Adsorption tower drying system

Abstract

The utility model relates to an adsorption tower drying system which comprises a drying filter, a standby drying filter, a dust filter, a standby dust filter and an adsorption tower, the drying filter and the dust filter are respectively provided with an on-off valve at an inlet and an outlet, and the standby drying filter and the standby dust filter are respectively provided with an isolating valve at the inlet and the outlet. The inlet and the outlet of the drying filter are correspondingly communicated with the inlet and the outlet of the standby drying filter, the inlet and the outlet of the dust filter are correspondingly communicated with the inlet and the outlet of the standby dust filter, the inlet of the drying filter is communicated with the front-end pipeline and wet gas is introduced, and the outlet of the drying filter is communicated with the inlet of the adsorption tower; an inlet of the dust filter is communicated with an outlet of the adsorption tower, an outlet of the dust filter is communicated with the rear-end pipeline and discharges dry gas, the specification and the size of the standby dry filter are both smaller than those of the dry filter, and the specification and the size of the standby dust filter are both smaller than those of the dust filter. The system can reduce equipment investment and occupied area.

Description

Technical Field

[0001] The utility model relates to the technical field of gas drying, in particular to an adsorption tower drying system. Background Art

[0002] In the traditional adsorption tower drying system, filters need to be installed at the inlet and outlet of the adsorption tower. The pre-filter is used to remove liquid water in the inlet humid gas to prevent the desiccant in the adsorption tower from contacting with the liquid substance and causing compaction; the post-filter is used to remove dust in the outlet dry gas to prevent clogging of the rear-end pipeline of the adsorption tower outlet.

[0003] At the same time, in order to ensure the normal operation of the system during filter maintenance, both the pre-filter and the post-filter are provided with two, one open and one spare, so that when the pre-filter or the post-filter is maintained and replaced, the spare filter can be switched to ensure the normal operation of the system.

[0004] However, at present, the filters in the adsorption tower drying system, one in operation and one in reserve, use the same specifications, which results in high equipment investment and large space occupation. In addition, the timing of replacing the filter element on the filter is determined by the experience of the maintenance personnel, which lacks scientific basis and is prone to early or late replacement of the filter element, resulting in waste of resources or quality problems of the product gas. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an adsorption tower drying system which can reduce equipment investment and equipment floor space.

[0006] The utility model adopts the following technical solutions:

[0007] The utility model provides an adsorption tower drying system, comprising a drying filter, a spare drying filter, a dust filter, a spare dust filter and an adsorption tower, the drying filter and the dust filter are both provided with opening and closing valves at their inlet and outlet, the spare drying filter and the spare dust filter are both provided with isolation valves at their inlet and outlet, the inlet and outlet of the drying filter are correspondingly communicated with the inlet and outlet of the spare drying filter, the inlet and outlet of the dust filter are correspondingly communicated with the inlet and outlet of the spare dust filter, the inlet of the drying filter is communicated with a front-end pipeline and wet gas is introduced, the outlet of the drying filter is communicated with the inlet of the adsorption tower, the inlet of the dust filter is communicated with the outlet of the adsorption tower, the outlet of the dust filter is communicated with a rear-end pipeline and dry gas is discharged, the specification and volume of the spare drying filter are both smaller than those of the drying filter, and the specification and volume of the spare dust filter are both smaller than those of the dust filter.

[0008] Preferably, a differential pressure gauge is installed at the inlet and outlet of each of the drying filter and the dust filter, and the differential pressure gauge is used to detect the pressure difference between the inlet and outlet of the drying filter and the dust filter.

[0009] Preferably, the differential pressure gauge has a signal remote transmission module, and the signal remote transmission module is connected to the alarm signal in the control room through the controller in the gas production system.

[0010] Preferably, root valves are installed at both ends of the differential pressure gauge.

[0011] Preferably, the differential pressure gauge at the dust filter is connected to an online dew point meter at both ends, and the online dew point meter is connected to the alarm signal in the control room through the controller in the gas production system.

[0012] Preferably, a dust filter protector is installed at the inlet of the online dew point meter to protect the online dew point meter 10 .

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the adsorption tower drying system of the utility model, in order to ensure the normal operation of the system during filter maintenance and replacement, both the drying filter and the dust filter are set up with one open and one spare, but the specifications and volume of the spare filter are smaller than the filter used under normal working conditions, thereby being able to save equipment investment and reduce floor space while meeting the one open and one spare setting of the filter.

[0015] At the same time, since the inspection and replacement time of the filter is not long, even if a spare filter with smaller specifications and volume is used under inspection conditions, it will not significantly affect the quality of the product gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an adsorption tower drying system in an embodiment of the utility model.

[0017] The reference numerals are described as follows:

[0018] 1. Dry filter 7. Isolation valve

[0019] 2. Spare dry filter 8. Differential pressure gauge

[0020] 3. Dust filter 9. Root valve

[0021] 4. Spare dust filter 10. Online dew point meter

[0022] 5. Adsorption tower 11. Dust filter protector

[0023] 6. On / off valve 12. Pipeline DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0028] See also Figure 1 The present embodiment provides an adsorption tower drying system, comprising a drying filter 1, a spare drying filter 2, a dust filter 3, a spare dust filter 4 and an adsorption tower 5. The drying filter 1 and the dust filter 3 are both provided with an on-off valve 6 at their inlet and outlet, and the spare drying filter 2 and the spare dust filter 4 are both provided with an isolation valve 7 at their inlet and outlet. The inlet and outlet of the drying filter 1 are correspondingly connected to the inlet and outlet of the spare drying filter 2, and the inlet and outlet of the dust filter 3 are correspondingly connected to the inlet and outlet of the spare dust filter 4. The inlet of the drying filter 1 is connected to the front-end pipeline and wet gas is introduced into the inlet. The outlet of the drying filter 1 is connected to the inlet of the adsorption tower 5, and the inlet of the dust filter 3 is connected to the outlet of the adsorption tower 5. The outlet of the dust filter 3 is connected to the rear-end pipeline and dry gas is discharged. The specification and volume of the spare drying filter 2 are both smaller than those of the drying filter 1, and the specification and volume of the spare dust filter 4 are both smaller than those of the dust filter 3.

[0029] Combination Figure 1In the adsorption tower drying system of the present embodiment, the drying filter 1 is a pre-filter, which is used to remove liquid water in the inlet humid gas to prevent the liquid substance from entering the adsorption tower 5 and causing the desiccant to harden; and the dust filter 3 is a post-filter, which is used to remove dust in the outlet dry gas to prevent clogging of the rear-end pipeline; under normal operating conditions, the drying filter 1 and the dust filter 3 are involved in the work, and when the filter element of the drying filter 1 and the dust filter 3 needs to be replaced, the opening and closing valves 6 at the inlet and outlet of the drying filter 1 and the inlet and outlet of the dust filter 3 are closed, and the isolation valves 7 installed at the inlet and outlet of the spare drying filter 2 and the spare dust filter 4 are opened, and the gas path is switched to the spare drying filter 2 and the spare dust filter 4 to participate in the work.

[0030] Obviously, in the adsorption tower drying system of the present embodiment, in order to ensure the normal operation of the system during filter maintenance and replacement, both the drying filter 1 and the dust filter 3 are set up with one open and one spare, but the specifications and volume of the spare filter are smaller than the filter used under normal working conditions, thereby being able to save equipment investment and reduce floor space while meeting the one-open and one spare setting of the filter.

[0031] At the same time, since the inspection and replacement time of the filter is not long, even if a spare filter with smaller specifications and volume is used under inspection conditions, it will not significantly affect the quality of the product gas.

[0032] Preferably, see Figure 1 The filter dryer 1 and the dust filter 3 are both equipped with a differential pressure gauge 8 at the inlet and outlet, and the differential pressure gauge 8 is used to detect the differential pressure between the inlet and outlet of the filter dryer 1 and the dust filter 3. Equipment inspection personnel can read the differential pressure reading displayed by the differential pressure gauge 8 on site, so as to accurately judge the degree of blockage of the filter element and replace the filter element in time.

[0033] Preferably, the differential pressure gauge 8 has a signal remote transmission module, which is connected to the alarm signal in the control room through the controller in the gas production system. The controller is set with a pressure difference comparison value, which is input and set in advance by the design unit. When the pressure difference value transmitted to the controller by the signal remote transmission module exceeds the comparison value, the controller will control the alarm to alarm, so as to remind the inspection personnel to inspect the filter at that location.

[0034] Preferably, see Figure 1 , root valves 9 are respectively installed at both ends of the differential pressure gauge 8. When the differential pressure gauge 8 needs to be replaced or debugged, the differential pressure gauge 8 can be calibrated without affecting the operation of the system by closing the root valves 9 at both ends.

[0035] Preferably, see Figure 1The differential pressure gauge 8 at the dust filter 3 is connected to an online dew point meter 10 at both ends, and the online dew point meter 10 is connected to the alarm signal in the control room through the controller in the gas production system.

[0036] The online dew point meter 10 can monitor the dew point of the outlet dry gas online under the working pressure. When the dryness monitoring value is higher than the comparison value pre-set in the controller, it means that the dew point is too high and the dry filter 1 has a fault. At this time, the controller will control the alarm to sound, and the dry gas that has been tested can be re-introduced into the main route and continued to be transported through the rear-end pipeline, without loss of product gas.

[0037] In addition, when the dew point is detected to be too high, in order to ensure the quality of the product gas, the controller can also directly control the entire gas production system to shut down.

[0038] Preferably, see Figure 1 A dust filter protector 11 is installed at the inlet of the online dew point meter 10 to protect the online dew point meter 10. The dust is absorbed by the dust filter protector 11, which can prevent the dust from affecting the measurement result of the online dew point meter 10 and wearing the dew point probe, thereby ensuring the measurement accuracy.

[0039] Specifically, in this embodiment, the dry filter 1 and the spare dry filter 2 both adopt a coalescing filter element; the dust filter 3, the spare dust filter 4 and the error elimination filter 11 all adopt a dust filter element.

[0040] Furthermore, in this embodiment, the accuracy of the condensation filter element is 0.01 μm, the accuracy of the dust filter element is 1 μm, and the upper and lower covers of the dry filter 1, the spare dry filter 2, the dust filter 3, the spare dust filter 4 and the dust filter protector 11 are all made of aluminum alloy, the inner and outer frames are all made of stainless steel, and the filter layers are also made of glass fiber.

[0041] Also, see Figure 1 In this embodiment, the connection between each part is realized through the pipeline 12, the online dew point meter 10 and the differential pressure meter 8 share a set of root valves 9, forming a three-way structure on the branch line, which is beneficial to reduce the number of valves and welding points of the main pipeline.

[0042] 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 substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An adsorption tower drying system, comprising a drying filter (1), a spare drying filter (2), a dust filter (3), a spare dust filter (4) and an adsorption tower (5), wherein the drying filter (1) and the dust filter (3) are both provided with an on-off valve (6) at their inlet and outlet, and the spare drying filter (2) and the spare dust filter (4) are both provided with an isolation valve (7) at their inlet and outlet, the inlet and outlet of the drying filter (1) are correspondingly connected to the inlet and outlet of the spare drying filter (2), the inlet and outlet of the dust filter (3) are correspondingly connected to the inlet and outlet of the spare dust filter (4), the inlet of the drying filter (1) is connected to a front-end pipeline and wet gas is introduced, the outlet of the drying filter (1) is connected to the inlet of the adsorption tower (5), the inlet of the dust filter (3) is connected to the outlet of the adsorption tower (5), the outlet of the dust filter (3) is connected to a rear-end pipeline and dry gas is discharged, characterized in that The specifications and volume of the spare drying filter (2) are both smaller than those of the drying filter (1), and the specifications and volume of the spare dust filter (4) are both smaller than those of the dust filter (3).

2. The adsorption tower drying system according to claim 1, characterized in that: The drying filter (1) and the dust filter (3) are both provided with a differential pressure gauge (8) at the inlet and outlet, and the differential pressure gauge (8) is used to detect the pressure difference between the inlet and outlet of the drying filter (1) and the dust filter (3).

3. The adsorption tower drying system according to claim 2, characterized in that: The differential pressure gauge (8) has a signal remote transmission module, and the signal remote transmission module is connected to the alarm signal in the control room through the controller in the gas production system.

4. The adsorption tower drying system according to claim 2, characterized in that: Root valves (9) are respectively installed at both ends of the differential pressure gauge (8).

5. The adsorption tower drying system according to claim 4, characterized in that: The differential pressure gauge (8) at the dust filter (3) is connected to an online dew point meter (10) at both ends, and the online dew point meter (10) is connected to an alarm signal in a control room through a controller in the gas production system.

6. The adsorption tower drying system according to claim 5, characterized in that: A dust filter protector (11) is installed at the inlet of the online dew point meter (10) to protect the online dew point meter (10).

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