Efficient energy-saving type parallel freeze dryer

Abstract

The utility model discloses an efficient and energy-saving type parallel freeze dryer which comprises a compressor, a valve bank, an electronic expansion valve, a three-in-one heat exchanger, a gas-liquid separator and a hot gas bypass valve, a gas outlet of the compressor is sequentially connected with an oil separator and a condenser through a pipeline, and the inlet end of the valve bank is communicated with the tail end of the condenser. The inlet end of each electronic expansion valve is communicated with the outlet end of the valve group, the inlet of each three-in-one heat exchanger is communicated with the outlets of the electronic expansion valves in a one-to-one correspondence manner, the inlet end of the gas-liquid separator is communicated with the main outlet end of the three-in-one heat exchanger through a pipeline, and the outlet end of the gas-liquid separator is communicated with the gas inlet of the compressor; the inlet end of each hot gas bypass valve is communicated with a bypass outlet of the three-in-one heat exchanger in a one-to-one correspondence manner, and the outlet end of each hot gas bypass valve is communicated with a pipeline between the oil separator and the condenser. The heat exchange effect is improved, the energy consumption is reduced, the occupied area is reduced, and the cost is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of dryers, in particular to a high-efficiency energy-saving parallel freeze dryer. Background Art

[0002] In the field of compressed air post-processing, a common method is to install a refrigerated dryer at the outlet of the air compressor to dry and separate the moisture in the air so that the dew point of the treated compressed air meets the requirements of the gas-using equipment.

[0003] As an air post-treatment device, the refrigerated dryer is widely used in industrial sites. It cools the compressed air so that the water contained in the compressed air is condensed and separated by a steam-water separation device to produce dry compressed air. The existing refrigeration technology mainly forms the entire refrigeration cycle through a compressor-condenser-expansion valve-shell-and-tube evaporator-compressor. This method is bound to be unable to be made very large due to factors such as volume and cost. Therefore, the cooling capacity generated by the compressor cannot be fully utilized, and a large amount of cooling capacity is wasted with the discharge of cold air. In addition, for different compressed air processing capacities, since there is only a single evaporator, it can only be designed according to the maximum gas output. When the gas output decreases, the waste is even more serious. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide an efficient and energy-saving parallel freeze dryer, which can be freely combined to match different gas production volumes and reduce energy consumption. By combining the evaporator, heat exchanger, and gas-water separator into a three-in-one modular heat exchanger, the plate heat exchanger has a large unit heat exchange capacity, which improves the heat exchange effect, reduces energy consumption, reduces floor space, and greatly saves costs.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A high-efficiency and energy-saving parallel freeze dryer, comprising:

[0008] A compressor, wherein an air outlet of the compressor is sequentially connected to an oil separator and a condenser through pipelines;

[0009] A valve group, the inlet end of which is connected to the tail end of the condenser;

[0010] A plurality of electronic expansion valves are arranged in parallel, and the inlet end of each electronic expansion valve is connected to the outlet end of the valve group;

[0011] A plurality of three-in-one heat exchangers are arranged in parallel, and the inlet of each three-in-one heat exchanger is connected to the outlet of the electronic expansion valve in a one-to-one correspondence;

[0012] A gas-liquid separator, the inlet end of which is connected to the main outlet end of the three-in-one heat exchanger through a pipeline, and the outlet end of which is connected to the air inlet of the compressor;

[0013] A plurality of hot gas bypass valves are arranged in parallel, and the inlet end of each hot gas bypass valve is connected to the bypass outlet of the three-in-one heat exchanger in a one-to-one correspondence, and the outlet end is connected to the pipeline between the oil separator and the condenser.

[0014] As a preferred solution of the high-efficiency and energy-saving parallel freeze dryer described in the utility model, the valve group includes a manual ball valve, a drying filter, a solenoid valve and a sight glass which are sequentially connected through pipelines.

[0015] As a preferred solution of the high-efficiency and energy-saving parallel freeze dryer described in the utility model, the three-in-one heat exchanger includes an evaporator, a heat exchanger, and a gas-water separator which are sequentially connected through pipelines.

[0016] As a preferred solution of the high-efficiency and energy-saving parallel freeze dryer described in the utility model, the outlet of the evaporator is provided with a first temperature sensor, the refrigerant return port is provided with a second temperature sensor, and the refrigerant outlet of the condenser is provided with a pressure sensor and a dew point temperature sensor;

[0017] The return water port of the condenser is connected to a water flow regulating valve through a pipeline, and the inlet of the three-in-one heat exchanger is provided with an air intake regulating valve. The water flow regulating valve, the air intake regulating valve and the electronic expansion valve are all electrically connected to the main controller.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the utility model adopts a parallel method to evenly distribute the air intake flow of a large-capacity refrigerated dryer, and distributes it to multiple three-in-one heat exchanger modules for air separation treatment. It is designed in a modular way and can be freely combined to match different gas production volumes. In addition, by combining the evaporator, heat exchanger, and gas-water separator into a three-in-one modular heat exchanger, the plate heat exchanger has a large unit heat exchange capacity, which improves the heat exchange effect, reduces energy consumption, reduces floor space, and greatly saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 This is a structural schematic diagram of a high-efficiency and energy-saving parallel freeze dryer of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the air intake regulating valve connected to the three-in-one heat exchanger of a high-efficiency energy-saving parallel freeze dryer of the utility model;

[0022] Figure 3 This is a connection diagram of a master controller of a high-efficiency energy-saving parallel freeze dryer of the utility model and a first temperature sensor, a second temperature sensor, a dew point temperature sensor, a water volume regulating valve, an air intake regulating valve and an electronic expansion valve. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0024] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] The utility model provides a high-efficiency and energy-saving parallel freeze dryer, which can be freely combined to match different gas production volumes, reducing energy consumption. By combining the evaporator, heat exchanger, and gas-water separator into a three-in-one modular heat exchanger, the plate heat exchanger has a large unit heat exchange capacity, which improves the heat exchange effect, reduces energy consumption, reduces floor space, and greatly saves costs.

[0027] Figure 1-Figure 3 The schematic diagram of the structure of an embodiment of a high-efficiency energy-saving parallel freeze dryer of the utility model is shown in FIG. Figure 1-Figure 3The present embodiment is a high-efficiency and energy-saving parallel freeze dryer, the main body of which includes a compressor 100, a valve group 200, an electronic expansion valve 300, a three-in-one heat exchanger 400, a gas-liquid separator 500 and a hot gas bypass valve 600.

[0028] The air outlet of the compressor 100 is sequentially connected to an oil separator 110 and a condenser 120 through pipelines;

[0029] The inlet end of the valve group 200 is connected to the tail end of the condenser 120. In this embodiment, the valve group 200 includes a manual ball valve 210, a drying filter 220, a solenoid valve 230 and a sight glass 240 which are sequentially connected through pipelines.

[0030] A plurality of electronic expansion valves 300 are arranged in parallel, and the inlet end of each electronic expansion valve 300 is connected to the outlet end of the valve group 200;

[0031] There are multiple three-in-one heat exchangers 400 arranged in parallel. In this embodiment, 8 are specifically arranged, and the inlet of each three-in-one heat exchanger 400 is connected to the outlet of the electronic expansion valve 300 in a one-to-one correspondence. The three-in-one heat exchanger 400 includes an evaporator, a heat exchanger, and a gas-water separator which are connected in sequence through pipelines. The utility model utilizes the three-in-one heat exchanger 400, that is, the evaporator, the heat exchanger, and the gas-water separator are three-in-one, to evenly distribute the intake air flow of a large-capacity refrigerated dryer, and distribute it to multiple three-in-one heat exchangers for air separation treatment. The heat exchanger adopts a plate heat exchanger, and the heat exchange efficiency is higher than that of a shell-and-tube heat exchanger, which greatly reduces the size of a single heat exchanger. The total volume can be saved by more than one-third compared with the traditional design scheme, and the cost is lower. In addition, the three-in-one heat exchanger 400 can increase the heat exchange area of ​​the regenerator, so that the cooling capacity of the compressor is fully utilized, the refrigeration efficiency is improved, and the energy consumption is reduced;

[0032] The inlet end of the gas-liquid separator 500 is connected to the main outlet end of the three-in-one heat exchanger 400 through a pipeline, and the outlet end is connected to the air inlet of the compressor 100;

[0033] There are multiple hot gas bypass valves 600 arranged in parallel, and the inlet end of each hot gas bypass valve 600 is connected to the bypass outlet of the three-in-one heat exchanger 400 in a one-to-one correspondence, and the outlet end is connected to the pipeline between the oil separator 110 and the condenser 120.

[0034] Moreover, in this embodiment, the outlet of the evaporator is provided with a first temperature sensor, the refrigerant return port is provided with a second temperature sensor, and the refrigerant outlet of the condenser 120 is provided with a pressure sensor and a dew point temperature sensor;

[0035] The return water port of the condenser 120 is connected to the water regulating valve 120a through a pipeline, and the inlet of the three-in-one heat exchanger 400 is provided with an air intake regulating valve 400a. The water regulating valve 120a, the air intake regulating valve 400a and the electronic expansion valve 300 are all electrically connected to the main controller 700. The compressed air inlet and outlet system adopts a one-to-eight distribution type. The air intake regulating valve 400a is installed at the air inlet of each module. The opening of the air intake regulating valve 400a is adjusted according to different gas production to adapt to different gas production processing conditions.

[0036] The air intake regulating valve 400a and the water volume regulating valve 120a can prevent the condensed water from being overcooled and frozen in the case of excessive cooling, thereby preventing the evaporator from being damaged by ice inside the evaporator and protecting the heat exchanger. The main controller 700 collects the evaporator outlet air temperature, the evaporator refrigerant return air temperature, the condenser refrigerant outlet temperature, and the dew point temperature in real time. These key temperatures are processed by the main controller 700 and can be adjusted in time to adjust the electronic expansion valve 300, the air intake regulating valve 400a and the water volume regulating valve 120a, so that the entire refrigeration system can operate in the best condition, thereby protecting the system safety and reducing energy consumption.

[0037] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-efficiency and energy-saving parallel freeze dryer, characterized in that: include: A compressor (100), wherein an air outlet of the compressor (100) is sequentially connected to an oil separator (110) and a condenser (120) via pipelines; A valve group (200), the inlet end of which is in communication with the rear end of the condenser (120); A plurality of electronic expansion valves (300) are arranged in parallel, and the inlet end of each electronic expansion valve (300) is in communication with the outlet end of the valve group (200); A plurality of three-in-one heat exchangers (400) are arranged in parallel, and the inlet of each three-in-one heat exchanger (400) is connected to the outlet of the electronic expansion valve (300) in a one-to-one correspondence; A gas-liquid separator (500), the inlet end of which is in communication with the main outlet end of the three-in-one heat exchanger (400) via a pipeline, and the outlet end of which is in communication with the air inlet of the compressor (100); A plurality of hot gas bypass valves (600) are arranged in parallel, and the inlet end of each hot gas bypass valve (600) is connected to a bypass outlet of the three-in-one heat exchanger (400) in a one-to-one correspondence, and the outlet end is connected to a pipeline between the oil separator (110) and the condenser (120).

2. A high-efficiency energy-saving parallel freeze dryer according to claim 1, characterized in that: The valve group (200) comprises a manual ball valve (210), a drying filter (220), a solenoid valve (230), and a sight glass (240) which are sequentially connected via a pipeline.

3. A high-efficiency energy-saving parallel freeze dryer according to claim 1, characterized in that: The three-in-one heat exchanger (400) comprises an evaporator, a heat exchanger, and a gas-water separator which are sequentially connected via pipelines.

4. A high-efficiency energy-saving parallel freeze dryer according to claim 3, characterized in that: The outlet of the evaporator is provided with a first temperature sensor, the refrigerant return port is provided with a second temperature sensor, and the refrigerant outlet of the condenser (120) is provided with a pressure sensor and a dew point temperature sensor; The water return port of the condenser (120) is connected to a water volume regulating valve (120a) via a pipeline, and the inlet of the three-in-one heat exchanger (400) is provided with an air intake regulating valve (400a). The water volume regulating valve (120a), the air intake regulating valve (400a) and the electronic expansion valve (300) are all electrically connected to the main controller (700).

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