrigerating and ice-making medium exchanges heat with high-temperature vehicle and ship tail gas, so that the heat exchange efficiency is improved through the three channels, and the heat recovery efficiency is improved.

Description

Technical Field

[0001] The invention relates to a three-channel recovery heat exchanger for utilizing engine waste heat for refrigeration and ice making of vehicle and ship exhaust gas, and belongs to the technical field of waste heat recovery heat exchangers. Background Art

[0002] In daily production and life, the exhaust gas of vehicles and ships is directly discharged into the air, which not only causes certain air pollution, but also wastes energy. Collecting the waste heat of vehicle and ship exhaust gas for refrigeration is a direction of industry development. In order to make good use of the waste heat in vehicle and ship exhaust gas, refrigeration and ice-making equipment for vehicle and ship exhaust waste heat has appeared in the industry. The above equipment uses the waste heat of exhaust gas as the driving source to achieve refrigeration through ammonia absorption refrigeration. Through the heat-to-cold conversion of the ammonia absorption refrigeration unit, the heat of the exhaust gas is effectively reused, which greatly saves energy consumption and significantly increases economic and social benefits.

[0003] In the refrigeration and ice-making equipment of the waste heat of vehicle and ship exhaust, the heat exchanger is an important component. The heat exchanger is generally provided with multiple channels, which can be used for liquid-liquid and liquid-gas heat exchange. The existing heat exchanger has the following problems in use: the existing heat exchanger adopts two-channel cross flow, one channel is connected to the cooling medium, and the other channel is connected to the vehicle and ship exhaust. In actual use, the exhaust temperature discharged by the vehicle and ship when it is in an idling state is lower than the exhaust temperature when the vehicle and ship are running at full speed, resulting in poor effect when the subsequent heat exchange using the vehicle and ship exhaust is used. At the same time, when the vehicle and ship engine is working, the engine temperature is high and the engine coolant is required for cooling. The coolant has a relatively high temperature due to the absorption of the heat of the engine. If the high-temperature engine coolant and the vehicle and ship exhaust and the refrigeration and ice-making medium are converted to each other, the efficiency of energy utilization and the efficiency of heat recovery can be improved. However, the dual-channel heat exchanger in the industry cannot achieve the above purpose. In view of the above problems, the industry needs a three-channel waste heat recovery heat exchanger to solve the problems faced by the industry. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a three-channel recovery heat exchanger for vehicle and ship exhaust refrigeration and ice making using engine waste heat to solve the problems faced in the industry.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: a three-channel recovery heat exchanger for vehicle and ship exhaust refrigeration and ice making using engine waste heat, the heat exchanger comprising a heat exchanger box, an air inlet hole is arranged on the left side of the heat exchanger box, an exhaust gas inlet pipe is arranged on the air inlet hole, an intermediate partition is arranged on the inner side of the box, the intermediate partition divides the heat exchanger box into a preheating zone and a heat exchange zone, a coolant flow pipe with an S-shaped structure is arranged in the preheating zone, an air vent is arranged on the intermediate partition, a gas flow pipe is arranged in the air vent, a shut-off one-way valve is arranged on the gas flow pipe, a refrigerant medium flow pipe is arranged in the heat exchange zone, a plurality of exhaust holes are arranged on the right side of the heat exchanger box, and exhaust channels are arranged between the exhaust holes.

[0006] Preferably, both ends of the coolant circulation pipe extend into the outside of the heat exchanger casing respectively.

[0007] Preferably, the exhaust passage comprises a plurality of branch pipes, the branch pipes are inserted into the exhaust holes, and an exhaust main pipe is arranged between the branch pipes.

[0008] Preferably, a plurality of temperature sensors are respectively provided in the preheating zone and the heat exchange zone.

[0009] Preferably, a temperature sensor is provided in the exhaust gas intake pipe.

[0010] Compared with the prior art, the advantages of the present invention are as follows: when in use, the coolant used for cooling the vehicle and ship engine is introduced from one end of the coolant circulation pipe and flows out from the other end, the vehicle and ship exhaust gas is introduced from the exhaust gas intake pipe, the vehicle and ship exhaust gas enters the preheating zone, and is heated by the high-temperature coolant, thereby increasing the temperature of the vehicle and ship exhaust gas and reducing the engine coolant temperature, the heated vehicle and ship exhaust gas enters the heat exchange zone through the exhaust channel, the medium used for refrigeration and ice making is introduced into the refrigeration medium circulation pipe for circulation, the refrigeration and ice making medium and the high-temperature vehicle and ship exhaust gas are heat exchanged, thereby achieving an improvement in heat exchange efficiency through the above three channels and improving the heat recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings.

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure: 1. heat exchanger box; 101. air inlet; 102. exhaust gas inlet pipe; 103. exhaust hole; 2. middle partition; 201. air vent; 202. gas circulation pipe; 203. stop one-way valve; 3. preheating area; 4. heat exchange area; 401. refrigerant medium circulation pipe; 5. coolant circulation pipe; 6. exhaust channel; 601. branch pipe; 602. exhaust main pipe; 7. temperature sensor; 8. control display screen. DETAILED DESCRIPTION

[0014] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments: like Figure 1 The heat exchanger shown is a three-channel recovery heat exchanger for vehicle and ship exhaust refrigeration and ice making using engine waste heat. The heat exchanger includes a heat exchanger box 1, and a middle partition 2 is arranged on the inner side of the heat exchanger box 1. The middle partition 2 divides the heat exchanger box 1 into a preheating area 3 and a heat exchange area 4. An air inlet 101 is arranged on the left side of the heat exchanger box 1, and an exhaust gas inlet pipe 102 is arranged on the air inlet 101. A coolant flow pipe 5 with an S-shaped structure is arranged in the preheating area 3. An air vent 201 is arranged on the middle partition 2, and a gas flow pipe 202 is arranged in the air vent 201. A shut-off one-way valve 203 is arranged on the gas flow pipe 202. A refrigerant flow pipe 401 is arranged in the heat exchange area 4. A plurality of exhaust holes 103 are arranged on the right side of the heat exchanger box 1, and exhaust channels 6 are arranged between the exhaust holes 103.

[0015] In order to facilitate the introduction of the coolant, further, both ends of the coolant circulation pipe 5 extend to the outside of the heat exchanger box 1 respectively.

[0016] In order to achieve the purpose of exhaust, the exhaust channel 6 further includes a plurality of branch pipes 601 , the branch pipes 601 are inserted into the exhaust holes 103 , and an exhaust main pipe 602 is arranged between the branch pipes 601 .

[0017] In order to accurately detect the temperature, further, a plurality of temperature sensors 7 are respectively provided in the preheating zone 3 and the heat exchange zone 4 .

[0018] In order to accurately measure the exhaust gas intake temperature, a temperature sensor 7 is further provided in the exhaust gas intake pipe 102 .

[0019] In order to control the flow of each substance, the heat exchanger housing 1 is further provided with a control display screen 8 .

[0020] When in use, the coolant of the vehicle and ship engine is introduced from one end of the coolant circulation pipe 5 and flows out from the other end. The above coolant is used to cool the vehicle and ship engine, so the temperature of the above coolant is relatively high. The exhaust gas generated by the vehicle and ship is introduced into the exhaust gas intake pipe 102, and the exhaust gas enters the preheating zone 3 from the exhaust gas intake pipe 102. The exhaust gas is heated by the high-temperature coolant to increase the temperature of the exhaust gas, thereby improving the efficiency of subsequent heat exchange.

[0021] After the exhaust gas is heated by the high-temperature coolant, the stop one-way valve 203 is opened. At this time, the exhaust gas after the residual heat enters the heat exchange zone 4 through the gas circulation pipe 202, and the refrigeration and ice-making medium to be exchanged is introduced from one end of the refrigeration medium circulation pipe 401 and flows out from the other end. At this time, the high-temperature exhaust gas located in the heat exchange zone 4 and the refrigeration and ice-making medium located in the refrigeration medium circulation pipe 401 perform heat exchange to achieve the purpose of heat exchange.

[0022] In this patent, a plurality of temperature sensors 7 are provided, and the temperature sensors 7 transmit the detected temperature data to the control display screen 8. The control display screen 8 adjusts the flow rate of the vehicle or ship engine coolant, the medium used for refrigeration and ice making, and the exhaust gas according to the detected temperature value to achieve a better heat exchange effect.

[0023] In this patent, three channels are set up. The coolant circulation pipe 5 is used to introduce the coolant of the vehicle and ship engine. The refrigerant medium circulation pipe 401 introduces the medium used for refrigeration and ice making. The above-mentioned medium can be ammonia water. The exhaust gas intake pipe 102 in the heat exchanger box 1 introduces the exhaust gas generated by the vehicle and ship, passes through the above-mentioned three channels, and introduces corresponding substances into the three channels to improve the efficiency and effect of heat exchange.

[0024] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A three-channel heat exchanger for refrigerating and making ice from vehicle and ship exhaust using engine waste heat, characterized in that: The heat exchanger comprises a heat exchanger housing (1), wherein a middle partition (2) is arranged on the inner side of the heat exchanger housing (1), wherein the middle partition (2) divides the heat exchanger housing (1) into a preheating zone (3) and a heat exchange zone (4), wherein an air inlet (101) is arranged on the left side of the heat exchanger housing (1), wherein an exhaust gas inlet pipe (102) is arranged on the air inlet (101), wherein a coolant flow pipe (5) with an S-shaped structure is arranged in the preheating zone (3), wherein a vent hole (201) is arranged on the middle partition (2), wherein a gas flow pipe (202) is arranged in the vent hole (201), wherein a stop check valve (203) is arranged on the gas flow pipe (202), wherein a refrigerant flow pipe (401) is arranged in the heat exchange zone (4), wherein a plurality of exhaust holes (103) are arranged on the right side of the heat exchanger housing (1), wherein exhaust channels (6) are arranged between the exhaust holes (103).

2. The three-channel heat recovery heat exchanger for refrigerating and making ice using exhaust gas from vehicles and ships according to claim 1 is characterized in that: Both ends of the cooling liquid circulation pipe (5) extend into the outside of the heat exchanger box (1) respectively.

3. The three-channel heat recovery heat exchanger for refrigerating and making ice using exhaust gas from vehicles and ships according to claim 1 is characterized in that: The exhaust channel (6) comprises a plurality of branch pipes (601), the branch pipes (601) being inserted into the exhaust holes (103), and an exhaust main pipe (602) being arranged between the branch pipes (601).

4. The three-channel heat recovery exchanger for refrigerating and making ice using engine waste heat for vehicle and vessel exhaust gas according to claim 1 is characterized in that: A plurality of temperature sensors (7) are respectively arranged in the preheating zone (3) and the heat exchange zone (4).

5. The three-channel heat recovery exchanger for refrigerating and making ice using exhaust gas from vehicles and ships according to claim 1 is characterized in that: A temperature sensor (7) is provided in the exhaust gas intake pipe (102).

6. The three-channel heat recovery exchanger for refrigerating and making ice using exhaust gas from vehicles and ships according to claim 1 is characterized in that: The heat exchanger housing (1) is also provided with a control display screen (8).

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