A kind of petroleum storage tank system
Technical field
This utility model relates to a kind of petroleum storage tank system, belongs to petroleum storage tank field.
Background technology
After oil tank uses a period of time, impurity in crude oil will be deposited on tank bottoms and tank skin, oil storage tank available capacity is made to reduce, affect the efficiency of oil storage tank, therefore petroleum storage tank needs periodically carry out maintenance and inspection and remove sludge in tank, current domestic traditional tank cleaning method mainly utilizes manually, and it is big that artificial clear tank also exists labor intensity, and long construction period, poor stability, crude oil recovery rate are low, pollute the problems such as environment.Along with a large amount of construction of Chinese large-sized petroleum storage tank and the pay attention to day by day to environmental protection problem, artificial clear tank has not met the objective requirement of environment and development, eliminates the certainty that artificial tank clearly is history.Use traditional artificial clear tank method, although operating expenses is low, but the tank bottoms sludge accounting for tank(storage)capacity 3%-4% is difficult to process, residual oil need to be pressed at a discount and sell.Although and COW process operating expenses is higher, but substantially all recovery can be divided by the oil in tank bottoms sludge, sell by normal oil price.As a example by 100,000 side's oil tanks: the crude oil that manual cleaning need to process at a discount about 1600 tons, the most per ton at a discount by 500 yuan of calculating, actual loss reaches 800,000 yuan, and as in the part plus reluctant greasy filth and waste, actual loss also to increase.Additionally COW process can reduce oil tank lay-off period, improves the utilization rate of oil tank, is conducive to increasing production and improying productivity.Lack the device of a kind of good oil sweep and relevant method currently on the market, it is impossible to realize the problem that petroleum storage tank bottom precipitation is not easily cleaned.
Utility model content
nullUtility model purpose of the present utility model is: for the problem of above-mentioned existence,A kind of petroleum storage tank system is provided,By impure for tank bottom more oil being carried out transfer precipitation,And get rid of the mode of the impurity of precipitation,Reduce sedimentary cleaning difficulty in oil tank body,Can start to carry out continuously the separation of impurity from adding oil,The cycle of its cleaning is long,Can have more preferable magazins' layout effect,Oil before needing only to the precipitation of tank bottom extracts,Can be realized as stone oil separating,During can effectively avoiding oil tank body life-time service,Contamination precipitation difficult treatment bottom it,Affect the problem that oil tank body itself uses,Reduce the cleaning cycle of oil tank body,By the way of transfer contamination precipitation,Effectively reduce the intractability of oil precipitation,Guarantee equipment uses difficulty,In addition,The existing oil tank installed can be applied to,That improves device easily promotes performance.This simple in construction, easy for installation, it is possible to effectively to realize the impurity of oil tank body bottom portion carries out extraction precipitation, prevent oil to be deposited to the problem that tank bottom is not easily cleaned, it is achieved the reduction of oil tank body cleaning difficulty.
The technical solution adopted in the utility model is as follows:
The utility model discloses a kind of petroleum storage tank system, including oil tank body, surge tank group, surge tank group includes the surge tank that more than two-stage is serially connected;The bottom of oil tank body is communicated to oil tank body upper part by surge tank group;It is in series with oil pump at the input port of surge tanks at different levels respectively, and the input port of surge tank is less than the delivery outlet of surge tank.
Owing to the body of present petroleum storage tank is bigger, it is big that it cleans difficulty, cleaning frequency is long, the input of manpower and materials is bigger, have a strong impact on the storage of oil, and the cleaning that this structure is to more than 5000 cubic metres oil pipes, will be by serious impact, due to said structure, in the storing process of oil, particularly in the storing process to the large-scale petroleum storing tank of more than 5000 cubic metres, the impurity of oil is at bottom precipitation, it is deposited in the impure higher oil of oil tank body bottom portion to be drawn in the first surge tank, precipitated and separated is carried out in the first surge tank, precipitated and separated rear impurity is got rid of through sewage draining exit, the less oil of impurity enters the second surge tank to carry out being layered for the second time, get rid of through sewage draining exit after contamination precipitation, the impure less oil being positioned at the second surge tank upper strata returns to the top of oil tank body.This simple in construction, easy for installation, it is possible to effectively to realize the impurity of oil tank body bottom portion carries out extraction precipitation, prevent oil to be deposited to the problem that tank bottom is not easily cleaned, it is achieved the reduction of oil tank body cleaning difficulty.
Further, being divided into settling zone, Disengagement zone and clean area from the bottom to top at surge tank, the input port of this surge tank is arranged on the tank skin of Disengagement zone, and the input port of this surge tank is positioned at Disengagement zone;The delivery outlet of this surge tank is positioned at clean area.This structure can three layers, it is possible to effectively realize the sharp separation oil of surge tank, it is ensured that upper strata impurity is less, thus the cleaning of the beneficially impurity of device, it is to avoid the difficulty of cleaning oil tank body.
Further, the aspect ratio of the settling zone of surge tank, Disengagement zone and clean area is 1.2:3.4:2.2.The ratio of this structure can be convenient to the separation of device, it is possible to realizes fast hierarchical, and raising is the separating rate of storage tank impurity, the cleanliness factor improving oil and the content of the impurity reducing clean area oil.
Further, surge tank group includes the first surge tank and the second surge tank, and the middle part of the first surge tank is communicated to oil tank body lower part by the first oil pump, and the second surge tank is communicated to the top of the first surge tank by the second oil pump;Pipeline communication is passed through to oil tank body upper part in second surge tank top.Being designed to of this two surge tanks accelerates separated from petroleum and circulation rate, it is possible to can strengthen equipment cleanliness efficiency, it is ensured that the convenience of the use of equipment, it is ensured that effective use of equipment simultaneously, it is achieved device is to the installation of existing storage tank and use.
Further, agitating device on first surge tank, agitating device includes stirring motor and tower-like agitator arm, agitator arm is coaxially connected with stirring motor, agitator arm includes shaft, stirring support and stirring vane, stirring vane is connected on shaft by stirring support, and stirring vane is obliquely installed and makes it produce the thrust of level, and this stirring support uses cylindrical steel bar;The first sewage draining exit it is provided with bottom the first surge tank;Stirring vane Multi-layers distributing, the stirring vane of adjacent layer mutually staggers, and the stirring stent length of adjacent layer is different, and its length ratio is for 1.3-1.6.The setting of this stirring structure, its agitating device realizes centrifugal in can helping the first surge tank, improve the speed of centrifugation, the less oil of separated from petroleum rear impurity concentrates on the middle part of the first surge tank, the centrifugal force provided due to stirring support is less, and the less oil of impurity can rise along shaft, is then passed through pipeline and enters in the second surge tank, then it is deposited in settling zone additionally, impurity is centrifuged at the tank skin of the first storage tank.
Further, the middle part in the second surge tank is provided with the separate cavities of upper opening, and the delivery outlet of the second surge tank is extend in separate cavities by pipeline;The bottom of this second surge tank arranges the second sewage draining exit.In this second surge tank, the setting of separate cavities can increase the scope of clean area, in addition the middle part of surge tank is isolated, impurity can be enable preferably to be centrifuged, improve the centrifugal efficiency of device, in addition, prevent in the middle part of the second surge tank centrifugal incomplete impurity to re-enter in oil tank body, reduce the probability returned in oil tank body of impurity, time impurity reenter the probability in oil tank body and reduce 30-50%.
Further, first sewage draining exit is by pipeline communication to pollution discharge pond, pollution discharge pond oral area is provided with titration appratus, this titration appratus is made up of 5 parts of micrococcus luteus, 7 parts of Arthrobacter globiformis, 4 parts of Rhodococcus fascians, 8 parts of salt bacillus, 12 parts of desulfovibrios, 10 parts of micrococcal nucleases, 16 parts of Arthrobacter globiformis uricases, 20 parts of dehydrogenases, 6900 parts of water for filling precipitation decomposed solution in pollution discharge pond, precipitation decomposed solution.The decomposed solution of this composition can quickly realize the decomposition of stone well cuts and the classification of oil, effectively avoids oil disorderly discharge to realize the pollution caused, it is possible to decompose fast and effectively, it is achieved environmental protection.
Further, its cleaning method is:
Step 1: the first oil pump extracts the oil of oil tank body bottom portion with the speed of 1.5-2.2L/s, and oil is injected in the first surge tank along the medial wall level that the first surge tank is circular with the speed of 2-3m/s, meanwhile, control stirring motor rotates along the direction that sprays into of oil with the speed of 50-70r/min;
Step 2: the oil in the first surge tank, under centrifugal action, makes the impurity in oil be pooled to the outside of the first surge tank, is from top to bottom divided into settling zone, Disengagement zone and clean area simultaneously;The aspect ratio of settling zone, Disengagement zone and clean area is 2:3:3;
Step 3: the oil in the second oil pump extraction clean area, and enter the second surge tank with the speed of 1.5-2m/s, oil rotates along the annular space between the second surge tank and separate cavities, and in rotary course, realize centrifugation, contamination precipitation in oil is to the bottom of the second surge tank, and oil enters into the clean area of the second surge tank, and in clean area is flowed into separate cavities, along with the pressure in separate cavities increases, oil enters into the top of oil tank body from the pipeline extending into separate cavities;
Step 4: the impurity in the first surge tank and the second surge tank is discharged in pollution discharge pond by the first sewage draining exit and the second sewage draining exit respectively, is provided with titration appratus in the porch of pollution discharge pond, the infusion volume of titration appratus is 20:1 with the impurity injection rate of pollution discharge pond;This titration appratus instills precipitation decomposed solution to pollution discharge pond, and precipitation decomposed solution is made up of 5-6 part micrococcus luteus, 7-9 part Arthrobacter globiformis, 3-4 part Rhodococcus fascians, 2-8 part salt bacillus, 5-12 part desulfovibrio, 8-10 part micrococcal nuclease, 8-16 part Arthrobacter globiformis uricase, 17-20 part dehydrogenase, 6900-7800 part water.,
nullThe method by carrying out transfer precipitation by impure for tank bottom more oil,And get rid of the mode of the impurity of precipitation,Reduce sedimentary cleaning difficulty in oil tank body,In addition,The method can start to carry out continuously the separation of impurity from adding oil,The cycle of its cleaning is long,Can have more preferable magazins' layout effect,Oil before needing only to the precipitation of tank bottom extracts,Can be realized as stone oil separating,During can effectively avoiding oil tank body life-time service,Contamination precipitation difficult treatment bottom it,Affect the problem that oil tank body itself uses,Reduce the cleaning cycle of oil tank body,By the way of transfer contamination precipitation,Effectively reduce the intractability of oil precipitation,Guarantee equipment uses difficulty,In addition,The method can be applied to the existing oil tank installed,That improves device easily promotes performance.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1, by impure for tank bottom more oil being carried out transfer precipitation, and get rid of the mode of the impurity of precipitation, reduce sedimentary cleaning difficulty in oil tank body, can start to carry out continuously the separation of impurity from adding oil, the cycle of its cleaning is long, it is possible to have more preferable magazins' layout effect.
2, the oil before needing only to the precipitation of tank bottom extracts, can be realized as stone oil separating, during can effectively avoiding oil tank body life-time service, contamination precipitation difficult treatment bottom it, affect the problem that oil tank body itself uses, reduce the cleaning cycle of oil tank body.
3, by the way of transfer contamination precipitation, effectively reducing the intractability of oil precipitation, it is ensured that equipment uses difficulty, it is possible to be applied to the existing oil tank installed, that improves device easily promotes performance.This simple in construction, easy for installation, it is possible to effectively to realize the impurity of oil tank body bottom portion carries out extraction precipitation, prevent oil to be deposited to the problem that tank bottom is not easily cleaned, it is achieved the reduction of oil tank body cleaning difficulty.
Accompanying drawing explanation
Fig. 1 is petroleum storage tank system front view in this utility model;
Labelling in figure: 1-oil tank body, 2-the second surge tank, 3-the second oil pump, 4-the first surge tank, 5-the first oil pump.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
Embodiment 1
The utility model discloses a kind of petroleum storage tank system as it is shown in figure 1, of the present utility model, including oil tank body 1, surge tank group, surge tank group includes the surge tank that more than two-stage is serially connected;The bottom of oil tank body 1 is communicated to oil tank body 1 top by surge tank group;It is in series with oil pump at the input port of surge tanks at different levels respectively, and the input port of surge tank is less than the delivery outlet of surge tank.
Being divided into settling zone, Disengagement zone and clean area from the bottom to top at surge tank, the input port of this surge tank is arranged on the tank skin of Disengagement zone, and the input port of this surge tank is positioned at Disengagement zone;The delivery outlet of this surge tank is positioned at clean area.This structure can three layers, it is possible to effectively realize the sharp separation oil of surge tank, it is ensured that upper strata impurity is less, thus the cleaning of the beneficially impurity of device, it is to avoid the difficulty of cleaning oil tank body 1.
The aspect ratio of the settling zone of surge tank, Disengagement zone and clean area is 1.2:3.4:2.2.This ratio is convenient to the separation of device, it is possible to realize fast hierarchical, and raising is the separating rate of storage tank impurity, the cleanliness factor improving oil and the content of the impurity reducing clean area oil.
Surge tank group includes the first surge tank 4 and the second surge tank 2, and the middle part of the first surge tank 4 is communicated to oil tank body 1 bottom by the first oil pump 5, and the second surge tank 2 is communicated to the top of the first surge tank 4 by the second oil pump 3;Pipeline communication is passed through to oil tank body 1 top in second surge tank 2 top.Being designed to of this two surge tanks accelerates separated from petroleum and circulation rate, it is possible to can strengthen equipment cleanliness efficiency, it is ensured that the convenience of the use of equipment, it is ensured that effective use of equipment simultaneously, it is achieved device is to the installation of existing storage tank and use.
Agitating device on first surge tank 4, agitating device includes stirring motor and tower-like agitator arm, agitator arm is coaxially connected with stirring motor, agitator arm includes shaft, stirring support and stirring vane, stirring vane is connected on shaft by stirring support, stirring vane is obliquely installed and makes it produce the thrust of level, and this stirring support uses cylindrical steel bar;It is provided with the first sewage draining exit bottom the first surge tank 4;Stirring vane Multi-layers distributing, the stirring vane of adjacent layer mutually staggers, and the stirring stent length of adjacent layer is different, and its length ratio is for 1.3-1.6.The setting of this stirring structure, its agitating device realizes centrifugal in can helping the first surge tank 4, improve the speed of centrifugation, the less oil of separated from petroleum rear impurity concentrates on the middle part of the first surge tank 4, the centrifugal force provided due to stirring support is less, and the less oil of impurity can rise along shaft, is then passed through pipeline and enters in the second surge tank 2, then it is deposited in settling zone additionally, impurity is centrifuged at the tank skin of the first storage tank.
Middle part in second surge tank 2 is provided with the separate cavities of upper opening, and the delivery outlet of the second surge tank 2 is extend in separate cavities by pipeline;The bottom of this second surge tank 2 arranges the second sewage draining exit.In this second surge tank 2, the setting of separate cavities can increase the scope of clean area, in addition the middle part of surge tank is isolated, impurity can be enable preferably to be centrifuged, improve the centrifugal efficiency of device, in addition, prevent in the middle part of the second surge tank 2 centrifugal incomplete impurity to re-enter in oil tank body 1, reduce the probability returned in oil tank body 1 of impurity, time impurity reenter the probability in oil tank body 1 and reduce 30-50%.
First sewage draining exit is by pipeline communication to pollution discharge pond, pollution discharge pond oral area is provided with titration appratus, this titration appratus is made up of 5 parts of micrococcus luteus, 7 parts of Arthrobacter globiformis, 4 parts of Rhodococcus fascians, 8 parts of salt bacillus, 12 parts of desulfovibrios, 10 parts of micrococcal nucleases, 16 parts of Arthrobacter globiformis uricases, 20 parts of dehydrogenases, 6900 parts of water for filling precipitation decomposed solution in pollution discharge pond, precipitation decomposed solution.The decomposed solution of this composition can quickly realize the decomposition of stone well cuts and the classification of oil, effectively avoids oil disorderly discharge to realize the pollution caused, it is possible to decompose fast and effectively, it is achieved environmental protection.
Due to said structure, in the storing process of oil, the impurity of oil sends precipitation in bottom, it is deposited in during bottom oil tank body 1, impure higher oil is drawn into the first surge tank 4, carrying out precipitated and separated in the first surge tank 4, precipitated and separated rear impurity is got rid of through sewage draining exit, and the less oil of impurity enters the second surge tank 2 to carry out being layered for the second time, getting rid of through sewage draining exit after contamination precipitation, the impure less oil being positioned at the second surge tank 2 upper strata returns to the top of oil tank body 1.This simple in construction, easy for installation, it is possible to effectively to realize the impurity bottom oil tank body 1 carries out extraction precipitation, prevent oil to be deposited to the problem that tank bottom is not easily cleaned, it is achieved oil tank body 1 clears up the reduction of difficulty.
Embodiment 2
The cleaning method of petroleum storage tank system based on embodiment 1 is:
Step 1: the first oil pump 5 extracts the oil bottom oil tank body 1 with the speed of 1.5-2.2L/s, and oil is injected in the first surge tank 4 along the medial wall level of the first surge tank 4 circle with the speed of 2-3m/s, meanwhile, control stirring motor rotates along the direction that sprays into of oil with the speed of 50-70r/min;
Step 2: the oil in the first surge tank 4, under centrifugal action, makes the impurity in oil be pooled to the outside of the first surge tank 4, is from top to bottom divided into settling zone, Disengagement zone and clean area simultaneously;The aspect ratio of settling zone, Disengagement zone and clean area is 2:3:3;
Step 3: the second oil pump 3 extracts the oil in clean area, and enter the second surge tank 2 with the speed of 1.5-2m/s, oil rotates along the annular space between the second surge tank 2 and separate cavities, and in rotary course, realize centrifugation, contamination precipitation in oil is to the bottom of the second surge tank 2, oil enters into the clean area of the second surge tank 2, and in clean area is flowed into separate cavities, along with the pressure in separate cavities increases, oil enters into the top of oil tank body 1 from the pipeline extending into separate cavities;
Step 4: the impurity in the first surge tank 4 and the second surge tank 2 is discharged in pollution discharge pond by the first sewage draining exit and the second sewage draining exit respectively, is provided with titration appratus in the porch of pollution discharge pond, the infusion volume of titration appratus is 20:1 with the impurity injection rate of pollution discharge pond;This titration appratus instills precipitation decomposed solution to pollution discharge pond, and precipitation decomposed solution is made up of 5-6 part micrococcus luteus, 7-9 part Arthrobacter globiformis, 3-4 part Rhodococcus fascians, 2-8 part salt bacillus, 5-12 part desulfovibrio, 8-10 part micrococcal nuclease, 8-16 part Arthrobacter globiformis uricase, 17-20 part dehydrogenase, 6900-7800 part water.,
nullThe method by carrying out transfer precipitation by impure for tank bottom more oil,And get rid of the mode of the impurity of precipitation,Reduce sedimentary cleaning difficulty in oil tank body 1,In addition,The method can start to carry out continuously the separation of impurity from adding oil,The cycle of its cleaning is long,Can have more preferable magazins' layout effect,Oil before needing only to the precipitation of tank bottom extracts,Can be realized as stone oil separating,During can effectively avoiding oil tank body 1 life-time service,Contamination precipitation difficult treatment bottom it,Affect the problem that oil tank body 1 uses itself,Reduce the cleaning cycle of oil tank body 1,By the way of transfer contamination precipitation,Effectively reduce the intractability of oil precipitation,Guarantee equipment uses difficulty,In addition,The method can be applied to the existing oil tank installed,That improves device easily promotes performance.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.