CN214175828U - Large-scale power transformer online water removal system regenerating unit - Google Patents

Abstract

A large-scale power transformer online dewatering system regenerating unit comprises a weight measuring platform, an amplifier, a gravity sensor, a control module, a molecular sieve dewatering tank body group, a centrifugal pump, an oil pump, a primary oil inlet pipe, a secondary oil inlet pipe, an oil outlet pipe and a high-temperature purging device; the molecular sieve dewatering tank set is installed on the weight measuring platform and is monitored by the gravity sensor in real time, the inlet of the molecular sieve dewatering tank is communicated with the purging device, the outlet of the molecular sieve dewatering tank set is communicated with the gas-liquid separation device, and separated gas and liquid are output outwards through the exhaust pipe and the liquid outlet pipe. The online dewatering system regeneration device is characterized in that a molecular sieve is arranged in a drying tank body to filter transformer oil, so that moisture in the transformer oil and moisture generated by aging of an insulating material are removed, and the transformer is kept in a dry state all the time; and the molecular sieve water removal tank body group is purged by dry air in sequence, so that molecular sieve regeneration is achieved, the purging device can provide dry air, and the molecular sieve water removal tank body group has the advantages of good safety performance, good regeneration effect and the like.

Description

Large-scale power transformer online water removal system regenerating unit

Technical Field

The utility model relates to a transformer equipment field especially relates to an online water removal system regenerating unit of large-scale power transformer. The utility model is suitable for a water removal system regeneration based on molecular sieve technique.

Background

Transformers are the most important primary equipment of a substation. Moisture in the running transformer mainly comes from moisture remained inside during manufacturing, moisture invading outside during running and moisture generated by aging of oil paper during running: 1. residual moisture in oil and solid insulation during the manufacturing process of the transformer; 2. moisture ingress from the outside during operation; 3. moisture generated by aging of the oiled paper during running. Water is generated during the degradation reaction of the cellulose molecular chains, and when water is released from the fiber molecules, the process is accelerated, resulting in the generation of more moisture, and thus it appears that the degradation reaction of cellulose is accelerated in the initial stage. The high molecular oxidation cracking of the transformer oil, the oxidation of the coating on the inner surface of the organic polymer insulating part and the cracking can generate moisture. The moisture and its effect of the oil paper insulation during aging, which is closely related to the operation of the transformer, is not negligible.

How to make a transformer treat transformer oil moisture based on a molecular sieve dehydration device, judge the moisture adsorption capacity of the transformer oil moisture, regenerate the transformer oil moisture, and reuse the transformer oil moisture adsorption capacity for moisture adsorption is an important content in online water removal. The prior art uses molecular sieve filled dehydration tanks for batch processing, and molecular sieves are dried in ovens at high temperatures under off-line conditions to achieve regeneration.

However, in the regeneration process of the molecular sieve, the problems of insufficient moisture removal inside the treated molecular sieve, poor regeneration effect, long treatment time and the like are easily caused, so that the molecular sieve is difficult to be widely applied. Meanwhile, the dewatering device in the prior art has high manufacturing cost and high maintenance cost, and is not beneficial to online dewatering of transformer equipment.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that prior art exists, provide a large-scale power transformer online dewatering system regenerating unit who has good security performance and regeneration effect, lower plant maintenance and transformation expense.

The utility model discloses a following technical scheme, a large-scale power transformer online dewatering system regenerating unit includes: the device comprises a weight measuring platform, a gravity sensor, an amplifier, a control module, a molecular sieve dewatering tank body group, a centrifugal pump, an oil pump, a primary oil inlet pipe, a secondary oil outlet pipe, a waste gas liquid treatment device and an electric valve. A centrifugal pump is arranged between the first-stage oil inlet pipe and the second-stage oil inlet pipe of the oil pump and is used for adjusting the circulation speed; the molecular sieve dewatering tank set is arranged on the weight measuring platform and is monitored by a gravity sensor in real time, the outlet of the centrifugal pump is communicated with the inlet of the molecular sieve dewatering tank set, the inlet is communicated with the secondary oil inlet pipe, and the outlet of the molecular sieve dewatering tank set is communicated with the oil outlet pipe; the method is characterized in that: the inner cavity of the molecular sieve dewatering tank body group is filled with a molecular sieve, and a plurality of molecular sieve dewatering tanks are connected in series to form a molecular sieve dewatering tank body group; the molecular sieve dewatering tanks in one molecular sieve dewatering tank group are vertically arranged, one port of the lower molecular sieve dewatering tank is an inlet of the molecular sieve dewatering tank, and one port of the upper molecular sieve dewatering tank is an outlet of the molecular sieve dewatering tank; the inlet of the molecular sieve dehydration tank is communicated with a blowing device; the outlet of the molecular sieve dewatering tank group is communicated with a gas-liquid separation device, an outlet distribution valve is arranged between the outlet of the reactor and the gas-liquid separation device as well as between the outlet of the reactor and the oil outlet pipe, the inlet of the outlet distribution valve is communicated with the outlet of the molecular sieve dewatering tank group, and the two outlets are respectively communicated with the oil outlet pipe and the inlet of the gas-liquid separation device; an inlet distribution valve is arranged between an inlet of the molecular sieve dewatering tank group and the centrifugal pump and between an inlet of the molecular sieve dewatering tank group and the high-temperature purging device, an outlet of the inlet distribution valve is communicated with an inlet of the molecular sieve dewatering tank group, and the two inlets are respectively communicated with an outlet of the centrifugal pump and the high-temperature purging device.

As a further aspect of the present invention: when the water absorption capacity of the molecular sieve reaches a certain set value of the self weight of the molecular sieve, the molecular sieve dewatering tank group is withdrawn, and the regeneration device is started.

As a further aspect of the present invention: the fluid in the molecular sieve water removal tank group flows from low to high, and the fluid speed depends on the working pressure of the centrifugal pump, the height of the molecular sieve water removal tank group and the filling rate of the molecular sieve.

As a further aspect of the present invention: under the condition of a transformer substation, the blowing device consists of a blower and an electric heater; under the condition of a power plant, dry air provided by adjusting the pressure of air from an air compressor system through a pressure reducing valve is used for sweeping and regenerating the molecular sieve.

As a further aspect of the present invention: and the outlet distribution valve conveys the dewatered transformer oil into an oil outlet, and the dried air for molecular sieve regeneration treatment flows into a gas-liquid separation device and is subjected to gas-liquid separation and cooling through the gas-liquid separation device.

As a further aspect of the present invention: an electric valve is arranged between the blowing device and the inlet distribution valve, and the blowing device is controlled to be opened to communicate with the molecular sieve dewatering device.

Compared with the prior art, the utility model beneficial effect be: the gravity sensor is used for detecting, the water removal capacity and the regeneration requirement of the molecular sieve water removal tank body set are accurately detected, the molecular sieve water removal tank body set is swept through dry air, the purpose of molecular sieve regeneration is achieved, the online regeneration effect is achieved through the sweeping device, and the molecular sieve water removal tank body set has the advantages of being good in safety performance, good in regeneration effect and the like.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic structural diagram of a large power transformer online water removal system regeneration device of the present invention.

In the figure, 1, a weight measuring platform, 2, a gravity sensor, 3, a molecular sieve dewatering tank body group, 4, a centrifugal pump, 5, an oil pump, 6, a primary oil inlet pipe, 7, a secondary oil inlet pipe, 8, an oil outlet pipe, 9, a purging device, 10, a check valve, 11, a gas-liquid separation device, 12, an outlet distribution valve, 13, an inlet distribution valve, 14, a control module, 15, a waste gas-liquid treatment device, 16, an amplifier, 17 and an oscilloscope

Detailed Description

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the utility model discloses a following technical scheme, a large-scale power transformer online dewatering system regenerating unit, include: the device comprises a weight measuring platform 1, a gravity sensor 2, a molecular sieve dewatering tank group 3, a centrifugal pump 4, an oil pump 5, a primary oil inlet pipe 6, a secondary oil inlet pipe 7, an oil outlet pipe 8, a purging device 9, a gas-liquid separation device 11, an outlet distribution valve 12, an inlet distribution valve 13, a control module 14 and an amplifier 16; a centrifugal pump 4 is arranged between a first-stage oil inlet pipe 6 and a second-stage oil inlet pipe 7 of the oil pump; the molecular sieve dewatering tank group 3 is installed on the weight measuring platform 1 and is monitored in real time by the gravity sensor 2, the outlet of the centrifugal pump 4 is communicated with the inlet of the molecular sieve dewatering tank group 3, the inlet of the centrifugal pump 4 is communicated with the secondary oil inlet pipe 7, and the outlet of the molecular sieve dewatering tank group 3 is communicated with the oil outlet pipe 8. The online water removal system regeneration device may further include: an oscilloscope 17 connected with the waste gas-liquid treatment device 15 connected with the gas-liquid separation device 11 and the control module 14.

The inner cavity of the molecular sieve dewatering tank body group 3 is filled with a molecular sieve, and a plurality of molecular sieve dewatering tanks are connected in series to form a molecular sieve dewatering tank body group; the molecular sieve dewatering tanks in one molecular sieve dewatering tank group are vertically arranged, one port of the lower molecular sieve dewatering tank is an inlet of the molecular sieve dewatering tank, and one port of the upper molecular sieve dewatering tank is an outlet of the molecular sieve dewatering tank; the inlet of the molecular sieve dewatering tank is communicated with a blowing device 9; an outlet of the molecular sieve dewatering tank group is communicated with a gas-liquid separation device 11; an outlet distribution valve 12 is arranged between the outlet of the reactor and the gas-liquid separation device 11 and the oil outlet pipe 8, the inlet of the outlet distribution valve 12 is communicated with the outlet of the molecular sieve dewatering tank body group 3, and two outlets of the outlet distribution valve 12 are respectively communicated with the inlet of the oil outlet pipe 8 and the inlet of the gas-liquid separation device 11; an inlet distribution valve 13 is arranged between the inlet of the molecular sieve dewatering tank group 3 and the centrifugal pump 4 and the purging device 9, the outlet of the inlet distribution valve 13 is communicated with the inlet of the molecular sieve dewatering tank group 3, and two inlets of the inlet distribution valve 13 are respectively communicated with the outlet of the centrifugal pump 4 and the purging device 9.

Preferably, a sensor weighing method is used for evaluating the water absorption degree of the molecular sieve, data measured by the gravity sensor 2 are transmitted to the control module 14 through the amplifier 16, and when the water absorption capacity of the molecular sieve reaches a certain set value of the self weight of the molecular sieve, the control module 14 controls the molecular sieve water tank group 3 to exit and starts the regeneration device.

Preferably, the flow in the molecular sieve water removal tank set is from low to high, and the flow speed depends on the working pressure of the centrifugal pump 4 and the height of the molecular sieve water removal tank set 3, and the filling rate of the molecular sieve.

Preferably, the outlet distribution valve discharges the transformer oil after water removal into the oil outlet, and the air for molecular sieve regeneration treatment flows into the gas-liquid separation device 11, and is subjected to gas-liquid separation and cooling through the gas-liquid separation device 11.

The description of the invention is merely exemplary in nature and variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.

Claims (2)

1. The utility model provides a large-scale power transformer online water removal system regenerating unit, includes: the device comprises a weight measuring platform (1), a gravity sensor (2), a molecular sieve dewatering tank set (3), a centrifugal pump (4), an oil pump (5), a primary oil inlet pipe (6), a secondary oil inlet pipe (7), an oil outlet pipe (8), a purging device (9), a gas-liquid separation device (11), an outlet distribution valve (12), an inlet distribution valve (13), a control module (14) and an amplifier (16); it is characterized in that the preparation method is characterized in that,

a centrifugal pump (4) is arranged between the first-stage oil inlet pipe (6) and the second-stage oil inlet pipe (7) of the oil pump; the molecular sieve dewatering tank set (3) is arranged on the weight measuring platform (1) and is monitored by the gravity sensor (2) in real time, the outlet of the centrifugal pump (4) is communicated with the inlet of the molecular sieve dewatering tank set (3), the inlet of the centrifugal pump (4) is communicated with the secondary oil inlet pipe (7), and the outlet of the molecular sieve dewatering tank set (3) is communicated with the oil outlet pipe (8);

the inner cavity of the molecular sieve dewatering tank body group (3) is filled with a molecular sieve, and a plurality of molecular sieve dewatering tanks are connected in series to form a molecular sieve dewatering tank body group; the molecular sieve dewatering tanks in one molecular sieve dewatering tank group are vertically arranged, one port of the lower molecular sieve dewatering tank is an inlet of the molecular sieve dewatering tank, and one port of the upper molecular sieve dewatering tank is an outlet of the molecular sieve dewatering tank; the inlet of the molecular sieve dewatering tank is communicated with a blowing device (9); the outlet of the molecular sieve dewatering tank group is communicated with a gas-liquid separation device (11); an outlet distribution valve (12) is arranged between the outlet of the reactor and the gas-liquid separation device (11) and the oil outlet pipe (8), the inlet of the outlet distribution valve (12) is communicated with the outlet of the molecular sieve dewatering tank body group (3), and two outlets of the outlet distribution valve (12) are respectively communicated with the inlets of the oil outlet pipe (8) and the gas-liquid separation device (11); an inlet distribution valve (13) is arranged between an inlet of the molecular sieve dewatering tank set (3) and the centrifugal pump (4) and the purging device (9), an outlet of the inlet distribution valve (13) is communicated with an inlet of the molecular sieve dewatering tank set (3), two inlets of the inlet distribution valve (13) are respectively communicated with an outlet of the centrifugal pump (4) and the purging device (9), and data measured by the gravity sensor (2) are transmitted to the control module (14) through the amplifier (16).

2. The large power transformer online water removal system regeneration device of claim 1, wherein:

under substation conditions, the purging device (9) consists of a blower and an electric heater.

Images