A heat pump cogeneration application device for alcohol production

Abstract

The utility model discloses a kind of heat pump cold and heat cogeneration application devices for alcohol production, including liquid storage tank, heating mechanism and hierarchical cooling mechanism, heating mechanism includes at least one for distilling alcohol solution's distiller and primary heat pump, liquid storage tank is connected with distiller, liquid storage tank is connected with the hierarchical cooling mechanism between by preestablished primary condenser pipe connection, primary heat pump is used to supply distilled hot water to distiller, distiller is connected with primary heat pump, hierarchical cooling mechanism includes primary condenser, primary cooling tower, secondary heat pump, secondary condenser, tertiary heat pump and refrigerator, wherein, secondary heat pump is used to recover the condensing heat of primary condenser, tertiary heat pump is used to recover the heat of secondary condenser;Second condenser top and bottom are respectively equipped with secondary condenser pipe and output pipe, the utility model recycles heat in distillation and condensation process by relevant heat pump and reuses, with the characteristics of low cost, great applicability.

Description

Technical Field

[0001] This utility model relates to the technical field of petrochemical equipment, and in particular to a heat pump cogeneration application device for alcohol production. Background Technology

[0002] Alcohol, as a basic raw material, is widely used in the chemical industry. It can be used to produce various chemical products such as formic acid, formaldehyde, acetic acid, methylamine, and dimethyl ether. With the rapid development of alcohol derivatives and downstream products, the demand for alcohol is increasing. Therefore, the chemical industry has an urgent need to improve the quality of alcohol products and the efficiency of alcohol production. Alcohol distillation and cooling recovery equipment is a crucial step in alcohol production. Traditional alcohol distillation and cooling recovery equipment suffers from low production efficiency and high production costs. Therefore, based on the above-mentioned technical problems, this application proposes a low-cost, highly applicable heat pump cogeneration application device for alcohol production. This device recovers the heat generated during the condensation of high-temperature alcohol vapor and utilizes the heat from the heated condensate to prepare high-temperature hot water, providing a heat source for the still to distill the alcohol solution. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a low-cost, widely applicable heat pump cogeneration application device for alcohol production.

[0004] To achieve the above objectives, this utility model provides a heat pump cogeneration application device for alcohol production, comprising a storage tank for storing the alcohol solution to be distilled, a heating mechanism, and a staged cooling mechanism. The heating mechanism includes at least one still for distilling the alcohol solution. The water outlet of the storage tank is connected to the water inlet of the still via a pre-set feed pipe. The gas inlet of the storage tank is connected to the water outlet of the still via a pre-set gas delivery pipe. The storage tank is connected to the staged cooling mechanism via a pre-set primary condenser pipe. The heating mechanism also includes a primary heat pump. The primary heat pump supplies hot water for distillation to the still. The inlet of the still and the outlet of the primary heat pump are connected via a pre-installed heating pipe, and the outlet of the still and the inlet of the primary heat pump are connected via a pre-installed primary return pipe. The staged cooling mechanism includes a primary condenser, a primary cooling tower, a secondary heat pump, a secondary condenser, a tertiary heat pump, and a chiller. The secondary heat pump recovers the condensation heat from the primary condenser, and the tertiary heat pump recovers the heat from the secondary condenser. The outlet of the primary condenser and the inlet of the primary cooling tower are connected via a pre-installed primary return pipe. A primary water supply pipe is provided between the water inlet and outlet of the primary condenser. A secondary return pipe is provided between the inlet of the primary condenser and the outlet of the primary cooling tower. A secondary water supply pipe is bypassed from the primary water supply pipe, and a tertiary return pipe is bypassed from the secondary return pipe. The secondary water supply pipe connects the inlet of the primary condenser to the outlet of the secondary heat pump, and the tertiary return pipe connects the outlet of the primary condenser to the inlet of the secondary heat pump. A secondary condensing pipe and an output pipe are respectively provided at the top and bottom of the secondary condenser. The secondary condensing pipe is used to input a portion of the uncondensed water from the primary condenser. Alcohol vapor is emitted from the outlet pipe, which is used to output the purified alcohol solution. The inlet of the secondary condenser is connected to the outlet of the chiller via a pre-set tertiary water supply pipe, and the outlet of the secondary condenser is connected to the inlet of the chiller via a pre-set quaternary reflux pipe. A quaternary water supply pipe is bypassed from the tertiary water supply pipe, and a quinary reflux pipe is bypassed from the quaternary reflux pipe. The inlet of the secondary condenser is connected to the outlet of the tertiary heat pump via the quaternary water supply pipe, and the outlet of the secondary condenser is connected to the inlet of the tertiary heat pump via the quinary reflux pipe.

[0005] Furthermore, the feeding pipe is equipped with a primary solenoid valve for on / off control, and a drain pipe is bypassed from the feeding pipe. The drain pipe is equipped with a sixth-stage solenoid valve for on / off control. The primary water supply pipe is equipped with a secondary water pump and a secondary solenoid valve for on / off control. The secondary return pipe is equipped with a tertiary solenoid valve for on / off control. The tertiary water supply pipe is equipped with a fourth-stage solenoid valve and a sixth-stage water pump for on / off control. The fourth-stage return pipe is equipped with a fourth-stage water pump and a fifth-stage solenoid valve for on / off control.

[0006] Furthermore, a temperature sensor for detecting temperature is provided on the top of the liquid storage tank, and an air outlet is provided on the top of the liquid storage tank, which is connected to the first-stage condenser tube; a water outlet is provided at the bottom of the liquid storage tank, which is connected to the feed pipe.

[0007] Furthermore, the storage tank is equipped with an inlet pipe for feeding the alcohol solution to be processed into the storage tank.

[0008] Furthermore, it also includes a primary buffer water tank, wherein the primary buffer water tank is located between the distiller and the primary heat pump; a primary water pump is provided on the primary reflux pipe between the primary buffer water tank and the distiller.

[0009] Furthermore, it also includes a secondary buffer water tank, wherein the secondary buffer water tank is located between the primary condenser and the secondary heat pump; the primary water supply pipe and the secondary return pipe are respectively equipped with a seven-stage solenoid valve and an eight-stage solenoid valve for controlling the on / off state, and the tertiary return pipe is equipped with a five-stage water pump.

[0010] Furthermore, it also includes a three-stage buffer tank, wherein the three-stage buffer tank is located between the two-stage condenser and the refrigerator.

[0011] Furthermore, the graded cooling mechanism also includes a two-stage cooling tower. The inlet of the two-stage cooling tower is connected to the outlet of the chiller through a pre-set five-stage water supply pipe, and the outlet of the two-stage cooling tower is connected to the inlet of the chiller through a pre-set six-stage return pipe. The six-stage return pipe is also equipped with a three-stage water pump.

[0012] Furthermore, the tiered cooling mechanism also includes a hot water storage tank. The inlet of the hot water storage tank is connected to the outlet of the primary heat pump via a pre-set primary recovery pipe. The outlet of the hot water storage tank is connected to the inlet of the primary heat pump via a pre-set primary input pipe. The primary input pipe is equipped with an eight-stage water pump.

[0013] Furthermore, the inlet of the hot water storage tank is connected to the outlet of the secondary heat pump via a pre-set secondary recovery pipe and a secondary input pipe, and the outlet of the hot water storage tank is connected to the inlet of the secondary heat pump via a pre-set secondary input pipe, wherein the secondary input pipe is equipped with a nine-stage water pump; the inlet of the hot water storage tank is connected to the outlet of the tertiary heat pump via a pre-set tertiary recovery pipe, and the outlet of the hot water storage tank is connected to the inlet of the tertiary heat pump via a pre-set tertiary input pipe, wherein the tertiary input pipe is also equipped with a ten-stage water pump.

[0014] The present invention adopts the above-described solution, and its beneficial effects are as follows: Low cost: By adding a primary heat pump, a secondary heat pump, and a third heat pump, the heat generated during alcohol distillation and cooling is recovered and utilized, improving and optimizing the heating method of alcohol, thereby achieving the goal of reducing production costs. Wide applicability: Unlike traditional equipment for distilling alcohol, it does not require separate equipment for primary distillation and rectification. Primary distillation and rectification of alcohol can be carried out on the same equipment by adjusting relevant parameters, making it more suitable for actual production and with a wider range of applications. Attached Figure Description

[0015] Figure 1 A schematic diagram of an apparatus for alcohol distillation and cooling recovery.

[0016] Among them, 1-liquid storage tank, 11-gas outlet, 12-water outlet, 13-feed pipe, 14-feeding pipe, 141-first-stage solenoid valve, 15-drain pipe, 151-sixth-stage solenoid valve, 16-temperature sensor, 2-heating mechanism, 21-dissolver, 22-first-stage heat pump, 23-first-stage buffer tank, 24-heating pipe, 25-first-stage reflux pipe, 251-first-stage water pump, 26-gas transmission pipe, 3-first-stage condenser pipe. 4-Stage cooling mechanism, 41-Stage condenser, 411-Stage water supply pipe, 4111-Stage water pump, 4112-Stage solenoid valve, 412-Stage return pipe, 4121-Stage solenoid valve, 4122-Stage water pump, 42-Stage cooling tower, 43-Stage heat pump, 431-Stage water supply pipe, 4311-Stage 8 solenoid valve, 432-Stage 3 return pipe, 4321-Stage 7 solenoid valve, 4322 - Five-stage water pump, 44- Secondary buffer tank, 45- Secondary condenser, 451- Secondary condenser coil, 452- Output pipe, 46- Refrigeration unit, 461- Tertiary water supply pipe, 4611- Quaternary solenoid valve, 4612- Sixth-stage water pump, 462- Quaternary return pipe, 4621- Fifth-stage solenoid valve, 4622- Quaternary water pump, 47- Tertiary heat pump, 471- Quaternary water supply pipe, 472- Fifth-stage return pipe, 48- Secondary Stage 1 cooling tower, 481-stage 5 water supply pipe, 482-stage 6 return pipe, 4821-stage 7 water pump, 49-hot water storage tank, 491-stage 1 recovery pipe, 492-stage 1 input pipe, 4921-stage 8 water pump, 493-stage 2 recovery pipe, 494-stage 2 input pipe, 4941-stage 9 water pump, 495-stage 3 recovery pipe, 496-stage 3 input pipe, 4961-stage 10 water pump, 410-stage buffer tank. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description of it is provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0018] See appendix Figure 1As shown in this embodiment, a heat pump cogeneration application device for alcohol production includes a storage tank 1 for storing the alcohol solution to be distilled, a heating mechanism 2, and a staged cooling mechanism 4. The heating mechanism 2 includes at least one still 21 for distilling the alcohol solution. The water outlet of the storage tank 1 is connected to the water inlet of the still 21 through a pre-set feed pipe 14. The gas inlet of the storage tank 1 is connected to the water outlet of the still 21 through a pre-set gas transmission pipe 26. The storage tank 1 and the staged cooling mechanism 4 are connected through a pre-set primary condenser pipe 3. When the storage tank 1 conveys the alcohol solution to be distilled to the still 21 through the feed pipe 14 for distillation, the distilled alcohol vapor is conveyed to the staged cooling mechanism 4 along the gas transmission pipe 26, the storage tank 1, and the primary condenser pipe 3 for cooling, thereby realizing the condensation and liquefaction function of methanol vapor.

[0019] Furthermore, the storage tank 1 is equipped with an inlet pipe for feeding the alcohol solution to be processed into the storage tank 1, and a primary solenoid valve 141 for switching on and off is provided on the feed pipe 14. A drain pipe 15 is bypassed and led out from the feed pipe 14. The drain pipe 15 is equipped with a six-stage solenoid valve 151 for controlling the on and off. Specifically, the above-mentioned stills 21 are connected in parallel with each other. A gas supply pipe 26 is bypassed and led out to a gas supply branch pipe, which connects the stills 21 to the storage tank 1 and transports the alcohol vapor in the stills 21 to the storage tank 1, thereby improving the working efficiency of alcohol distillation. A drain pipe 15 is bypassed and led out to a drain branch pipe, which discharges the remaining solution after alcohol distillation in the stills 21 through the drain pipe 15 and the drain branch pipe, so as to continue a new round of alcohol distillation production.

[0020] See appendix Figure 1 As shown, in this embodiment, a temperature sensor 16 for detecting temperature is provided on the top of the storage tank 1, and an outlet 11 is provided on the top of the storage tank 1, which is connected to the first-stage condenser 3; a water outlet 12 is provided at the bottom of the storage tank 1, which is connected to the feed pipe 14. Specifically, the storage tank 1 transports the alcohol solution to be distilled to the still 21 through the feed pipe 14 for distillation. The distilled alcohol vapor is transported to the staged cooling mechanism 4 for cooling along the gas supply pipe 26, the storage tank 1 and the first-stage condenser 3, thereby realizing the purification and cooling recovery of the alcohol solution.

[0021] Furthermore, the heating mechanism 2 also includes a primary heat pump 22, which supplies hot water for distillation to the distiller 21. The inlet of the distiller 21 is connected to the outlet of the primary heat pump 22 via a pre-set heating pipe 24, and the outlet of the distiller 21 is connected to the inlet of the primary heat pump 22 via a pre-set primary return pipe 25. It also includes a primary buffer tank 23, located between the distiller 21 and the primary heat pump 22. A primary water pump 251 is installed on the primary return pipe 25 between the primary buffer tank 23 and the distiller 21. Specifically, by setting a primary buffer tank 23 between the distiller 21 and the primary heat pump 22, the high-temperature hot water output by the primary heat pump 22 can vaporize in the primary buffer tank 23 to generate high-temperature steam. This provides heat to the still 21. Secondly, it reduces the operating negative pressure of the first-stage heat pump 22, increasing its service life. Furthermore, the installation of a first-stage water pump 251 and a third-stage water pump 4122 on the heating pipe 24 effectively removes scale buildup and reduces maintenance costs. Additionally, the heating pipe 24 is positioned above the first-stage return pipe 25, allowing the high-temperature hot water supplied to the heating pipe 24 to continuously and thoroughly heat the alcohol solution to be distilled in the still 21 from bottom to top. Simultaneously, after the high-temperature hot water heats the still 21, the alcohol solution in the still 21 vaporizes to form alcohol vapor. The heat from the alcohol vapor is recovered by the first-stage heat pump 22, and the recovered heat is used to prepare the high-temperature hot water used in the still 21, thereby reducing the energy consumption and time required for directly preparing high-temperature hot water.

[0022] In this embodiment, the staged cooling mechanism 4 includes a primary condenser 41, a primary cooling tower 42, a secondary heat pump 43, a secondary condenser 45, a tertiary heat pump 47, and a chiller 46. The secondary heat pump 43 recovers the condensation heat from the primary condenser 41, and the tertiary heat pump 47 recovers the heat from the secondary condenser 45. A primary water supply pipe 411 is provided between the outlet of the primary condenser 41 and the inlet of the primary cooling tower 42, and a secondary return pipe 412 is provided between the inlet of the primary condenser 41 and the outlet of the primary cooling tower 42. A secondary water supply pipe 431 is bypassed from the primary water supply pipe 411, and a tertiary water return pipe 432 is bypassed from the secondary return pipe 412. The secondary water supply pipe 431 connects the inlet of the primary condenser 41 to the outlet of the secondary heat pump 43, and the tertiary return pipe 432 connects the outlet of the primary condenser 41 to the inlet of the secondary heat pump 43. A secondary buffer tank 44 is also included, located between the primary condenser 41 and the secondary heat pump 43. The primary water supply pipe 411 and the secondary return pipe 412 are connected to the secondary water supply pipe 43. Each stage is equipped with a seven-stage solenoid valve 4321 and an eight-stage solenoid valve 4311 for on / off control. A five-stage water pump 4322 is installed on the three-stage return pipe 432. A two-stage water pump 4111 and a two-stage solenoid valve 4112 for on / off control are installed on the first-stage water supply pipe 411. A three-stage solenoid valve 4121 for on / off control is installed on the second-stage return pipe 412. A four-stage solenoid valve 4611 and a six-stage water pump 4612 for on / off control are installed on the three-stage water supply pipe 461. A four-stage water pump 4622 and a five-stage solenoid valve for on / off control are installed on the fourth-stage return pipe 462. Valve 4621 specifically recovers heat from the heated cooling water on the primary condenser 41, recovers residual heat from the used cooling water via secondary heat pump 43, and uses the recovered heat to prepare hot water for supply to other processes. In addition, after the heat is recovered by secondary heat pump 43, the temperature of the used cooling water is lowered, and it can be used as cooling water for the primary condenser 41. It is then transported back to the primary condenser 41 to cool alcohol vapor via primary water supply pipe 411 and secondary water pump 4111.

[0023] See appendix Figure 1 As shown, in this embodiment, the top and bottom of the secondary condenser 45 are respectively provided with a secondary condenser tube 451 and an output tube 452; wherein, the secondary condenser tube 451 is used to input part of the uncondensed alcohol vapor from the primary condenser 41, and the output tube 452 is used to output the purified alcohol solution. By cooling the alcohol vapor in stages, the process requirements are met, and the purification of the alcohol vapor in the cooling and recovery process is guaranteed.

[0024] Furthermore, the inlet of the secondary condenser 45 is connected to the outlet of the chiller 46 via a pre-set tertiary water supply pipe 461, and the outlet of the secondary condenser 45 is connected to the inlet of the chiller 46 via a pre-set quaternary return pipe 462. The tertiary water supply pipe 461 is bypassed to lead out a quaternary water supply pipe 471, and the quaternary return pipe 462 is bypassed to lead out a quinary return pipe 472. The inlet of the secondary condenser 45 is connected to the outlet of the tertiary heat pump 47 via a quaternary water supply pipe 471, and the outlet of the secondary condenser 45 is connected to the inlet of the tertiary heat pump 47 via a quinary return pipe 472. It also includes a three-stage buffer water tank 410, which is located between the two-stage condenser 45 and the chiller 46. Specifically, similar to the two-stage heat pump 43 mentioned above, the three-stage heat pump 47 recovers heat from the used condensate of the two-stage condenser 45 and uses the recovered heat to produce hot water for use in other processes. At the same time, it lowers the temperature of the used cooling water, which can then be used as cooling water for the two-stage condenser 45. The cooling water is then returned to the two-stage condenser 45 through the four-stage return pipe 462 and the four-stage water pump 4622 to cool the alcohol vapor.

[0025] See appendix Figure 1 As shown, the staged cooling mechanism 4 further includes a secondary cooling tower 48. The inlet of the secondary cooling tower 48 is connected to the outlet of the chiller 46 via a pre-set five-stage water supply pipe 481, and the outlet of the secondary cooling tower 48 is connected to the inlet of the chiller 46 via a pre-set six-stage return pipe 482. The six-stage return pipe 482 is also equipped with a three-stage water pump 4821. Through the cooperation between the chiller 46 and the secondary cooling tower 48, the recovered cooling water is circulated and reused, which makes it easier for the chiller 46 to output low-temperature cooling water, improves production efficiency, and reduces costs.

[0026] It should be noted that, see appendix Figure 1 As shown, the aforementioned buffer water tank has a layered design inside, which separates unused water from used water to ensure that the temperature of the hot water is not affected by other factors.

[0027] Furthermore, the tiered cooling mechanism 4 also includes a hot water storage tank 49. The inlet of the hot water storage tank 49 is connected to the outlet of the first-stage heat pump 22 via a pre-set first-stage recovery pipe 491, and the outlet of the hot water storage tank 49 is connected to the inlet of the first-stage heat pump 22 via a pre-set first-stage input pipe 492. An eight-stage water pump 4921 is installed on the first-stage input pipe 492. The inlet of the hot water storage tank 49 is connected to the outlet of the second-stage heat pump 43 via a pre-set second-stage recovery pipe 493 and a second-stage input pipe 494. The outlet of the hot water storage tank 49 is connected to the inlet of the second-stage heat pump 43 via a pre-set... Some secondary input pipes 494 are connected, and the secondary input pipe 494 is equipped with a nine-stage water pump 4941; the inlet of the hot water storage tank 49 is connected to the outlet of the tertiary heat pump 47 through a pre-set tertiary recovery pipe 495, and the outlet of the hot water storage tank 49 is connected to the inlet of the tertiary heat pump 47 through a pre-set tertiary input pipe 496, and the tertiary input pipe 496 is also equipped with a ten-stage water pump 4961. The hot water produced by the primary heat pump 22, the secondary heat pump 43 and the tertiary heat pump 47 can be collected and kept warm through the hot water storage tank 49, which is convenient for use in other processes and achieves a multi-functional effect.

[0028] To facilitate explanation, the following section provides further explanation of the specific assembly process of the replacement alcohol distillation and cooling recovery device.

[0029] During distillation: First, the alcohol solution to be distilled is transported to the storage tank 1 via the feed pipe 14. Then, the alcohol solution to be distilled in the storage tank 1 is transported to the still 21 via the feed pipe 14 for distillation. During this process, the primary heat pump 22 heats the still 21, supplying high-temperature hot water to the primary water tank. The high-temperature hot water is then transported from bottom to top to the still 21 via the heating pipe 24 to distill the alcohol solution. At the same time, the high-temperature hot water used to prepare alcohol vapor is recovered via the primary reflux pipe 25 and transported back to the primary heat pump 22 to participate in the production of high-temperature hot water. As the alcohol evaporates, the alcohol vapor produced by the still 21 returns to the storage tank 1 via the gas delivery pipe 26 and enters the staged cooling mechanism 4 via the primary condenser pipe 3, thus completing the distillation of the alcohol solution.

[0030] During the cooling recovery process: alcohol vapor is sequentially condensed and recovered through the primary condenser 3, primary condenser 41, secondary condenser 451, and secondary condenser 45. During this process, the primary condenser 41 and the primary cooling tower 42 provide primary cooling. The condensate in the primary condenser 41 is circulated and cooled through the primary water supply pipe 411 and the secondary return pipe 412. In addition, some of the heated and used condensate is transported to the secondary heat pump 43 through the tertiary return pipe 432, which is connected to the secondary return pipe 412, for recovery and heating. The secondary heat pump 43 then returns the condensate, which has been heated to the required condensation temperature, to the primary condenser 41 through the secondary water supply pipe 431 to participate in the operation.

[0031] Secondly, according to the process setup, the chiller 46 delivers low-temperature condensate to the tertiary buffer tank 410 via the tertiary water supply pipe 461. When the condensate enters the secondary condenser 45 along with the alcohol vapor, the tertiary buffer tank 410 delivers the low-temperature condensate to the secondary condenser 45 for secondary cooling through the cooperation of the tertiary water supply pipe 461 and the 6th-stage water pump 4612. The condensate heated and used in the secondary condenser 45 is then delivered to the chiller 46 via the quaternary return pipe 462. The chiller 46 and the secondary cooling system... Tower 48 circulates and cools the heated condensate through the cooperation of the five-stage water supply pipe 481, the six-stage return pipe 482, and the seven-stage water pump 4821 before outputting it. At the same time, part of the heated condensate is transported to the three-stage heat pump 47 through the five-stage return pipe 472, which is connected to the four-stage return pipe 462, for recovery and heating. The three-stage heat pump 47 then re-inputs the condensate, which has been heated to the required temperature for condensation, into the two-stage condenser 45 through the four-stage water supply pipe 471 to participate in the operation.

[0032] Finally, the cooled and liquefied alcohol solution is output from the output pipe 452 of the secondary condenser 45, thus completing the cooling and recovery of the alcohol solution. The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any modifications or variations made by those skilled in the art to the technical solution of this utility model without departing from its scope are equivalent embodiments of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from its scope should be covered within the protection scope of this utility model.

Claims

1. A heat pump cogeneration application device for alcohol production, comprising a storage tank (1) for storing an alcohol solution to be distilled, a heating mechanism (2), and a staged cooling mechanism (4), wherein the heating mechanism (2) includes at least one still (21) for distilling the alcohol solution, the outlet of the storage tank (1) is connected to the inlet of the still (21) via a pre-set feed pipe (14), the inlet of the storage tank (1) is connected to the outlet of the still (21) via a pre-set gas supply pipe (26), and the storage tank (1) is connected to the staged cooling mechanism (4) via a pre-set primary condenser pipe (3), characterized in that: The heating mechanism (2) further includes a primary heat pump (22), wherein the primary heat pump (22) is used to supply hot water for distillation to the distiller (21), the inlet of the distiller (21) and the outlet of the primary heat pump (22) are connected by a pre-set heating pipe (24), and the outlet of the distiller (21) and the inlet of the primary heat pump (22) are connected by a pre-set primary return pipe (25); the staged cooling mechanism (4) includes a primary condenser (41), a primary cooling tower (42), a secondary heat pump (43), a secondary condenser (45), a tertiary heat pump (47), and a refrigerator (46), wherein, The secondary heat pump (43) is used to recover the condensation heat of the primary condenser (41), and the tertiary heat pump (47) is used to recover the heat of the secondary condenser (45). A primary water supply pipe (411) is provided between the outlet of the primary condenser (41) and the inlet of the primary cooling tower (42), and a secondary return pipe (412) is provided between the inlet of the primary condenser (41) and the outlet of the primary cooling tower (42). A secondary water supply pipe (431) is bypassed from the primary water supply pipe (411), and a tertiary return pipe (432) is bypassed from the secondary return pipe (412). The tertiary reflux pipe (432) is used to connect the inlet of the primary condenser (41) to the outlet of the secondary heat pump (43), and the tertiary reflux pipe (432) is used to connect the outlet of the primary condenser (41) to the inlet of the secondary heat pump (43); the secondary condenser (45) is provided with a secondary condenser pipe (451) and an output pipe (452) at its top and bottom, respectively; wherein, the secondary condenser pipe (451) is used to input some uncondensed alcohol vapor from the primary condenser (41), and the output pipe (452) is used to output the purified alcohol solution; the inlet of the secondary condenser (45) and the outlet of the refrigerator (46) are connected by a pre-connection pipe. The system is connected to a three-stage water supply pipe (461). The outlet of the secondary condenser (45) is connected to the inlet of the chiller (46) through a pre-set four-stage return pipe (462). A four-stage water supply pipe (471) is bypassed from the three-stage water supply pipe (461), and a five-stage return pipe (472) is bypassed from the four-stage return pipe (462). The inlet of the secondary condenser (45) is connected to the outlet of the tertiary heat pump (47) through the four-stage water supply pipe (471), and the outlet of the secondary condenser (45) is connected to the inlet of the tertiary heat pump (47) through the five-stage return pipe (472).

2. The heat pump cogeneration application device for alcohol production according to claim 1, characterized in that: The feeding pipe (14) is equipped with a first-stage solenoid valve (141) for switching on and off. A drain pipe (15) is bypassed from the feeding pipe (14). The drain pipe (15) is equipped with a sixth-stage solenoid valve (151) for controlling the switching on and off. The first-stage water supply pipe (411) is equipped with a second-stage water pump (4111) and a second-stage solenoid valve (4112) for controlling the switching on and off. The second-stage return pipe (412) is equipped with a third-stage solenoid valve (4121) for controlling the switching on and off. The third-stage water supply pipe (461) is equipped with a fourth-stage solenoid valve (4611) for controlling the switching on and off and a sixth-stage water pump (4612). The fourth-stage return pipe (462) is equipped with a fourth-stage water pump (4622) and a fifth-stage solenoid valve (4621) for controlling the switching on and off.

3. A heat pump cogeneration application device for alcohol production according to claim 1, characterized in that: The top of the liquid storage tank (1) is equipped with a temperature sensor (16) for detecting temperature. The top of the liquid storage tank (1) is equipped with an air outlet (11), which is connected to the first-stage condenser (3). The bottom of the liquid storage tank (1) is equipped with a water outlet (12), which is connected to the feed pipe (14).

4. A heat pump cogeneration application device for alcohol production according to claim 1, characterized in that: The storage tank (1) is provided with an inlet pipe (13) for feeding the alcohol solution to be processed into the storage tank (1).

5. A heat pump cogeneration application device for alcohol production according to claim 1, characterized in that: It also includes a primary buffer tank (23), wherein the primary buffer tank (23) is located between the distiller (21) and the primary heat pump (22); a primary water pump (251) is provided on the primary reflux pipe (25) between the primary buffer tank (23) and the distiller (21).

6. A heat pump cogeneration application device for alcohol production according to claim 1, characterized in that: It also includes a secondary buffer tank (44), wherein the secondary buffer tank (44) is located between the primary condenser (41) and the secondary heat pump (43); the primary water supply pipe (411) and the secondary return pipe (412) are respectively equipped with a seven-stage solenoid valve (4321) and an eight-stage solenoid valve (4311) for controlling the on and off, and the tertiary return pipe (432) is equipped with a five-stage water pump (4322).

7. A heat pump cogeneration application device for alcohol production according to claim 1, characterized in that: It also includes a three-stage buffer tank (410), wherein the three-stage buffer tank (410) is located between the two-stage condenser (45) and the refrigerator (46).

8. A heat pump cogeneration application device for alcohol production according to claim 1, characterized in that: The graded cooling mechanism (4) also includes a secondary cooling tower (48). The inlet of the secondary cooling tower (48) is connected to the outlet of the chiller (46) through a pre-set five-stage water supply pipe (481). The outlet of the secondary cooling tower (48) is connected to the inlet of the chiller (46) through a pre-set six-stage return pipe (482). The six-stage return pipe (482) is also equipped with a three-stage water pump (4821).

9. A heat pump cogeneration application device for alcohol production according to claim 1, characterized in that: The graded cooling mechanism (4) also includes a hot water storage tank (49). The inlet of the hot water storage tank (49) is connected to the outlet of the first-stage heat pump (22) through a pre-set first-stage recovery pipe (491). The outlet of the hot water storage tank (49) is connected to the inlet of the first-stage heat pump (22) through a pre-set first-stage input pipe (492). The first-stage input pipe (492) is equipped with an eight-stage water pump (4921).

10. A heat pump cogeneration application device for alcohol production according to claim 9, characterized in that: The inlet of the hot water storage tank (49) is connected to the outlet of the secondary heat pump (43) via a pre-set secondary recovery pipe (493) and a secondary input pipe (494). The outlet of the hot water storage tank (49) is connected to the inlet of the secondary heat pump (43) via a pre-set secondary input pipe (494). The secondary input pipe (494) is equipped with a nine-stage water pump (4941). The inlet of the hot water storage tank (49) is connected to the outlet of the tertiary heat pump (47) via a pre-set tertiary recovery pipe (495). The outlet of the hot water storage tank (49) is connected to the inlet of the tertiary heat pump (47) via a pre-set tertiary input pipe (496). The tertiary input pipe (496) is also equipped with a ten-stage water pump (4961).

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