Full-automatic dewatering device controlled by PLC (Programmable Logic Controller)

Abstract

The utility model relates to the field of gas dehydration treatment, in particular to a full-automatic dehydration device controlled by a PLC (Programmable Logic Controller). Comprising a main air inlet pipe and a main exhaust pipe, a first equipment tower and a second equipment tower which are connected in parallel are arranged between the main air inlet pipe and the main exhaust pipe through a pipeline, a first communicating pipeline is arranged between the air inlet ends of the first equipment tower and the second equipment tower, and a second communicating pipeline is arranged between the exhaust ends of the first equipment tower and the second equipment tower; and a liquid level detection element is arranged on the liquid-gas separator and is connected with a PLC (Programmable Logic Controller) control system. According to the technical scheme, the PLC control system is mainly adopted to control the pneumatic or electric valve to act according to a set time program or an exhaust dew point signal, so that the adsorption tower and the regeneration tower are automatically switched, and the switching process of the adsorption tower and the regeneration tower is completed; according to a liquid level signal detected by the liquid level transmitter, the control of the automatic blow-down valve is realized through the PLC control system, and the purpose of automatically discharging sewage according to the liquid level is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas dehydration treatment field, concretely relates to a full automatic dehydration device of PLC control. BACKGROUND

[0002] In the natural gas dehydration treatment industry, with the large-scale of equipment and the diversification of requirements, manual operation valve appears more and more laborious and inconvenient, for this, more and more customers require to improve the degree of automation of equipment, and the automatic equipment can avoid the situation of manual operation failure, improve the efficiency of production. CONTENT OF UTILITY MODEL

[0003] The utility model intends to provide a full automatic dehydration device of PLC control that can realize automatic switching, automatic regeneration and automatic blowdown process.

[0004] The full automatic dehydration device of PLC control in the scheme, including main inlet pipe and main exhaust pipe, be equipped with the first equipment tower and the second equipment tower in parallel between the main inlet pipe and the main exhaust pipe through pipeline, the first equipment tower and the second equipment tower both ends are connected main inlet pipe and main exhaust pipe respectively, the first equipment tower and the second equipment tower's air inlet end between close to the main inlet pipe one end is equipped with the first communication pipeline, the first equipment tower and the second equipment tower's exhaust end between close to the main exhaust pipe one end is equipped with the second communication pipeline, the first communication pipeline connects one end of liquid gas separator, the other end of liquid gas separator connects the second communication pipeline, liquid gas separator is connected blowdown mouth through blowdown pipeline, be equipped with liquid level detection element on liquid gas separator, liquid level detection element signal is connected with PLC control system.

[0005] Further, the blowdown pipeline is provided with a blowdown valve, and the blowdown valve is also signal connected to the PLC control system.

[0006] Further, an electric heater is arranged on the pipeline between the liquid gas separator and the second communication pipeline.

[0007] Further, a regeneration gas compressor is further arranged on the pipeline between the liquid gas separator and the electric heater. The main function of the regeneration gas compressor is to overcome the resistance of the circulating flow of the regeneration gas in the circulating pipeline, provide the power for the continuous circulation of the regeneration gas, so that the regeneration process can be continuously carried out until completion.

[0008] Further, a first valve is arranged on the pipeline between the main inlet pipe and the first equipment tower, a second valve is arranged on the pipeline between the main inlet pipe and the second equipment tower, a third valve and a fourth valve are arranged on the first communication pipeline, and the pipeline connecting the liquid gas separator and the first communication pipeline is arranged between the third valve and the fourth valve.

[0009] Furthermore, the third valve is located near the first equipment tower, and the fourth valve is located near the second equipment tower.

[0010] Furthermore, a fifth valve is provided in the pipeline between the main exhaust pipe and the first equipment tower, a sixth valve is provided in the pipeline between the main exhaust pipe and the second equipment tower, a seventh valve and an eighth valve are provided in the second connecting pipeline, and the pipeline connecting the liquid-gas separator to the second connecting pipeline is located between the seventh valve and the eighth valve.

[0011] Furthermore, the seventh valve is located near the first equipment tower, and the eighth valve is located near the second equipment tower.

[0012] Furthermore, the first valve, the second valve, the third valve, and the fourth valve are also signal-connected to the PLC control system.

[0013] This technical solution uses PLC to control the automatic switching, automatic regeneration, and automatic sewage discharge processes of the dewatering equipment, replacing manual valve operation by workers. This facilitates fully automatic operation of the equipment, reduces the workload of operators, avoids human error, improves the automation level of the equipment, and enables unattended operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a PLC-controlled fully automatic dehydration device according to the present invention.

[0015] In the diagram, 1 is the main intake pipe, 2 is the main exhaust pipe, 3 is the first equipment tower, 4 is the second equipment tower, 5 is the regenerated gas compressor, 6 is the first connecting pipe, 7 is the second connecting pipe, 8 is the liquid-gas separator, 9 is the sewage pipe, 10 is the sewage outlet, 11 is the sewage valve, 12 is the liquid level detection element, 13 is the PLC control system, 14 is the electric heater, 21 is the first valve, 22 is the second valve, 23 is the third valve, 24 is the fourth valve, 25 is the fifth valve, 26 is the sixth valve, 27 is the seventh valve, and 28 is the eighth valve. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] according to Figure 1 As shown, a PLC-controlled fully automatic dehydration device in this solution includes a main air inlet pipe 1 and a main exhaust pipe 2. A first equipment tower 3 and a second equipment tower 4 are connected in parallel through a pipeline between the main air inlet pipe 1 and the main exhaust pipe 2. The two ends of the first equipment tower 3 and the second equipment tower 4 are respectively connected to the main air inlet pipe 1 and the main exhaust pipe 2.

[0018] A first communication pipeline 6 is arranged between the first equipment tower 3 and the second equipment tower 4 near one end of the main air inlet pipe 1, and a second communication pipeline 7 is arranged between the first equipment tower 3 and the second equipment tower 4 near one end of the main air outlet pipe 2.

[0019] One end of the first communication pipeline 6 is connected to a liquid-gas separator 8, the other end of the liquid-gas separator 8 is connected to the second communication pipeline 7, the liquid-gas separator 8 is connected to a blowdown port 10 through a blowdown pipeline 9, and a blowdown valve 11 is arranged on the blowdown pipeline 9. A liquid level detection element 12 is arranged on the liquid-gas separator 8, and the liquid level detection element 12 is signal connected to a PLC control system 13. The blowdown valve 11 is also signal connected to the PLC control system 13. The liquid level signal detected by the liquid level detection element 12 controls the action of the blowdown valve 11 through the PLC control system 13, so as to achieve the purpose of automatic blowdown.

[0020] In this embodiment, an electric heater 14 is arranged on the pipeline between the liquid-gas separator 8 and the second communication pipeline 7. A regenerative gas compressor 5 is also arranged on the pipeline between the liquid-gas separator 8 and the electric heater 14. The main function of the regenerative gas compressor is to overcome the resistance of the regenerative gas circulating in the circulating pipeline, provide power for the continuous circulation of the regenerative gas, and enable the regeneration process to continue until completion.

[0021] A first valve 21 is arranged on the pipeline between the main air inlet pipe 1 and the first equipment tower 3, a second valve 22 is arranged on the pipeline between the main air inlet pipe 1 and the second equipment tower 4, a third valve 23 and a fourth valve 24 are arranged on the first communication pipeline 6, and the pipeline connecting the liquid-gas separator 8 and the first communication pipeline 6 is arranged between the third valve 23 and the fourth valve 24. Among them, the third valve 23 is close to the first equipment tower 3, and the fourth valve 24 is close to the second equipment tower 4. The first valve 21, the second valve 22, the third valve 23 and the fourth valve 24 are also controlled by the PLC control system 13.

[0022] In this embodiment, the first valve 21, the second valve 22, the third valve 23 and the fourth valve 24 are combined into an automatic switching valve group, and the PLC control system 13 controls the action of the automatic switching valve group according to the time period or the exhaust dew point signal set by the program, to complete the conversion process between the adsorption tower and the regeneration tower of the first equipment tower 3 and the second equipment tower 4.

[0023] A fifth valve 25 is arranged on the pipeline between the main air outlet pipe 2 and the first equipment tower 3, a sixth valve 26 is arranged on the pipeline between the main air outlet pipe 2 and the second equipment tower 4, a seventh valve 27 and an eighth valve 28 are arranged on the second communication pipeline 7, and the pipeline connecting the liquid-gas separator 8 and the second communication pipeline 7 is arranged between the seventh valve 27 and the eighth valve 28. Among them, the seventh valve 27 is close to the first equipment tower 3, and the eighth valve 28 is close to the second equipment tower 4.

[0024] The technical scheme mainly adopts the PLC control system 13 to control the pneumatic or electric valve to act according to the set time program or the exhaust dew point signal, so that the conversion process of the adsorption tower and the regeneration tower is completed; and the PLC control system 13 is used to control the automatic blowdown valve 11 according to the liquid level signal detected by the liquid level transmitter, so that the purpose of automatically blowing down according to the liquid level is achieved.

[0025] The above is only the embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. A PLC-controlled fully automatic dewatering device, comprising a main air inlet pipe and a main air outlet pipe, a first equipment tower and a second equipment tower being connected in parallel between the main air inlet pipe and the main air outlet pipe through a pipeline, two ends of the first equipment tower and the second equipment tower being connected with the main air inlet pipe and the main air outlet pipe respectively, characterized in that: First connecting pipeline is arranged between the gas inlet end of the first equipment tower and the second equipment tower close to one end of the main gas inlet pipe, and second connecting pipeline is arranged between the gas outlet end of the first equipment tower and the second equipment tower close to one end of the main gas outlet pipe; one end of the first connecting pipeline is connected with a liquid-gas separator, the other end of the liquid-gas separator is connected with the second connecting pipeline, and the liquid-gas separator is connected with a blowdown opening through a blowdown pipeline; a liquid level detection element is arranged on the liquid-gas separator, and the liquid level detection element is signal connected with a PLC control system.

2. The PLC-controlled fully-automatic dewatering device according to claim 1, characterized in that: A blowdown valve is arranged on the blowdown pipeline, and the blowdown valve is also signal connected with the PLC control system.

3. The PLC-controlled fully-automatic dewatering device according to claim 2, characterized in that: An electric heater is arranged on the pipeline between the liquid-gas separator and the second connecting pipeline.

4. The PLC-controlled fully-automatic dewatering device according to claim 3, characterized in that: A regeneration gas compressor is further arranged on the pipeline between the liquid-gas separator and the electric heater.

5. The PLC controlled fully automatic dewatering device according to claim 1, characterized in that: A first valve is arranged on the pipeline between the main gas inlet pipe and the first equipment tower, a second valve is arranged on the pipeline between the main gas inlet pipe and the second equipment tower, a third valve and a fourth valve are arranged on the first connecting pipeline, and the pipeline, in which the liquid-gas separator is connected with the first connecting pipeline, is arranged between the third valve and the fourth valve.

6. The PLC controlled fully automatic dewatering device according to claim 5, characterized in that: The third valve is close to the first equipment tower, and the fourth valve is close to the second equipment tower.

7. The PLC controlled fully automatic dewatering device according to claim 1, characterized in that: A fifth valve is arranged on the pipeline between the main gas outlet pipe and the first equipment tower, a sixth valve is arranged on the pipeline between the main gas outlet pipe and the second equipment tower, a seventh valve and an eighth valve are arranged on the second connecting pipeline, and the pipeline, in which the liquid-gas separator is connected with the second connecting pipeline, is arranged between the seventh valve and the eighth valve.

8. The PLC controlled fully automatic dewatering device according to claim 7, characterized in that: The seventh valve is close to the first equipment tower, and the eighth valve is close to the second equipment tower.

9. The PLC controlled fully automatic dewatering device according to claim 5, characterized in that: The first valve, the second valve, the third valve and the fourth valve are also signal connected with the PLC control system.

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