CN214830137U - Low-quality transformer oil recycling system - Google Patents
Low-quality transformer oil recycling system Download PDFInfo
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- CN214830137U CN214830137U CN202120835923.4U CN202120835923U CN214830137U CN 214830137 U CN214830137 U CN 214830137U CN 202120835923 U CN202120835923 U CN 202120835923U CN 214830137 U CN214830137 U CN 214830137U
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Abstract
The utility model provides a low-quality transformer oil recovery system of recycling, raw oil storage tank or/and debugging oil storage tank pass through the measuring pump and are connected with the centrifugal extraction machine, and the centrifugal extraction machine still is equipped with the sour storage tank of raw materials, and the sour storage tank of raw materials passes through acid-fast pump and is connected with the centrifugal extraction machine, and the centrifugal extraction machine is connected with first reation kettle or/and second reation kettle, is equipped with alkali powder storage tank, and alkali powder storage tank is connected with the second reation kettle, and the second reation kettle is connected with alkaline filter residue device. And carrying out an acidification reaction on the low-quality transformer oil and concentrated sulfuric acid by using a centrifugal extractor to obtain primary purified oil, adding alkaline powder into the primary purified oil, stirring and filtering to obtain secondary purified oil, wherein the secondary purified oil after treatment meets the standard of recycling after vacuum dehydration and other treatment tests. The elbow of the power grid development under the dual pressure of resources and environment is relieved, and meanwhile, certain economic benefits can be generated. After the equipment process is optimized, the industrialization can be promoted.
Description
Technical Field
The utility model belongs to the technical field of low-quality transformer oil recovery system of recycling and specifically relates to a low-quality transformer oil recovery system of recycling is related to.
Background
The transformer oil mainly plays roles of insulation, cooling and arc extinction in equipment. The waste mineral oil of the transformer contains various toxic substances, and if the waste mineral oil enters a drinking water source, 1 ton of the waste mineral oil can pollute 100 ten thousand tons of drinking water. The amount of waste mineral oil produced in China is about 2500-3000 ten thousand tons each year. The main body of the degraded transformer oil is still base oil, and the impurities only account for 1-25% of the total amount. If the small part of impurities are removed through purification and regeneration processes, the original excellent performance of the oil product is recovered, and the oil product is put into use, so that the pollution of waste oil to the environment is avoided, the resources are saved, and the economic and social benefits are remarkable.
Therefore, a novel adsorption-filtration process is developed, and the problems of large dielectric loss, high granularity, high micro-water content or corrosive sulfur and the like of various waste transformer oils are solved. However, there are still gaps in the conversion and application of scientific research results, such as insufficient industrialization and standardization of oil processing plants, insufficient social cognition, and resistance to popularization due to reliability-based concerns. Practice proves that the adsorption-filtration method has good treatment effect on the transformer oil with light degradation degree and low treatment cost, but cannot effectively treat the transformer oil with serious degradation. Based on earlier stage research, a set of small test device is created to supplement the existing adsorption-filtration device, so that the quality of the regenerated oil is further improved, and the regenerated oil reaches the quality standard of new oil or operating oil.
Chinese patent "CN 103594231A" the utility model relates to a reduce the adsorption treatment who situated between and decrease to the transformer oil that has deteriorated in the power system transformer, make it reach the processing method that the reduction transformer oil that can continue the use standard situated between and decrease, pass through pipe connection with vacuum oil filter and transformer with the oil regeneration machine that deteriorates, adsorb, filtration treatment. The utility model has the advantages that; the method can reduce dielectric loss of the degraded transformer oil under the condition that the transformer is not stopped and normally operates, but can not treat the seriously degraded transformer oil and can not recycle the seriously degraded transformer oil only by simply adsorbing and filtering the degraded transformer oil.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide a system of recycling is retrieved to low-quality transformer oil solves the problem that the absorption-filtration method can not effectively handle the more serious transformer oil of degradation.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a system of recycling is retrieved to low-quality transformer oil, raw oil storage tank or debugging oil storage tank pass through the measuring pump and are connected with the centrifugal extraction machine, and the centrifugal extraction machine still is equipped with the sour storage tank of raw materials, and the sour storage tank of raw materials passes through acid-fast pump and is connected with the centrifugal extraction machine, and the centrifugal extraction machine is connected with first reation kettle or second reation kettle, is equipped with alkali powder storage tank, and alkali powder storage tank is connected with the second reation kettle, and the second reation kettle is connected with alkaline filter residue device.
In the preferred scheme, the debugging oil storage tank is connected with a raw oil inlet of the centrifugal extractor through a metering pump, and the metering pump is also connected with the first reaction kettle.
In a preferred scheme, the raw material acid storage tank is connected with an acid agent inlet of the centrifugal extractor through an acid-resistant pump, and the acid-resistant pump is also connected with the first reaction kettle.
In the preferred scheme, a heavy phase outlet and a filter residue outlet of the centrifugal extractor are connected with a waste acid storage tank, a light phase outlet is connected with the first reaction kettle or/and the second reaction kettle, and the light phase outlet is also connected with a debugging oil storage tank.
In the preferred scheme, a liquid outlet of the first reaction kettle is connected with the second reaction kettle through a second oil transfer pump, and the liquid outlet of the first reaction kettle is also connected with a raw oil inlet of the centrifugal extractor through a metering pump.
In the preferred scheme, the alkali powder storage tank is connected with the conveyor through a belt scale, and the conveyor is connected with the second reaction kettle.
In the preferred scheme, the nature filter residue device includes filtering ponds and purification oil storage pond, and the filtering ponds are inside to be equipped with the filter screen, and through the backwash pump intercommunication between filtering ponds and the purification oil storage pond, backwash pump one end is passed filter screen and low side and is close to the filtering ponds bottom, the other end and purification oil storage pond intercommunication.
In the preferred scheme, a plurality of slag extracting pumps are arranged on the filter screen and are communicated with the caustic sludge pool.
The utility model provides a low-quality transformer oil recovery system of recycling utilizes centrifugal extraction machine to carry out the acidizing reaction to low-quality transformer oil and concentrated sulfuric acid, obtains once purifying oil, adds alkaline powder in once purifying oil, and the stirring is filtered and is obtained the secondary and purified oil, and the secondary after the processing purifies oil vacuum dehydration etc. and tests the standard that accords with recycle. The recycling system runs stably, and is matched with the existing adsorption-filtration module equipment for use, so that the quality of the regenerated oil is further improved, and the quality standard of the new oil or the running oil is met. The conversion of the utilization of the transformer oil from a resource-product-waste linear mode to a resource-product-waste-renewable resource circulation mode is promoted, the resource consumption is greatly reduced, the waste discharge is reduced, the elbow of the dual pressure of resources and the environment on the development of a power grid is relieved, and meanwhile, certain economic benefits can be generated. After the equipment process is optimized, the industrialization can be promoted. The method can be used for treating the degraded transformer oil in various regions after industrialization, and the treated transformer oil can be used as new transformer oil, so that the purchase quantity of the new transformer oil is reduced, and the cost is greatly saved.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a schematic view of the production system of the present invention;
FIG. 2 is a flow chart of a recycling method of the production system of the present invention;
in the figure: a first oil transfer pump 1; a raw oil storage tank 2; a debugging oil storage tank 3; a metering pump 4; a raw material acid storage tank 5; an acid-resistant pump 6; a waste acid storage tank 7; a second oil delivery pump 8; a filtration tank 9; a reflux pump 10; a purified oil storage tank 11; an alkaline residue pool 12; a slag extraction pump 13; a filter screen 14; a centrifugal extractor 15; a heavy phase outlet 1501; a light phase outlet 1502; an acid agent inlet 1503; a raw oil inlet 1504; a residue outlet 1505; a first reaction vessel 16; a second reaction vessel 17; a conveyor 18; an alkali powder storage tank 19; a belt scale 20.
Detailed Description
Example 1
As shown in fig. 1-2, a system for recycling low-quality transformer oil, a raw oil storage tank 2 or/and a debugging oil storage tank 3 are connected with a centrifugal extractor 15 through a metering pump 4, the centrifugal extractor 15 is further provided with a raw acid storage tank 5, the raw acid storage tank 5 is connected with the centrifugal extractor 15 through an acid-proof pump 6, the centrifugal extractor 15 is connected with a first reaction kettle 16 or/and a second reaction kettle 17, an alkali powder storage tank 19 is provided, the alkali powder storage tank 19 is connected with the second reaction kettle 17, and the second reaction kettle 17 is connected with an alkali residue filtering device. Neutralizing the primary purified oil treated by the centrifugal extractor 15, wherein the treatment process comprises the following steps: and adding alkaline powder into the primary purified oil, stirring and filtering to obtain secondary purified oil. The selected alkaline powder is used for treating oil products, the quality of the treated oil products is observed and tested, and the tests after the treatment such as vacuum dehydration of the treated secondary purified oil meet the GB2536-2011 'standard of unused mineral insulating oil for electrical fluid transformers and switches' and 'GB/T7595-2017' standard of transformer oil quality in operation.
Waste mineral oil and concentrated sulfuric acid are fed into a reaction kettle according to a certain proportion and stirred for a certain time, and then introduced into extraction equipment for reaction and extraction, wherein the light phase is primary purified oil, and the heavy phase is acidic waste liquid. The primary purified oil can be used for transformer oil of low voltage grade. Mixing and stirring the primary purified oil and the alkaline solid powder at a certain temperature for a period of time, filtering, and carrying out vacuum dehydration and other treatments to obtain the secondary purified oil meeting the requirement of GB/T7595 transformer oil quality in 2017 operation.
The regenerated oil product treated by the waste transformer oil through a small test device achieves the standard treatment cost of 400 yuan per ton of deteriorated oil in GB/T7595-2017 transformer oil quality operation, which is lower than 500 yuan per ton required by the technical specification; the standard of GB2536-2011 unused mineral insulating oil for electrical fluid transformers and switches is reached, the cost is 400 plus 800 yuan/ton, and is lower than 1000 yuan/ton required by technical specifications.
In a preferred scheme, the debugging oil storage tank 3 is connected with a raw oil inlet 1504 of the centrifugal extractor 15 through a metering pump 4, and the metering pump 4 is further connected with a first reaction kettle 16. The raw material acid storage tank 5 is connected to an acid agent inlet 1503 of the centrifugal extractor 15 via an acid-resistant pump 6, and the acid-resistant pump 6 is also connected to the first reaction vessel 16. The heavy phase outlet 1501 and the residue outlet 1505 of the centrifugal extractor 15 are connected with the waste acid storage tank 7, the light phase outlet 1502 is connected with the first reaction kettle 16 or/and the second reaction kettle 17, and the light phase outlet 1502 is also connected with the debugging oil storage tank 3. The centrifugal extractor 15 comprises a heavy phase outlet 1501, a light phase outlet 1502, an acid agent inlet 1503, a raw oil inlet 1504 and a filter residue outlet 1505, wherein the poor oil at the heavy phase outlet 1501 and the filter residue outlet 1505 is conveyed to the waste acid storage tank 7 for internal storage, and the raw oil inlet 1504 is used for conveying the crude oil. The light phase outlet 1502 delivers a primary purified oil that can be used for low voltage grade transformer oil or can be filtered for neutralization again.
In a preferable scheme, a liquid outlet of the first reaction kettle 16 is connected with the second reaction kettle 17 through a second oil transfer pump 8, and a liquid outlet of the first reaction kettle 16 is further connected with a raw oil inlet 1504 of the centrifugal extractor 15 through a metering pump 4. When the first reaction kettle 16 and the second reaction kettle 17 stop using, the light phase transformer oil in the first reaction kettle 16 and the centrifugal extractor 15 is conveyed to the debugging oil storage tank 3 for storage, and when the first reaction kettle 16 and the second reaction kettle 17 are reused, the light phase transformer oil in the raw oil storage tank 2 is conveyed to the centrifugal extractor 15, or the first reaction kettle 16, or the second reaction kettle 17 for heating, stirring and full acidification reaction.
In a preferable scheme, the alkali powder storage tank 19 is connected with the conveyor 18 through a belt scale 20, and the conveyor 18 is connected with the second reaction kettle 17. The belt scale 20 plays a role in weighing, and the conveyor 18 is used for conveying the alkali powder to the second reaction kettle 17.
In the preferred scheme, nature filter residue device includes filtering ponds 9 and purification oil storage pond 11, and filtering ponds 9 inside is equipped with filter screen 14, and filtering ponds 9 and purification oil storage pond 11 communicate through backwash pump 10 between, and backwash pump 10 one end is passed filter screen 14 and the low side is close to filtering ponds 9 bottom, the other end and purification oil storage pond 11 intercommunication. The filter screen 14 is provided with a plurality of slag extracting pumps 13, and the slag extracting pumps 13 are communicated with the alkali slag pool 12. The transformer oil in the second reaction kettle 17 is filtered by the filter screen 14 in the filter tank 9, the high-quality transformer oil is conveyed to the purified oil storage tank 11 through the reflux pump 10 for storage, and the alkaline residue above the filter screen 14 in the filter tank 9 is conveyed to the alkaline residue tank 12 through the residue extraction pump 13 for centralized storage.
Example 2
Referring to embodiment 1, as shown in fig. 1-2, a first oil transfer pump 1 transfers low-quality transformer oil to a raw oil storage tank 2, the low-quality transformer oil in the raw oil storage tank 2 is quantitatively transferred to the inside of a centrifugal extractor 15 by a metering pump 4, concentrated sulfuric acid in a raw acid storage tank 5 is transferred to the centrifugal extractor 15 by an acid-proof pump 6, the centrifugal extractor 15 is turned on, and the low-quality transformer oil is acidified by the concentrated sulfuric acid. The centrifugal extractor is CWL50-M type centrifugal extractor. The sulfuric acid concentration of the acid storage tank (5) is 98%, the addition amount is 20-30 kg per ton, the flow rate is as follows: the low-quality transformer oil waste oil is 150-. The scheme preferably selects 170l/h and 4h of low-quality transformer oil waste oil and 8.5l/h of sulfuric acid.
The light-phase transformer oil from the light-phase outlet 1502 of the centrifugal extractor 15 is conveyed to the first reaction kettle 16, and the concentrated sulfuric acid in the raw material acid storage tank 5 is conveyed to the first reaction kettle 16 for sufficient heating, stirring and sufficient acidification reaction.
When the first reaction kettle 16 and the second reaction kettle 17 stop using, the light phase transformer oil in the first reaction kettle 16 and the centrifugal extractor 15 is conveyed to the debugging oil storage tank 3 for storage, and when the first reaction kettle 16 and the second reaction kettle 17 are reused, the light phase transformer oil in the raw oil storage tank 2 is conveyed to the centrifugal extractor 15, or the first reaction kettle 16, or the second reaction kettle 17 for heating, stirring and full acidification reaction.
After the first reaction kettle 16 is heated, stirred and fully acidified, the light-phase transformer oil is conveyed into the second reaction kettle 17, the solid alkali powder in the alkali powder storage tank 19 is quantitatively conveyed into the second reaction kettle 17 through the belt scale 20, the light-phase transformer oil is neutralized and adsorbed, and the solid alkali powder is magnesium carbonate.
The transformer oil in the second reaction kettle 17 is filtered by the filter screen 14 in the filter tank 9, and the high-quality transformer oil is conveyed to the purified oil storage tank 11 by the reflux pump 10 for storage.
Conveying the caustic sludge above a filter screen 14 of the filter tank 9 to the caustic sludge tank 12 through a slag extraction pump 13 for centralized storage.
After the equipment is used together, the secondary purified oil is treated by the adsorbent to obtain tertiary purified oil, and the tertiary purified oil is subjected to vacuum dehydration to obtain quartic purified oil which can reach the standard of unused mineral insulating oil for GB2536-2011 electrical fluid transformers and switches and is used as oil for high-voltage-grade transformers.
The processing cost of the degraded transformer oil is about 400 yuan/ton, the processed oil can be used as new transformer oil, the purchase cost of the new transformer oil is about 7000 yuan/ton, the costs of transportation and the like are deducted according to the project of 50 tons, and the benefit is 23 ten thousand yuan/50 tons. The benefit after industrialization is 920 ten thousand yuan/2000 ton. The project has no carbon emission, 50 tons of degraded transformer oil are recycled, the consumption of the transformer oil is about 10:1 according to crude oil refining, the consumption of non-renewable petroleum resources is reduced by 500 tons, the emission of carbon dioxide generated by producing the petroleum product can be reduced by 140 tons, the current carbon emission price is 32 yuan/ton, the indirect benefit can be generated by 0.448 yuan/50 tons, and the post-industrialization benefit is 17.92 yuan/2000 tons.
Taking a Yuxian transformer substation as an example: when the deteriorated oil of Yuxian transformer station is treated, the production amount of acid sludge is about 50L/ton oil, the production amount of alkaline sludge is about 3 kg/ton oil, and the external treatment is required at present.
And after the qualification is obtained at the later stage, the whole production line can be free from waste discharge. After the whole process, an electric rotary kiln, an alkali liquor absorption tower, an induced draft fan, a chimney and the like are added, so that the problems of acid sludge, alkali sludge and harmful gas generated in the process can be solved, and a sulfate product is a byproduct.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (8)
1. The utility model provides a low-quality transformer oil recovery system of recycling, characterized by: raw oil storage tank (2) or debugging oil storage tank (3) are connected with centrifugal extraction machine (15) through measuring pump (4), centrifugal extraction machine (15), still be equipped with raw materials acid storage tank (5), raw materials acid storage tank (5) are connected with centrifugal extraction machine (15) through acid-proof pump (6), centrifugal extraction machine (15) are connected with first reation kettle (16) or/and second reation kettle (17), be equipped with alkali powder storage tank (19), alkali powder storage tank (19) are connected with second reation kettle (17), second reation kettle (17) are connected with alkaline filter residue device.
2. The system of claim 1, wherein the system comprises: the debugging oil storage tank (3) is connected with a raw oil inlet (1504) of the centrifugal extractor (15) through a metering pump (4), and the metering pump (4) is also connected with the first reaction kettle (16).
3. The system of claim 1, wherein the system comprises: the raw material acid storage tank (5) is connected with an acid agent inlet (1503) of the centrifugal extractor (15) through an acid-proof pump (6), and the acid-proof pump (6) is also connected with the first reaction kettle (16).
4. The system of claim 1, wherein the system comprises: a heavy phase outlet (1501) and a filter residue outlet (1505) of the centrifugal extractor (15) are connected with a waste acid storage tank (7), a light phase outlet (1502) is connected with a first reaction kettle (16) or/and a second reaction kettle (17), and the light phase outlet (1502) is also connected with a debugging oil storage tank (3).
5. The system of claim 1, wherein the system comprises: the liquid outlet of the first reaction kettle (16) is connected with the second reaction kettle (17) through a second oil transfer pump (8), and the liquid outlet of the first reaction kettle (16) is also connected with a raw oil inlet (1504) of a centrifugal extractor (15) through a metering pump (4).
6. The system of claim 1, wherein the system comprises: the alkali powder storage tank (19) is connected with the conveyor (18) through the belt scale (20), and the conveyor (18) is connected with the second reaction kettle (17).
7. The system of claim 1, wherein the system comprises: the alkaline residue filtering device comprises a filtering tank (9) and a purified oil storage tank (11), a filtering screen (14) is arranged inside the filtering tank (9), the filtering tank (9) and the purified oil storage tank (11) are communicated through a reflux pump (10), one end of the reflux pump (10) penetrates through the filtering screen (14) and the lower end of the reflux pump is close to the bottom of the filtering tank (9), and the other end of the reflux pump is communicated with the purified oil storage tank (11).
8. The system of claim 7, wherein the system comprises: a plurality of slag extracting pumps (13) are arranged on the filter screen (14), and the slag extracting pumps (13) are communicated with the alkaline residue pool (12).
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| CN202120835923.4U CN214830137U (en) | 2021-04-22 | 2021-04-22 | Low-quality transformer oil recycling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113201365A (en) * | 2021-04-22 | 2021-08-03 | 孝感市光源电力集团有限责任公司 | Low-quality transformer oil recycling system and recycling method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113201365A (en) * | 2021-04-22 | 2021-08-03 | 孝感市光源电力集团有限责任公司 | Low-quality transformer oil recycling system and recycling method thereof |
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