Energy-saving zero-gas-consumption combined low-dew-point dryer

Abstract

The utility model discloses an energy -saving zero gas consumption combined type low dew point drying -machine belongs to drying -machine technical field. An energy -saving zero gas consumption combined type low dew point drying -machine, including evaporimeter, heat exchanger, adsorption tower A and adsorption tower B, the inside of adsorption tower A and adsorption tower B all is provided with pressure measuring point and spot pressure gauge, and the bottom of adsorption tower A and adsorption tower B is provided with pipeline blow -off A and pipeline blow -off B respectively. To solve the existing combined equipment now can not complete satisfy the existing market to the energy consumption and performance requirement, such as no heat / micro -heat adsorption type drying -machine gas consumption is too big, the problem of excessive energy consumption, adopt variable frequency refrigeration compressor, this compressor can adjust compressor frequency according to load, thereby adjusting compressor energy consumption, can reduce energy consumption under low load working condition, and the variable frequency cold dryer and zero gas consumption air blower are combined, and the performance is better while energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, specifically to an energy-saving, zero-air-consumption, combined low-dew-point dryer. Background Technology

[0002] Existing equipment combines refrigerated dryers and heatless / micro-heated adsorption dryers into one unit or uses two units in series. However, this combination cannot meet the current market requirements for energy consumption and performance. For example, heatless / micro-heated adsorption dryers consume too much gas and energy. Most manufacturers of refrigerated dryers currently use non-environmentally friendly refrigerants, which cause some pollution to the environment. In addition, the outlet temperature of refrigerated dryers is too high for the optimal operating temperature of the adsorbent in adsorption dryers, which also affects the performance of the equipment. Utility Model Content

[0003] The purpose of this invention is to provide an energy-saving, zero-air-consumption combined low-dew-point dryer, which uses a variable frequency refrigeration compressor. This compressor can adjust its frequency according to the load, thereby adjusting the compressor's energy consumption. Under low-load conditions, energy consumption can be reduced. At the same time, the combination of the variable frequency refrigerated dryer and the zero-air-consumption blower reduces energy consumption while improving performance, thus solving the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving, zero-gas-consumption combined low-dew-point dryer, comprising an evaporator, a heat exchanger, an adsorption tower A, and an adsorption tower B. Pressure measuring points and local pressure gauges are installed inside both adsorption tower A and adsorption tower B. Drainage outlets A and B are respectively installed at the bottom of adsorption tower A and adsorption tower B. An exhaust silencer A and an exhaust silencer B are respectively installed on one side of exhaust silencer A and exhaust silencer B. A pressure relief ball valve A and a pressure relief ball valve B are respectively installed on one side of exhaust silencer A and exhaust silencer B. The dryer also includes pipeline one, pipeline two, and pipeline three. Among them, pipeline one includes eccentric butterfly valve one, eccentric butterfly valve three, and outlet check valve A; Pipeline 2 includes eccentric butterfly valve 2, eccentric butterfly valve 4, and outlet check valve B; Pipeline 3 includes eccentric butterfly valve 5, eccentric butterfly valve 6, eccentric butterfly valve 7, eccentric butterfly valve 8, eccentric butterfly valve 9, eccentric butterfly valve 10, and a balance ball valve. One end of eccentric butterfly valve 8 and eccentric butterfly valve 7 are respectively connected to a blower and a cooler. An air intake filter is installed between the cooler and the blower. The other end of eccentric butterfly valve 8 and eccentric butterfly valve 7 is connected to an electric heater. Temperature measuring points are installed at both the electric heater and eccentric butterfly valve 5.

[0005] Preferably, the outlet check valve A and outlet check valve B are connected to the air outlet, wherein a dew point meter is provided at the air outlet, and the air outlet is connected to a switch ball valve and a filter pressure reducing valve, wherein one end of the filter pressure reducing valve is connected to solenoid valve one and solenoid valve two.

[0006] Preferably, the heat exchanger is connected to eccentric butterfly valve one and eccentric butterfly valve two respectively, and an air pressure gauge is provided at the passage. The heat exchanger includes an air outlet and an air inlet, wherein the air outlet is connected to the evaporator.

[0007] Preferably, the evaporator and the heat exchanger are further connected by a gas-liquid separator. One end of the evaporator is connected to a vaporizer, which is connected to a variable frequency refrigeration compressor. The other end of the variable frequency refrigeration compressor is connected to the gas-liquid separator, which is connected to a condenser. The condenser is connected to the evaporator through a drying filter.

[0008] Preferably, a hot gas bypass valve is provided between the gas-liquid separator and the condenser, and a sight glass and an electronic expansion valve are provided between the dryer filter and the evaporator. The evaporator, the hot gas bypass valve, and the electronic expansion valve are connected to a temperature sensor.

[0009] Preferably, the dryer filter is connected to the high and low pressure controller, wherein a refrigerant pressure gauge is provided between the high and low pressure controller and the evaporator, and a refrigerant pressure gauge is provided between the high and low pressure controller and the dryer filter.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model adopts a variable frequency refrigeration compressor. This compressor can adjust the compressor frequency according to the load, thereby adjusting the compressor energy consumption. It can reduce energy consumption under low load conditions. At the same time, the variable frequency refrigerated dryer and the zero-air-consumption blower are combined to reduce energy consumption and improve performance.

[0011] 1. This utility model adopts a temperature control function. If the heating or cold blowing reaches the set temperature in advance during the equipment cycle, the heating and cold blowing time will be reduced. This will reduce the proportion of the usage time of the heater and blower during the cycle, thereby reducing the average energy consumption and achieving the effect of energy saving. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] In the diagram: 1. Eccentric butterfly valve one; 2. Eccentric butterfly valve two; 3. Eccentric butterfly valve three; 4. Eccentric butterfly valve four; 5. Eccentric butterfly valve five; 6. Eccentric butterfly valve six; 7. Eccentric butterfly valve seven; 8. Eccentric butterfly valve eight; 9. Eccentric butterfly valve nine; 10. Eccentric butterfly valve ten; 11. Pressure relief ball valve A; 12. Pressure relief ball valve B; 13. Balance ball valve; 14. Outlet check valve A; 15. Outlet check valve B; 16. On / off ball valve; 17. Filter pressure reducing valve; 18. Electric heater; 19. Blower; 20. Intake filter; 21. Cooler; 22. Adsorption tower A; 23. Adsorption tower B; 24. Exhaust silencer A; 25. Exhaust... 26. Silencer B; 27. Pipe drain outlet A; 28. Pipe drain outlet B; 29. ​​Variable frequency refrigeration compressor; 30. Gas-liquid separator; 31. Condenser; 32. Dryer filter; 33. Sight glass; 34. Electronic expansion valve; 35. Hot gas bypass valve; 36. Vaporizer; 37. Temperature sensor; 38. Evaporator; 39. Refrigerant pressure gauge one; 40. Refrigerant pressure gauge two; 41. High and low pressure controller; 42. Gas-liquid separator; 43. Air pressure gauge; 44. Heat exchanger; 45. Dew point meter; 46. Solenoid valve one; 47. Solenoid valve two; PG, Local pressure gauge; P, Pressure measuring point; TE, Temperature measuring point. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] To address the issue that existing combined equipment can no longer meet current market demands for energy consumption and performance, such as the excessive air consumption and energy consumption of heatless / micro-heat adsorption dryers; please refer to... Figure 1 The present invention provides the following solution: An energy-saving, zero-gas-consumption combined low-dew-point dryer includes an evaporator, a heat exchanger, an adsorption tower A22, and an adsorption tower B23. Pressure measuring points P and local pressure gauges PG are installed inside both adsorption towers A22 and B23. Drainage outlets A26 and B27 are respectively installed at the bottom of adsorption towers A22 and B23. Exhaust silencers A24 and B25 are respectively installed on one side of drain outlets A26 and B27. Pressure relief ball valves A11 and B12 are respectively installed on one side of exhaust silencers A24 and B25. The dryer also includes pipeline one, pipeline two, and pipeline three. Among them, pipeline one includes eccentric butterfly valve one 1, eccentric butterfly valve three 2, and outlet check valve A14; Pipeline 2 includes eccentric butterfly valve 2, eccentric butterfly valve 4, and outlet check valve B15; Pipeline 3 includes eccentric butterfly valve 5, eccentric butterfly valve 6, eccentric butterfly valve 7, eccentric butterfly valve 8, eccentric butterfly valve 9, eccentric butterfly valve 10, and balance ball valve 13. One end of eccentric butterfly valve 8 and eccentric butterfly valve 7 is connected to blower 19 and cooler 21, respectively. An air intake filter 20 is installed between cooler 21 and blower 19. The other end of eccentric butterfly valve 8 and eccentric butterfly valve 7 is connected to electric heater 18. Temperature measuring point TE is installed at both electric heater 18 and eccentric butterfly valve 5.

[0016] Air outlet check valves A14 and B15 are connected to the air outlet. A dew point meter 44 is installed at the air outlet. The air outlet is connected to a switch ball valve and a filter pressure reducing valve. One end of the filter pressure reducing valve is connected to solenoid valve 45 and solenoid valve 47.

[0017] The heat exchanger 43 is connected to eccentric butterfly valve 1 and eccentric butterfly valve 2 respectively, and an air pressure gauge 42 is installed at the passage. The heat exchanger 43 includes an air outlet and an air inlet, wherein the air outlet is connected to the evaporator 37.

[0018] Preferably, the evaporator 37 and the heat exchanger 43 are also connected by a gas-liquid separator 29. One end of the evaporator 37 is connected to the vaporizer 35, the vaporizer 35 is connected to the variable frequency refrigeration compressor 28, the other end of the variable frequency refrigeration compressor 28 is connected to the gas-liquid separator 29, and the gas-liquid separator 29 is connected to the condenser 30. The condenser 30 is connected to the evaporator 37 through a dryer filter 31.

[0019] A hot gas bypass valve 34 is provided between the gas-liquid separator 29 and the condenser 30, and a sight glass and an electronic expansion valve 33 are provided between the dryer filter 31 and the evaporator 37. The evaporator 37, the hot gas bypass valve 34 and the electronic expansion valve 33 are connected to the temperature sensor 36.

[0020] The dryer filter 31 is connected to the high and low pressure controller 40. A refrigerant pressure gauge 38 is installed between the high and low pressure controller 40 and the evaporator 37, and a refrigerant pressure gauge 39 is installed between the high and low pressure controller 40 and the dryer filter 31.

[0021] The operation flow of each mode is as follows: Shutdown procedure: Air inlet → Heat exchanger 42 (outside of heat exchange tube) → Evaporator 36 → Gas-liquid separator 29 → Heat exchanger 42 (inside of heat exchange tube) → Eccentric butterfly valve 1 / Eccentric butterfly valve 2 → Adsorption tower A22 / Adsorption tower B23 → Eccentric butterfly valve 14 / Eccentric butterfly valve 15 → Air outlet.

[0022] Device startup: Step 1: Regeneration delay in adsorption tower A22, adsorption stage in adsorption tower B23; Air inlet → Heat exchanger 42 (outer side of heat exchange tube) → Evaporator 36 → Gas-liquid separator 29 → Heat exchanger 42 (inner side of heat exchange tube) → Eccentric butterfly valve 2 → Adsorption tower B23 adsorption → Eccentric butterfly valve 15 → Air outlet.

[0023] Step 2: Depressurize adsorption tower A22, and begin adsorption in adsorption tower B23; When the eccentric butterfly valve 1 is opened, the adsorption tower A22 is depressurized through the exhaust silencer A24, and the adsorption tower B begins adsorption.

[0024] Air inlet → Heat exchanger 42 (outer side of heat exchange tube) → Evaporator 36 → Gas-liquid separator 29 → Heat exchanger 42 (inner side of heat exchange tube) → Eccentric butterfly valve 2 → Adsorption tower B23 adsorption → Eccentric butterfly valve 15 → Air outlet.

[0025] Step 3: Heating and regenerating adsorption tower A22, adsorption stage in adsorption tower B23; Adsorption flow: Air inlet → heat exchanger 42 (outer side of heat exchange tube) → evaporator 36 → gas-liquid separator 29 → heat exchanger 42 (inner side of heat exchange tube) → eccentric butterfly valve 2 → adsorption tower B23 → eccentric butterfly valve 15 → air outlet. Regeneration airflow: Atmosphere → Intake filter 20 → Blower 19 → Valve 7 → Electric heater 18 (open) → Valve 9 → Adsorption tower 22 for heating and regeneration → Eccentric butterfly valve 3 → Valve 5 → Atmosphere.

[0026] Step 4: Cooling down adsorption tower A22, adsorption stage in adsorption tower B23; Adsorption flow: Air inlet → heat exchanger 42 (outer side of heat exchange tube) → evaporator 36 → gas-liquid separator 29 → heat exchanger 42 (inner side of heat exchange tube) → eccentric butterfly valve 2 → adsorption tower B23 → eccentric butterfly valve 15 → air outlet. Cold airflow: Adsorption tower A22 → Valve 9 → Valve 8 → Cooler 21 → Blower 19 → Valve 6 → Eccentric butterfly valve 3 → Adsorption tower A22.

[0027] Step 5: Pressure replenishment in adsorption tower A22, adsorption stage in adsorption tower B23; Eccentric butterfly valve 13 opens, and adsorption tower A22 is pressurized; Adsorption airflow: Air inlet → Heat exchanger 42 (outside of heat exchange tube) → Evaporator 36 → Gas-liquid separator 29 → Heat exchanger 42 (inside of heat exchange tube) → Eccentric butterfly valve 2 → Adsorption tower B23 → Eccentric butterfly valve 15 → Air outlet.

[0028] Half-cycle end, equal pressure phase: Air inlet → Heat exchanger 42 (outside of heat exchange tube) → Evaporator 36 → Gas-liquid separator 29 → Heat exchanger 42 (inside of heat exchange tube) → Eccentric butterfly valve 1 / Eccentric butterfly valve 2 → Adsorption tower A22 / Adsorption tower B23 → Eccentric butterfly valve 14 / Eccentric butterfly valve 15 → Air outlet.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combined low dew point dryer with energy saving and zero gas consumption, characterized in that, The system includes an evaporator, a heat exchanger, an adsorption tower A, and an adsorption tower B. Pressure measuring points and local pressure gauges are installed inside both adsorption tower A and adsorption tower B. Drainage outlets A and B are respectively installed at the bottom of adsorption tower A and adsorption tower B. An exhaust silencer A and an exhaust silencer B are respectively installed on one side of exhaust silencer A and exhaust silencer B. Pressure relief ball valves A and B are respectively installed on one side of exhaust silencer A and exhaust silencer B. The system also includes pipeline one, pipeline two, and pipeline three. Among them, pipeline one includes eccentric butterfly valve one, eccentric butterfly valve three, and outlet check valve A; Pipeline 2 includes eccentric butterfly valve 2, eccentric butterfly valve 4, and outlet check valve B; Pipeline 3 includes eccentric butterfly valve 5, eccentric butterfly valve 6, eccentric butterfly valve 7, eccentric butterfly valve 8, eccentric butterfly valve 9, eccentric butterfly valve 10, and a balance ball valve. One end of eccentric butterfly valve 8 and eccentric butterfly valve 7 are respectively connected to a blower and a cooler. An air intake filter is installed between the cooler and the blower. The other end of eccentric butterfly valve 8 and eccentric butterfly valve 7 is connected to an electric heater. Temperature measuring points are installed at both the electric heater and eccentric butterfly valve 5.

2. The energy-saving zero-gas-consumption combined low-dew-point dryer according to claim 1, characterized in that: The air outlet check valve A and air outlet check valve B are connected to the air outlet. A dew point meter is installed at the air outlet. The air outlet is connected to a switch ball valve and a filter pressure reducing valve. One end of the filter pressure reducing valve is connected to the switch ball valve. One end of the filter pressure reducing valve is connected to solenoid valve one and solenoid valve two.

3. The energy-saving zero-gas-consumption combined low-dew-point dryer according to claim 1, characterized in that: The heat exchanger is connected to eccentric butterfly valve one and eccentric butterfly valve two respectively, and an air pressure gauge is installed at the passage. The heat exchanger includes an air outlet and an air inlet, wherein the air outlet is connected to the evaporator.

4. The energy-saving, zero-air-consumption, combined low-dew-point dryer according to claim 3, characterized in that: The evaporator and the heat exchanger are also connected by a gas-liquid separator. One end of the evaporator is connected to a vaporizer, which is connected to a variable frequency refrigeration compressor. The other end of the variable frequency refrigeration compressor is connected to the gas-liquid separator, which is connected to a condenser. The condenser is connected to the evaporator through a drying filter.

5. The energy-saving zero-gas-consumption combined low-dew-point dryer according to claim 4, characterized in that: A hot gas bypass valve is provided between the gas-liquid separator and the condenser, and a sight glass and an electronic expansion valve are provided between the dryer filter and the evaporator. The evaporator, the hot gas bypass valve, and the electronic expansion valve are connected to a temperature sensor.

6. The energy-saving, zero-air-consumption, combined low-dew-point dryer according to claim 5, characterized in that: The dryer filter is connected to the high and low pressure controller. A refrigerant pressure gauge is installed between the high and low pressure controller and the evaporator, and a refrigerant pressure gauge is installed between the high and low pressure controller and the dryer filter.

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