CN212293246U - Pretreatment device and pretreatment system for oily sludge - Google Patents
Pretreatment device and pretreatment system for oily sludge Download PDFInfo
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- CN212293246U CN212293246U CN202020409677.1U CN202020409677U CN212293246U CN 212293246 U CN212293246 U CN 212293246U CN 202020409677 U CN202020409677 U CN 202020409677U CN 212293246 U CN212293246 U CN 212293246U
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Abstract
The utility model discloses a preprocessing device and pretreatment systems of oiliness mud. The pretreatment device is a hollow tank body, the middle part of the tank body is provided with an oily sludge inlet, a dissolved air water gap and a medicine feeding port, and the middle part in the tank body is provided with a dissolved air releaser; the bottom of the tank body is provided with a first sludge outlet. The oily sludge pretreatment device is safe and reliable, convenient to operate, small in occupied area and proper in operation load, can effectively separate three phases of sludge, oil and water in oily sludge, can remarkably improve the cleaning effect and the oil collecting function of the oily sludge, and greatly reduces the load of subsequent treatment. The pretreatment system can realize the on-site rapid pretreatment and reduction of a large amount of oily sludge generated in the construction operation and ground production processes of oil wells with high oil content, high water content and high solid content in dispersed blocks.
Description
Technical Field
The utility model relates to an oily sludge treatment technical field especially relates to an oily sludge's preprocessing device and pretreatment systems, and wherein oily sludge is produced in oil field development and the production process.
Background
A large amount of oily sludge, such as sludge produced by a sewage treatment system, oil tank bottom sludge, sludge formed after oil leaked from various pipeline equipment pollutes soil, drilling mud, fracturing produced sludge and the like, can be produced in the oil field development operation and ground production processes.
If the sludge and oil tank bottom sludge generated by the sewage treatment system are not cleaned in time, the treatment efficiency and the treatment effect of the equipment are reduced, and the running load of the equipment is increased. For example, if sludge generated in the oil-water settling separation equipment in the sewage treatment system and bottom sludge of the oil tank are not cleaned in time, on one hand, the space for oil-water settling separation in the treatment equipment is reduced; on the other hand, the sludge and the oil tank bottom mud are in 'dead circulation' in a sewage treatment system, and the effluent quality and the oil-water settling separation effect are influenced.
Sludge and oil tank bottom sludge cleaned from a sewage treatment system, soil polluted by leaked oil, drilling mud and fracturing produced sludge, wherein the oil content is up to more than 30%, and if the sludge and the oil tank bottom sludge are directly discharged, the environment is polluted and ecological damage is caused.
In recent years, the oil field produces oil-containing sludge with the yield of about 15.7 multiplied by 10 per year4m3And the production amount is also increasing year by year. Moreover, with the large-scale implementation of various chemical oil-flooding technologies, various treatment tanks in the treatment process of oilfield produced liquid can also generate a large amount of oily sludge, and the components of the oily sludge are complex, so that great difficulty is brought to the treatment of the oily sludge.
At present, the oily sludge mostly adopts a pretreatment process of 'fluidization pretreatment, tempering and centrifugation', namely: the method comprises the steps of firstly, carrying out primary screening on the oily sludge according to the particle size by a fluidization pretreatment device (mainly comprising a feeding station, a drum type sorting device, an aeration sand setting treatment device, a spiral conveying device and a full-automatic PLC control device), then further cleaning, homogenizing, heating and tempering the fluidized sludge after fluidization pretreatment by an oily sludge tempering device (mainly comprising a tempering tank, a sludge lifting pump, a stirrer and the like), and finally carrying out solid-liquid separation on the sludge by a centrifugal treatment unit. And (4) conveying the pretreated sludge to a sludge incineration treatment station for subsequent incineration or pyrolysis. However, the fluidization pretreatment at the front end of the pretreatment process uses more equipment, the equipment occupies a large area, the operation load is low, and three phases of oil, water and sludge cannot be thoroughly separated, so that the standard reaching rate of the pretreated sludge is unstable.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical defects in the prior art, and provides a pretreatment device (1) for oily sludge capable of effectively separating oil, water and mud phases on the first aspect, which is a hollow tank body (15), wherein the middle part of the tank body is provided with an oily sludge inlet (16), a dissolved gas water gap (21) and a dosing port (22), and the middle part in the tank body is provided with a dissolved gas releaser (23); the oily sludge inlet, the dissolved air water gap and the medicine feeding port are communicated with the tank body through a dissolved air releaser; the bottom of the tank body is provided with a first sludge outlet (19).
A stirrer (24) is arranged at the bottom in the tank body.
The dissolved air releaser comprises a plurality of round pipes which are arranged in parallel, holes are uniformly distributed on the round pipes, one end of each round pipe is communicated with the oily sludge inlet, the dissolved air water gap and the dosing port, and the other end of each round pipe is sealed.
The gas dissolving water gap and the chemical adding port are both arranged in the oily sludge inlet.
The oily sludge inlet, the dissolved air water gap and the medicine feeding port are communicated with the tank body through the holes of the dissolved air releaser.
The inside of jar body opposite side is equipped with one and jar body top vertical connection and to jar baffle (25) that the body bottom extends, and the baffle extends to jar body middle and lower part, and first delivery port (20) are located and are close to jar body lateral wall upper portion of baffle side.
The dosing port is connected with a dosing device (3) which provides a demulsifier and a cleaning agent for the pretreatment device.
The gas dissolving water port is connected with a pressure gas dissolving water tank (2) which provides gas dissolving water for the pretreatment device.
An oil receiving groove (17) is formed in the upper portion of one side of the tank body, an oil inlet of the oil receiving groove is located in the top of the tank body, and a first dirty oil outlet (18) is located in the lower portion of the oil receiving groove.
In a second aspect, the invention provides a pretreatment system for oily sludge, which can effectively reduce the oil content in the oily sludge, and comprises the pretreatment device (1) and a two-phase horizontal screw centrifugal dehydrator (6), wherein a first sludge outlet is communicated with a sludge inlet of the two-phase horizontal screw centrifugal dehydrator.
The utility model discloses a be equipped with dissolved gas releaser among the preprocessing device, receive the oil groove and be used for the baffle of water proof, can carry out effectual separation to mud, oil, water three-phase among the oily sludge, can show the cleaning performance and the deoiling function that improve oily sludge, alleviate the load that follow-up equipment handled oily sludge by a wide margin. The utility model provides an oily sludge pretreatment system is the equipment of portable skid-mounted ization, safe and reliable, convenient operation, area is little, the running load is suitable, but each equipment skid-mounted removes, be convenient for transportation and field assembly satisfy the needs that the mud preliminary treatment construction operation was carried out at any time in the oil field, can realize the quick preliminary treatment on the spot and the minimizing of a large amount of oily mud that produce in the oil well construction operation of high oiliness, high watery and high solid content of dispersed block and the ground production process.
Drawings
FIG. 1 is a schematic structural view of the oily sludge pretreatment device of the present invention;
FIG. 2 is a schematic structural view of the oily sludge pretreatment system of the present invention;
the device comprises an oily sludge pretreatment device (1), a tank body (15), an oily sludge inlet (16), a dosing port (22), a dissolved air water gap (21), a dissolved air releaser (23), a first sludge outlet (19), a stirrer (24), a baffle (25), a first water outlet (20), an oil receiving tank (17), a first dirty oil outlet (18), a pressure dissolved air water tank (2) and a dosing device (3);
a two-phase horizontal screw centrifugal dehydrator (6), a sludge recovery tank (4) and a lift pump (5).
Detailed Description
The present invention will be described in more detail and further illustrated with reference to specific examples, which are not intended to limit the present invention in any way.
The oily sludge pretreatment device 1 of the present embodiment has a cylindrical hollow tank body 15, as shown in fig. 1 and 2. An oil receiving groove 17 is arranged at the top of one side of the tank body 15, and the oil receiving groove 17 is connected with a first sump oil outlet 18 arranged at the upper part of the tank body. The inside of the another side of the tank body 15 is provided with a baffle 25, the baffle 25 is connected with the top of the tank body 15 and is parallel to the side wall of the tank body 15, the baffle extends to the middle lower part in the tank body 15 towards the bottom of the tank body 15, the baffle 25 is used for dividing the inside of the tank body 15 into two spaces of large and small parts, so that the oil floating to the surface and the water in the lower layer are separated, the upper part of the smaller space formed by the baffle 25 and the tank body 15 is provided with a first water outlet 20, and the first water outlet 20 is arranged on the side wall of the tank body 15 in the smaller space and is connected with. The bottom of the tank body 15 is provided with a first sludge outlet 19 which discharges the settled and separated sludge and is connected with the sludge recovery tank 4.
The middle part of one side of the tank body 15 is provided with an oily sludge inlet 16, a gas dissolving water gap 21 and a chemical adding opening 22, and the gas dissolving water gap 21 and the chemical adding opening 22 are both arranged in the oily sludge inlet 16. The dissolved air water port 21 and the chemical feeding port 22 are respectively connected with the dissolved air water outlet of the pressure dissolved air water tank 2 and the chemical outlet of the chemical feeding device 3, and the dissolved air water generated by the pressure dissolved air water tank 2 and the demulsifier and the cleaning agent stored in the chemical feeding device 3 are guided into the tank body 15 together with the oil-containing sludge. Be equipped with dissolved gas releaser 23 in the jar body 15, dissolved gas releaser 23 establishes at the middle part, for a plurality of pipes that arrange side by side, evenly distributed hole on the pipe, and one end is linked together with the end of oily sludge import 16, and the other end seals, promptly: the oil-containing sludge, the dissolved air water, the demulsifier and the cleaning agent are introduced into the dissolved air releaser 23 in the tank body 15 through the oil-containing sludge inlet 16 and are released into the tank body 15 through the holes of the dissolved air releaser 23.
In the jar body 15, the oily sludge mixes with the dissolved air water for on the oil droplet in the oily sludge adheres to the microbubble of dissolving the air water, exert the gas flotation effect to oily sludge, the demulsifier will wrap up oil, water, mud together and separate, and then the cleaner washs the oil in the mud phase to water phase, promptly: the oily sludge, the dissolved air water and the demulsifier are mixed and pass through the holes of the dissolved air releaser 23 to enter the tank body 15 together, micro bubbles in the dissolved air water are released and float up due to pressure reduction, oil droplets attached to a carrier belt float up together in the micro bubbles floating process, the oil droplets coalesce and gradually increase in particle size to form oil droplets until floating oil is formed and float on the surface of the water phase of the tank body, and when the liquid level reaches the top of the tank body, dirty oil overflows into the oil receiving tank and is discharged through a first dirty oil outlet 18 communicated with the oil receiving tank, so that the separation of the oil phase is realized; heavy sludge in the oily sludge is released by the dissolved gas releaser 23, then settles to the lower part of the tank body 15 due to gravity, and is discharged from a first sludge outlet 19 at the bottom (enters the sludge recovery tank 4), so that the separation of sludge phase is realized; after standing still in the tank body, the water released by the dissolved air releaser 23 flows into the tank body space between the baffle and the first water outlet 20 under the action of the baffle, and then the oily sewage containing fine particle impurities is discharged through the first water outlet 20 on the tank body 15, so that the separation of the water phase is realized.
The tank body 15 is also internally provided with a stirrer 24, and a stirring paddle of the stirrer 24 is arranged at the bottom of the tank body 15, so that sludge settled at the bottom of the tank body 15 can be conveniently discharged out of the tank body 15. The agitator 24 is used when the tank 15 needs to discharge sludge.
The utility model discloses it is big to current oily sludge output, the immature scheduling problem of processing system still provides an oily sludge's pretreatment systems, as shown in fig. 2, including above-mentioned oily sludge pretreatment devices, two-phase spiral shell centrifugal dehydrator 6 that crouches, main treatment facility such as charge device 3, be equipped with additional corollary equipment such as metering device and valve again, formed one set of mobilizable oily sludge pretreatment systems of skid-mounted, the mud moisture content after this pretreatment systems handles is less than or equal to 60%, the oil content is less than or equal to 10%, can transport to the incineration disposal station of follow-up centralized processing mud and burn innocent treatment, satisfy the needs of oil field production.
Except for the oily sludge pretreatment apparatus 1, all the apparatuses were commercially available products such as a two-phase horizontal screw centrifugal dehydrator available from Yonaite mechanical manufacturing Co., Suzhou under the model number LW 380. Wherein the content of the first and second substances,
the utility model provides an oily sludge pretreatment device 1 for get rid of water and oil among the oily sludge, as shown in fig. 2, be equipped with oily sludge import 16, add medicine mouth 22, dissolved air mouth of a river 21, first delivery port 20, first mud mouth 19 and first sump oil export 18. The oily sludge inlet 16 is used to introduce the oily sludge to be treated into the pretreatment system. The dosing port 22 is used for adding a demulsifier and a cleaning agent, wherein the demulsifier is selected from a block polyether demulsifier (the dosage is 200mg/L), and the cleaning agent is selected from a sulfonate surfactant (the dosage is 1000mg/L), and is connected with the dosing device 3. The dissolved gas water gap 21 is connected with a pressure dissolved gas water tank 2 to provide the dissolved gas mixed reflux water for the oily sludge pretreatment device 1. The first water outlet 20 is connected with the first sewage recovery tank 4, and the sewage which is treated by the oily sludge pretreatment device 1 and is removed of the dirty oil and the sludge is discharged through the first water outlet 20. The first sludge outlet 19 is connected with the sludge recovery tank 4, and the sludge which is treated by the oily sludge pretreatment device 1 and is removed with dirty oil and sewage is discharged to the sludge recovery tank 4 through the first sludge outlet 19. The first dirty oil outlet 18 is used for discharging dirty oil separated from the oily sludge.
The two-phase horizontal screw centrifugal separator 6 is used for further separating solid and liquid phases of the sludge treated by the oily sludge pretreatment device 1, and is provided with a sludge phase inlet, a second water outlet and a second sludge outlet. The mud phase inlet is connected with a mud outlet of a mud recovery tank 4 through a lift pump 5 and is used for guiding the mud obtained by the oily mud pretreatment device 1 into a two-phase horizontal screw centrifugal separator 6 for dehydration treatment. A second water outlet of the two-phase horizontal screw centrifugal separator 6 is used for discharging the separated sewage; and a second sludge outlet of the two-phase horizontal screw centrifugal separator 6 is used for discharging the dewatered sludge, the dewatered sludge meets the conditions that the water content is less than or equal to 60 percent and the oil content is less than or equal to 10 percent, and the sludge can be transported to a subsequent incineration treatment station for centralized sludge treatment to be incinerated and harmlessly treated.
The pretreatment method of the oily sludge pretreatment system for oily sludge specifically comprises the following steps:
(1) the oily sludge to be treated, the dissolved air water provided by the pressure dissolved air water tank 2, the demulsifier and the cleaning agent provided by the chemical adding device 3 are mixed at an oily sludge inlet and then enter the oily sludge pretreatment device 1, oil droplets in the oily sludge are combined with micro-bubbles in the dissolved air water, are attached to the micro-bubbles and float upwards to the upper half part of the tank body of the oily sludge pretreatment device 1 along with the micro-bubbles to form floating oil (oil phase) and are discharged from a first dirty oil outlet at the top, and dirty oil is separated; the mud phase is discharged from a first mud outlet at the bottom after being settled, and the mud is separated; the water phase is discharged from a first water outlet at the top; in order to accelerate the separation of oil, water and mud, a dissolved gas releaser is used to fully mix micro bubbles, a demulsifier and a cleaning agent in the dissolved gas water with the oily sludge.
(2) Discharging the sludge obtained in the step (1) into a sludge recovery tank 4, introducing the sludge into a two-phase horizontal screw centrifugal separator 6 through a lifting pump 5 for dehydration, conveying the dehydrated sludge to an incineration treatment station for subsequent centralized treatment through a second sludge outlet for incineration or pyrolysis treatment, wherein the water content of the dehydrated sludge is less than or equal to 60% and the oil content of the dehydrated sludge is less than or equal to 10%; the dehydrated sewage is discharged through a second water outlet and then is treated in a centralized way.
The working principle of the pretreatment system and the pretreatment method is as follows: firstly, carrying out fluidization, cleaning and sedimentation of oil, water and sludge three phases which mainly adopt 'air flotation oil removal and are assisted by cleaning and sedimentation' on oily sludge by using a pretreatment device, and removing a large amount of dirty oil in the oily sludge to obtain dirty oil, sewage and sludge; the sludge treated by the pretreatment device is further dewatered by a two-phase horizontal screw centrifugal dehydrator to obtain sewage and sludge, the treated sludge meets the conditions that the water content is less than or equal to 60 percent and the oil content is less than or equal to 10 percent, and the sludge can be directly transported out for incineration treatment; the sewage and the dirty oil treated by the pretreatment device are respectively and intensively treated.
After the oily sludge is treated by the oily sludge pretreatment system, the sludge can reach the index that the water content is less than or equal to 60 percent and the oil content is less than or equal to 10 percent, and then the oily sludge can reach the index that the oil content is less than or equal to 0.3 percent, which is required in DB 23/T1413-2010 of the oil field oily sludge comprehensive utilization pollution control Standard of Black Longjiang province, and then the oily sludge is treated as agricultural sludge.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should be regarded as the contents of the present invention.
Claims (10)
1. A pretreatment device (1) for oily sludge is characterized in that the pretreatment device is a hollow tank body (15), the middle part of the tank body is provided with an oily sludge inlet (16), a dissolved air water gap (21) and a medicine feeding port (22), and the middle part in the tank body is provided with a dissolved air releaser (23); the oily sludge inlet, the dissolved air water gap and the medicine feeding port are communicated with the tank body through a dissolved air releaser; the bottom of the tank body is provided with a first sludge outlet (19).
2. Pretreatment device according to claim 1, characterized in that the tank is provided with a stirrer (24) at its inner bottom.
3. The pretreatment apparatus according to claim 2, wherein the dissolved air releaser comprises a plurality of parallel circular tubes, holes are uniformly distributed on the circular tubes, one end of each circular tube is communicated with the oily sludge inlet, the dissolved air water gap and the chemical feeding port, and the other end of each circular tube is closed.
4. The pretreatment device according to claim 3, wherein the gas dissolving water gap and the dosing port are both arranged in the oil-containing sludge inlet.
5. The pretreatment apparatus according to claim 4, wherein the oily sludge inlet, the dissolved air water port and the dosing port are communicated with the tank body through a hole of the dissolved air releaser.
6. The pretreatment apparatus according to claim 5, wherein a baffle plate (25) vertically connected to the top of the tank and extending toward the bottom of the tank is provided in the other side of the tank, the baffle plate extending to a lower middle portion of the tank, and the first water outlet (20) is provided in an upper portion of a side wall of the tank near the baffle plate side.
7. The pretreatment device of claim 6, wherein the dosing port is connected to a dosing device (3) that provides a demulsifier and a cleaning agent to the pretreatment device.
8. The pretreatment device according to claim 7, wherein said dissolved gas water port is connected to a pressurized dissolved gas water tank (2) for supplying dissolved gas water to said pretreatment device.
9. The pretreatment device according to claim 8, wherein an oil receiving tank (17) is arranged at the upper part of one side of the tank body, an oil inlet of the oil receiving tank is positioned at the top in the tank body, and a first dirty oil outlet (18) is positioned at the lower part of the oil receiving tank.
10. A pretreatment system for oily sludge, characterized by comprising the pretreatment device (1) of any one of claims 1 to 9 and a two-phase horizontal screw centrifugal dehydrator (6), wherein the first sludge outlet is communicated with a sludge inlet of the two-phase horizontal screw centrifugal dehydrator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020409677.1U CN212293246U (en) | 2020-03-26 | 2020-03-26 | Pretreatment device and pretreatment system for oily sludge |
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| CN202020409677.1U CN212293246U (en) | 2020-03-26 | 2020-03-26 | Pretreatment device and pretreatment system for oily sludge |
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| CN212293246U true CN212293246U (en) | 2021-01-05 |
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Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District Central Plains Road No. 99 Patentee after: Daqing Oilfield Co.,Ltd. Patentee after: Daqing Oilfield Design Institute Co.,Ltd. Address before: 163453 Heilongjiang Province, Daqing City Ranghulu District Central Plains Road No. 99 Patentee before: Daqing Oilfield Co.,Ltd. Patentee before: DAQING OILFIELD ENGINEERING Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220209 Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District Central Plains Road No. 99 Patentee after: Daqing Oilfield Co.,Ltd. Patentee after: PETROCHINA Co.,Ltd. Patentee after: Daqing Oilfield Design Institute Co.,Ltd. Address before: 163453 Heilongjiang Province, Daqing City Ranghulu District Central Plains Road No. 99 Patentee before: Daqing Oilfield Co.,Ltd. Patentee before: Daqing Oilfield Design Institute Co.,Ltd. |