CN213537692U - Heat recovery type high efficiency heat pump system - Google Patents
Heat recovery type high efficiency heat pump system Download PDFInfo
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- CN213537692U CN213537692U CN202022125624.XU CN202022125624U CN213537692U CN 213537692 U CN213537692 U CN 213537692U CN 202022125624 U CN202022125624 U CN 202022125624U CN 213537692 U CN213537692 U CN 213537692U
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Abstract
The utility model discloses a heat recovery type high-efficiency heat pump system, which comprises a heating and drying unit and a condensing and dehumidifying unit; the heating and drying unit comprises a heat pump unit, a stepping motor, a double-screw propeller, a jacket type stirring and drying tank and a hot water circulating pump; the condensation dehumidification unit comprises a heat pump unit, a cold water circulating pump, a shell and tube condenser, a drainage pump and a water tank; the heat pump unit, the jacketed stirring drying tank and the hot water circulating pump are sequentially connected through a hot water pipeline to form a hot water circulating loop; the heat pump unit, the cold water circulating pump and the shell-and-tube condenser are sequentially connected through a cold water pipeline to form a cold water circulating loop; the jacketed stirring drying tank is respectively connected with a vacuum pump and a shell-and-tube condenser through pipelines. The utility model discloses both can solve the not good problem of heat transfer performance that the limited area of contact of sludge vacuum mummification process arouses, can effectively improve heat pump system operating efficiency and operation security again.
Description
Technical Field
The utility model relates to a heat pump technology field, concretely relates to heat recovery type high efficiency heat pump system.
Background
Sludge drying is used as the final link of sludge treatment, and has a vital role in the treatment and disposal process of sludge. At present, the conventional sludge drying means comprises steam drying and heat pump hot air type sludge drying. Compared with the traditional steam drying, the heat pump hot air type sludge drying has the advantages of low energy consumption and good drying effect, realizes the drying reduction of the sludge in a thermal convection mode, and is more and more widely applied in recent years. However, the temperature of the conventional heat pump hot air type drying is high, and after the volatile combustible organic gas is mixed with dust generated in the sludge drying process and air serving as a convection heat exchange medium, flammable and explosive dust gas with extremely high risk is easily formed, so that serious potential safety hazards exist.
Compared with heat pump hot air type sludge drying, the vacuum drying temperature is greatly reduced, the volatile amount of volatile gas is greatly reduced, and meanwhile, no combustion adjuvant air exists in the drying process, so that the potential safety hazard is obviously reduced. However, when sludge is dried based on the vacuum drying principle, the inside of the sludge presents a porous characteristic along with drying and water loss of the sludge, the contact area between the heating surface and the surface of the sludge is gradually reduced, the contact heat transfer resistance is gradually increased, the heat transfer performance is deteriorated, and the drying effect is poor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of above-mentioned prior art, the utility model provides a heat recovery type high efficiency heat pump system, this system adopt to carry out the mud stirring by step motor driven double helix propeller, have solved the not good problem of heat transfer performance that the limited area of contact of mud vacuum mummification process arouses, through steam vacuum high-efficient condensation and vapor latent heat recycle simultaneously, have realized heat two-way cyclic utilization, have effectively improved system operating efficiency and operation security.
In order to achieve the above object, the utility model adopts the following technical scheme:
a heat recovery type high-efficiency heat pump system comprises a heating and drying unit and a condensing and dehumidifying unit; the heating and drying unit comprises a heat pump unit, a stepping motor, a double-screw propeller, a jacket type stirring and drying tank and a hot water circulating pump; the condensation dehumidification unit comprises a heat pump unit, a cold water circulating pump, a shell and tube condenser, a drainage pump and a water tank;
the double-screw propeller is arranged inside the jacketed stirring drying tank and is driven by a stepping motor arranged outside the jacketed stirring drying tank;
the high-pressure side of the heat pump unit, a jacket of the jacket type stirring drying tank and a hot water circulating pump are sequentially connected through a hot water pipeline to form a hot water circulating loop; the low-pressure side of the heat pump unit, the cold water circulating pump and the tube body of the shell-and-tube condenser are sequentially connected through a cold water pipeline to form a cold water circulating loop;
the steam outlet of the jacketed stirring drying tank is divided into two paths, one path is connected with the vacuum pump through the first valve, and the other path is connected with the water drainage tank after passing through the second valve, the shell of the shell-and-tube condenser, the third valve and the water drainage pump in sequence.
Preferably, hot water is placed in a jacket of the jacket type stirring and drying tank, a hot water inlet is formed in the bottom surface of the jacket, and a hot water outlet is formed in the top surface of the jacket; the steam outlet is arranged in the upper area in the jacketed stirring drying tank; the upper surface of the shell-and-tube condenser is provided with a steam inlet, and the lower surface of the shell-and-tube condenser is provided with a condensed water outlet.
Preferably, the two sets of screws of the double-screw propeller are designed in an unequal distance mode.
Preferably, the heat pump system can obtain three operation modes of a feeding mode, a vacuum pumping mode and a drying mode through a switching valve, a circulating pump, a vacuum pump, a drainage pump, a stepping motor and a heat pump unit.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a carry out the mud stirring by step motor driven double helix propeller, two sets of spirals adopt not equidistance design, have effectively avoided the bonding phenomenon of mud in double-layered shell type stirring drying jar, have solved the not good problem of heat transfer performance that the limited area of contact of mud vacuum drying process arouses.
2. The utility model discloses the steam that the sludge drying process produced carries out the heat exchange with the cold water that heat pump set prepared under the effect of drainage pump, forms the comdenstion water through the phase transition condensation, need not to operate the vacuum pump, has realized the high-efficient vacuum condensation of steam, has reduced the heating temperature in the double-layered shell type stirring drying jar and the condensation temperature of heat pump set high-pressure side simultaneously by a wide margin, and heat pump set low condensation pressure moves, has effectively improved heat pump system operating efficiency and operation security.
3. The utility model discloses heat pump set low pressure side recycle vapor latent heat, the evaporating temperature of heat pump set low pressure side has increased substantially, has effectively improved heat pump set operating efficiency, and the heat pump system energy consumption is showing and is reducing.
Drawings
FIG. 1 is a schematic view of a heat recovery type high efficiency heat pump system of the present invention;
fig. 2 is the utility model discloses a heat recovery type high efficiency heat pump system is the running state diagram of heat pump set, step motor, hot water circulating pump, vacuum pump, cold water circulating pump, drain pump, first valve, second valve, third valve under different modes.
Description of reference numerals: 1-a heat pump unit; 2-a step motor; 3-a double-helix propeller; 4-jacket type stirring drying tank; 5-hot water circulating pump; 6-a first valve; 7-a vacuum pump; 8-a cold water circulation pump; 9-shell-and-tube condenser; 10-a second valve; 11-a third valve; 12-a drainage pump; 13-a water tank; a-hot water pipeline; b-a steam line; c-cold water pipeline; d-an air extraction pipeline; e-a drain line; a-a hot water inlet; b-a hot water outlet; c-a steam outlet; d-a steam inlet; e-a condensate outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implying any number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
As shown in fig. 1, the heat recovery type high efficiency heat pump system of the present embodiment mainly comprises a heating and drying unit and a condensing and dehumidifying unit.
The heating and drying unit mainly comprises a heat pump unit 1, a stepping motor 2, a double-screw propeller 3, a jacket type stirring and drying tank 4 and a hot water circulating pump 5. The condensation dehumidification unit mainly comprises a heat pump unit 1, a cold water circulating pump 8, a shell-and-tube condenser 9, a drainage pump 12 and a water tank 13.
Hot water is placed in a jacket of the jacket type stirring drying tank 4, a hot water inlet a is formed in the bottom surface of the jacket, a hot water outlet b is formed in the top surface of the jacket, and a steam outlet c is formed in the upper area in the jacket type stirring drying tank 4. The upper surface of the shell-and-tube condenser 9 is provided with a steam inlet d, and the lower surface of the shell-and-tube condenser 9 is provided with a condensed water outlet e.
The high pressure side of the heat pump unit 1, the jacket of the jacket type stirring drying tank 4 and the hot water circulating pump 5 are sequentially connected through a hot water pipeline A to form a hot water circulating loop. The low-pressure side of the heat pump unit 1, the cold water circulating pump 8 and the tubes of the shell-and-tube condenser 9 are connected in sequence through a cold water pipeline C to form a cold water circulating loop.
A pipeline of a steam outlet c of the jacketed stirring drying tank 4 is divided into two branches, one branch is connected with a vacuum pump 7 through a pipeline, and a first valve 6 is arranged on the branch; the other branch is connected with a steam inlet d on the upper surface of the shell-and-tube condenser 9 through a pipeline, and a second valve 10 is arranged on the branch.
The condensate outlet E on the lower surface of the shell-and-tube condenser 9 is connected to the third valve 11 via a drain line E, the third valve 11 is connected to the drain pump 12 via the drain line E, and the drain pump 12 is connected to the drain tank 13 via the drain line E.
The double-screw propeller 3 is arranged in the jacketed stirring and drying tank 4 and is driven by the stepping motor 2 arranged outside the jacketed stirring and drying tank 4, and preferably, two sets of screws of the double-screw propeller 3 are designed in an unequal distance mode.
As shown in fig. 2, the utility model discloses a heat recovery type high efficiency heat pump system can acquire three kinds of operational modes of reinforced mode, vacuum pumping mode, mummification mode through switching heat pump set 1, step motor 2, hot water circulating pump 5, vacuum pump 7, cold water circulating pump 8, drain pump 12, first valve 6, second valve 10 and third valve 11.
The feeding mode is as follows: and (3) closing the heat pump unit 1, the stepping motor 2, the hot water circulating pump 5, the vacuum pump 7, the cold water circulating pump 8, the drainage pump 12, the first valve 6, the second valve 10 and the third valve 11, and adding wet sludge into the jacket type stirring and drying tank 4, so as to complete the feeding of the system.
A vacuum air pumping mode: and (2) opening the stepping motor 2, the vacuum pump 7 and the first valve 6, closing the heat pump unit 1, the hot water circulating pump 5, the cold water circulating pump 8, the drainage pump 12, the second valve 10 and the third valve 11, and when a certain vacuum degree is reached in the jacket type stirring and drying tank 4, closing the stepping motor 2, the vacuum pump 7 and the first valve 6, so as to finish the vacuum air extraction of the system.
Drying mode: the heat pump unit 1, the stepping motor 2, the hot water circulating pump 5, the cold water circulating pump 8, the drainage pump 12, the second valve 10 and the third valve 11 are started, and the vacuum pump 7 and the first valve 6 are closed. Hot water prepared by the heat pump unit 1 enters a jacket of the jacket type stirring and drying tank 4 at a hot water inlet a under the action of the hot water circulating pump 5, and exchanges heat with wet sludge in the tank to form low-temperature hot water, and the low-temperature hot water flows out from a hot water outlet b and flows through the hot water circulating pump 5 to enter the heat pump unit 1 to be heated. Cold water prepared by the heat pump unit 1 flows through the cold water circulating pump 8, enters the shell-and-tube condenser 9, exchanges heat with steam generated in the jacketed stirring drying tank 4 to form high-temperature cold water, and the high-temperature cold water enters the heat pump unit 1 to be cooled under the action of the cold water circulating pump 8. Wet sludge in the jacketed stirring drying tank 4 exchanges heat with hot water under the stirring action of the double-screw propeller 3, the wet sludge absorbs heat to form dry sludge, steam formed in the wet sludge drying process flows out of a steam outlet c, flows through the second valve 10 through a pipeline, enters the shell and tube condenser 9 from a steam inlet d, the steam and cold water prepared by the heat pump unit 1 are subjected to heat exchange condensation to form water, formed condensate water enters the drainage box 13 through the drainage pipeline E under the action of the drainage pump 12, and thus the sludge drying is completed.
The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention should be included within the scope of the present invention.
Claims (4)
1. A heat recovery type high efficiency heat pump system characterized in that: comprises a heating and drying unit and a condensing and dehumidifying unit; the heating and drying unit comprises a heat pump unit, a stepping motor, a double-screw propeller, a jacket type stirring and drying tank and a hot water circulating pump; the condensation dehumidification unit comprises a heat pump unit, a cold water circulating pump, a shell and tube condenser, a drainage pump and a water tank;
the double-screw propeller is arranged inside the jacketed stirring drying tank and is driven by a stepping motor arranged outside the jacketed stirring drying tank;
the high-pressure side of the heat pump unit, a jacket of the jacket type stirring drying tank and a hot water circulating pump are sequentially connected through a hot water pipeline to form a hot water circulating loop; the low-pressure side of the heat pump unit, the cold water circulating pump and the tube body of the shell-and-tube condenser are sequentially connected through a cold water pipeline to form a cold water circulating loop;
the steam outlet of the jacketed stirring drying tank is divided into two paths, one path is connected with the vacuum pump through the first valve, and the other path is connected with the water drainage tank after passing through the second valve, the shell of the shell-and-tube condenser, the third valve and the water drainage pump in sequence.
2. A heat recovery type high efficiency heat pump system as claimed in claim 1, wherein: hot water is placed in a jacket of the jacket type stirring drying tank, a hot water inlet is formed in the bottom surface of the jacket, and a hot water outlet is formed in the top surface of the jacket; the steam outlet is arranged in the upper area in the jacketed stirring drying tank; the upper surface of the shell-and-tube condenser is provided with a steam inlet, and the lower surface of the shell-and-tube condenser is provided with a condensed water outlet.
3. A heat recovery type high efficiency heat pump system as claimed in claim 1, wherein: the two sets of the screws of the double-screw propeller are designed in unequal distances.
4. A heat recovery type high efficiency heat pump system as claimed in claim 3, wherein: the heat pump system can obtain three operation modes of a feeding mode, a vacuum pumping mode and a drying mode through a switching valve, a circulating pump, a vacuum pump, a draining pump, a stepping motor and a heat pump unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022125624.XU CN213537692U (en) | 2020-09-24 | 2020-09-24 | Heat recovery type high efficiency heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022125624.XU CN213537692U (en) | 2020-09-24 | 2020-09-24 | Heat recovery type high efficiency heat pump system |
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| CN213537692U true CN213537692U (en) | 2021-06-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112094031A (en) * | 2020-09-24 | 2020-12-18 | 中国科学院广州能源研究所 | Heat recovery type high-efficiency heat pump system and control method thereof |
| CN113429106A (en) * | 2021-06-30 | 2021-09-24 | 荏原冷热系统（中国）有限公司 | Mud drying device and method |
-
2020
- 2020-09-24 CN CN202022125624.XU patent/CN213537692U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112094031A (en) * | 2020-09-24 | 2020-12-18 | 中国科学院广州能源研究所 | Heat recovery type high-efficiency heat pump system and control method thereof |
| CN113429106A (en) * | 2021-06-30 | 2021-09-24 | 荏原冷热系统（中国）有限公司 | Mud drying device and method |
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