CN210751996U

CN210751996U - Energy-saving dehydration device for low-pressure process gas

Info

Publication number: CN210751996U
Application number: CN201921543183.6U
Authority: CN
Inventors: 邓良键; 张天来; 王锐
Original assignee: Chengdu Tianlan Chemical Engineering Technology Co ltd
Current assignee: Chengdu Tianlan Chemical Engineering Technology Co ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-06-16
Anticipated expiration: 2029-09-17

Abstract

The utility model provides an energy-saving dehydration device for low-pressure process gas, which relates to the technical field of gas dehydration and comprises an air inlet pipe, an air outlet pipe, a pressure equalizing pipe, a suction component and a plurality of dehydration towers, wherein one ends of the plurality of dehydration towers are respectively communicated with the air inlet pipe and the suction pipe through valves, the other ends of the plurality of dehydration towers are respectively communicated with the air outlet pipe through valves, the pressure equalizing pipe is respectively communicated with the plurality of dehydration towers, and the suction component is communicated with the suction pipe to generate negative pressure when in desorption; the utility model relates to a rationally, adopt the absorbent mode of low pressure to carry out the dewatering to the process gas, and adopt vacuum regeneration's mode, do not have the heating unit, avoid causing the decomposition of process gas.

Description

Energy-saving dehydration device for low-pressure process gas

Technical Field

The utility model relates to a gas dehydration technical field particularly, relates to an energy-conserving dewatering device of low pressure process gas.

Background

The air drying in the prior art mainly has three modes: freezing type drying, micro-heat regeneration adsorption type drying, freezing and micro-heat regeneration adsorption combined type drying. When the low-pressure 0.1-0.3MPaG process gas is dried, the pressure can be increased to 0.65-0.8MPaG, and the process is adopted for drying, so that the compression energy consumption is overhigh; the direct pressurization to 0.1-0.3MPaG can also be adopted for drying, the condition that a refrigerator or an external heating source has overhigh energy consumption can occur in the mode, and the absorption pressure is low, the desorption is carried out under normal pressure, the gas loss of products is large, and the additional power loss of a compressor is brought. In addition, if the process gas is a heat sensitive gas, decomposition of the gas may be caused during the heating regeneration process, resulting in unnecessary impurities being generated from the process gas.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an energy-conserving dewatering device of low pressure process gas, its mode that adopts the low pressure to adsorb carries out the dewatering to process gas, and adopts vacuum regeneration's mode, does not have the heating unit, avoids causing the decomposition of process gas.

The embodiment of the utility model is realized like this:

the utility model provides an energy-conserving dewatering device of low pressure technology gas, includes intake pipe, outlet duct, equalizer tube, suction subassembly and a plurality of dehydration tower, and is a plurality of dehydration tower one end respectively through the valve with the intake pipe the suction tube intercommunication, a plurality of dehydration tower other ends respectively through the valve with the outlet duct intercommunication, the equalizer tube is close to outlet duct one end intercommunication with a plurality of dehydration towers respectively, suction subassembly intercommunication suction tube is used for producing the negative pressure when the desorption.

Further, the suction assembly comprises a vacuumizing buffer tank and a vacuum pump, the vacuumizing buffer tank is communicated with the suction pipe, and an inlet of the vacuum pump is communicated with the vacuumizing buffer tank.

Further, still include recycling system, recycling system intercommunication the suction subassembly is used for receiving and handling desorption gas, recycling system intercommunication the intake pipe is used for discharging desorption gas thereby realizes the gas recycling.

Furthermore, the recycling system comprises a first dehydration mechanism, the first dehydration mechanism is a desorption gas drainage buffer tank, an inlet of the desorption gas drainage buffer tank is communicated with the suction assembly, an outlet of the desorption gas drainage buffer tank is communicated with the air inlet pipe through a desorption gas compressor, and a water outlet of the desorption gas drainage buffer tank is communicated with the outside.

Further, still include second dewatering mechanism, second dewatering mechanism locates desorption gas compressor with between the intake pipe, second dewatering mechanism is including desorption gas cooler and the desorption gas cooling drainage buffer tank that connects gradually, desorption gas cooler (722) intercommunication desorption gas compressor's export, desorption gas cooling drainage buffer tank's export intercommunication intake pipe, desorption gas cooling drainage buffer tank's outlet intercommunication is external.

Further, the device also comprises a forward pipe and a backward pipe, wherein the forward pipe is communicated with one end, close to the pressure equalizing pipe, of each of the dewatering towers, the forward pipe is connected with a forward venting buffer tank, and the backward pipe is communicated with one end, close to the air inlet pipe, of each of the dewatering towers.

Further, the reverse release pipe is communicated with the desorption gas drainage buffer tank.

Further, the drying agent in the dehydration tower is one or a mixture of more of alumina, silica gel and 3A zeolite molecular sieve.

The utility model has the advantages that:

the utility model relates to a rationally, adopt the absorbent mode of low pressure to carry out the dewatering to the process gas, and adopt vacuum regeneration's mode, do not have the heating unit, avoid causing the decomposition of process gas.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an energy-saving dewatering device provided in embodiments 1, 2 and 3 of the present invention;

icon: 1-air inlet pipe, 2-air outlet pipe, 3-pressure equalizing pipe, 4-suction pipe, 5-suction component, 51-vacuum pumping buffer tank, 52-vacuum pump, 6-dehydration tower, 7-recycling system, 71-first dehydration mechanism, 72-second dehydration mechanism, 721-desorption gas compressor, 722-desorption gas cooler, 723-desorption gas cooling and water discharging buffer tank, 8-forward discharging pipe, 81-forward discharging buffer tank and 9-backward discharging pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1, the present embodiment provides an energy-saving dehydration device for low-pressure process gas, which includes a gas inlet pipe 1, a gas outlet pipe 2, a pressure equalizing pipe 3, a suction pipe 4, a suction assembly 5 and a plurality of dehydration towers 6, wherein one end of each of the plurality of dehydration towers 6 is respectively communicated with the gas inlet pipe 1 and the suction pipe 4 through a valve, the other end of each of the plurality of dehydration towers 6 is respectively communicated with the gas outlet pipe 2 through a valve, the pressure equalizing pipe 3 is respectively communicated with one end of each of the plurality of dehydration towers 6 close to the gas outlet pipe 2, and the suction assembly; in this embodiment, the suction assembly 5 includes a vacuum-pumping buffer tank 51 and a vacuum pump 52, the vacuum-pumping buffer tank 51 is communicated with the suction pipe 4, and an inlet of the vacuum pump 52 is communicated with the vacuum-pumping buffer tank 51; the drying agent in the dehydration tower 6 is one or a mixture of more of alumina, silica gel and 3A zeolite molecular sieve; raw material low-pressure process gas (0.1-0.3MPaG) enters a dehydrating tower 6 through an air inlet pipe 1, and after being adsorbed and dried by a drying agent in the dehydrating tower 6, dried product process gas is sent to a user. The adsorbent which is adsorbed to be close to saturation undergoes uniform reduction, vacuum pumping, uniform rise and final rise, and enters the adsorption time sequence again to complete a working period; the utility model relates to a rationally, adopt the absorbent mode of low pressure to carry out the dewatering to the process gas, and adopt vacuum regeneration's mode, do not have the heating unit, avoid causing the decomposition of process gas.

Example 2

The present embodiment includes all the contents of embodiment 1, except that, in order to recover the process gas as completely as possible, the present embodiment further includes a recycling system 7, the recycling system 7 is communicated with the suction assembly 5 to receive and process the desorption gas, and the recycling system 7 is communicated with the gas inlet pipe 1 to exhaust the desorption gas so as to recycle the gas; in this embodiment, the recycling system 7 includes a first dehydration mechanism 71, the first dehydration mechanism 71 is a desorption gas drainage buffer tank, an inlet of the desorption gas drainage buffer tank is communicated with the suction assembly 5, an outlet of the desorption gas drainage buffer tank is communicated with the air inlet pipe 1 through a desorption gas compressor 721, and a drain outlet of the desorption gas drainage buffer tank is communicated with the outside; the gas discharged by desorption is merged in a desorption gas drainage buffer tank, and after water separation operation, desorption gas is discharged, is subjected to pressure increase by a desorption gas compressor 721 and is then introduced into the gas inlet pipe 1 for recycling.

Example 3

The present embodiment includes all the contents of embodiment 2, except that, the present embodiment further includes a second dehydration mechanism 72, the second dehydration mechanism 72 is disposed between the desorbed gas compressor 721 and the air inlet pipe 1, the second dehydration mechanism 72 includes a desorbed gas cooler 722 and a desorbed gas cooling and water draining buffer tank 723 which are connected in sequence, the desorbed gas cooler 722 is communicated with an outlet of the desorbed gas compressor 721, an outlet of the desorbed gas cooling and water draining buffer tank 723 is communicated with the air inlet pipe 1, and a water outlet of the desorbed gas cooling and water draining buffer tank 723 is communicated with the outside; the desorption gas is converged in a desorption gas drainage buffer tank, enters a desorption gas compressor 721 to be pressurized after water separation operation, is discharged into a desorption gas cooling drainage buffer tank 723 to be subjected to water separation operation after being cooled by a desorption gas cooler 722 after being pressurized, and enters the gas inlet pipe 1 to be mixed with the raw material low-pressure process gas for recycling.

Example 4

The embodiment includes all the contents of embodiment 1, embodiment 2 or embodiment 3, except that, in order to have better desorption effect, the embodiment further includes a forward discharging pipe 8 and a reverse discharging pipe 9, the forward discharging pipe 8 is respectively communicated with one ends of the plurality of dehydration towers 6 close to the pressure equalizing pipe 3, the forward discharging pipe 8 is connected with a forward discharging buffer tank 81, and the reverse discharging pipe 9 is respectively communicated with one ends of the plurality of dehydration towers 6 close to the air inlet pipe 1; the reverse discharge pipe 9 is communicated with a desorption gas drainage buffer tank, and can be discharged to other positions; raw material low-pressure process gas (0.1-0.3MPaG) enters a dehydrating tower 6 through an air inlet pipe 1, and after being adsorbed and dried by a drying agent in the dehydrating tower 6, dried product process gas is sent to a user. The adsorbent which is adsorbed to be close to saturation undergoes uniform descending, sequential discharging, reverse discharging, vacuumizing, sequential gas discharging and blowing, uniform ascending and final ascending, and enters the adsorption time sequence again to finish a working cycle.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-conserving dewatering device of low pressure process gas which characterized in that: including intake pipe (1), outlet duct (2), equalizer tube (3), suction tube (4), suction subassembly (5) and a plurality of dehydration tower (6), it is a plurality of dehydration tower (6) one end respectively through the valve with intake pipe (1) suction tube (4) intercommunication, a plurality of dehydration tower (6) other ends respectively through the valve with outlet duct (2) intercommunication, equalizer tube (3) are close to outlet duct (2) one end intercommunication with a plurality of dehydration tower (6) respectively, suction subassembly (5) intercommunication suction tube (4) are used for producing the negative pressure when the desorption.

2. The energy saving dewatering apparatus according to claim 1, characterized in that: the suction assembly (5) comprises a vacuum pumping buffer tank (51) and a vacuum pump (52), the vacuum pumping buffer tank (51) is communicated with the suction pipe (4), and an inlet of the vacuum pump (52) is communicated with the vacuum pumping buffer tank (51).

3. The energy saving dewatering apparatus according to claim 1, characterized in that: the gas desorption device is characterized by further comprising a recycling system (7), wherein the recycling system (7) is communicated with the suction assembly (5) and used for receiving and treating desorption gas, and the recycling system (7) is communicated with the gas inlet pipe (1) and used for exhausting the desorption gas so as to recycle gas.

4. The energy saving dewatering apparatus according to claim 3, characterized in that: the recycling system (7) comprises a first dehydration mechanism (71), the first dehydration mechanism (71) is a desorption gas drainage buffer tank, an inlet of the desorption gas drainage buffer tank is communicated with the suction assembly (5), an outlet of the desorption gas drainage buffer tank is communicated with the air inlet pipe (1) through a desorption gas compressor (721), and a water outlet of the desorption gas drainage buffer tank is communicated with the outside.

5. The energy saving dewatering apparatus according to claim 4, characterized in that: the desorption gas cooling and water draining system is characterized by further comprising a second dehydration mechanism (72), wherein the second dehydration mechanism (72) is arranged between the desorption gas compressor (721) and the gas inlet pipe (1), the second dehydration mechanism (72) comprises a desorption gas cooler (722) and a desorption gas cooling and water draining buffer tank (723) which are sequentially connected, the desorption gas cooler (722) is communicated with an outlet of the desorption gas compressor (721), an outlet of the desorption gas cooling and water draining buffer tank (723) is communicated with the gas inlet pipe (1), and a water outlet of the desorption gas cooling and water draining buffer tank (723) is communicated with the outside.

6. The energy saving dewatering apparatus according to claim 4, characterized in that: still including putting pipe (8) and putting pipe (9) in the same direction as, in the same direction as put pipe (8) respectively with a plurality of dehydration tower (6) are close to equalizer tube (3) one end intercommunication, are in the same direction as put pipe (8) and connect one in the same direction as the buffer tank of letting out (81), put pipe (9) in the opposite direction respectively with a plurality of dehydration tower (6) be close to intake pipe (1) one end intercommunication.

7. The energy saving dewatering apparatus according to claim 6, characterized in that: the reverse discharging pipe (9) is communicated with the desorption gas drainage buffer tank.

8. The energy saving dewatering apparatus according to claim 1, characterized in that: the drying agent in the dehydration tower (6) is one or a mixture of more of alumina, silica gel and 3A zeolite molecular sieve.