CN204917976U - Phosphoric acid by wet process production extraction tank improves structure - Google Patents
Phosphoric acid by wet process production extraction tank improves structure Download PDFInfo
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- CN204917976U CN204917976U CN201520603254.2U CN201520603254U CN204917976U CN 204917976 U CN204917976 U CN 204917976U CN 201520603254 U CN201520603254 U CN 201520603254U CN 204917976 U CN204917976 U CN 204917976U
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- extraction tank
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- phosphoric acid
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Abstract
The utility model relates to a phosphoric acid by wet process production extraction tank growing the grain start field, especially, phosphoric acid by wet process production extraction tank improves structure, through with extraction tank no. 1 and extraction tank no. 2 and shurry pump no. 1 and shurry pump through the pipeline intercommunication between two, and on the pipeline setting valve, valve on the geminate transistors line is adjusted and is controlled again, make phosphoric acid by wet process production extraction tank through two parallelly connected modes, when carrying out an extraction tank maintenance, can continue with the production of extraction tank binary row, wait to overhaul after the completion, starch to an extraction tank feed by extraction tank no. 2, make the production environment in the extraction tank no. 1 can reach the production requirement in the short time, when overhauing extraction tank no. 2, provide the ground paste through extraction tank no. 1, shorten the growing the grain available machine time to the extraction tank after the maintenance, and production capacity is improved, technological index can resume normal production state as early as possible, the cost is lowered, save the steam consumption, improve the unit interval productivity, reduce water resource consumption volume.
Description
Technical field
The utility model relates to Wet-process Phosphoric Acid Production extraction tank growing the grain start technical field, especially a kind of Wet-process Phosphoric Acid Production extraction tank modified node method.
Background technology
Phosphoric acid is important intermediate chemicals, at present, the production of phosphoric acid mainly adopts thermal phosphoric acid or phosphoric acid by wet process to produce, and in wet method phosphoric acid manufacture process, is adopt sulfuric acid decomposition phosphorus ore to obtain, and this process mainly rear product obtained of crystal of calcium sulfate precipitation, but in the technique of Wet-process Phosphoric Acid Production phosphoric acid, have two clear and definite requirements to crystal of calcium sulfate, one is the dimensionally stable guaranteeing calcium sulphate crystal, do not change in process of production, guarantee normally carrying out of production; Two is that requirement crystallization is thick, neatly even, has good filtration and scourability.And above-mentioned crystallisation process carries out in the extraction tank of Wet-process Phosphoric Acid Production; and for the requirement of calcium sulphate crystal shape; it is inseparable with the environment of crystal formed, and namely controls outbalance with the environment in extraction tank and condition when carrying out original startup-shutdown to extraction tank exactly.
In the prior art, because Wet-process Phosphoric Acid Production extraction tank is difficult to avoid because of the defect that structure deteriorate is shut down or planned shut-down overhauls in process of production, and after maintenance down completes, the starting-up method of general employing adds depth of water 4.8m in extraction tank, adjustment temperature wherein rises to 60 DEG C, and add sulfuric acid wherein and phosphate ore pulp carries out growing the grain, the shape that formed of analyzing crystal and size and uniformity coefficient under the microscope again, and then determine the need of continuation growing the grain or filter phosphoric acid, and this process generally needs 16 hours, and then the cycle of extraction tank in start process causing Wet-process Phosphoric Acid Production is longer, control difficulty larger, production cost is higher.
In addition, in prior art, the start of extraction tank is adopted and add water to 4.8 meters high to reactive tank, digestive shelf, start slurry circulation pump and digestive shelf stirring rake, to reaction, in digestive shelf, add steam, guarantee that the temperature rise rate reacting solution in digestive shelf is less than 2 DEG C/h, until constant temperature 8 hours after 60 DEG C, take out heating tube, start reactive tank stirring rake successively, add appropriate sulfuric acid, the SO of regulator solution
3concentration is 0.020 ~ 0.040g/ml, according to SO
3analytical data, regulates ore pulp and vitriolic acid flux respectively.
As can be seen here, following technological deficiency is also there is: the water resources of wasting 2000 cubic metres nearly in prior art, and extend the time of system to phosphoric acid concentration concentrate, extend process cycle, increase cost, and when starting shooting, without any crystal seed and nucleus in extraction tank, and then cause the crystal seed in extraction tank and nucleus generation to need certain hour, and then extend rearing crystal time and on time; Need a large amount of steam to process extraction tank again, and then cause thermal waste, water of condensation increases.
Utility model content
In order to solve the above-mentioned technical problem existed in prior art, the utility model provides a kind of Wet-process Phosphoric Acid Production extraction tank modified node method and to the quick growing the grain starting-up method of extraction tank.
Be achieved particular by following technical scheme:
A kind of Wet-process Phosphoric Acid Production extraction tank modified node method, is be communicated with by pipeline with extraction tank two and between shurry pump one and shurry pump two by extraction tank one, and on pipeline, arranges valve control.
It is be communicated with by pipeline between extraction tank one with extraction tank two that described pipeline is communicated with, and on this pipeline, valve one, valve two, valve three, valve four are set by extraction tank one to extraction tank two, wherein between valve one and valve two, be provided with a bifurcations, this bifurcations is connected with shurry pump one by pipeline, and is provided with valve five on this pipeline; Between valve three and valve four, be provided with a bifurcations, this bifurcations is connected with shurry pump two by pipeline, and is provided with valve six on this pipeline.
Described shurry pump one is connected by pipeline with between extraction tank one, and is provided with valve seven on this pipeline; Described shurry pump two is connected by pipeline with between extraction tank two, and is provided with valve eight on this pipeline.
The quick growing the grain starting-up method of a kind of Wet-process Phosphoric Acid Production extraction tank, comprises the following steps:
(1) two are adopted to carry out combination treatment Wet-process Phosphoric Acid Production extraction tank, and adopt pipeline to be communicated with by between two extraction tanks, and on pipeline, adopt valve control, simultaneously, also two shurry pumps are installed between two extraction tanks, and be communicated with extraction tank with pipeline respectively and be communicated with the pipeline between two extraction tanks, and install valve on pipeline; It is particularly: adopt the extraction tank one of Wet-process Phosphoric Acid Production to carry out combination treatment with extraction tank two, and between extraction tank one and extraction tank two installation pipeline, this pipeline is installed valve one, valve two, valve three, valve four, and a branch is set between valve one and valve two, this branch is connected with shurry pump one through pipeline, and arranges valve five and control; Between valve three and valve four, arrange a branch, this branch is communicated with shurry pump two through pipeline, and arranges valve six and control; , also shurry pump one is connected with extraction tank one meanwhile, and between this connection, adopts valve seven to control; Shurry pump two is connected with extraction tank two, and between this connection, adopts valve eight to control;
(2) to be installed good after, if overhaul extraction tank one, after Awaiting Overhaul, in extraction tank one, add the dark sewage of 0.5-1m or service water, start shurry pump two, open valve six, valve three, valve two, valve one, valve eight, shut-off valve four, valve seven, and then provide slip crystal seed and nucleus for extraction tank one, and phosphate ore pulp and sulfuric acid is increased in extraction tank two, and the add-on controlling the phosphate ore pulp in extraction tank one is 80-100m
3/ h, after the liquid level in groove one to be extracted floods stirring rake, starts stirring rake and exhaust fan, is negative pressure in adjustment extraction tank one, then adjusts and add speed for 20m with sulfuric acid
3/ h, phosphate ore pulp 30m
3/ h joins in extraction tank one, and controls heat-up rate≤5 in extraction tank one DEG C/h; When liquid level in groove one to be extracted rises to overflow port, close shurry pump two, shut-off valve valve six, valve three, valve two, valve one, valve eight, open valve seven, and it produced according to normal phosphoric acid by wet process, filters; If overhaul extraction tank two, after Awaiting Overhaul, the dark sewage of 0.5-1m or service water is added in extraction tank two, start shurry pump one, open valve five, valve three, valve two, valve four, valve seven, shut-off valve one, valve eight, and then provide slip crystal seed and nucleus for extraction tank two, and increase phosphate ore pulp and sulfuric acid in extraction tank one, and the add-on controlling the phosphate ore pulp in extraction tank two is 80-100m
3/ h, after the liquid level in groove two to be extracted floods stirring rake, starts stirring rake and exhaust fan, is negative pressure in adjustment extraction tank two, then adjusts and add speed for 20m with sulfuric acid
3/ h, phosphate ore pulp 30m
3/ h joins in extraction tank two, and controls heat-up rate≤5 in extraction tank two DEG C/h; When liquid level in groove two to be extracted rises to overflow port, close shurry pump one, shut-off valve five, valve three, valve two, valve four, valve seven, open valve eight, and it produced according to normal phosphoric acid by wet process, filters.
The concentration of described sulfuric acid is 98-99%.
The phosphorus content of described phosphate ore pulp is 30-35%.
The concentration of described sulfuric acid is 98.3%.
The phosphorus content of described phosphate ore pulp is 33%.
Compared with prior art, technique effect of the present utility model is embodied in:
By extraction tank one is communicated with extraction tank two and between shurry pump one and shurry pump two by pipeline, and on pipeline, arrange valve control, again through carrying out adjusting to the valve on pipeline and controlling, and then make Wet-process Phosphoric Acid Production extraction tank through two modes in parallel, when carrying out extraction tank one and overhauling or keep in repair, can continue to produce with extraction tank two, and then after Awaiting Overhaul completes, by extraction tank two to extraction tank one feed slurry, make the production environment in extraction tank one can reach production requirement at short notice, equally when maintenance extraction tank two, slip is provided by extraction tank one, and then shorten the growing the grain on time of the extraction tank after to maintenance, improve turnout, reduce energy consumption, save cost.
Especially through controlling with closed the unlatching of the valve in whole process system, and then make at an extraction tank after maintenance completes, growing the grain process can be completed fast, and then shorten the extraction tank on time, accelerate the further production of phosphoric acid by wet process, improve production output, technic index can return to normal production status as early as possible, reduce cost, improve the productive rate of unit time, reduce the consumption of water resources.
Accompanying drawing explanation
Fig. 1 is Wet-process Phosphoric Acid Production extraction tank modified node method schematic diagram of the present utility model.
1-extraction tank one 2-extraction tank two 3-flasher 4-vacuum pumping pump 5-shurry pump one 6-shurry pump two 7-vacuum filter 8-phosphoric acid holding tank 9-sulfuric acid tank 10-phosphorus ore stock tank 11-valve one 12-valve two 13-valve three 14-valve four 15-valve five 16-valve six 17-valve seven 18-valve eight.
A-emptying B-phosphoric acid loop.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment, further restriction is done to the technical solution of the utility model, but claimed scope is not only confined to done description.
Embodiment 1
As shown in Figure 1, Wet-process Phosphoric Acid Production system of the prior art is extraction tank 1, and extraction tank 1 is connected in sulfuric acid tank 9, phosphorus ore stock tank 10, for supplying sulfuric acid and phosphate ore pulp, on extraction tank 1, be provided with emptying A and phosphoric acid loop B entrance and the flashed filter of low level simultaneously, namely be exactly flasher 7, flasher 7 tail end is connected with vacuum pumping pump 4; Extraction tank one is connected with shurry pump 1 by pipeline, and shurry pump 1 is connected with vacuum filter 7, and vacuum filter 7 is connected with phosphoric acid loop B entrance, and is connected with phosphoric acid holding tank 8; Above-mentioned two Wet-process Phosphoric Acid Production systems are carried out the production phosphoric acid that is together in parallel through exploring by the present invention, and the pipeline line by the extraction tank 22 in the extraction tank 1 in First Wet-process Phosphoric Acid Production system and shurry pump 1 and second Wet-process Phosphoric Acid Production system and shurry pump between 6 carries out adjusting and installing, be communicated with by pipeline with extraction tank 22 and between shurry pump 1 and shurry pump 26 by extraction tank 1, and on pipeline, arrange valve control.
It is be communicated with by pipeline between extraction tank 1 with extraction tank 22 that described pipeline is communicated with, and on this pipeline, valve 1, valve 2 12, valve 3 13, valve 4 15 are set by extraction tank 11 to extraction tank 22, wherein between valve 1 and valve 2 12, be provided with a bifurcations, this bifurcations is connected with shurry pump 1 by pipeline, and is provided with valve 5 14 on this pipeline; Between valve 3 13 and valve 4 15, be provided with a bifurcations, this bifurcations is connected with shurry pump 26 by pipeline, and is provided with valve 6 16 on this pipeline.
Described shurry pump 1 is connected by pipeline with between extraction tank 1, and is provided with valve 7 17 on this pipeline; Described shurry pump 26 is connected by pipeline with between extraction tank 22, and is provided with valve 8 18 on this pipeline.
Embodiment 2
As shown in Figure 1, the quick growing the grain starting-up method of a kind of Wet-process Phosphoric Acid Production extraction tank, comprises the following steps:
(1) two are adopted to carry out combination treatment Wet-process Phosphoric Acid Production extraction tank, and adopt pipeline to be communicated with by between two extraction tanks, and on pipeline, adopt valve control, simultaneously, also two shurry pumps are installed between two extraction tanks, and be communicated with extraction tank with pipeline respectively and be communicated with the pipeline between two extraction tanks, and install valve on pipeline; It is particularly: adopt the extraction tank 1 of Wet-process Phosphoric Acid Production to carry out combination treatment with extraction tank 22, and between extraction tank 1 and extraction tank 22 installation pipeline, this pipeline is installed valve 1, valve 2 12, valve 3 13, valve 4 15, and a branch is set between valve 1 and valve 2 12, this branch is connected with shurry pump 1 through pipeline, and arranges valve 5 14 and control; Between valve 3 13 and valve 4 15, arrange a branch, this branch is communicated with shurry pump 26 through pipeline, and arranges valve 6 16 and control; , also shurry pump 1 is connected with extraction tank 1 meanwhile, and between this connection, adopts valve 7 17 to control; Shurry pump 26 is connected with extraction tank 22, and between this connection, adopts valve 8 18 to control;
(2) to be installed good after, if overhaul extraction tank 1, after Awaiting Overhaul, in extraction tank 1, add the dark sewage of 0.5-1m or service water, start shurry pump 26, open valve 6 16, valve 3 13, valve 2 12, valve 1, valve 8 18, shut-off valve 4 15, valve 7 17, and then provide slip crystal seed and nucleus for extraction tank 1, and phosphate ore pulp and sulfuric acid is increased in extraction tank 22, and the add-on controlling the phosphate ore pulp in extraction tank 1 is 80-100m
3/ h, after the liquid level in groove 1 to be extracted floods stirring rake, starts stirring rake and exhaust fan, is negative pressure in adjustment extraction tank 1, then adjusts and add speed for 20m with sulfuric acid
3/ h, phosphate ore pulp 30m
3/ h joins in extraction tank 1, and controls heat-up rate≤5 in extraction tank 1 DEG C/h; When liquid level in groove 1 to be extracted rises to overflow port, close shurry pump 26, shut-off valve valve 6 16, valve 3 13, valve 2 12, valve 1, valve 8 18, open valve 7 17, and it produced according to normal phosphoric acid by wet process, filters; If overhaul extraction tank 22, after Awaiting Overhaul, the dark sewage of 0.5-1m or service water is added in extraction tank 22, start shurry pump 1, open valve 5 14, valve 3 13, valve 2 12, valve 4 15, valve 7 17, shut-off valve 1, valve 8 18, and then provide slip crystal seed and nucleus for extraction tank 22, and increase phosphate ore pulp and sulfuric acid in extraction tank 1, and the add-on controlling the phosphate ore pulp in extraction tank 22 is 80-100m
3/ h, after the liquid level in groove 22 to be extracted floods stirring rake, starts the aircraft of stirring rake and tail gas, is negative pressure in adjustment extraction tank 22, then adjusts and add speed for 20m with sulfuric acid
3/ h, phosphate ore pulp 30m
3/ h joins in extraction tank 22, and controls heat-up rate≤5 in extraction tank 22 DEG C/h; When liquid level in groove 22 to be extracted rises to overflow port, close shurry pump 1, shut-off valve valve 5 14, valve 3 13, valve 2 12, valve 4 15, valve 7 17, open valve 8 18, and it produced according to normal phosphoric acid by wet process, filters.
The concentration of described sulfuric acid is 98.3%.
The phosphorus content of described phosphate ore pulp is 33%.
In addition, the concentration of described sulfuric acid is 98%.
The phosphorus content of described phosphate ore pulp is 30%.
In addition, the concentration of described sulfuric acid is 99%.
The phosphorus content of described phosphate ore pulp is 35%.
Claims (3)
1. a Wet-process Phosphoric Acid Production extraction tank modified node method, it is characterized in that, be that extraction tank one (1) is communicated with by pipeline with extraction tank two (2) and between shurry pump one (5) and shurry pump two (6), and on pipeline, arrange valve control.
2. Wet-process Phosphoric Acid Production extraction tank modified node method as claimed in claim 1, it is characterized in that, it is be communicated with by pipeline between extraction tank one (1) with extraction tank two (2) that described pipeline is communicated with, and by extraction tank one (1), valve one (11) is set to extraction tank two (2) on this pipeline, valve two (12), valve three (13), valve four (15), wherein between valve one (11) and valve two (12), be provided with a bifurcations, this bifurcations is connected with shurry pump one (5) by pipeline, and on this pipeline, be provided with valve five (14), between valve three (13) and valve four (15), be provided with a bifurcations, this bifurcations is connected with shurry pump two (6) by pipeline, and on this pipeline, be provided with valve six (16).
3. Wet-process Phosphoric Acid Production extraction tank modified node method as claimed in claim 1, it is characterized in that, described shurry pump one (5) is connected by pipeline with between extraction tank one (1), and on this pipeline, be provided with valve seven (17); Described shurry pump two (5) is connected by pipeline with between extraction tank two (2), and on this pipeline, be provided with valve eight (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520603254.2U CN204917976U (en) | 2015-08-12 | 2015-08-12 | Phosphoric acid by wet process production extraction tank improves structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520603254.2U CN204917976U (en) | 2015-08-12 | 2015-08-12 | Phosphoric acid by wet process production extraction tank improves structure |
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| CN204917976U true CN204917976U (en) | 2015-12-30 |
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| CN201520603254.2U Withdrawn - After Issue CN204917976U (en) | 2015-08-12 | 2015-08-12 | Phosphoric acid by wet process production extraction tank improves structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084332A (en) * | 2015-08-12 | 2015-11-25 | 贵州开磷集团股份有限公司 | Improvement structure for wet-process phosphoric acid production extraction tanks and crystal quick growing starting method for extraction tanks |
-
2015
- 2015-08-12 CN CN201520603254.2U patent/CN204917976U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084332A (en) * | 2015-08-12 | 2015-11-25 | 贵州开磷集团股份有限公司 | Improvement structure for wet-process phosphoric acid production extraction tanks and crystal quick growing starting method for extraction tanks |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20180313 |
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| AV01 | Patent right actively abandoned |