CN114293647B - Phosphogypsum regulating backwater pool design method - Google Patents
Phosphogypsum regulating backwater pool design method Download PDFInfo
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- CN114293647B CN114293647B CN202111670623.6A CN202111670623A CN114293647B CN 114293647 B CN114293647 B CN 114293647B CN 202111670623 A CN202111670623 A CN 202111670623A CN 114293647 B CN114293647 B CN 114293647B
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- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract description 128
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000013461 design Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 139
- 238000003860 storage Methods 0.000 claims abstract description 27
- 238000001704 evaporation Methods 0.000 claims abstract description 24
- 230000008020 evaporation Effects 0.000 claims abstract description 23
- 239000011148 porous material Substances 0.000 claims abstract description 22
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 8
- 210000005056 cell body Anatomy 0.000 claims description 20
- 238000004364 calculation method Methods 0.000 claims description 19
- 238000005086 pumping Methods 0.000 claims description 13
- 238000001556 precipitation Methods 0.000 claims description 12
- 229920006395 saturated elastomer Polymers 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 230000009471 action Effects 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
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- 239000011159 matrix material Substances 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000007596 consolidation process Methods 0.000 description 5
- 239000011800 void material Substances 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
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- 239000002910 solid waste Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- 231100000719 pollutant Toxicity 0.000 description 1
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Abstract
The application relates to the technical field of phosphogypsum engineering warehouse, and particularly discloses a phosphogypsum regulation backwater pool design method, which comprises the steps of regulating the backwater pool to comprise a regulating pool and a backwater pool, clarifying phosphogypsum storage yard process water through the backwater pool, then flowing into the regulating pool, wherein percolate yield influence parameters comprise three water inlet parameters of rainfall inlet quantity, dry phosphogypsum water content, sedimentation extrusion water quantity, evaporation quantity and pore interception water, and two water outlet parameters of the evaporation quantity and pore interception water. The purpose of this patent is to solve and exists because of the output uncertainty of percolate, adjusts the problem that the regulation reservoir capacity in pond is difficult to confirm.
Description
Technical Field
The application relates to the technical field of phosphogypsum engineering, in particular to a phosphogypsum regulating backwater pool design method.
Background
Phosphogypsum is solid waste generated in the production process of phosphate fertilizer, belongs to two general industrial solid waste types, has low comprehensive utilization rate at present, and most phosphogypsum is piled up by a wet method, and the yard leachate contains a large amount of phosphorus, fluoride and heavy metal substances, so that the water and soil are polluted greatly. National standards require that phosphogypsum yards must be matched with percolate facilities, but no calculation of the yield of percolate exists, and the prediction research on the yield of the percolate of the phosphogypsum yards at home and abroad is less.
In the phosphogypsum yard, the percolate regulating water return tank has multiple functions, namely the function of the water storage tank is realized, the function is determined by the characteristics of the phosphogypsum yard, and a large amount of percolate and yard water are required to be stored in the regulating tank and then reused for workshop slurry carrying; secondly, homogenizing percolate pollutants, so as to fully and uniformly mix percolate, reduce the pollution load of subsequent treatment and facilitate the tail end discharge treatment; thirdly, buffering hydraulic load of percolate, especially a large amount of acid wastewater generated in a short time in a flood season, and possibly causing serious environmental pollution accidents if the acid wastewater is directly discharged into the external environment; and fourthly, the water tank is used as a transit water tank and is used as a supply water tank for other purposes, such as recycling in production or mine mining and selecting.
In the prior art, when the design of the regulating backwater pool is carried out, the problem that the regulating reservoir capacity of the regulating backwater pool is difficult to determine due to uncertain percolate yield exists.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides the phosphogypsum adjusting backwater pool design method, which solves the problem that the adjusting reservoir capacity of the adjusting backwater pool is difficult to determine due to uncertain percolate yield when the adjusting backwater pool is designed in the prior art.
In order to solve the problems, the application adopts the following technical scheme: the phosphogypsum regulating backwater pool design method comprises a regulating pool and a backwater pool, wherein phosphogypsum yard process water flows into the regulating pool after being clarified by the backwater pool, percolate yield influence parameters comprise three water inlet parameters of rainfall inflow, dry phosphogypsum water content and sedimentation extrusion water quantity, and two water outlet parameters of evaporation capacity and pore interception water, and the regulating backwater pool design comprises the following steps;
step S1: according to the service life of phosphogypsum storage yard operation and the annual design of pile volume, determining the year of the maximum yield of percolate;
step S2: obtaining the value of the percolate yield influence parameter of the year according to the year of the maximum yield of the percolate obtained in the step S1, and calculating the average value of all the parameters;
step S3: determining the maximum output of the leachate in the month according to the maximum rainfall of the phosphogypsum yard in the place of the phosphogypsum yard for about 10 years; and taking rainfall parameters of each month in the year to calculate the yield of percolate of each month;
step S4: subtracting the current month treated water amount from the maximum percolate yield to obtain the maximum month percolate residual quantity, and accumulating data of months with positive values continuously appearing in the month percolate residual quantity to obtain the total calculated pool capacity of the regulating water return pool;
step S5: and carrying out construction of the regulating backwater pool according to the pool volume of backwater of the regulating pool.
The beneficial effect that this scheme produced is: calculating all parameters of the phosphogypsum storage yard, determining the maximum value of the output of the moon percolate, and designing the capacity of the regulating tank, so that the problem that the capacity of the regulating tank is difficult to determine in the prior art is solved; the regulating reservoir after capacity design can meet the operation requirement of phosphogypsum storage yard, and effectively reduces the occurrence of the condition that the percolate leaks out to pollute the environment due to overlarge yield of the percolate.
Further, step S11: according to the service life of phosphogypsum yard operation and the annual design of pile volume, according to the design elevation of a cut-off ditch of the yard, calculating the annual water collecting area, and according to the annual water collecting area and the annual average precipitation, calculating the annual precipitation of the yard operation period;
step S12: calculating the annual evaporation area of the storage yard according to the pile shape change and the storage yard engineering drawing;
step S13: according to the dry phosphogypsum quantity which enters each year of the yard design, calculating the water content of the dry phosphogypsum each year;
step S14: calculating the trapped water quantity of the pores of the phosphogypsum storage yard each year according to the saturated initial phosphogypsum quantity entering the storage yard each year;
step S15: calculating the annual extrusion sedimentation water quantity according to the service life of the storage yard and the annual design of the volume of the pile;
step S16: the annual inflow parameters obtained in steps S12-S15 are subtracted from the annual outflow parameters to obtain the annual leachate yield of the phosphogypsum yard. The phosphogypsum extrusion sedimentation water is added into the yield calculation of phosphogypsum percolate for the first time, so that the accuracy of the yield calculation of the phosphogypsum percolate is effectively improved, the phosphogypsum extrusion sedimentation water can be popularized and applied to the yield calculation of most phosphogypsum yard percolate, and the phosphogypsum yard water balance system design is convenient for relevant technicians to refer to.
Further, the return water pond includes cell body and clamp plate, and the clamp plate setting is in the cell body and with cell body inner wall sliding connection, clamp plate fixedly connected with flexible pipe, flexible pipe runs through the clamp plate, and cell body bottom rotates to be connected with turns over the board, turns over the board and keeps away from the one end of row's silt pipe along vertical direction fixedly connected with backup pad, and the lateral wall that the pivot was kept away from to cell body bottom is equipped with row's silt pipe, is equipped with the motorised valve in the electricity row's silt pipe, turns over the board and keeps away from the one end of row's silt pipe along vertical direction fixedly connected with backup pad, and cell body below right side wall is equipped with the motorised valve switch, and backup pad push switch makes the motorised valve close, and cell body outside rotates to be connected with first gear, and the pivot of first gear extends to cell body inside, clamp plate upper end fixedly connected with spill pole, spill pole one end be equipped with the second gear of first gear engagement and be located the cell body outside, turn over the board lower extreme and be equipped with supporting mechanism, pivot one end and supporting mechanism.
When water enters the pond, the pressure plate rises along with the rising of the water level, the telescopic pipe is compressed along with the position change of the pressure plate, phosphogypsum process water enters the water return pond through the telescopic pipe, and the telescopic pipe always contacts the water surface to play a role in drainage, so that turbulence generated by the entering water flow in the water return pond is small, and impurities such as phosphogypsum and the like contained in the process water can be quickly precipitated; when the water flow in the backwater pond is reduced, the clamp plate descends gradually, the concave rod descends along with the clamp plate, when the concave rod descends to the first gear and the first rack is meshed, the concave rod drives the first gear to rotate, the first gear rotates to enable the supporting mechanism to not limit the turning plate, the turning plate turns downwards under the action of gravity of waste materials precipitated in the pond, the supporting plate does not squeeze the electric valve switch any more after turning the turning plate, so that the electric valve is opened, the turning plate rotates to simultaneously discharge phosphogypsum impurity silt on the turning plate through the silt discharging port, and the supporting mechanism cooperates with the turning plate to rotate to support the turning plate when the turning plate is horizontal.
Further, the telescopic pipe comprises a first telescopic pipe and a second telescopic pipe, the first telescopic pipe and the second telescopic pipe are respectively connected with a water inlet pipe and a water pumping pipe, and one end of the water pumping pipe is positioned in the regulating tank and is connected with a water pumping pump. The pumping pipe is always positioned on the surface of the wastewater in the water return tank, so that the pumping pipe can conveniently and rapidly pump the wastewater, and the supernatant after precipitation in the water return tank is reduced, so that the impurities such as phosphogypsum and the like entering the water return tank are reduced.
Further, a filter screen is detachably connected to the inlet of the second telescopic pipe below the pressing plate. The filter screen is used for carrying out preliminary filtration on impurities such as phosphogypsum and the like, and the structure is simple and the installation is convenient.
Further, the one end that turns over the board and keep away from the silt discharging pipe is along vertical direction fixedly connected with backup pad, turns over board upper surface sliding connection has the ejector pad, fixedly connected with first spring between ejector pad and the backup pad, slider upper end fixedly connected with baffle, baffle slope setting, baffle one end and cell body inner wall contact. When the turning plate is inclined, the sliding block slides along the turning plate under the action of gravity, so that sundries remained on the turning plate are removed, the settled waste at the bottom of the water return tank can be removed automatically at regular intervals, manual regular cleaning is not needed, and the production and operation cost is effectively reduced; when the waste in the water return tank falls on the baffle, the waste can slide onto the turning plate through the inclined surface of the baffle, and meanwhile, the baffle can be used for placing a large volume of waste to fall down to extrude the first spring.
Further, the supporting mechanism comprises a supporting block, a sliding rod, a ratchet wheel and a pawl, wherein the supporting block is in sliding connection with the lower end face of the turning plate, one end of the sliding rod is in rotational connection with the supporting block, and the other end of the sliding rod is in spline connection with the ratchet wheel; the ratchet wheel rotates to be connected in the bottom of the box, pawl one end and ratchet meshing, the other end rotates with the bottom of the box to be connected, and the pole portion fixedly connected with of pawl is acted as go-between, and the other end and the pivot fixed connection of acting as go-between are fixed with the second spring between the pole lower surface of pawl and the bottom of the box.
When the first gear rotates, the rotating shaft is used for winding the pull wire, so that the pawl is pulled away from the ratchet wheel, the ratchet wheel is not limited any more, the sliding rod can rotate, and the supporting block can slide rightwards; when the turning plate rotates downwards, the supporting block slides rightwards relatively; then the ratchet returns under the action of the torsion spring to promote through the supporting piece and turn over the board return, the pivot is reverse when turning over the board return to relax the acting as go-between, thereby the pawl returns under the elasticity action of second spring and meshes with the ratchet, rotates the ratchet and carries out spacing, makes the supporting piece no longer slide, thereby plays the supporting role to turning over the board bottom.
Drawings
FIG. 1 is a graph showing the variation of the yard phosphogypsum leachate yield Qn over time;
FIG. 2 is a graph showing the comparison of the measured and calculated values of the elevation of the pile;
FIG. 3 is a partial cross-sectional view of an embodiment of the present application;
FIG. 4 is a front view of the water return tank of the present application;
fig. 5 is a side view of the back-pressing plate structure of the present application.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the water return tank 1, the adjusting tank 2, the pressing plate 3, the concave rod 31, the first rack 32, the telescopic pipe 4, the water inlet pipe 41, the water pumping pipe 42, the filter screen 43, the turning plate 5, the sliding block 51, the baffle plate 52, the first spring 53, the supporting plate 54, the rotating shaft 55, the first gear 56, the sludge discharging pipe 6, the switch 61, the water pump 7, the water pump valve 71, the supporting block 8, the ratchet wheel 81, the pawl 82, the second spring 83, the stay 84, the sliding rod 85 and the spillway 9.
By adopting a water balance analysis method, according to the water inflow and water outflow of the system, dividing each factor of water balance analysis of the phosphogypsum storage yard system into: the water inlet comprises precipitation Pn, dry phosphogypsum water content Rn and sedimentation extrusion water Sn; the effluent mainly includes "evaporation amount En", "pore trapped water amount In". Algebraic sum of the phosphogypsum and the water is defined as the generation quantity Qn of balance water of the phosphogypsum yard system, the generation quantity Qn of phosphogypsum percolate is defined, and the calculation model of the generation quantity of the percolate is "Qn=Rn+Pn+Sn-En+in"; the precipitation quantity Pn contains only precipitation in the region of the cut-off trench, expressed by the formula "pn=p' ×s P-n "calculate, pn is the precipitation (m) of phosphogypsum into the yard in the nth year 3 ) The method comprises the steps of carrying out a first treatment on the surface of the P' is annual average precipitation (m) 2 )；S P-n Is the catchment area (m) in the flood cut ditch of the nth yard 2 ) The method comprises the steps of carrying out a first treatment on the surface of the The evaporation capacity of the storage yard is according to the formula S E-n ＝C 1 S 1 +C 2 S 2 +C 3 S 3 +C 4 S 4 And en=e' ×s E-n ”,S E-n The effective evaporation area of the yard of the nth year; c (C) 1 To obtain the evaporation coefficient of the open water surface, 1, C 2 Evaporating phosphogypsum wet surfaceCoefficient of 0.8, C 3 Taking 0.4 of the evaporation coefficient of the phosphogypsum dry surface, C 4 Taking 0 as the evaporation coefficient of the exposed surface of the impermeable membrane; s is S 1 Is the open water area (m 2), S 2 Is phosphogypsum wet surface area (m) 2 )S 3 Is the dry surface area (m) 2 )，S 4 Is the exposed surface area (m) 2 ) The method comprises the steps of carrying out a first treatment on the surface of the En is the evaporation capacity (m) of the phosphogypsum yard of the nth year 3 ) The method comprises the steps of carrying out a first treatment on the surface of the E' is the annual average evaporation capacity (m 2 )。
The moisture content of the dry phosphogypsum is expressed as Rn= (m) Dry basis *W Dry basis )/[(1+W Dry basis )*ρ Liquid and its preparation method ]",: rn is the moisture content (m) of the dry phosphogypsum of the nth year 3 )，m Dry basis The amount (t) of phosphogypsum on a dry basis for the nth year; w (W) Dry basis For the water content (%) of the dry phosphogypsum discharged by the filter press, the mass of pore water in the dry phosphogypsum accounts for the mass of the rest phosphogypsum solid particles, and ρ is the ratio of the pore water to the rest phosphogypsum solid particles Liquid and its preparation method Is the density of pore water (t/m) 3 ) Generally 1t/m 3 . The pore trapped water volume is expressed by the formula "in= (M 0 *W 0 )/[(1+W 0 )*ρ Liquid and its preparation method ]"calculated, in is the saturated initial phosphogypsum pore entrapping water (m 3 )，M 0 Saturated initial phosphogypsum amount (t) for the nth year; w (W) 0 The water content (%) of the saturated initial phosphogypsum is the proportion of the mass of pore water in the saturated initial phosphogypsum to the mass of the rest phosphogypsum solid particles, ρ Liquid and its preparation method Is the density of pore water (t/m) 3 ) Generally 1t/m 3 。
The settlement extrusion water is needed to calculate the layer height of each phosphogypsum layer, calculate the layer height of each layer according to the accumulation volume-elevation function relation (H elevation=f (V accumulation volume)) of the basic data of the storage yard design, and use (p) i,j ) The matrix represents the effective pressure applied to each layer, and the number p of the ith row and the jth column of the matrix i,j Expressed as effective pressure applied to the jth layer in the ith year, according to the layering theory, the meaning of i is equal to or greater than j, and the formula is givenWherein gamma is the weight (KN/m) of saturated phosphogypsum 3 ) ρ is the density of the pore water and g is the gravitational acceleration. Using (e) i,j ) The matrix represents the void ratio of each layer, and the number e of the ith row and the jth column of the matrix i,j Expressed as the j-th layer void ratio in the i-th year. Through phosphogypsum consolidation drainage characteristic research experiments, a phosphogypsum sedimentation model formula characterized by pore ratio change is obtained through research, when i=j, calculation is carried out through the following formula,
when i > j, the calculation is performed by the following formula,
wherein ei, j is the void ratio of the j th layer in the ith year; e0 'is the initial void ratio of the test e 0' 1.132; ei-1, j is the void ratio of the j th layer in the i-1 th year; cc is compression index, dimensionless, 1.21E-01; c alpha is a secondary consolidation coefficient, is dimensionless, and is 3.77E-05; k is a secondary consolidation constant, is dimensionless, and is taken to be-3.37E-03; p0 is the initial effective pressure (load) of saturated initial phosphogypsum, and 1kpa is taken; t0 is the initial duration of extrusion of saturated initial phosphogypsum, and 1s is taken; pi, j and pi-1, j are the effective pressure of the jth layer in the i-th year and the effective pressure of the jth layer in the i-1 th year respectively; ti, j and ti-1, j are respectively the extrusion duration time of the ith layer in the i-th year and the jth layer in the i-1 th year, namely the formation time(s);
wherein formula (VI)-sedimentation caused by primary consolidation, formula ∈ ->Is a sedimentation change induced by secondary consolidation. With (V) i,j ) The matrix represents the volume of each layer, and the number V of the ith row and the jth column of the matrix i,j Expressed as the volume of the jth layer in the ith year, by the formula +.>In the nth year, volume of phosphogypsum of each layer V i,j Superposition, namely the total volume Vn of phosphogypsum pile after the annual sedimentation extrusion water is discharged, has the formula ∈>In V form 0 Representing the volume of saturated initial phosphogypsum entering the storage yard each year, and Vn represents the total volume of phosphogypsum piles after sedimentation extrusion water is discharged in the nth year; if Sn represents the total amount of settled and extruded water generated in phosphogypsum storage yards in the nth year; t (T) n Indicating the total amount of sedimentation extrusion water accumulated in the phosphogypsum storage yard in the nth year; the readily available formula "tn=n×v0-Vn; sn=tn-Tn-1 ".
Example 1 an example of a phosphoric acid production facility in Guizhou province, which produces 80 ten thousand tons of phosphoric acid (P 2 O 5 The annual phosphogypsum (pure phosphogypsum solid particles) is about 400 ten thousand tons, the phosphogypsum is treated in a phosphogypsum yard matched with the phosphogypsum, the phosphogypsum yard matched with the enterprise belongs to a valley phosphogypsum yard, the yard is a wet yard adopting an upstream method to build a dam, and an impermeable membrane is adopted to perform full-warehouse basin impermeable. The elevation of the bottom of the yard is 956 meters, and the final elevation is 1030m. The yard design service life was 6 years.
The example is that the non-hydrological meteorological observation data in the factory of the storage yard is adopted by the example of the hydrological meteorological observation data of a meteorological station in a county with a small distance from the storage yard and a small elevation difference. According to the statistics of the recent ten years data of the county weather station, the average precipitation amount of the area for many years is 1166.1mm; the average evaporation capacity of the area for many years is 628.8mm; firstly, the rainfall and the evaporation are calculated, and the storage yard is designed to be respectively provided with flood intercepting ditches at the elevations of 985.3m and 999.3m, and the corresponding areas at the two elevations are 241702.1m 2 And 458498.86m 2 ，
TABLE 1 calculation of phosphogypsum leachate yield (unit m) 3 )
According to the calculation result of the phosphogypsum storage yard water balance factor and the calculation formula of the phosphogypsum percolate yield, the calculation result is shown in the phosphogypsum percolate yield calculation in table 1; the change condition of the yield Qn of phosphogypsum percolate of the storage yard along with time is shown in the attached figure 1; FIG. 2 is a graph showing the comparison of the actual measurement value and the calculated value of the elevation of the pile; the actual measured value and the calculated value of the elevation speed of phosphogypsum piles in the storage yard are basically consistent, which shows that the percolate capacity calculation model is consistent with the actual situation of the storage yard, but the elevation of the actual piles is slightly higher than the calculated value, because the actual production amount of phosphogypsum is more than the calculated value, and each 1 ton of phosphoric acid product (P is used for the production of 2 O 5 Calculated) yields of phosphogypsum of about 5-6 tons, more than the phosphogypsum yield employed herein (5 tons phosphogypsum per 1 ton phosphoric acid product).
According to the literature and engineering actual data, the application provides a design calculation method of an phosphogypsum storage yard regulation pool for the first time, namely, a maximum monthly leachate yield value determined by a maximum rainfall amount from month to month in 10 years is adopted, and the current month treated water amount is deducted, so that the maximum monthly leachate remaining amount is obtained; the maximum monthly leachate yield of the 6 th year is adopted to deduct the treatment water quantity of the current month, the maximum monthly leachate residual quantity is obtained, the maximum monthly leachate residual quantity is accumulated according to the least adverse condition (namely, the data accumulation of positive months continuously appear in the monthly leachate residual quantity), and finally the calculated pool capacity of the regulating pool is obtained. Taking the phosphogypsum yard determined above as an example, the calculation of the maximum rainfall amount per month, the maximum percolate yield per month determined by the rainfall amount and the catchment area and the maximum percolate remaining amount per month in the 6 th year are shown in the percolate regulating tank volume calculation table in table 2.
TABLE 2 calculation of percolate conditioning tank volume
As shown in fig. 3 and 4, the adjusting backwater pool comprises an adjusting pool 2 and a backwater pool 1, phosphogypsum yard process water flows into the adjusting pool 2 after being clarified by the backwater pool 1, the adjusting pool is provided with a spillway 9, the backwater pool 1 comprises a pool body and a pressing plate 3, the pressing plate 3 is arranged in the pool body and is in sliding connection with the inner wall of the pool body, the pressing plate 3 is welded with a telescopic pipe 4, the telescopic pipe 4 penetrates through the pressing plate 3, a turning plate 5 is arranged below the pool body, the turning plate 5 is in rotating connection with the pool body, a sludge discharge pipe 6 is arranged on the left side wall below the pool body, an electric valve is arranged in the sludge discharge pipe 6, an electric valve switch 61 is arranged on the right side wall below the pool body, the electric valve is closed by pressing the switch 61 by a supporting plate 54, a rotating shaft 55 of the first gear 56 extends into the pool body and is in rotating connection with the turning plate, the upper end of the pressing plate 3 is fixedly connected with a concave rod 31, one end of the concave rod 31 is arranged outside the pool body as shown in fig. 5, and a first rack 32 meshed with the first gear 56 is arranged.
The inner wall of the box body above the left end of the turning plate 5 is fixed with a sealing strip along the horizontal direction, the lower end of the turning plate 5 is provided with a supporting mechanism, the supporting mechanism comprises a supporting block 8, a sliding rod 85, a ratchet wheel 81 and a pawl 82, the supporting block 8 is in sliding connection with the lower end face of the turning plate 5, one end of the sliding rod 85 is in rotating connection with the supporting block 8, the other end of the sliding rod 85 is in spline connection with the ratchet wheel 81, the sliding rod 85 is obliquely arranged right, and the inclination angle is 45-65 degrees; the ratchet 81 is rotationally connected to the bottom of the box body through a rotating rod, the rotating rod of the ratchet 81 is connected with a torsion spring, one end of a pawl 82 is meshed with the ratchet 81, the other end of the pawl 82 is rotationally connected to the bottom of the box body, the upper end of the rod portion of the pawl 82 is fixedly connected with a stay wire 84, the other end of the stay wire 84 is fixedly connected with the rotating shaft 55, and a second spring 83 is fixed between the lower surface of the rod portion of the pawl 82 and the bottom of the box body.
The telescopic pipe 4 adopts a corrugated hose, the telescopic pipe 4 comprises a first telescopic pipe and a second telescopic pipe, the first telescopic pipe and the second telescopic pipe are respectively connected with the water inlet pipe 41 and the water pumping pipe 42 in a threaded mode, one end of the water pumping pipe 42 is located in the adjusting tank 2 and connected with the water pumping pump 7, and a water pump valve 71 is arranged in the water pumping pipe. The water suction pipe 42 is always positioned on the surface of the wastewater in the water return tank 1, so that the supernatant after precipitation in the water return tank 1 can be conveniently and rapidly pumped, and impurities such as phosphogypsum entering the regulating tank 2 are reduced. A filter screen 43 is connected with the inlet of the second telescopic pipe 4 below the pressing plate 3 through bolts. The filter screen 43 is used for carrying out preliminary filtration on impurities such as phosphogypsum and the like, and the structure is simple and the installation is convenient.
When water enters the pond, the pressure plate 3 rises along with the rising of the water level, the telescopic pipe 4 is compressed along with the position change of the pressure plate 3, phosphogypsum process water enters the water return pond 1 through the telescopic pipe 4, and as the telescopic pipe 4 always contacts the water surface to play a role in drainage, turbulence generated by the entering water flow in the water return pond 1 is small, so that impurities such as phosphogypsum and the like contained in the process water can be quickly precipitated; when the water flow in the water return tank 1 is reduced, the pressure plate 3 gradually descends, the concave rod 31 descends along with the pressure plate 3, when the concave rod 31 descends to the point that the first gear 56 is meshed with the first rack, the concave rod 31 drives the first gear 56 to rotate, the first gear 56 rotates to enable the rotating shaft to roll the stay wire 84, so that the pawl 82 is pulled to be separated from the ratchet wheel 81, the ratchet wheel 81 is not limited any more, the slide rod 85 can rotate, and the supporting block 8 can slide rightwards; when the turning plate 5 rotates downwards under the action of the gravity of the waste material deposited above the turning plate, the supporting block 8 slides rightwards relatively, the supporting plate 54 does not squeeze the electric valve switch 61 any more after the turning plate 5 rotates, so that the electric valve is opened, and phosphogypsum impurity sludge on the turning plate 5 is discharged through the sludge discharging port rapidly when the turning plate 5 rotates.
Then the ratchet 81 returns under the action of the torsion spring, so that the turning plate 5 is pushed to return through the supporting block 8, the rotating shaft 55 rotates reversely when the turning plate 5 returns, the stay wire 84 is loosened, the pawl 82 returns under the action of the elastic force of the second spring 83 to be meshed with the ratchet 81, the ratchet 81 is limited in rotation, the supporting block 8 is prevented from sliding, and accordingly the bottom of the turning plate is supported.
The quick sedimentation of waste materials in the water return tank 1 is realized, the production water return efficiency is improved, the periodic waste material cleaning can be automatically carried out when the water quantity in the water return tank 1 is small, the manual cleaning is not needed, and the manual cleaning cost is reduced.
The same parts of embodiment 2 and embodiment 1 are not repeated, one end of the turning plate 5 far away from the sludge discharge pipe 6 is fixedly connected with a supporting plate 54 along the vertical direction, the upper surface of the turning plate 5 is slidably connected with a sliding block 51, a first spring 53 is fixedly connected between the sliding block 51 and the supporting plate 54, the upper end of the sliding block 51 is fixedly connected with a baffle plate 52, the baffle plate 52 is obliquely arranged, and one end of the baffle plate 52 is contacted with the inner wall of the tank body. When the turning plate 5 is inclined, the sliding block 51 slides along the turning plate 5 under the action of gravity, so that sundries remained on the turning plate 5 are removed, the settled waste at the bottom of the water return tank 1 can be removed automatically at regular intervals, manual regular cleaning is not needed, and the production and operation cost is effectively reduced; when the waste in the water return tank 1 falls on the baffle plate 52, the waste can slide onto the turning plate 5 through the inclined surface of the baffle plate 52, and meanwhile, the baffle plate 52 can prevent the large-volume waste from falling down to squeeze the first spring 53.
The foregoing is merely exemplary embodiments of the present application, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present application, and these should also be considered as the scope of the present application, which does not affect the effect of the implementation of the present application and the utility of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (6)
1. A phosphogypsum regulation backwater pool design method is characterized in that: the regulating backwater pool comprises a regulating pool and a backwater pool, phosphogypsum storage yard process water flows into the regulating pool after being clarified by the backwater pool, percolate yield influence parameters comprise rainfall Pn, dry phosphogypsum water content Rn, sedimentation extrusion water amount Sn, evaporation amount En and pore interception water In, the calculation model of percolate productivity Qn is Qn=Rn+Pn+Sn-En+In, the rainfall Pn only comprises rainfall In the flood interception ditch range, and the formula 'Pn=P' is used for S P-n "calculate, pn is the precipitation (m) of phosphogypsum into the yard in the nth year 3 ) The method comprises the steps of carrying out a first treatment on the surface of the P' is annual average precipitation (m) 2 )；S P-n Is the catchment area (m) in the flood cut ditch of the nth yard 2 ) The method comprises the steps of carrying out a first treatment on the surface of the The evaporation capacity of the storage yard is according to the formula S E-n ＝C 1 S 1 +C 2 S 2 +C 3 S 3 +C 4 S 4 And E n =e' ×s E-n Calculation, S E-n The effective evaporation area of the yard of the nth year; c (C) 1 For the evaporation coefficient of open water, C 2 Is the evaporation coefficient of the wet surface of phosphogypsum, C 3 Is the evaporation coefficient of phosphogypsum dry surface, C 4 The evaporation coefficient of the exposed surface of the impermeable membrane; s is S 1 Is the open water surface area (m) 2 )，S 2 Is phosphogypsum wet surface area (m) 2 )S 3 Is the dry surface area (m) 2 )，S 4 Is the exposed surface area (m) 2 ) The method comprises the steps of carrying out a first treatment on the surface of the En is the evaporation capacity (m) of the phosphogypsum yard of the nth year 3 ) The method comprises the steps of carrying out a first treatment on the surface of the E' is the annual average evaporation capacity (m 2 )；
The moisture content Rn of the dry phosphogypsum is expressed by a formula Rn= (m) Dry basis *W Dry basis )/[(1+W Dry basis )*ρ Liquid and its preparation method ]Calculated as Rn is the moisture content (m 3 )，m Dry basis The amount (t) of phosphogypsum on a dry basis for the nth year; w (W) Dry basis For the water content (%) of the dry phosphogypsum discharged by the filter press, the mass of pore water in the dry phosphogypsum accounts for the mass of the rest phosphogypsum solid particles, and ρ is the ratio of the pore water to the rest phosphogypsum solid particles Liquid and its preparation method Is the density of pore water (t/m) 3 ) The pore trapping water volume is expressed by the formula "in= (M 0 *W 0 )/[(1+W 0 )*ρ Liquid and its preparation method ]"calculated, in is the saturated initial phosphogypsum pore entrapping water (m 3 )，M 0 Saturated initial phosphogypsum amount (t) for the nth year; w (W) 0 The water content (%) of the saturated initial phosphogypsum is the proportion of the mass of pore water in the saturated initial phosphogypsum to the mass of the rest phosphogypsum solid particles, ρ Liquid and its preparation method Is the density of pore water (t/m) 3 )；
Sedimentation extrusion water amount Sn, using formula sn=tn-Tn-1; tn represents the total amount of sediment and extrusion water accumulated in the phosphogypsum yard of the nth year;
adjusting the design of the water return tank comprises the following steps;
step S1: according to the service life of phosphogypsum storage yard operation and the annual design of pile volume, determining the year of the maximum yield of percolate;
step S2: obtaining the value of the percolate yield influence parameter of the year according to the year of the maximum yield of the percolate obtained in the step 1, and calculating the average value of all the parameters;
step S3: determining the maximum output of the leachate in the month according to the maximum rainfall of the phosphogypsum yard in the place of the phosphogypsum yard for about 10 years;
step S4: subtracting the current month treated water amount from the maximum percolate yield to obtain the maximum month percolate residual quantity, and accumulating data of months with positive values continuously appearing in the month percolate residual quantity to obtain the total calculated pool capacity of the regulating water return pool;
step S5: and carrying out construction of the regulating backwater pool according to the pool volume of backwater of the regulating pool.
2. The phosphogypsum regulating water return tank design method as set forth in claim 1, wherein: the backwater pond includes cell body and clamp plate, and the clamp plate setting is in the cell body and with cell body inner wall sliding connection, clamp plate fixedly connected with flexible pipe, flexible pipe runs through the clamp plate, and cell body bottom rotates to be connected with turns over the board, turns over the board and keeps away from the one end of row's silt pipe along vertical direction fixedly connected with backup pad, and the lateral wall that the pivot was kept away from to cell body bottom is equipped with row's silt pipe, is equipped with the motorised valve in the electricity row's silt pipe, and cell body below right side wall is equipped with the motorised valve switch, and backup pad push switch makes the motorised valve close, and the outside rotation of cell body is connected with first gear, and the pivot of first gear extends to cell body inside, clamp plate upper end fixedly connected with indent push rod, push rod one end be equipped with first gear engagement's second gear and be located the cell body outside, turn over the board lower extreme and be equipped with supporting mechanism, pivot one end and supporting mechanism fixed connection.
3. The phosphogypsum regulating water return tank design method as set forth in claim 2, wherein: the telescopic pipe comprises a first telescopic pipe and a second telescopic pipe, the first telescopic pipe and the second telescopic pipe are respectively connected with a water inlet pipe and a water pumping pipe, and one end of the water pumping pipe is positioned in the regulating tank and connected with a water pumping pump.
4. The phosphogypsum regulating water return tank design method as set forth in claim 2, wherein: and a filter screen is detachably connected to the inlet of the second telescopic pipe below the pressing plate.
5. The phosphogypsum regulating water return tank design method as set forth in claim 2, wherein: the upper surface sliding connection of turning over the board has the ejector pad, fixedly connected with first spring between ejector pad and the backup pad, ejector pad upper end fixedly connected with baffle, baffle slope setting, baffle one end and cell body inner wall contact.
6. The phosphogypsum regulating water return tank design method as set forth in claim 2, wherein: the supporting mechanism comprises a supporting block, a sliding rod, a ratchet wheel and a pawl, wherein the supporting block is in sliding connection with the lower end face of the turning plate, one end of the sliding rod is in rotational connection with the supporting block, and the other end of the sliding rod is in spline connection with the ratchet wheel; the ratchet wheel rotates to be connected in the bottom of the box, pawl one end and ratchet meshing, the other end rotates with the bottom of the box to be connected, and the pole portion fixedly connected with of pawl is acted as go-between, and the other end and the pivot fixed connection of acting as go-between are fixed with the second spring between the pole lower surface of pawl and the bottom of the box.
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| WO2004038343A1 (en) * | 2002-10-25 | 2004-05-06 | Waste Water Control Aps | Determining a flow in a wastewater system |
| CN102182241A (en) * | 2011-02-01 | 2011-09-14 | 深圳市胜义环保有限公司 | Rain and sewage diversion system for phosphogypsum yard |
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