CN216726146U - Oily sludge resource utilization system - Google Patents

Abstract

The utility model relates to the field of sludge treatment, in particular to a resource utilization system for oily sludge, which comprises a pretreatment unit and an incineration unit; the pretreatment unit comprises a residual oil separation tank, a double-layer rotary screen, a settling tank, a middle tank and an oil storage tank which are connected in sequence; a spiral elevator is arranged at a feed inlet of the residual oil separating tank, a sieve plate is arranged inside the residual oil separating tank, and a screen mesh is arranged inside the double-layer rotary screen; the incineration unit comprises a power plant boiler and a spray gun, and the spray gun is connected between the oil storage tank and the boiler; conveying units are arranged between the boiler and the residual oil separating tank and between the boiler and the double-layer rotary screen. The scheme realizes harmless and resource treatment and utilization of the oil-containing sludge.

Description

Oily sludge resource utilization system

Technical Field

The utility model relates to the field of sludge treatment, in particular to a resource utilization system for oil-containing sludge.

Background

With the development of industrial economy, the quantity of industrial hazardous wastes is continuously increased, particularly the production quantity of oily sludge is increased year by year, and the production sources mainly comprise the following aspects: 1. refinery oily sludge, storage and transportation oily sludge and oilfield oily sludge produced in the petroleum industry; 2. waste engine oil generated by lubricating mechanical equipment, oily waste generated by cleaning equipment and the like; 3. the organic chemical industry produces waste hydrocarbon organic pollutants.

The oily sludge contains a large amount of toxic substances, and if the oily sludge is directly discharged to the environment without being treated, the properties of soil can be changed, so that nutrient substances in the soil are reduced, the soil is hardened, and the growth and development of plants are not facilitated. Due to high viscosity, the oily sludge is easy to adhere to the surface of soil, so that the humidity of the soil is reduced, the water penetration function of the soil is influenced, and the water storage capacity of the soil is reduced.

At present, the treatment technology aiming at the oily sludge mainly comprises the processes of chemical cleaning, thermal extraction, incineration, distillation, refining and the like. The chemical cleaning method and the thermal extraction method are not thorough in treatment, the generated residues also belong to hazardous wastes, secondary treatment is needed, and the treatment cost is high; the incineration disposal site is strict, the cost is high, the energy consumption is large, the coking is easy, the technical requirement is higher, and the comprehensive utilization of 'resource' is not well realized; the distillation and refining process is mainly to distill and refine hydrocarbon substances in the sludge with high oil content to obtain light solvent oil, and is not suitable for the sludge with low oil content. The oil content of the oil sludge generated by cleaning general equipment, oil tanks of industrial enterprises and gas stations is low, the operation cost of distillation and re-refining is high, and the recycling value of the sludge with low oil content is low. Therefore, a new waste disposal outlet needs to be opened up, and a short plate with low sludge recycling value needs to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a resource utilization system for oil-containing sludge so as to realize harmless and resource treatment and utilization of the oil-containing sludge.

In order to achieve the purpose, the utility model adopts the following technical scheme: a resource utilization system for oily sludge comprises a pretreatment unit and an incineration unit; the pretreatment unit comprises a residual oil separation tank, a double-layer rotary screen, a settling tank, a middle tank and an oil storage tank which are connected in sequence; a spiral elevator is arranged at a feed inlet of the residual oil separating tank, a sieve plate is arranged inside the residual oil separating tank, and a screen mesh is arranged inside the double-layer rotary screen; the incineration unit comprises a power plant boiler and a spray gun, and the spray gun is connected between the oil storage tank and the boiler; and conveying units for conveying sludge are arranged between the boiler and the residual oil separating tank and between the boiler and the double-layer rotary screen.

The principle and the advantages of the scheme are as follows: solid oily sludge and semi-solid oily sludge are lifted by a screw elevator to enter a feed inlet of a residual oil separating tank; the sieve plate is arranged in the residual oil separation tank and used for filtering sludge, larger particles are isolated by the sieve plate, and sludge with smaller particles enters the bottom of the residual oil separation tank through sieve holes of the sieve plate. And (3) conveying the liquid oil sludge in the residual oil separation tank to a double-layer rotary screen, further filtering the liquid oil sludge under the action of the screen, isolating and screening out particles with larger diameters, and feeding the mixed liquid with smaller particle sizes into a settling tank. The mixed liquid entering the settling tank is subjected to oil-water separation under the action of gravity, and the separated oil mixed liquid enters the oil storage tank for later use after passing through the intermediate tank. The large-particle impurities separated by the residual oil separating tank and the larger-particle impurities separated by the double-layer rotary screen are conveyed by the conveying unit, the large-particle impurities are conveyed into the boiler, and the impurities are mixed with the fire coal and then are combusted in the boiler. Meanwhile, the oil slurry liquid in the oil storage tank is sprayed out through the spray gun, the sprayed oil slurry liquid is in contact with air in the boiler and is fully combusted, so that on one hand, the consumption of auxiliary fuel of the boiler is saved, on the other hand, the contact area of the oil slurry liquid and the air in the boiler is large, and harmful substances in the oil slurry liquid can be heated, completely decomposed and burnt out in the boiler.

According to the scheme, the resource utilization system for the oily sludge provided by the utility model has the following beneficial effects:

1. by means of boiler combustion of the existing power plant, the treatment cost of the oily sludge is greatly reduced, oil and harmful substances can be eliminated, the oil substances are recycled through combustion of the oily sludge slurry, consumption of auxiliary fuel is reduced, and consumption of fire coal is reduced. 2. The separated large-particle impurities are mixed with the fire coal and then combusted, and no secondary waste is generated in the whole process. 3. The flue gas after burning utilizes the flue gas treatment facilities such as current denitration of power plant, dust removal, desulfurization to manage, discharges the atmosphere after reaching standard, has reduced the pollution to the environment. The slag and the fly ash are used as building materials for resource utilization, and the aims of harmless and resource comprehensive utilization of the oil-containing sludge are fulfilled.

Preferably, as an improvement, a slag scraping device is arranged at the bottom of the residual oil separation tank, the slag scraping device comprises a first transmission motor and a slag scraping belt, rotating rollers are arranged at two ends of the slag scraping belt, the rotating rollers are rotatably connected to the bottom of the residual oil separation tank, and a scraper is fixedly connected to the slag scraping belt. Therefore, the first driving motor drives the residue scraping belt to drive the rotating roller, the residue scraping belt drives the scraper to scrape the sediment at the bottom of the residual oil separating tank, so that the sediment at the bottom of the residual oil separating tank is scraped out of the residual oil separating tank, and the automatic cleaning of the sediment at the bottom of the residual oil separating tank is realized.

Preferably, as an improvement, the bottom of the residual oil separation tank is connected with a sludge discharge machine, the sludge discharge machine comprises a second transmission motor and a sludge discharge belt, two ends of the sludge discharge belt are both provided with rotating rollers, and the sludge discharge machine is provided with a sludge discharge outlet. Therefore, the second transmission motor drives the sludge discharge belt to transmit on the rotating roller, the sludge discharge belt conveys the sediment scraped by the slag scraping device to the sludge discharge outlet, and the scraped sediment is discharged from the sludge discharge outlet.

Preferably, as an improvement, a stirrer is provided on the top of the residue separation tank. The stirrer is used for stirring the sludge entering the residual oil separation tank, so that the sludge can be uniformly dispersed, and the sludge filtering effect can be improved.

Preferably, as an improvement, the residual oil separation tank, the settling tank and the oil storage tank are respectively provided with a heating coil. The heating coil is used for heating the sludge, so that the oil sludge liquid in the sludge can be in a normal flowing state, and the solidification of the oil sludge liquid is avoided.

Preferably, as an improvement, the spray gun further comprises a transfer box, and the transfer box is connected between the oil storage tank and the spray gun. The transfer box is arranged to have the following functions: 1. can play a role in precipitating and filtering the sludge fuel. 2. The oil sludge pretreatment system is far away from the boiler, and the transfer box has the effects of intermediate relay and fluid pressure stabilization. 3. The temperature is raised in the transfer box, the oil temperature of the oil conveyed to the spray nozzle of the spray gun is maintained, and the viscosity and the atomized granularity of the oil sludge slurry are ensured. 4. The residual oil sludge can flow back to the transfer box after the spray gun nozzle adjusts the injection quantity according to the working condition.

Preferably, as an improvement, be equipped with first fuel delivery pump between intermediate tank and the oil storage tank, be equipped with the second fuel delivery pump between oil storage tank and the transfer box, be equipped with the third fuel delivery pump between transfer box and the spray gun. Thereby, the oil slurry liquid in the intermediate tank can enter the oil storage tank through the first oil transfer pump. And the oil slurry liquid in the oil storage tank can enter the transfer box through the second oil transfer pump. And the oil slurry liquid in the transfer box can enter the spray gun through the third oil transfer pump.

Preferably, as an improvement, the top of the settling tank is provided with an oil inlet and an oil outlet, and the bottom of the settling tank is provided with a water outlet. The sludge is separated from oil and water in the settling tube, and the oil floats above the water, so that the water outlet is arranged at the bottom of the settling tank, and the water is convenient to discharge. And the oil outlet is arranged at the top of the settling tank and can discharge oil.

Preferably, as a modification, the first drive motor is located at the top of the resid knockout vessel. Therefore, the first drive motor is not influenced by the sludge in the residual oil separation tank, and the first drive motor can normally work.

Preferably, as a refinement, the spray gun is an atomizing spray gun. Thus, the slurry ejected from the spray gun is in a mist form, and the slurry is well mixed with air.

Drawings

FIG. 1 is a frame diagram of a resource utilization system for oily sludge.

FIG. 2 is a block diagram of a pretreatment unit.

Fig. 3 is a front view of a resid knockout vessel.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a side view of a resid knockout vessel.

Fig. 6 is a front view of the settling tank.

Fig. 7 is a side view of a settling tank.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a spiral elevator 1, a residual oil separation tank 2, a double-layer rotary screen 3, a settling tank 4, a middle tank 5, a first oil transfer pump 6, a heating coil pipe 7, an oil storage tank 8, a second oil transfer pump 9, a transfer box 10, a third oil transfer pump 11, a sludge discharge outlet 12, a second transmission motor 13, a sludge discharge machine 14, a transmission piece 15, a residue scraping belt 16, a first transmission motor 17, a sieve plate 18, an oil collecting pipe 19, a stirring machine 20, an oil inlet 21, an oil outlet 22 and a water discharge outlet 23.

The embodiment is substantially as shown in figures 1 to 7 of the accompanying drawings: a resource utilization system for oily sludge comprises a pretreatment unit and an incineration unit. The pretreatment unit comprises a residual oil separation tank 2, a double-layer rotary screen 3, a settling tank 4, an intermediate tank 5 and an oil storage tank 8 which are connected in sequence. A spiral elevator 1 is arranged at a feed inlet of the residual oil knockout drum 2, and as shown in a combined figure 2-figure 5, a sieve plate 18 is arranged inside the feed inlet of the residual oil knockout drum 2, and the sieve plate 18 is a sieve plate 18 with 10 x 10 mm; the bottom of the residual oil separating tank 2 is provided with a slag scraping device, the slag scraping device in the embodiment comprises a first transmission motor 17 and a slag scraping belt 16, and the first transmission motor 17 is arranged at the top of the residual oil separating tank 2 through a bolt. The two ends of the slag scraping belt 16 are provided with rotating rollers, the roller shafts of the rotating rollers are rotatably connected to the bottom of the residual oil separation tank 2 through bearings, scraping plates are clamped on the outer surface of the slag scraping belt 16 and fixedly connected or bonded through screws, a transmission member 15 is connected between the first transmission motor 17 and the rotating rollers at the left end of the slag scraping belt 16, and the transmission member 15 can be a belt or a chain. The bottom of the residual oil separation tank 2 is connected with a sludge discharge machine 14, the sludge discharge machine 14 comprises a sludge discharge pipe, a second transmission motor 13 and a sludge discharge belt, two ends of the sludge discharge belt are respectively provided with a rotating roller, the roller shafts of the rotating rollers at two ends of the sludge discharge machine 14 rotate in the sludge discharge pipe through bearings, and the left end of the sludge discharge machine 14 is provided with a sludge discharge outlet 12. An output shaft of the second transmission motor 13 is connected with the rotating roller on the sludge discharging machine 14 through a flat key, so that the rotating roller on the sludge discharging machine 14 is directly driven to rotate. A stirrer 20 is arranged on the top of the residual oil separating tank 2. The right end of the top of the residual oil separating tank 2 is connected with an oil collecting pipe 19, and the oil collecting pipe 19 is connected with the double-layer rotary screen 3. The double-layer rotary screen 3 is internally provided with a screen mesh which is a 2 x 2mm screen mesh. Referring to fig. 6, the left end of the top of the settling tank 4 is provided with an oil inlet 21 for connecting the liquid outlet of the double-layer drum sieve 3, the right end of the top of the settling tank 4 is provided with an oil outlet 22, an oil delivery pipe is connected between the oil inlet 21 of the double-layer drum sieve 3 and the settling tank 4, the oil delivery pipe is inclined, and the oil delivery pipe is connected at the lower end of the settling tank 4. The bottom of the settling tank 4 is provided with a water outlet 23.

The unit of burning includes power boiler and spray gun, and the spray gun is connected between oil storage tank 8 and boiler, still is equipped with transport box 10 between spray gun and the oil storage tank 8. Between oil-out 22 and the intermediate tank 5 of the right-hand member of settling cask 4, between intermediate tank 5 and the oil storage tank 8, between oil storage tank 8 and the transfer box 10, all be connected with defeated oil pipe between transfer box 10 and the spray gun, be equipped with first petroleum pump 6 between intermediate tank 5 and the oil storage tank 8, be equipped with second petroleum pump 9 between oil storage tank 8 and the transfer box 10, be equipped with third petroleum pump 11 between transfer box 10 and the spray gun. The spray gun in this embodiment is an atomizing spray gun. Residual oil knockout drum 2 in this embodiment, settling cask 4, all be equipped with heating coil 7 on oil storage tank 8 and the transfer box 10, heating coil 7 includes the pipeline and is located the heater strip of pipeline, heating coil 7 twines respectively on 2 inner walls of residual oil knockout drum, 4 inner walls of settling cask, on 8 inner walls of oil storage tank and the inner wall on the transfer box 10, residual oil knockout drum 2, settling cask 4, oil storage tank 8 and transfer box 10 all establish the heat preservation outward, the heat preservation intussuseption is filled with insulation material, for example, foam, glass cotton or rock wool etc..

As shown in fig. 1, the device further comprises a temporary storage tank, wherein the particle impurities separated by the residual oil separation tank 2 and the double-layer rotary screen 3 are temporarily stored in the temporary storage tank, a compatibility unit, a coal conveying unit, a coal crusher, a silo and a coal feeder are sequentially arranged between the temporary storage tank and the boiler, the compatibility unit is a box body, and a vibrator is arranged on the box body, so that the mixing of coal and sludge impurities can be realized. The coal conveying units are all conveyor belts, so that coal and sludge can be conveyed. In the embodiment, conveying units are arranged between the boiler and the residual oil separating tank 2 and between the boiler and the double-layer rotary screen 3, and are conveying belts, so that particle impurities in the residual oil separating tank 2 and particle impurities in the double-layer rotary screen 3 can be conveyed to the temporary storage tank through the conveying units, and sludge impurities in the temporary storage tank are conveyed to the compatibility unit.

The specific implementation process is as follows:

solid oily sludge and semi-solid oily sludge are packaged by a ton barrel, are guided into a spiral elevator 1 through a forklift, and are lifted into a feed inlet of a residual oil separating tank 2 through the spiral elevator 1; a10 x 10mm sieve plate 18 is arranged at a feed inlet of a residual oil separation tank 2, the temperature is raised to 80-90 ℃ through a heating coil 7 in the tank, sludge is melted through the temperature rise, under the combined action of the sieve plate 18, large-block aggregated sludge is fluidized through melting, particles larger than 10mm in the sludge are isolated by the sieve plate 18, and sludge smaller than 10mm enters the bottom of the residual oil separation tank 2 through sieve holes of the sieve plate 18. The bottom of the residual oil separating tank 2 is provided with a slag scraping device, when the slag scraping device works, the first driving motor 17 drives the slag scraping belt 16 to drive on the rotating roller, and the slag scraping belt 16 drives the scraper to scrape sediment at the bottom of the residual oil separating tank 2, so that the sediment at the bottom of the residual oil separating tank 2 is scraped out of the residual oil separating tank 2, and the sediment at the bottom of the residual oil separating tank 2 is automatically cleaned. Meanwhile, the second transmission motor 13 drives the sludge discharge belt to transmit on the rotating roller, the sludge discharge belt transports the sediment scraped by the slag scraping device to the sludge discharge outlet 12, and the scraped sediment is discharged from the sludge discharge outlet 12.

The melted and fluidized oil-containing sludge automatically flows into the double-layer rotary screen 3 through an oil collecting pipe 19 at the upper part of the residual oil separation tank 2. The liquid oil sludge passes through a 2 x 2mm screen meshAnd (4) screening, wherein particles with the diameter larger than 2mm are isolated and screened out, and the mixed liquid with the particle size below 2mm enters a settling tank 4 with a built-in heating coil 7. The mixed liquid entering the settling tank 4 is subjected to oil-water separation under the action of gravity, the water at the bottom is discharged through a water outlet 23, and the mixed liquid at the upper part enters the intermediate tank 5 through an oil outlet 22 and is then conveyed to the oil storage tank 8 with the built-in heating coil pipe 7 by the first oil conveying pump 6 for standby. The pretreated sludge slurry is supplied to 10m in the vicinity of the boiler by a second oil feed pump 9³And in a transfer box 10 with a built-in heating coil 7, the oil is conveyed to a spray gun through a third oil conveying pump 11, and the spray gun sprays oil slurry liquid into the boiler for combustion.

Meanwhile, the granular impurities separated by the residual oil separating tank 2 and the double-layer rotary screen 3 are conveyed to the temporary storage tank for temporary storage by a conveying unit (a conveying belt). Then the particle impurities in the temporary storage pool are conveyed to the matching unit through the conveying unit (conveying belt), the conveyed particle impurities are mixed with the fire coal in the matching unit, then the matching unit discharges the fire coal and the sludge impurities to the coal conveying unit, the coal conveying unit sequentially transmits the fire coal and the sludge impurities to the coal crusher, the silo and the coal feeder, and finally the coal feeder puts the fire coal and the sludge impurities into the boiler for combustion. Flue gas generated by combustion is introduced into a chimney with the height of 210m by an induced draft fan after denitration, dry desulfurization treatment in the furnace and dust removal by an electrostatic dust collector. The separated product and the collected dust can be utilized, and the fly ash and the slag are transported to a cement plant to be used as a cement substitute raw material to form the final product cement.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (10)

1. The utility model provides an oily sludge resource utilization system which characterized in that: comprises a pretreatment unit and an incineration unit; the pretreatment unit comprises a residual oil separation tank, a double-layer rotary screen, a settling tank, an intermediate tank and an oil storage tank which are connected in sequence; a spiral elevator is arranged at a feed inlet of the residual oil separation tank, a sieve plate is arranged inside the residual oil separation tank, and a screen mesh is arranged inside the double-layer rotary screen; the incineration unit comprises a power plant boiler and a spray gun, and the spray gun is connected between the oil storage tank and the boiler; and conveying units for conveying sludge are arranged between the boiler and the residual oil separating tank and between the boiler and the double-layer rotary screen.

2. The oily sludge resource utilization system according to claim 1, which is characterized in that: the bottom of the residual oil separating tank is provided with a slag scraping device, the slag scraping device comprises a first transmission motor and a slag scraping belt, two ends of the slag scraping belt are provided with rotating rollers, the rotating rollers are rotatably connected to the bottom of the residual oil separating tank, and a scraper is fixedly connected to the slag scraping belt.

3. The oily sludge resource utilization system according to claim 2, characterized in that: the bottom of the residual oil separation tank is connected with a sludge discharge machine, the sludge discharge machine comprises a second transmission motor and a sludge discharge belt, two ends of the sludge discharge belt are provided with rotating rollers, and a sludge discharge outlet is formed in the sludge discharge machine.

4. The oily sludge resource utilization system according to claim 1, which is characterized in that: and a stirrer is arranged on the top of the residual oil separating tank.

5. The oily sludge resource utilization system according to claim 1, which is characterized in that: heating coils are arranged on the residual oil separating tank, the settling tank and the oil storage tank.

6. The oily sludge resource utilization system according to claim 1, which is characterized in that: still include the transfer case, the transfer case is connected between oil storage tank and spray gun.

7. The resource utilization system for the oily sludge according to claim 6, which is characterized in that: be equipped with first fuel delivery pump between intermediate tank and the oil storage tank, be equipped with the second fuel delivery pump between oil storage tank and the transfer box, be equipped with the third fuel delivery pump between transfer box and the spray gun.

8. The oily sludge resource utilization system according to claim 1, which is characterized in that: the top of settling cask is equipped with oil inlet and oil-out, the bottom of settling cask is equipped with the outlet.

9. The oily sludge resource utilization system according to claim 2, characterized in that: the first drive motor is located at the top of the resid knockout vessel.

10. The oily sludge resource utilization system according to claim 1, which is characterized in that: the spray gun is an atomizing spray gun.

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