Three-tower isobaric drying device

Abstract

The three-tower isobaric drying device comprises a first dryer, a second dryer and a third dryer which are connected in parallel, an adsorption line; an adsorption exhaust line; a heating line; a drying regeneration heating line; a drying regeneration cooling separation line; the other end of the drying regeneration cooling separation line is connected with a drying regeneration cooler, the drying regeneration cooler is connected with an inlet of a drying regeneration separator, a liquid phase outlet of the drying regeneration separator is connected with a water outlet, and a gas phase outlet of the drying regeneration separator is connected with the other end of the adsorption line. The three-tower isobaric drying device can continuously work for 24 hours, the whole drying process is automatic, the water content in the dried feed gas is low, and the three-tower isobaric drying device has the advantage of high working efficiency and can meet the efficiency requirements of upstream and downstream treatment procedures.

Description

Technical Field

[0001] The present invention relates to purification and dehydration of industrial gases, in particular to a three-tower isobaric drying device. Background Art

[0002] Industrial production often requires the removal and purification of moisture from raw gas. Existing domestic gas drying is typically accomplished using drying towers. However, these towers must undergo heating and cooling processes after a period of adsorption, preventing continuous gas drying. This severely impacts the efficiency of upstream and downstream processing steps. Utility Model Content

[0003] The purpose of the utility model is to provide a three-tower isobaric drying device which can work uninterruptedly.

[0004] The three-tower isobaric drying device of the utility model comprises:

[0005] A first dryer, a second dryer, and a third dryer connected in parallel;

[0006] an adsorption line, one end of which is connected to a source of raw gas, the adsorption line being connected to the bottom pores of the first dryer through a first branch, to the bottom pores of the second dryer through a second branch, and to the bottom pores of the third dryer through a third branch;

[0007] an adsorption exhaust line, wherein the adsorption exhaust line is connected to the top air hole of the first dryer through a fourth branch, connected to the top air hole of the second dryer through a fifth branch, and connected to the top air hole of the third dryer through a sixth branch;

[0008] a heating circuit, one end of which is connected to a source of raw gas, the heating circuit being connected to the bottom pore of the first dryer through a seventh branch, to the bottom pore of the second dryer through an eighth branch, and to the bottom pore of the third dryer through a ninth branch;

[0009] a drying regeneration heating circuit, the drying regeneration heating circuit comprising a drying regeneration heater, the inlet of the drying regeneration heater being connected to the top air hole of the first dryer through a tenth branch, the top air hole of the second dryer through an eleventh branch, and the top air hole of the third dryer through a twelfth branch, and the outlet of the drying regeneration heater being connected to the top air hole of the first dryer through a thirteenth branch, the top air hole of the second dryer through a fourteenth branch, and the top air hole of the third dryer through a fifteenth branch;

[0010] a drying, regeneration and cooling separation circuit, one end of which is connected to the bottom air hole of the first dryer through a sixteenth branch, to the bottom air hole of the second dryer through a seventeenth branch, and to the bottom air hole of the third dryer through an eighteenth branch;

[0011] The other end of the drying regeneration cooling separation line is connected to the drying regeneration cooler, the drying regeneration cooler is connected to the inlet of the drying regeneration separator, the liquid phase outlet of the drying regeneration separator is connected to the water outlet, and the gas phase outlet of the drying regeneration separator is connected to the other end of the adsorption line.

[0012] The utility model discloses a three-tower isobaric drying device, wherein a flow regulating valve is provided on the adsorption line, a feed valve is provided on the first branch, the second branch and the third branch respectively, and an outlet valve is provided on the fourth branch, the fifth branch and the sixth branch respectively.

[0013] The utility model discloses a three-tower isobaric drying device, wherein the seventh branch road, the eighth branch road, the ninth branch road, the tenth branch road, the eleventh branch road and the twelfth branch road are respectively provided with program-controlled valves.

[0014] The utility model discloses a three-tower isobaric drying device, wherein the thirteenth branch road, the fourteenth branch road, the fifteenth branch road, the sixteenth branch road, the seventeenth branch road and the eighteenth branch road are respectively provided with program-controlled valves.

[0015] The three-tower isobaric drying device of the utility model is characterized in that a flow meter is provided on the heating circuit.

[0016] The three-tower isobaric drying device of the present invention can achieve 24-hour uninterrupted operation. When one dryer is adsorbing, the other two dryers are heating and cooling. The three dryers operate in turn. The adsorption cycle of each dryer is eight hours. The entire drying process is automated. The water content in the dried raw gas is less than 1ppm. It has the advantage of high working efficiency and can meet the efficiency requirements of upstream and downstream processing procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the three-tower isobaric drying device of the present utility model. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, the three-tower isobaric drying device of the present invention comprises:

[0019] A first dryer 101, a second dryer 102, and a third dryer 103 connected in parallel;

[0020] An adsorption line 51, one end of which is connected to a raw gas source, and the adsorption line is connected to the bottom pores of the first dryer 101 through a first branch 1, to the bottom pores of the second dryer through a second branch 2, and to the bottom pores of the third dryer through a third branch 3;

[0021] an adsorption exhaust line 52, which is connected to the top air hole of the first dryer through the fourth branch 4, to the top air hole of the second dryer through the fifth branch 5, and to the top air hole of the third dryer through the sixth branch 6;

[0022] A heating circuit 53, one end of which is connected to the raw gas source, and the heating circuit is connected to the bottom pore of the first dryer through the seventh branch 7, to the bottom pore of the second dryer through the eighth branch 8, and to the bottom pore of the third dryer through the ninth branch 9;

[0023] a drying regeneration heating circuit 54, comprising a drying regeneration heater 71, the inlet of which is connected to the top air hole of the first dryer via a tenth branch 10, to the top air hole of the second dryer via an eleventh branch 11, and to the top air hole of the third dryer via a twelfth branch 12; and an outlet of the drying regeneration heater is connected to the top air hole of the first dryer via a thirteenth branch 13, to the top air hole of the second dryer via a fourteenth branch 14, and to the top air hole of the third dryer via a fifteenth branch 15;

[0024] A drying, regeneration and cooling separation line 55, one end of which is connected to the bottom air hole of the first dryer through the sixteenth branch line 16, to the bottom air hole of the second dryer through the seventeenth branch line 17, and to the bottom air hole of the third dryer through the eighteenth branch line 18;

[0025] The other end of the dry regeneration cooling separation line is connected to the dry regeneration cooler 72, the dry regeneration cooler is connected to the inlet of the dry regeneration separator 73, the liquid phase outlet of the dry regeneration separator is connected to the water outlet, and the gas phase outlet of the dry regeneration separator is connected to the other end of the adsorption line.

[0026] The three-tower isobaric drying device of the present invention is provided with a flow regulating valve 300 on the adsorption line 51, a feed valve 900 is provided on the first branch, the second branch and the third branch respectively, and an outlet valve 800 is provided on the fourth branch, the fifth branch and the sixth branch respectively.

[0027] In the three-tower equal-pressure drying device of the present invention, program-controlled valves 200 are respectively provided on the seventh branch road, the eighth branch road, the ninth branch road, the tenth branch road, the eleventh branch road, and the twelfth branch road.

[0028] In the three-tower equal-pressure drying device of the present invention, program-controlled valves 200 are respectively provided on the thirteenth branch road, the fourteenth branch road, the fifteenth branch road, the sixteenth branch road, the seventeenth branch road, and the eighteenth branch road.

[0029] In the three-tower isobaric drying device of the present invention, a flow meter 400 is provided on the heating circuit.

[0030] The main equipment of the three-tower isobaric drying device of the utility model includes: a heat exchanger, a dryer, a separator and related valves and pipelines.

[0031] When the three-tower isobaric drying device of the utility model is in operation, while one dryer is in the adsorption process, the other two dryers are heating and cooling. The three dryers operate in turn, and the adsorption cycle of each dryer is 8 hours. The entire drying process is implemented by automatic switching of the program-controlled valve to achieve continuous operation. The water content in the raw gas after drying is less than 1ppm.

[0032] The dryer is filled with adsorbent.

[0033] The adsorbent can be activated carbon, molecular sieve, or silica gel.

[0034] The adsorption process is automatically controlled by a programmable valve.

[0035] The three-tower isobaric drying device of the utility model is used not only for drying and dehydrating, but also for removing gas impurities such as carbon dioxide, hydrocarbons and other components from the gas.

[0036] The three-tower isobaric drying device of the utility model is particularly suitable for the purification and dehydration process of industrial gases.

[0037] When one dryer is in the adsorption process, the other two dryers are heating and cooling. The three dryers operate in turn. The adsorption cycle of each dryer is 8 hours. The entire drying process is implemented by the program-controlled valve to automatically switch to achieve continuous operation. The water content of the dried raw gas is less than 1ppm. Taking the first dryer as an example, its working process is described as follows:

[0038] a) Adsorption process: The raw gas enters the first dryer from the bottom through the flow regulating valve and the program-controlled valve. Under the selective adsorption of the adsorbent, the moisture in the gas is adsorbed. The dry gas flows out from the top of the equipment and enters the next process through the program-controlled valve. The adsorption process lasts for 8 hours.

[0039] After the adsorption process is completed, the raw gas feed valve and outlet valve are automatically closed, the adsorption stops, and the dryer begins to enter the regeneration process.

[0040] b) Heating process: The regenerated gas enters the dryer through the flow meter and program-controlled valve. After being dehydrated by the dryer, the regenerated gas passes through the program-controlled valve to dry the regeneration heater. The dryer is hot-blown through the heater through the program-controlled valve. The high-temperature regenerated gas releases the moisture adsorbed by the molecular sieve and enters the drying regeneration cooler from the bottom of the equipment through the program-controlled valve together with the regenerated gas. After being cooled to 40°C by the cooler, it enters the drying regeneration separator. The separated liquid phase is discharged from the bottom of the separator and then sent out of the boundary area; the gas phase is discharged from the top of the separator and enters the inlet pipeline of the dryer to mix with the raw gas. When the temperature of the regenerated gas out of the bottom of the dryer reaches 180°C, the heating process is completed. The heating process takes about 4 hours.

[0041] c) Cooling Process: After the dryer heating process is complete, the cooling process begins. Regeneration gas flows through a flow meter and a program-controlled valve into the dryer, cooling the dryer. The regeneration gas then flows through a program-controlled valve from the top of the equipment into the dryer regeneration heater, where it flows through the heater into the dryer, providing a hot blow to the dryer. The cooling process is complete when the temperature of the regeneration gas at the top of the dryer reaches approximately 40°C. This process takes approximately four hours.

[0042] The entire drying process is automatically switched by a program-controlled valve according to the program. The operator can adjust the program time to control the drying process. After these steps, the dryer has completed a complete "adsorption-regeneration" cycle and is ready for the next adsorption.

[0043] The three-tower isobaric drying device of the present invention can achieve 24-hour uninterrupted operation. When one dryer is adsorbing, the other two dryers are heating and cooling. The three dryers operate in turn. The adsorption cycle of each dryer is eight hours. The entire drying process is automated. The water content in the dried raw gas is less than 1ppm. It has the advantage of high working efficiency and can meet the efficiency requirements of upstream and downstream processing procedures.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A three-tower isobaric drying device, characterized in that: include: A first dryer, a second dryer, and a third dryer connected in parallel; an adsorption line, one end of which is connected to a source of raw gas, the adsorption line being connected to the bottom pores of the first dryer through a first branch, to the bottom pores of the second dryer through a second branch, and to the bottom pores of the third dryer through a third branch; an adsorption exhaust line, wherein the adsorption exhaust line is connected to the top air hole of the first dryer through a fourth branch, connected to the top air hole of the second dryer through a fifth branch, and connected to the top air hole of the third dryer through a sixth branch; a heating circuit, one end of which is connected to a source of raw gas, the heating circuit being connected to the bottom pore of the first dryer through a seventh branch, to the bottom pore of the second dryer through an eighth branch, and to the bottom pore of the third dryer through a ninth branch; a drying regeneration heating circuit, the drying regeneration heating circuit comprising a drying regeneration heater, the inlet of the drying regeneration heater being connected to the top air hole of the first dryer through a tenth branch, the top air hole of the second dryer through an eleventh branch, and the top air hole of the third dryer through a twelfth branch, and the outlet of the drying regeneration heater being connected to the top air hole of the first dryer through a thirteenth branch, the top air hole of the second dryer through a fourteenth branch, and the top air hole of the third dryer through a fifteenth branch; a drying, regeneration and cooling separation circuit, one end of which is connected to the bottom air hole of the first dryer through a sixteenth branch, to the bottom air hole of the second dryer through a seventeenth branch, and to the bottom air hole of the third dryer through an eighteenth branch; The other end of the drying regeneration cooling separation line is connected to the drying regeneration cooler, the drying regeneration cooler is connected to the inlet of the drying regeneration separator, the liquid phase outlet of the drying regeneration separator is connected to the water outlet, and the gas phase outlet of the drying regeneration separator is connected to the other end of the adsorption line.

2. The three-tower isobaric drying device according to claim 1, characterized in that: A flow regulating valve is provided on the adsorption line, a feed valve is provided on the first branch, the second branch and the third branch respectively, and an outlet valve is provided on the fourth branch, the fifth branch and the sixth branch respectively.

3. The three-tower isobaric drying device according to claim 2, characterized in that: Program-controlled valves are respectively provided on the seventh branch road, the eighth branch road, the ninth branch road, the tenth branch road, the eleventh branch road and the twelfth branch road.

4. The three-tower isobaric drying device according to claim 3, characterized in that: Program-controlled valves are respectively provided on the thirteenth branch road, the fourteenth branch road, the fifteenth branch road, the sixteenth branch road, the seventeenth branch road and the eighteenth branch road.

5. The three-tower isobaric drying device according to claim 4, characterized in that: A flow meter is provided on the heating circuit.

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