CN212108865U - Energy-saving constant-temperature humidity control air conditioning system for drying precision casting shell - Google Patents
Energy-saving constant-temperature humidity control air conditioning system for drying precision casting shell Download PDFInfo
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- CN212108865U CN212108865U CN202020671375.1U CN202020671375U CN212108865U CN 212108865 U CN212108865 U CN 212108865U CN 202020671375 U CN202020671375 U CN 202020671375U CN 212108865 U CN212108865 U CN 212108865U
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Abstract
The utility model relates to a wet system of constant temperature accuse. The energy-saving constant-temperature humidity control unit comprises an air return section, a rotating wheel dehumidification section, a rear heat replacement section and a fan section, wherein the air return section, the rotating wheel dehumidification section, the rear heat replacement section and the fan section are sequentially communicated from front to back, a regeneration heater is installed on a regeneration area inlet of the rotating wheel dehumidification section, a regeneration fan is installed on a regeneration area outlet of the rotating wheel dehumidification section, the air return section is communicated with a return air inlet of a casting workshop through a return air pipe, a temperature and humidity sensor is installed on the return air pipe, the fan section is communicated with an air supply outlet of the casting workshop through an air supply pipe, and the rear heat replacement section is communicated with refrigeration circulating water. The utility model provides a precision casting production technology realize humiture independent control to the requirement of the low humid environment of constant temperature, reduce the drying time of work piece, improve production efficiency, reduce energy consumption.
Description
Technical Field
The utility model relates to a wet system of constant temperature accuse, more specifically say, relate to a wet air conditioning system of energy-conserving constant temperature accuse that is used for precision casting system shell drying.
Background
In the precision casting production process, the surface layer and the back layer are divided into two main process sections according to the process drying flow of the workpiece, and in order to ensure the drying speed and quality of the workpiece, the temperature and humidity environment of each process section must be strictly controlled. The existing dehumidification system mostly adopts a single surface cooling dehumidification system to dehumidify, such as low-temperature chilled water dehumidification, direct evaporation cooling dehumidification, the dehumidification principle is to carry out condensation dehumidification by reducing the air temperature below the dew point temperature, because the heat and humidity combined treatment causes energy waste and has the problems of low temperature and humidity control precision, small dehumidification amount and the like under the low-temperature environment, and the environment with the relative humidity requirement lower than 40% can not be realized.
Therefore, it is necessary to satisfy the requirements of the precision casting constant-temperature low-humidity production environment by an energy-saving and efficient constant-temperature humidity control system.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide an energy-saving constant-temperature humidity-control air conditioning system, which on one hand meets the requirements of the production process on a constant-temperature low-humidity environment, realizes independent temperature and humidity control, reduces the drying time of a workpiece and improves the production efficiency; on the other hand, the waste heat recovery system is used for recycling the discharged waste heat, so that the energy consumption is reduced, and the aim of saving energy is fulfilled.
The utility model discloses an energy-conserving constant temperature accuse wet air conditioning system for it is dry that precision casting system shell, its special character lies in including the energy-conserving constant temperature accuse wet unit that is used for 28 cooling dehumidification in foundry shop, energy-conserving constant temperature accuse wet unit includes return air section 1 that is linked together in proper order after to from before, runner dehumidification section 4, back replacement heat section 5, fan section 6, install regeneration heater 9 on the regeneration zone import 32 of runner dehumidification section 4, install regeneration fan 10 on the regeneration zone export 33 of runner dehumidification section 4, return air section 1 is linked together through return air pipe 27 and foundry shop return air inlet, install temperature and humidity sensor 12 on the return air pipe 27, fan section 6 is linked together through blast pipe 29 and foundry shop air supply outlet, back replacement heat section 5 intercommunication has freezing circulating water, be equipped with the water inlet circulation pipeline that is linked together with the water inlet of back replacement heat section 5 between back replacement heat section 5 and the freezing circulating water, The water outlet circulation pipeline is communicated with a water outlet of the rear heat exchange section 5, and an electric regulating valve 11, a regenerative heater 9, a regenerative fan 10, the electric regulating valve 11 and a temperature and humidity sensor 12 are all controlled by a PLC (programmable logic controller);
the air return section 1 is provided with an air inlet 20 and a fresh air inlet 21, the air inlet 20 is communicated with an air return pipe 27, and the fresh air inlet 21 is communicated with external fresh air;
a filtering section 2 and a front heat-exchanging section 3 are sequentially arranged between the air return section 1 and the rotating wheel dehumidification section 4 from front to back, and the front heat-exchanging section 3 is communicated with refrigeration circulating water;
the regenerative heater 9 is connected with a heat recoverer 8, the heat recoverer 8 is provided with a regenerative fresh air inlet 30, a regenerative fresh air outlet 31, a high-temperature side inlet 34 and a high-temperature side outlet 35, wherein an outlet of the regenerative fan 10 is communicated with the high-temperature side inlet 34, and the high-temperature side outlet 35 is connected with outdoor atmosphere;
and a flow equalizing section 7 is also arranged between the fan section 6 and the casting shop 28, an air outlet 22 is formed in the flow equalizing section 7, and the air outlet 22 is communicated with an air supply pipe 29.
A temperature control dehumidification method for an energy-saving constant-temperature humidity control air conditioning system for drying a precision casting shell is characterized by comprising the following steps:
1. the air in the casting shop 28 is delivered to the air return section 1 through the air return pipe 27;
the air return section 1 is also communicated with external fresh air, so that the air quality of a workshop is improved, and the micro-positive pressure of the workshop can be kept;
the outlet of the air return section 1 is also communicated with a filtering section 2 to remove dust in a workshop;
the outlet of the filtering section 2 is also communicated with a front replacement hot section 3, and preliminary dehumidification is carried out through the front replacement hot section 3;
2. the air output from the air return section 1 is conveyed to the rotary wheel dehumidification section 4 for deep dehumidification, and as the regeneration area inlet 32 of the rotary wheel dehumidification section 4 is provided with the regeneration heater 9 and the regeneration area outlet 33 of the rotary wheel dehumidification section 4 is provided with the regeneration fan 10, the moisture absorbent in the rotary wheel regeneration area can be continuously regenerated, so that the rotary wheel dehumidification section 4 can be continuously provided with moisture absorption performance;
the regeneration heater 9 is connected with a heat recoverer 8, a regeneration fresh air inlet 30, a high-temperature side inlet 34 and a high-temperature side outlet 35 are arranged on the heat recoverer 8, wherein an outlet of a regeneration fan 10 is communicated with the high-temperature side inlet 34, the high-temperature side outlet 35 is connected with outdoor atmosphere, the regeneration fresh air enters the regeneration heater 9 after being preheated by the heat recoverer 8, high-temperature and high-humidity air from the regeneration fan 10 is input into the heat recoverer 8 through the high-temperature side inlet 34, and waste heat is used for preheating the regeneration fresh air, so that the air inlet temperature is increased;
3. the dehumidified air enters the rear replacement heat section 5 to be cooled, and the opening of the electric regulating valve 11 is controlled by the PLC, so that temperature regulation is realized;
4. the air after temperature reduction and humidity reduction is conveyed to a casting shop 28 through a fan section 6;
and a flow equalizing section 7 is also arranged between the fan section 6 and the casting shop 28, and the flow equalizing section 7 can reduce airflow disturbance and stably convey air to the casting shop 28.
The utility model has the advantages that: the utility model provides a satisfy dry constant temperature accuse wet air conditioning system of precision casting system shell and dehumidification method. On one hand, the control requirement on the constant-temperature low-humidity environment is realized through the energy-saving constant-temperature humidity control unit, the requirement of a shell-making drying line on the drying environment in the precision casting industry is met, the drying time of the shell mold is shortened, and the production efficiency is improved; on the other hand, waste heat discharged in the process of technological treatment is recycled by using a waste heat recovery technology, so that the operation energy consumption of equipment is reduced, and the operation cost is saved; the system is economical, efficient, advanced in control, safe, reliable and easy to popularize and apply.
Drawings
FIG. 1: the utility model relates to a schematic structural diagram of an embodiment 1 of an energy-saving constant-temperature humidity-control air conditioning system for drying shells by precision casting;
FIG. 2: the utility model relates to a wet air conditioning system embodiment 2's of energy-conserving constant temperature accuse for precision casting system shell is dry structural schematic.
In the figure: 1. a return air section; 2. a filtration section; 3. a front displacement hot section; 4. a rotary wheel dehumidification section; 5. a post-displacement hot section; 6. a fan section; 7. a current equalizing section; 8. a heat recovery device; 9. a regenerative heater; 10. a regenerative fan; 11. an electric control valve; 12. a temperature and humidity sensor; 20. An air inlet; 21. a fresh air inlet; 22. an air outlet; 27. A return air duct; 28. a foundry; 29. an air supply pipe; 30. a regeneration fresh air inlet; 31. a regenerated fresh air outlet; 32. an inlet of the regeneration zone; 33. a regeneration zone outlet; 34. a high temperature side inlet; 35. and a high-temperature side outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides an energy-saving constant-temperature humidity-controlling air conditioning system for precision casting and shell-making drying, which includes an energy-saving constant-temperature humidity-controlling unit for cooling and dehumidifying a casting shop 28, the energy-saving constant-temperature humidity-controlling unit includes a return air section 1, a rotary wheel dehumidification section 4, a rear replacement heat section 5 and a fan section 6, which are sequentially communicated from front to rear, a regeneration heater 9 is installed on a regeneration zone inlet 32 of the rotary wheel dehumidification section 4, a regeneration fan 10 is installed on a regeneration zone outlet 33 of the rotary wheel dehumidification section 4, the return air section 1 is communicated with a return air inlet of the casting shop through a return air pipe 27, a temperature and humidity sensor 12 is installed on the return air pipe 27, the fan section 6 is communicated with an air outlet of the casting shop through an air supply pipe 29, the rear replacement heat section 5 is communicated with refrigeration circulating water, a water inlet circulating pipeline communicated with a water inlet of the rear replacement heat, And the water outlet circulation pipeline is communicated with a water outlet of the rear replacement heat section 5, and an electric regulating valve 11, a regenerative heater 9, a regenerative fan 10, the electric regulating valve 11 and a temperature and humidity sensor 12 are all controlled by a PLC (programmable logic controller). An electric regulating valve 11 is installed on the water outlet circulating pipeline, a temperature and humidity sensor 12 is installed on the air return pipe 27, the opening degree of the electric regulating valve 11 is regulated according to the return air temperature of the foundry 28 by the energy-saving constant-temperature humidity control unit through a PLC controller, and the dehumidification capacity of the rotating wheel dehumidification section 4 is controlled according to the return air humidity of the foundry, so that the independent control of the temperature and the humidity is realized, and the temperature and humidity control precision is improved.
Example 2
The energy-saving constant-temperature humidity-controlling air conditioning system for drying the precision casting shell manufacturing of the embodiment is different from the embodiment 1 by referring to the attached figure 2: the air return section 1 is provided with an air inlet 20 and a fresh air inlet 21, the air inlet 20 is communicated with an air return pipe 27, and the fresh air inlet 21 is communicated with external fresh air; in order to ensure the temperature and humidity stability of a casting workshop, a part of outdoor fresh air can be introduced into the air return section of the constant-temperature humidity control unit, and the fresh air and the return air are mixed and then treated, so that the workshop is in a micro-positive pressure state to prevent the outside air of a drying room from flowing into the workshop, the air quality of the workshop can be improved, and the working environment of workers is improved.
A filtering section 2 and a front heat-exchanging section 3 are sequentially arranged between the air return section 1 and the rotating wheel dehumidification section 4 from front to back, the front heat-exchanging section 3 is connected with the freezing circulating water, and the front heat-exchanging section 3 is communicated with the freezing circulating water; a part of dust is generated in the drying process of a casting workshop workpiece, and in order to ensure the normal operation of a constant-temperature humidity control unit, a filtering section 2 is arranged in the unit to purify circulating air, so that the dust can be prevented from entering a rotating wheel of a rotating wheel dehumidification section while the air quality of the workshop is improved, and the stable operation of the system is ensured;
the regenerative heater 9 is connected with a heat recoverer 8, the heat recoverer 8 is provided with a regenerative fresh air inlet 30, a regenerative fresh air outlet 31, a high-temperature side inlet 34 and a high-temperature side outlet 35, wherein the outlet of the regenerative fan 10 is communicated with the high-temperature side inlet 34, and the high-temperature side outlet 35 is connected with outdoor atmosphere; the rotating wheel dehumidification section 4 mainly absorbs moisture in air by using hydrophilicity of a moisture absorbent, the moisture absorbent material of the rotating wheel is usually silica gel, a molecular sieve, lithium chloride and a composite body of the silica gel, the rotating wheel is of a honeycomb structure, the rotating wheel is divided into two fan-shaped areas by a sealing strip, a processing area with a central angle of 270 degrees and a regeneration area with a central angle of 90 degrees, after the processed wet air passes through the processing area of the rotating wheel dehumidification section, because the water vapor partial pressure of the moisture absorbent in the rotating wheel is lower than the water vapor partial pressure of the processed wet air at normal temperature, the moisture in the processed air is reduced after being absorbed by the moisture absorbent in the rotating wheel, the wet air is dried, the moisture absorbent is saturated to a certain degree, the moisture absorption process is terminated, in order to maintain the performance of the moisture absorbent, the moisture absorbent needs to be regenerated, the regenerated air is firstly preheated by a heat recoverer 8, enters a regeneration heater 9 and is heated to a set regeneration, then enters a regeneration area of a rotating wheel dehumidification section 4, the water vapor partial pressure of air is lower than that of a moisture absorbent in the rotating wheel at high temperature, so that the originally adsorbed water is desorbed, the moisture absorbent is fully regenerated, the rotating wheel recovers the moisture absorption capacity, the regenerated fresh air passing through the regeneration area of the rotating wheel is changed into wet air with large moisture content, and then enters a heat recovery device 8 through a regeneration fan 10 to exchange heat with the regenerated fresh air and then is discharged to the outside, and the heat recovery device 8 can adopt a plate type heat exchanger, a heat pipe type heat exchanger, a shell and tube type heat exchanger and other forms to realize the gas-gas heat exchange.
A flow equalizing section 7 is further arranged between the fan section 6 and the casting shop 28, an air outlet 22 is formed in the flow equalizing section 7, and the air outlet 22 is communicated with an air supply pipe 29.
Example 3
The energy-saving constant-temperature humidity-controlling air conditioning system for drying the precision casting shell, referring to the attached figure 2, comprises the following steps:
1. the air in the casting shop 28 is delivered to the air return section 1 through the air return pipe 27;
the air return section 1 is also communicated with external fresh air, so that the air quality of a workshop is improved, and the micro-positive pressure of the workshop can be kept;
the outlet of the air return section 1 is also communicated with a filtering section 2 to remove dust in a workshop;
the outlet of the filtering section 2 is also communicated with a front replacement hot section 3, and preliminary dehumidification is carried out through the front replacement hot section 3;
2. the air output from the air return section 1 is conveyed to the rotary wheel dehumidification section 4 for deep dehumidification, and as the regeneration area inlet 32 of the rotary wheel dehumidification section 4 is provided with the regeneration heater 9 and the regeneration area outlet 33 of the rotary wheel dehumidification section 4 is provided with the regeneration fan 10, the moisture absorbent in the rotary wheel regeneration area can be continuously regenerated, so that the rotary wheel dehumidification section 4 can be continuously provided with moisture absorption performance;
the regenerative heater 9 is connected with a heat recoverer 8, a regenerative fresh air inlet 30, a high-temperature side inlet 34 and a high-temperature side outlet 35 are arranged on the heat recoverer 8, wherein an outlet of a regenerative fan 10 is communicated with the high-temperature side inlet 34, the high-temperature side outlet 35 is connected with outdoor atmosphere, the regenerative fresh air enters the regenerative heater 9 after being preheated by the heat recoverer 8, high-temperature and high-humidity air from the regenerative fan 10 is input into the heat recoverer 8 through the high-temperature side inlet 34, and waste heat is used for preheating the regenerative fresh air, so that the inlet air temperature is increased;
3. the dehumidified air enters the rear replacement heat section 5 to be cooled, and the opening of the electric regulating valve 11 is controlled by the PLC, so that temperature regulation is realized;
4. the air after temperature reduction and humidity reduction is conveyed to a casting shop 28 through a fan section 6;
and a flow equalizing section 7 is also arranged between the fan section 6 and the casting shop 28, and the flow equalizing section 7 can reduce airflow disturbance and stably convey air to the casting shop 28.
Example 4
The temperature of a drying room of a shell manufacturing and drying company of Qingdao in the embodiment is required to be 22-24 ℃, and the humidity is 30-40%; the design parameters are that the temperature is 23 ℃, the humidity is 35 percent, and the moisture content is 6.9 g/kg; carrying out fresh air volume 600m plantation at 35 ℃ and moisture content of 24.3 g/kg; carrying out workshop air return 8400m for carrying out labor/hour, wherein the temperature of the mixed fresh air and the workshop air is 23.6 ℃, and the moisture content is 8.1 g/kg; the temperature of the mixed air after being treated by the front replacement hot section 3 is 13 ℃, and the moisture content is 8.1 g/kg; after dehumidification in the treatment area of the rotary wheel dehumidification section 4, the temperature is 30 ℃, and the moisture content is 3.1 g/kg; then the temperature is 16 ℃ after the treatment of the post-displacement hot section 5, and the moisture content is 3.1 g/kg; the treated drying air is sent to the drying room by the blower. The temperature of the regenerated fresh air is 35 ℃, the temperature of the regenerated fresh air is 58 ℃ after being heated by the heat recovery device 8, the regenerated fresh air is heated to 120 ℃ by the regenerative heater 9 and enters a rotating wheel regeneration area of the rotating wheel dehumidification section 4 to regenerate the rotating wheel moisture absorbent, the air temperature of an outlet 33 of the rotating wheel regeneration area is 70 ℃, the regenerated fresh air is conveyed to the heat recovery device 8 through the regenerative fan 10 to exchange heat with the regenerated fresh air, and the temperature of the regenerated exhaust air after heat exchange is 42 ℃.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An energy-saving constant-temperature humidity-control air conditioning system for drying shells produced by precision casting is characterized by comprising an energy-saving constant-temperature humidity-control unit for cooling and dehumidifying a casting workshop, wherein the energy-saving constant-temperature humidity-control unit comprises an air return section, a rotating wheel dehumidification section, a rear heat-exchange section and a fan section which are sequentially communicated from front to back, a regeneration heater is installed at an inlet of a regeneration area of the rotating wheel dehumidification section, a regeneration fan is installed at an outlet of a regeneration area of the rotating wheel dehumidification section, the air return section is communicated with an air return opening of the casting workshop through an air return pipe, a temperature and humidity sensor is installed on the air return pipe, the fan section is communicated with an air supply opening of the casting workshop through an air supply pipe, the rear heat-exchange section is communicated with refrigeration circulating water, a water inlet circulating pipeline communicated with a water inlet of the rear heat-exchange section and a water outlet circulating pipeline communicated with a water, an electric regulating valve, a regenerative heater, a regenerative fan, an electric regulating valve and a temperature and humidity sensor are all controlled by a PLC controller.
2. The energy-saving constant-temperature humidity-controlling air conditioning system for precision casting shell-making drying as claimed in claim 1, wherein the air return section is provided with an air inlet and a fresh air inlet, the air inlet is communicated with the air return pipe, and the fresh air inlet is communicated with external fresh air.
3. The energy-saving constant-temperature humidity-controlling air-conditioning system for drying the precision casting shells according to claim 1, wherein a filtering section and a front heat-exchanging section are sequentially arranged between the air return section and the rotating wheel dehumidification section from front to back, and the front heat-exchanging section is communicated with refrigeration circulating water.
4. The system of claim 3, wherein the regenerative heater is connected to a heat recovery unit having a fresh air inlet, a fresh air outlet, a high temperature side inlet, and a high temperature side outlet, wherein the outlet of the regeneration fan is connected to the high temperature side inlet, and the high temperature side outlet is connected to the outdoor atmosphere.
5. The energy-saving constant-temperature humidity-controlling air-conditioning system for drying the precision casting shells according to claim 1, wherein a flow equalizing section is further arranged between the fan section and the casting shop, an air outlet is formed in the flow equalizing section, and the air outlet is communicated with the blast pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020671375.1U CN212108865U (en) | 2020-04-28 | 2020-04-28 | Energy-saving constant-temperature humidity control air conditioning system for drying precision casting shell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457513A (en) * | 2020-04-28 | 2020-07-28 | 烟台泓麟制冷空调工程有限公司 | Energy-saving constant-temperature humidity-control air conditioning system for drying precision casting shell and temperature-control dehumidification method |
| CN113251512A (en) * | 2021-06-22 | 2021-08-13 | 河南励耕智能科技有限公司 | Energy recovery type constant temperature and humidity unit for low-humidity environment requirement occasion of storehouse |
-
2020
- 2020-04-28 CN CN202020671375.1U patent/CN212108865U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457513A (en) * | 2020-04-28 | 2020-07-28 | 烟台泓麟制冷空调工程有限公司 | Energy-saving constant-temperature humidity-control air conditioning system for drying precision casting shell and temperature-control dehumidification method |
| CN113251512A (en) * | 2021-06-22 | 2021-08-13 | 河南励耕智能科技有限公司 | Energy recovery type constant temperature and humidity unit for low-humidity environment requirement occasion of storehouse |
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