CN104019366A - Pulp conveying pipeline system with pipeline protection function and pulp conveying method - Google Patents
Pulp conveying pipeline system with pipeline protection function and pulp conveying method Download PDFInfo
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- CN104019366A CN104019366A CN201410259667.3A CN201410259667A CN104019366A CN 104019366 A CN104019366 A CN 104019366A CN 201410259667 A CN201410259667 A CN 201410259667A CN 104019366 A CN104019366 A CN 104019366A
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Abstract
The invention provides a pulp conveying pipeline system with a pipeline protection function and a pulp conveying method. The pipeline system comprises a concentration basin, an underflow pump, an ore pulp storage tank, a feeding pump and a lime milk adding unit, wherein the lime milk adding unit comprises a lime milk stirring tank, a lime milk metering pump, a first branch pipeline and a second branch pipeline, the lime milk stirring tank is connected to the lime milk metering pump through a pipeline, an outlet of the lime milk metering pump is connected with the first branch pipeline and the second branch pipeline, an outlet of the first branch pipeline is connected to a connecting pipeline of the underflow pump, and an outlet of the second branch pipeline is connected to a connecting pipeline of the feeding pump. The two branch pipelines are switched in an alternating mode so that lime milk can be added to a pulp conveying main pipeline, a thick scaling layer accumulated on the inner wall of the pipeline is avoided, lime milk adding amount is guaranteed, continuous production is achieved, and production efficiency is improved.
Description
Technical field
The present invention relates to pipe transportation technology field, relate to more specifically a kind of slurry transportation pipeline system and slurry delivery method with pipe protection function.
Background technique
Pipe transportation technology is a kind of novel means of transportation, be different from the Traditional Transportation modes such as highway, railway, water transport, aviation, pipeline transport not only have transport volume large, continuously, rapidly, economic, safety, reliable, steadily and little investment, occupation of land less, the distinct advantages such as expense is low, and can realize automatic control.Nowadays the pipeline transport in the whole world is being born the energy Material Transportation of significant proportion, comprises crude oil, product oil, rock gas, associated gas, coal slurry, concentrate etc., and it plays a very important role in national economy and social development.But normally by low carbon steel, made for delivery of the slurry transportation pipeline of ore pulp, by corroding and the pipe interior metal loss causing that weares and teares occupies main status in circuit design, and the internal corrosion loss of slurry pipeline is obviously different from the pipeline of simple conveying fluid, because the existence meeting accelerated corrosion rate of solid particle in slurry, the tube wall that simultaneously also can wear and tear, all will consider the corrosion allowance of the length of service while therefore selecting pipe wall.Generally select iron ore concentrate pulp PH value that factory produces in below 7, be acid, for reducing the rate of corrosion of slurry pipeline, the ore pulp that requires pipeline to carry is alkalescence, conventionally be all by add lime milk in pipeline, to improve the pH value of transfer ore pulp, pH value is brought up to 10.5 and can effectively reduce corrosion rate, but can form layer of scale (calcium carbonate) at inner-walls of duct when adding lime milk in slurry transportation pipeline, in long using process, the thickness of this layer of scale can be more long-pending thicker, finally cause effective internal diameter of slurry transportation pipeline to diminish, the serious conveying production capacity of pipeline to slurry that affect, especially in the thinner slurry body feeding unit of pipeline, in prior art, conventional way is regularly the pipeline in slurry feeding unit to be disassembled to the cleaning of carrying out layer of scale, this manner of cleaning up is complex process not only, and the layer of scale that sometimes disassembles rear discovery inner-walls of duct does not reach the thickness that affects production capacity, make the pipeline dismounting manner of cleaning up of this blindness understand the serious manufacturing efficiency that affects.
Summary of the invention
The present invention is based on above-mentioned prior art problem; a kind of slurry transportation pipeline system and slurry delivery method with pipe protection function proposed; the lime milk add-on system that comprises two pipeline branch roads by innovative design; intersecting to switch carries main pipeline to add lime milk to slurry; avoided inner-walls of duct accumulation to form thicker layer of scale; when guaranteeing lime milk adding quantity, realized continuous production, improved manufacturing efficiency.
It is as follows that the present invention solves the problems of the technologies described above taked technological scheme:
a kind of slurry transportation pipeline system with pipe protection function, comprise deckered stock chest 1, underflow pump 2, ore pulp holding tank 3, feeding pump 4 and lime milk adding device, the bottom outlet of described deckered stock chest 1 is connected in the pumping entrance of described underflow pump 2 by pipeline, the pumping outlet of described underflow pump 2 is connected in the entrance of described ore pulp holding tank 3 by pipeline, the outlet of described ore pulp holding tank 3 is connected in the pumping entrance of described feeding pump 4 by pipeline, described lime milk adding device comprises lime milk stirring chest 5, lime milk metering pump 6, the first pipeline branch road and second pipe branch road, the outlet of described lime milk stirring chest 5 is connected in the pumping entrance of lime milk metering pump 6 by pipeline, the pumping outlet of described lime milk metering pump 6 is connected in described the first pipeline branch road and second pipe branch road simultaneously, the outlet of described the first pipeline branch road is connected on the connecting tube of described underflow pump 2, the outlet of described second pipe branch road is connected on the connecting tube of described feeding pump 4.
Further, according to slurry transportation pipeline system of the present invention, on wherein said the first pipeline branch road and second pipe branch road, be provided with valve 7,8,9,10 and safety check 11,12.
Further, according to slurry transportation pipeline system of the present invention, the outlet of wherein said the first pipeline branch road is connected on the pumping inlet pipe of described underflow pump 2, and the outlet of described second pipe branch road is connected on the pumping inlet pipe of described feeding pump 4.
Further according to slurry transportation pipeline system of the present invention, wherein also include main pump 13 and slurry and carry main pipeline 14, the pumping outlet of described feeding pump 4 is connected in the pumping entrance of described main pump 13 by pipeline, the pumping outlet of described main pump 13 is connected in described slurry by pipeline and carries main pipeline 14.
Further according to slurry transportation pipeline system of the present invention, wherein by described valve, control described the first pipeline branch road and second pipe branch road in connected state alternately.
Further according to slurry transportation pipeline system of the present invention, the weight concentration of the lime milk that wherein said lime milk stirring chest 5 provides is in 15-20%, the interpolation volume ratio that described lime milk metering pump 6 is controlled described lime milk is between 1/1000-10/1000, and entering slurry, to carry the slurry pH value of main pipeline 14 be more than 10.
The slurry delivery method carrying out based on slurry transportation pipeline system of the present invention, comprises the following steps:
1), start underflow pump 2, the thick fluid pump in deckered stock chest 1 is delivered to ore pulp holding tank 3, start feeding pump 4, the slurry pumping output by ore pulp holding tank 3 starts lime milk metering pump 6 simultaneously, by the lime milk pumping output in lime milk stirring chest 5;
2), open the valve 7,9 on the first pipeline branch road, close the valve 8 on second pipe branch road simultaneously, utilize the first pipeline branch road that the lime milk in lime milk stirring chest 5 is added in the pipeline that underflow pump 2 connects by predetermined ratio, and mix with slurry wherein;
3), whether the lime milk fouling that detects 2 connecting tube inwalls of described underflow pump exceed preset thickness, continue if not to detect, if perform step 4;
4), close the valve 7 on the first pipeline branch road, open the valve 8,10 on second pipe branch road simultaneously, utilize second pipe branch road that the lime milk in lime milk stirring chest 5 is added in the pipeline that feeding pump 4 connects by predetermined ratio, and mix with slurry wherein;
5), whether the lime milk fouling that detects 4 connecting tube inwalls of described feeding pump exceed preset thickness, continue if not to detect, if repeated execution of steps 2.
Further according to slurry delivery method of the present invention, wherein said step 3) specifically detects the lime milk fouled condition of the pumping entrance inner-walls of duct of described underflow pump 2, and described step 5) specifically detects the lime milk fouled condition of the pumping entrance inner-walls of duct of described feeding pump 4.
Further according to slurry delivery method of the present invention, wherein said step 2) in also comprise the lime milk fouling in second pipe branch road cleared up; In described step 4), also comprise the lime milk fouling in the first pipeline branch road is cleared up.
Further according to slurry delivery method of the present invention, the weight concentration of the lime milk that wherein said lime milk stirring chest 5 provides is in 15-20%, and the volume flowrate ratio between the described lime milk metering pump 6 described lime milk of control and slurry is between 1/1000-10/1000.
By technological scheme of the present invention, at least can reach following technique effect:
1), described slurry transportation pipeline system possesses lime milk adding device, realized alkaline slurry and carried, and by the corrosion control of inner-walls of duct within scope of design, improved pipeline working life.
2) mode that, described lime milk add-on system switches mutually based on two pipeline branch roads is added lime milk to slurry transportation pipeline system, by the mode of mutually switching to underflow pump pipeline and feeding pump pipeline, add lime milk, avoided inner-walls of duct accumulation formation in adding lime milk process compared with thick layer of scale, to affect pipeline conveying production capacity, improved pipeline transport efficiency and reduced the blocked risk of pipeline.
3), described Slurry Pipeline Transportation method is utilized the mobility Automatic clearance lime milk layer of scale of slurry; avoided the problem that in conventional method, must clean every half a year to pipeline; effectively protected pipeline; and greatly reduce pipeline cleaning cost; guarantee the continuous operation of Slurry Pipeline Transportation system, improved manufacturing efficiency.
Accompanying drawing explanation
Accompanying drawing 1 is the overall structure schematic diagram of slurry transportation pipeline system of the present invention.
In figure, the implication of each reference character is as follows:
1-deckered stock chest, 2-underflow pump, 3-ore pulp holding tank, 4-feeding pump, 5-lime milk stirring chest, 6-lime milk metering pump, 7-valve, 8-valve, 9-valve, 10-valve, 11-safety check, 12-safety check, 13-main pump, 14-slurry is carried main pipeline.
Embodiment
Below in conjunction with accompanying drawing, technological scheme of the present invention is described in detail, so that those skilled in the art can more clearly understand the solution of the present invention, but does not therefore limit the scope of the invention.
a kind of slurry transportation pipeline system with pipe protection function, as shown in Figure 1, comprise deckered stock chest 1, underflow pump 2, ore pulp holding tank 3, feeding pump 4, lime milk stirring chest 5, lime milk metering pump 6, valve 7-10, safety check 11-12, main pump and slurry are carried main pipeline 14, wherein said deckered stock chest 1 is for concentrated ore pulp slurry, bottom outlet at deckered stock chest 1 is connected in underflow pump 2 by pipeline, the pumping outlet of described underflow pump 2 is connected in ore pulp holding tank 3 by pipeline, by described underflow pump 2, ore pulp thick fluid pump concentrated in deckered stock chest 1 is delivered in ore pulp holding tank 3, the outlet of described ore pulp holding tank 3 is connected in feeding pump 4 by pipeline, the pumping outlet of described feeding pump 4 is connected in main pump 13 by pipeline, the pumping outlet of described main pump 13 is connected in slurry and carries main pipeline 14, by described feeding pump 4, the ore pulp thick fluid pump in ore pulp holding tank 3 is delivered to main pump 13, in slurry being supplied to by described main pump 13 to slurry conveying main pipeline 14, the long distance of carrying main pipeline 14 to realize ore pulp slurry by slurry is carried.
Because slurry transportation pipeline is made by low carbon steel, for alleviating corrosion and the wearing and tearing that in slurry course of conveying, inner-walls of duct caused, the pH value of slurry body in pipeline need to be arranged on to 10.5 to reduce corrosion rate, by add lime milk in pipeline, realize the adjustment of slurry pH value, meet pipeline and carry that to require ore pulp be alkaline condition, but can form layer of scale (calcium carbonate also comprises Fe(OH for iron ore concentrate slurry conveyance conduit) at inner-walls of duct when adding lime milk in slurry transportation pipeline
2or Fe(OH)
3), in long using process, the thickness of this layer of scale can be more long-pending thicker, finally cause effective internal diameter of slurry transportation pipeline to diminish, the serious conveying production capacity of pipeline to slurry that affect, especially in the feeding unit of slurry body, cause pipeline wherein is far narrower than slurry and carries main pipeline, therefore in the process of adding lime milk, must at inner-walls of duct, form thicker layer of scale by prevention lime milk, the proposition of the application innovation the lime milk adding device in Slurry Pipeline Transportation system, considered this scale effect simultaneously, as shown in Figure 1, described lime milk adding device specifically comprises lime milk stirring chest 5, lime milk metering pump 6, valve 7-10, safety check 11-12 and connecting tube, described lime milk stirring chest 5 is for stirring the lime milk that generates predetermined concentration, the weight concentration of preferred described lime milk is 16.24%, the volume concentration of solid particle is 5.55%, according to the ore pulp slurry volume flowrate 184.21m of design
3/ h(Cw is 70%), the corresponding lime milk flow adding is 0.87m
3/ h, the outlet of described lime milk stirring chest 5 is connected in lime milk metering pump 6 by pipeline, by lime milk metering pump 6, control mixed proportion between lime milk and ore pulp slurry (by flowmeter: 2-8:1000), the outlet conduit of described lime milk metering pump 6 is connected in two pipeline branch roads, wherein pipeline branch road is connected on the inlet pipe of underflow pump 2 (connecting tubes that deckered stock chest 1 bottom outlet and underflow pump are 2), and be provided with valve 7 on this pipeline branch road, valve 9 and safety check 11, preferably on this pipeline branch road, can further be provided with pH detector, wherein another pipeline branch road is connected on the inlet pipe of feeding pump 4 (connecting tubes that ore pulp holding tank 3 bottom outlets and feeding pump are 4), and be provided with valve 8 on this pipeline branch road, valve 10 and safety check 12, preferably on this pipeline branch road, can further be provided with pH detector, article two, the pipeline branch road work that interval replaces mutually to schedule, when selecting article one pipeline branch road to add lime milk, start lime milk metering pump 6, open valve 7 and 9, while throttle down 8, the lime milk of lime milk stirring chest 5 interior predetermined concentrations is pumped to the pumping pipe entrance of underflow pump 2 through article one pipeline branch road by lime milk metering pump 6, after evenly mixing with the ore pulp slurry in deckered stock chest 1, by underflow pump 2, be pumped to ore pulp holding tank 3, realizing lime milk adds in ore pulp slurry by predetermined ratio, detect in this case the fouling situation of 2 connecting tube inwalls of underflow pump simultaneously, if the fouling of inner-walls of duct many (exceeding predetermined detection standard), switch while adopting second pipeline branch road to add lime milk, concrete throttle down 7, open valve 8 and 10, the lime milk of lime milk stirring chest 5 interior predetermined concentrations is pumped to the pumping pipe entrance of feeding pump 4 through second pipeline branch road by lime milk metering pump 6, ore pulp slurry with 3 outputs of ore pulp holding tank is evenly exported by feeding pump 4 pumpings after mixing, ore pulp slurry from deckered stock chest 1 is being pumped in the process of ore pulp holding tank 3 through underflow pump 2 simultaneously, the layer of scale that 2 connecting tube inwalls of underflow pump can be produced carries out attrition, to avoid underflow pump institute connecting tube inwall to form the layer of scale of long-term accumulated, by second pipeline branch road, adding in the process of lime milk simultaneously, detect the fouling situation of 4 connecting tube inwalls of feeding pump simultaneously, if the fouling of inner-walls of duct many (exceeding predetermined detection standard), in like manner again be switched to article one pipeline branch road and add lime milk, the layer of scale that 4 connecting tube inwalls of feeding pump have produced can not added lime milk ore pulp slurry attrition in ore pulp holding tank 3, the interpolation lime milk that switches of so intersecting can effectively be protected in slurry feeding unit can not form the layer of scale of accumulation on feeding pump 4 and 2 connecting tubes of underflow pump, avoided lime milk layer of scale more long-pending thicker phenomenon on inner-walls of duct completely, guaranteed slurry supply, removed the regular chemical cleaning link to pipeline from simultaneously, simultaneously during described article one pipeline branch road and second pipeline branch road switch operating, can to another pipeline branch road inwall, clear up simultaneously, as when article one pipeline branch road is worked, second pipe branch road is cleared up, when second pipeline branch road is worked, the first pipeline branch road is cleared up.Preferred described article one pipeline branch road and second pipe branch road carry out work according to the mode that switch once every half a year, this is claimant through practice summary over a long time out, general according to the conventional proportioning flow 2-8:1000 of lime milk and ore pulp slurry, generally about half a year, lime milk can form at inner-walls of duct the layer of scale of cumulative thickness just now.The detection of the detection of 2 connecting tube encrustation situations of above-mentioned underflow pump and 4 connecting tube encrustation situations of feeding pump can be by carrying out in pipeline opening, such as the detection of 2 connecting tube inwalls of underflow pump can be undertaken by the inner-walls of duct in underflow pump pumping ingress, the inner-walls of duct of this ingress of one easily detects, the fouling of lime milk in pumping ingress is the most serious in addition, while not forming thicker layer of scale on the inner-walls of duct of pumping ingress, also can the not exert an influence thicker thickness of production and transport of other positions of pipeline.When closing underflow pump and feeding pump, stop slurry for seasonable, close lime milk metering pump simultaneously.
Below be only that the preferred embodiment of the present invention is described; technological scheme of the present invention is not limited to this; the any known distortion that those skilled in the art do on the basis of major technique of the present invention design all belongs to the claimed technology category of the present invention, and the concrete protection domain of the present invention is as the criterion with the record of claims.
Claims (10)
1. a slurry transportation pipeline system with pipe protection function, it is characterized in that, comprise deckered stock chest (1), underflow pump (2), ore pulp holding tank (3), feeding pump (4) and lime milk adding device, the bottom outlet of described deckered stock chest (1) is connected in the pumping entrance of described underflow pump (2) by pipeline, the pumping outlet of described underflow pump (2) is connected in the entrance of described ore pulp holding tank (3) by pipeline, the outlet of described ore pulp holding tank (3) is connected in the pumping entrance of described feeding pump (4) by pipeline, described lime milk adding device comprises lime milk stirring chest (5), lime milk metering pump (6), the first pipeline branch road and second pipe branch road, the outlet of described lime milk stirring chest (5) is connected in the pumping entrance of lime milk metering pump (6) by pipeline, the pumping outlet of described lime milk metering pump (6) is connected in described the first pipeline branch road and second pipe branch road simultaneously, the outlet of described the first pipeline branch road is connected on the connecting tube of described underflow pump (2), the outlet of described second pipe branch road is connected on the connecting tube of described feeding pump (4).
2. slurry transportation pipeline system according to claim 1, is characterized in that, is provided with valve (7,8,9,10) and safety check (11,12) on described the first pipeline branch road and second pipe branch road.
3. slurry transportation pipeline system according to claim 2, it is characterized in that, the outlet of described the first pipeline branch road is connected on the pumping inlet pipe of described underflow pump (2), and the outlet of described second pipe branch road is connected on the pumping inlet pipe of described feeding pump (4).
4. according to the slurry transportation pipeline system described in claim 1-3 any one, it is characterized in that, also include main pump (13) and slurry and carry main pipeline (14), the pumping outlet of described feeding pump (4) is connected in the pumping entrance of described main pump (13) by pipeline, the pumping outlet of described main pump (13) is connected in described slurry by pipeline and carries main pipeline (14).
5. according to the slurry transportation pipeline system described in claim 2 or 3, it is characterized in that, by described valve, control described the first pipeline branch road and second pipe branch road in connected state alternately.
6. according to the slurry transportation pipeline system described in claim 1-5 any one, it is characterized in that, the weight concentration of the lime milk that described lime milk stirring chest (5) provides is in 15-20%, and described lime milk metering pump (6) is controlled the interpolation volume ratio of lime milk between 1/1000-10/1000.
7. the slurry delivery method carrying out based on slurry transportation pipeline system described in claim 1-6 any one, is characterized in that, comprises the following steps:
(1), start underflow pump (2), thick fluid pump in deckered stock chest (1) is delivered to ore pulp holding tank (3), start feeding pump (4), by the slurry pumping output in ore pulp holding tank (3), start lime milk metering pump (6), by the lime milk pumping output in lime milk stirring chest (5) simultaneously;
(2), open the valve (7,9) on the first pipeline branch road, close the valve (8) on second pipe branch road simultaneously, utilize the first pipeline branch road that the lime milk in lime milk stirring chest (5) is added in the pipeline that underflow pump (2) connects by predetermined ratio, and mix with slurry wherein;
(3), whether the lime milk fouling that detects described underflow pump (2) institute connecting tube inwall exceed preset thickness, continue if not to detect, if execution step (4);
(4), close the valve (7) on the first pipeline branch road, open the valve (8,10) on second pipe branch road simultaneously, utilize second pipe branch road that the lime milk in lime milk stirring chest (5) is added in the pipeline that feeding pump (4) connects by predetermined ratio, and mix with slurry wherein;
(5), whether the lime milk fouling that detects described feeding pump (4) institute connecting tube inwall exceed preset thickness, continue if not to detect, if repeated execution of steps (2).
8. slurry delivery method according to claim 7, it is characterized in that, described step (3) specifically detects the lime milk fouled condition of the pumping entrance inner-walls of duct of described underflow pump (2), and described step (5) specifically detects the lime milk fouled condition of the pumping entrance inner-walls of duct of described feeding pump (4).
9. slurry delivery method according to claim 7, is characterized in that, in described step (2), also comprises the lime milk fouling in second pipe branch road is cleared up; In described step (4), also comprise the lime milk fouling in the first pipeline branch road is cleared up.
10. according to the slurry delivery method described in claim 7-9 any one, it is characterized in that, the weight concentration of the lime milk that described lime milk stirring chest (5) provides is in 15-20%, described lime milk metering pump (6) is controlled volume flowrate ratio between described lime milk and slurry between 1/1000-10/1000, and entering slurry, to carry the slurry pH value of main pipeline (14) be more than 10.
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| CN201410259667.3A CN104019366B (en) | 2014-06-12 | 2014-06-12 | There is slurry transportation pipeline system and the slurry carrying method of pipe protection function |
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| CN201410259667.3A CN104019366B (en) | 2014-06-12 | 2014-06-12 | There is slurry transportation pipeline system and the slurry carrying method of pipe protection function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104295906A (en) * | 2014-10-13 | 2015-01-21 | 云南大红山管道有限公司 | Multi-pipeline and multi-station pulp pipe conveying system and pulp conveying control method |
| CN106929668A (en) * | 2017-03-29 | 2017-07-07 | 中国恩菲工程技术有限公司 | It is a kind of to improve the method that lateritic nickel ore high pressure leaches the mesohigh kettle feed pump check valve life-span |
| CN109556669A (en) * | 2017-09-26 | 2019-04-02 | 西安国仪测控设备有限公司 | Hyperfrequency mass flowmenter and method |
| CN110657350A (en) * | 2019-08-21 | 2020-01-07 | 云南大红山管道有限公司 | Protection device and method for low-pressure system equipment for ore pulp pipeline transportation |
| CN114321727A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Transport process for transporting chemical fluids using long distance pipelines |
| CN114791088A (en) * | 2022-04-06 | 2022-07-26 | 云南大红山管道有限公司 | Adding device and adding control method for lime milk in slurry pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104295906A (en) * | 2014-10-13 | 2015-01-21 | 云南大红山管道有限公司 | Multi-pipeline and multi-station pulp pipe conveying system and pulp conveying control method |
| CN106929668A (en) * | 2017-03-29 | 2017-07-07 | 中国恩菲工程技术有限公司 | It is a kind of to improve the method that lateritic nickel ore high pressure leaches the mesohigh kettle feed pump check valve life-span |
| CN109556669A (en) * | 2017-09-26 | 2019-04-02 | 西安国仪测控设备有限公司 | Hyperfrequency mass flowmenter and method |
| CN110657350A (en) * | 2019-08-21 | 2020-01-07 | 云南大红山管道有限公司 | Protection device and method for low-pressure system equipment for ore pulp pipeline transportation |
| CN114321727A (en) * | 2020-09-29 | 2022-04-12 | 宝山钢铁股份有限公司 | Transport process for transporting chemical fluids using long distance pipelines |
| CN114791088A (en) * | 2022-04-06 | 2022-07-26 | 云南大红山管道有限公司 | Adding device and adding control method for lime milk in slurry pipeline |
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