CN203810050U - Low-corrosion slurry pipe conveying system - Google Patents
Low-corrosion slurry pipe conveying system Download PDFInfo
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- CN203810050U CN203810050U CN201420192376.2U CN201420192376U CN203810050U CN 203810050 U CN203810050 U CN 203810050U CN 201420192376 U CN201420192376 U CN 201420192376U CN 203810050 U CN203810050 U CN 203810050U
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- slurry
- pump
- sodium
- monosulfite
- pipeline
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Abstract
The utility model provides a low-corrosion slurry pipe conveying system which comprises a sodium sulfite adding device, a water supply pipe, a feeding pump, a conveying main pump and a slurry conveying main pipe. Sodium sulfite solutions provided by the sodium sulfite adding device and production water provided by the water supply pipe are supplied to an inlet pipe of the feeding pump according to a preset proportional relation, the proportional relation enables the sodium sulfite solutions to be capable of basically eliminating dissolved oxygen in the production water, an outlet pipe of the feeding pump is connected to the conveying main pump, and an outlet pipe of the conveying main pump is connected to the slurry conveying main pipe. According to conveyed fluid, causing slurry pipe corrosions and serving as a corrosion source, in the pipes, the problem of corrosions on the inner walls of the pipes is solved by changing rheological behaviors of the conveyed fluid in the pipes, the service life of the slurry pipes is prolonged, and the using safety of the slurry pipes is improved.
Description
Technical field
The utility model relates to Technology of Slurry Pipeline Delivery field, relates to more specifically a kind of a kind of Slurry Pipeline Transportation system that can effectively lower slurry pipeline inner wall corrosion.
Background technique
Conveyance conduit majority in prior art in Slurry Pipeline Transportation system is all made by low carbon steel, especially iron ore concentrate conveying pipeline, this low carbon steel pipeline can be corroded and deterioration in the process of slurry body, the metal loss that this corrosion and wearing and tearing cause occupies main status in piping design, and the internal corrosion of slurry transportation pipeline is obviously different from the corrosive pipeline of simple conveying fluid, the further accelerated corrosion rate of a large amount of existence meetings of solid particle in slurry, also tube wall can wear and tear simultaneously, therefore in the time selecting pipe wall, must consider the corrosion allowance of the length of service, the actual life of existing long-distance slurry piping design is generally 20 years ~ and 30 years.Therefore how to reduce to greatest extent corrosion and the deterioration of slurry pipeline, improve pipeline and be significant for Technology of Slurry Pipeline Delivery working life.
Corrosive pipeline is different from wearing and tearing, it is in fact a kind of electrochemical reaction, there is corrosion and need to possess following factors: the anode of burning, the negative electrode of oxygenant reduction, electrode conductor-electrolyte solution between anode and negative electrode, therefore can react to limit by the male or female of passivation tube wall the generation of corrosion, this is also the topmost corrosive pipeline controlling method of current employing, but along with the continuous wearing and tearing of solid particle in long use and slurry, the passivating layer of inner-walls of duct can be little by little destroyed, thereby the slurry that makes the pipe section branch exposing continue to be carried in it corrodes, having a strong impact on the working life of slurry pipeline and using safety.
Summary of the invention
The utility model is based on above-mentioned prior art problem, in causing slurry pipeline pipeline corrosion, as source of corrosion, carry fluid, carry the self-characteristic of fluid to solve the etching problem of inner-walls of duct by changing in pipeline, the first passage of innovation is eliminated the dissolved oxygen of producing in water and is eliminated the corrosivity of carrying fluid self in pipeline, and then reduced greatly the rate of corrosion of conveyance conduit, improve pipeline working life and used safety.
It is as follows that the utility model solves the problems of the technologies described above taked technological scheme:
A kind of Slurry Pipeline Transportation system of low corrosion, comprise sodium monosulfite adding set, water supply line 10, feeding pump 5, carry main pump 6 and slurry to carry main pipeline 14, the production water that the sodium sulfite solution that described sodium monosulfite adding set provides and described water supply line 10 provide is supplied to by predetermined ratio in the inlet pipe of described feeding pump 5, the outlet conduit of described feeding pump 5 is connected in described conveying main pump 6, the outlet conduit of described conveying main pump 6 is connected in described slurry and carries main pipeline 14, carry main pipeline 14 that the production water of basic elimination dissolved oxygen is provided by described feeding pump 5 and conveying main pump 6 to described slurry.
Further according to Slurry Pipeline Transportation system described in the utility model, wherein said sodium monosulfite adding set comprises agitating vessel 1, holding tank 2, filter 3 and sodium monosulfite metering pump 4, the bottom outlet of described agitating vessel 1 is connected in described holding tank 2, the bottom outlet of described holding tank 2 is connected in described filter 3, the outlet of described filter 3 is connected in the inlet pipe of described sodium monosulfite metering pump 4, and the outlet conduit of described sodium monosulfite metering pump 4 and described water supply line 10 are connected in the inlet pipe of described feeding pump 5 jointly.
Further, according to Slurry Pipeline Transportation system described in the utility model, on wherein said water supply line 10, be provided with flow control valve 11, on the outlet conduit of described feeding pump 5, be provided with concentration detector 13.
Further according to Slurry Pipeline Transportation system described in the utility model, wherein said sodium monosulfite adding set also includes sodium monosulfite loader 9, filter screen 8 and supply pipe 7, described filter screen 8 is positioned over the opening top of described agitating vessel 1, described sodium monosulfite loader 9 is arranged on described filter screen 8, and described supply pipe 7 is connected in the top entrance of described agitating vessel 1.
Further according to Slurry Pipeline Transportation system described in the utility model, the bottom outlet of wherein said filter 3 is connected with many pumping branch roads, every pumping branch road has included a described sodium monosulfite metering pump 4, described feeding pump 5 and a described water supply line 10, the inlet pipe of the sodium monosulfite metering pump 4 in every pumping branch road is connected in the bottom outlet of described filter 3, and the outlet conduit of sodium monosulfite metering pump 4 and a corresponding water supply line are connected in the inlet pipe of corresponding feeding pump jointly.
Further, according to Slurry Pipeline Transportation system described in the utility model, wherein on each described water supply line 10, be provided with flow control valve, on the outlet conduit of each described feeding pump, be provided with concentration detector 13.
At least can reach following technique effect by the technical solution of the utility model:
1), by eliminate be filled with in pipeline transfer ore pulp gap for emptying the dissolved oxygen of production water of pipeline, the inner-walls of duct corrosion of having avoided itself and inner-walls of duct low carbon steel to react and to cause, and then stopped inner-walls of duct corrosion from root, greatly improve pipeline working life and Slurry Pipeline Transportation efficiency.
2), the integral arrangement of Slurry Pipeline Transportation system described in the utility model is easy, can be by the corrosion control of inner-walls of duct within minimum zone without Slurry Pipeline Transportation structure being carried out to large variation, and improved Slurry Pipeline Transportation safety.
Brief description of the drawings
Accompanying drawing 1 is the overall structure schematic diagram of Slurry Pipeline Transportation system described in the utility model.
In figure, the implication of each reference character is as follows:
1-agitating vessel, 2-holding tank, 3-filter, 4-sodium monosulfite metering pump, 5-feeding pump, 6-carries main pump, 7-supply pipe, 8-filter screen, 9-sodium monosulfite loader, 10-water supply line, 11-flow control valve, 12-feeding pump inlet pipe, 13-concentration detector, 14-slurry is carried main pipeline.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail, so that those skilled in the art can more clearly understand the utility model, but does not therefore limit protection domain of the present utility model.
First brief description know-why of the present utility model.In Slurry Pipeline Transportation field, after mixing with liquid solvent, solid material to be conveyed forms the slurry shape with mobility, then grow the conveying of distance by pipeline, according to pipeline transportation process requirement, in the conveying gap of ore pulp slurry, what need batch carries production water to empty pipeline in pipeline, prevent that continuous slurry conveying from causing line clogging, that is to say in the time utilizing pipeline slurry body, carry complete or slurry to switch the gap of conveying at pumping plant at slurry, need to empty carrying the pipeline of slurry to clean with producing water, this is the technique using in most Slurry Pipeline Transportation.And in this production water, often contain a large amount of dissolved oxygens, these dissolved oxygens can react with the low carbon steel of inner-walls of duct, and then corrosion pipeline inwall, therefore the one of the main reasons that causes slurry pipeline corrosion in practice is exactly dissolved oxygen and the reacting of inner-walls of duct, technology starting point of the present utility model is exactly to reduce its corrosion to inner-walls of duct by removing the dissolved oxygen in production water used in slurry course of conveying, and then extends the working life of pipeline.
In related domain sodium monosulfite can perform well in the cleaning reaction of dissolved oxygen, under normality, sodium monosulfite is white powder or the crystallization of hexagonal prism shape, with strong sulfur dioxide smell, soluble in water, its aqueous solution react acid, is insoluble in ethanol, be insoluble to liquid chlorine and ammonia, when use, add appropriate catalyzer, as the salt of Cu, Co, Mn, Ni, can further improve deoxygenation rate.The utility model innovation this cheap sodium monosulfite is applied in Slurry Pipeline Transportation system; design a set of sodium monosulfite (Na2SO3) adding set for the production water supply option of slurry pipeline and eliminate the dissolved oxygen in the production water being pumped in slurry pipeline; while uses the alkaline oxygen-removing water that has removed peroxide and be added with certain concentration (as 200mg/L) sodium monosulfite to be full of in the time that pipeline is stopped using, and protects the metallic walls of pipeline not corroded with this.For the ore pulp slurry of carrying in pipeline, because most slurries are magnetic separation ore pulps, ore pulp itself just has certain deoxygenation, so there is no need to add again sodium monosulfite in the ore pulp slurry of carrying, therefore the interim that the utility model is mainly carried iron ore concentrate ore pulp at pipeline is added sodium monosulfite while producing water toward carrying in pipeline, eliminate the dissolved oxygen of producing in water and can reduce to greatest extent the oxide etch effect to pipeline, thereby effectively protect pipeline, because the corrosion of inner-walls of duct is as described above mainly dissolved oxygen corrosion, lower mask body is described the technical solution of the utility model.
As shown in Figure 1, the Slurry Pipeline Transportation system of low corrosion described in the utility model comprises agitating vessel 1, holding tank 2, filter 3, sodium monosulfite metering pump 4, feeding pump 5, carries main pump 6, supply pipe 7, filter screen 8, sodium monosulfite loader 9, production water water supply line 10, flow control valve 11, concentration detector 13 and slurry to carry main pipeline 14.Because sodium monosulfite is easily oxidized in air, therefore unsuitable long time stored after preparation, need in the time of each use, prepare, the utility model is in the time that it uses first 1 hour, by sodium monosulfite artificial loading in sodium monosulfite loader 9, below described sodium monosulfite loader 9 outlets, be disposed with filter screen 8 and agitating vessel 1, and described filter screen 8 is placed in the opening top of agitating vessel 1, in sodium monosulfite loader 9, the solid sodium sulfite of prearranging quatity falls into agitating vessel 1 after filter screen 8 filters, described supply pipe 7 is connected in the top entrance of agitating vessel 1, for add the process water as sodium monosulfite dissolution solvent in agitating vessel, extremely low ignoring of this technique content of oxygen dissolved in water, in described agitating vessel 1, carry out the configuration of sodium sulfite solution, and constantly stir, the concentration of described sodium sulfite solution should be in 10-20%, preferably between 12-15%, control the supply ratio of sodium monosulfite and process water with this concentration, the bottom outlet of described agitating vessel 1 is connected in holding tank 2, described holding tank 2 is interior for storing the sodium sulfite solution that stirs and fully dissolve, mass concentration is wherein in 10-20%, be preferably between 12-15%, described agitating vessel and holding tank preferably adopt height and diameter to be the cylindrical drum of 1.5 meters, the bottom outlet of described holding tank 2 is connected in filter 3, described filter 3 is for the final step filter operation before sodium sulfite solution in holding tank is used, the outlet of described filter 3 is connected in sodium monosulfite metering pump 4 by pipeline, the water supply line 10 of the outlet conduit of described sodium monosulfite metering pump 4 and production water is connected in the feeding pump inlet pipe 12 of described feeding pump 5 jointly, thereby the production water that the sodium sulfite solution providing by sodium monosulfite metering pump 4 provides with water supply line 10 is exported by feeding pump 5 pumpings after the interior abundant dilution of feeding pump inlet pipe 12 mixes, described sodium monosulfite metering pump 4 can be controlled the pumping adding quantity of sodium sulfite solution, on described water supply line 10, be further provided with flow control valve 11 simultaneously, can regulate the water output of water supply line 10 by flow control valve 11, the utility model is carried practical studies and summary of experience based on long-term pipeline, sodium sulfite solution by mass concentration between 10-20% cleans with producing after water mixes and is pumped in slurry conveying main pipeline and can be good at removing the dissolved oxygen of producing in water according to the volume ratio of approximate 1:1 and slurry pipeline system, and can remove and between efficiency, obtain optimum balance at cost of production and dissolved oxygen, therefore preferably under described sodium monosulfite metering pump 4 and flow control valve 11 controls, make sodium monosulfite metering pump 4 and water supply line 10 substantially equal to the liquid supply of feeding pump inlet pipe 12, ensure that sodium sulfite solution and the volume ratio of producing water approach 1:1.The concentration of carrying the sodium sulfite solution in main pipeline for further ensureing to enter slurry, on the outlet conduit of described feeding pump 5, be further provided with concentration detector 13, enter for detecting in real time sodium sulfite solution concentration and/or the dissolved oxygen concentration of in slurry conveying main pipeline, producing water, testing result based on described concentration detector 13 is adjusted the pump output of sodium monosulfite metering pump 4 and the controlled quentity controlled variable of flow control valve 11 in real time simultaneously, when the concentration of sodium sulfite detecting on the low side in 5% and/or dissolved oxygen during higher than predetermined amount, suitably increase the pump output of diaphragm metering pump 4 and/or reduce the water output of water supply line by flow control valve 11, vice versa, thereby control accurately the adding quantity of sodium sulfite solution, ensure deoxygenation rate.In order further to improve the interpolation efficiency of sodium sulfite solution, can be connected with many pumping branch roads at the bottom outlet of described filter 3, two pumping branch roads that are parallel to each other as shown in Figure 1, every pumping branch road has included a sodium monosulfite metering pump 4, , water supply line 10 and a feeding pump 5, the bottom outlet pipeline of filter 3 is divided into the inlet pipe that connects respectively two sodium monosulfite metering pumps 4 after two branch roads, described water supply line is connected in respectively the inlet pipe of a corresponding feeding pump jointly with a corresponding sodium monosulfite metering pump outlet conduit, on two water supply lines 10, be provided with flow control valve simultaneously, on the outlet conduit of two feeding pumps, be also provided with concentration detector 13, by this multiple branch circuit set-up mode, in improving sodium sulfite solution efficiency of supply, can also avoid causing because of the damage maintenance of feeding pump or metering pump in a branch road shutdown of whole pumping system.The outlet conduit of described feeding pump is connected in the inlet pipe of carrying main pump 6; the outlet conduit of described conveying main pump 6 is connected in slurry and carries main pipeline 14; thereby the described sodium sulfite solution configuring by predetermined concentration is carried in main pipeline 14 by carrying main pump 6 to be pumped to slurry, carries out cleaning and the anti-corrosion protection of slurry conveying main pipeline in slurry conveying gap.
Above-mentioned agitating vessel 1, holding tank 2, filter 3, sodium monosulfite metering pump 4, supply pipe 7, filter screen 8, sodium monosulfite loader 9 grades form sodium monosulfite adding set together, carry main pipeline that sodium sulfite solution is provided by this device to conveying main pump and slurry, preferred described sodium monosulfite adding set is arranged at the inception point of Slurry Pipeline Transportation system, and the point of addition of sodium sulfite solution is generally carried the low pressure position of main pipeline in slurry, according to common pipeline slurry body gap technique, duct length and internal diameter requirement, the solid consumption of sodium monosulfite is typically about 0.01t/h, need 36 hours because once pipeline being filled to production water, so scale is 0.36t/ time, sodium sulfite solution adding quantity is about 3.24m
3/ time.
The Slurry Pipeline Transportation method of corroding by the reduction inner-walls of duct of System Implementation described in the utility model specifically comprises following key step:
(1) according to slurry delivery interval operational characteristic and conveyance conduit size relationship, the sodium sulfite solution of preparation quality concentration between 10-20%, and be stored in holding tank for subsequent use.
(2) carry gap at slurry, utilize the sodium sulfite solution that metering pump makes step (1) to be supplied to according to the relation of 1:1 in the inlet pipe of feeding pump with production water, fully dilution mixes and utilizes the reducibility of sodium monosulfite to remove the dissolved oxygen of producing in water, then be pumped to by feeding pump the inlet pipe of carrying main pump, carry the cleaning of carrying out pipeline in main pipeline to empty by carrying main pump to be pumped to slurry again, and be full of whole slurry conveying main pipeline.
(3) when pending next slurry is carried, close each valve and pump and produce water to stop carrying main pipeline supply to clean to described slurry, utilize slurry pumping system to carry main pipeline pumping ore pulp slurry to be conveyed to slurry.
The utility model is by the cleaning process in pipeline slurry body gap, to the sodium monosulfite that adds certain concentration in the production water as rinse water, thereby utilize sodium sulfite solution effectively to remove and produce the dissolved oxygen in water, the oxide etch of having stopped to produce inner-walls of duct in water cleaning process, has improved pipeline working life and delivery safety.
Below be only that preferred implementation of the present utility model is described; the technical solution of the utility model is not limited to this; the any known distortion that those skilled in the art do on the basis of major technique design of the present utility model all belongs to the claimed technology category of the utility model, and the concrete protection domain of the utility model is as the criterion with the record of claims.
Claims (6)
1. the Slurry Pipeline Transportation system of a low corrosion, it is characterized in that, comprise sodium monosulfite adding set, water supply line (10), feeding pump (5), carry main pump (6) and slurry to carry main pipeline (14), the production water that the sodium sulfite solution that described sodium monosulfite adding set provides and described water supply line (10) provide is supplied to by predetermined ratio in the inlet pipe of described feeding pump (5), the outlet conduit of described feeding pump (5) is connected in described conveying main pump (6), the outlet conduit of described conveying main pump (6) is connected in described slurry and carries main pipeline (14), carry main pipeline (14) that the production water of basic elimination dissolved oxygen is provided by described feeding pump (5) and conveying main pump (6) to described slurry.
2. Slurry Pipeline Transportation system according to claim 1, it is characterized in that, described sodium monosulfite adding set comprises agitating vessel (1), holding tank (2), filter (3) and sodium monosulfite metering pump (4), the bottom outlet of described agitating vessel (1) is connected in described holding tank (2), the bottom outlet of described holding tank (2) is connected in described filter (3), the outlet of described filter (3) is connected in the inlet pipe of described sodium monosulfite metering pump (4), the outlet conduit of described sodium monosulfite metering pump (4) and described water supply line (10) are connected in the inlet pipe of described feeding pump (5) jointly.
3. Slurry Pipeline Transportation system according to claim 2, is characterized in that, is provided with flow control valve (11) on described water supply line (10), is provided with concentration detector (13) on the outlet conduit of described feeding pump (5).
4. according to the Slurry Pipeline Transportation system described in claim 2 or 3, it is characterized in that, described sodium monosulfite adding set also includes sodium monosulfite loader (9), filter screen (8) and supply pipe (7), described filter screen (8) is positioned over the opening top of described agitating vessel (1), described sodium monosulfite loader (9) is arranged on described filter screen (8), and described supply pipe (7) is connected in the top entrance of described agitating vessel (1).
5. according to the Slurry Pipeline Transportation system described in claim 2 or 3, it is characterized in that, the bottom outlet of described filter (3) is connected with many pumping branch roads, every pumping branch road has included a described sodium monosulfite metering pump (4), a described feeding pump (5) and a described water supply line (10), the inlet pipe of the sodium monosulfite metering pump (4) in every pumping branch road is connected in the bottom outlet of described filter (3), the outlet conduit of sodium monosulfite metering pump (4) and a corresponding water supply line are connected in the inlet pipe of corresponding feeding pump jointly.
6. Slurry Pipeline Transportation system according to claim 5, is characterized in that, on each described water supply line (10), is provided with flow control valve, is provided with concentration detector (13) on the outlet conduit of each described feeding pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420192376.2U CN203810050U (en) | 2014-04-21 | 2014-04-21 | Low-corrosion slurry pipe conveying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420192376.2U CN203810050U (en) | 2014-04-21 | 2014-04-21 | Low-corrosion slurry pipe conveying system |
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| CN203810050U true CN203810050U (en) | 2014-09-03 |
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|---|---|---|---|
| CN201420192376.2U Expired - Fee Related CN203810050U (en) | 2014-04-21 | 2014-04-21 | Low-corrosion slurry pipe conveying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939747A (en) * | 2014-04-21 | 2014-07-23 | 云南大红山管道有限公司 | Low-corrosion slurry pipeline conveying system and method |
-
2014
- 2014-04-21 CN CN201420192376.2U patent/CN203810050U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939747A (en) * | 2014-04-21 | 2014-07-23 | 云南大红山管道有限公司 | Low-corrosion slurry pipeline conveying system and method |
| CN103939747B (en) * | 2014-04-21 | 2016-08-24 | 云南大红山管道有限公司 | A kind of Slurry Pipeline Transportation system and method for low corrosion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20170421 |
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| CF01 | Termination of patent right due to non-payment of annual fee |