CN203728594U - Production device of calcium sulphate dihydrate - Google Patents
Production device of calcium sulphate dihydrate Download PDFInfo
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- CN203728594U CN203728594U CN201320836031.1U CN201320836031U CN203728594U CN 203728594 U CN203728594 U CN 203728594U CN 201320836031 U CN201320836031 U CN 201320836031U CN 203728594 U CN203728594 U CN 203728594U
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Abstract
The utility model relates to a production device of calcium sulphate dihydrate. The production device comprises a mixed acid pond, an alkali liquor pond, a neutralizing tank, an acid liquor pump and an alkali liquor pump, wherein the neutralizing tank is provided with an acid liquor guide groove and an alkali liquor guide groove which are arranged in a staggered manner; more than two shower pipes vertically penetrating into the pond are regularly distributed at the bottoms of the acid liquor guide groove and the alkali liquor guide groove, and more than two spray holes are formed in the periphery of the shower pipes from top to bottom; stirring propellers which are further arranged in two rows are arranged between the acid liquor and alkali liquor shower pipes; a liquid outlet is formed on the lower part of the rear section of the neutralizing tank, and the liquid outlet is communicated with a subsequent settling pond. The device provided by the utility model can control the neutralizing condition of liquid phase acid and base, so that tabular crystals beneficial for subsequent filtration are generated and the crystals grow in tabular form, thereby providing the tabular crystals which can effectively reduce the moisture content after filtration for subsequent filtration. Therefore, the production device not only can improve the filter efficiency and lower the drying cost, but also further lower the transportation cost, improve the transportation efficiency and powerfully promote recycle of renewable resources.
Description
Technical field
The present invention relates to circulation recovery method and the equipment of industrial waste sulfuric acid liquid, more particularly, the invention particularly relates to the method and apparatus that loops back the industry Waste Sulfuric Acid liquid of knocking off in a kind of employing with crystallization processes.
Background technology
Some manufacturing enterprises can discharge the waste liquid that contains higher concentration sulfuric acid and low concentration hydrochloric acid and metal ion.Produce the similar process of waste residue with the spent acid of processing phosphoric acid factory, industrial waste sulfuric acid liquid, through neutralizing treatment, is also produced a large amount of calcium sulfate (gypsum) waste residue.Along with the state basic policy of Sustainable development is deeply carried out by country; the great attention that environmental consciousness causes in numerous citizens; about the problems such as the cycling and reutilization of environment protection, resource recovery and industrial waste product waste material have obtained comprehensive attention and have extensively launched, in this respect a lot of achievements for the production of and obtained good economic benefit and environmental benefit.Comprising also more and more extensive to the exploitation of terra alba (gypsum), for example phosphogypsum, fluorgypsum, the resource recovery products such as desulfurated plaster have been broken away from the mode of landfill, start to be reused.Comparatively simple and convenient and demand is large is as the retardant in cement in these gypsum recycling methods.
Similar with phosphoric acid factory by-product gypsum waste residue, the traditional neutralizing treatment gained gypsum of industrial waste sulfuric acid liquid is substantially all with moisture, and water-content can be up to 40%, and crystal is less, is unfavorable for drying.Because by-product value is lower, moisture content before dispatching from the factory is high causes the problem that gypsum purity is low, transportation cost is high, in the situation that not having low cost waste heat to carry out drying and processing, the problems referred to above directly have influence on the Efficient Cycle recycling of renewable resource, are also difficult to solve problem of environmental pollution.
Summary of the invention
For the above-mentioned shortcoming of prior art, the object of the invention is to provide a kind of production method and production equipment thereof of terra alba, its tool has the following advantages: by control liquid phase soda acid neutrality condition, make to generate and be more conducive to the tabular crystal of follow-up filtration and keep crystal to grow up with sheet form, thereby for follow-up filtration provides the platelet that can effectively reduce the rear water ratio of filter, can improve filtration efficiency, reduce and dry cost, can also further reduce transportation cost, improve conveying efficiency, promote effectively the cycling and reutilization of renewable resource.
For this reason, one of technical solution of the present invention is a kind of production method of terra alba, it mixes the acid solution containing Waste Sulfuric Acid with the alkali lye containing calcium hydroxide, generate terra alba by neutralization reaction, and described acid solution and alkali lye all add neutralization tank, in carrying out under the abundant stirring of revolving oar and crystallization, sulfuric acid concentration in the acid solution that control adds, and in the alkali lye adding the concentration of calcium hydroxide all in 0.05-0.4mol/L scope, simultaneously, the pH value of controlling mixing liquid in neutralization tank is neutral, and in control neutralization tank mixing liquid stay the pond time at 20 minutes--2 hours, in and crystallization after mixing liquid, by the set liquid outlet in the bottom of neutralization tank back segment, output do filter dewater.
The inventor recognizes uniquely: controls the neutrality condition of liquid phase soda acid, can effectively control shape and the size of crystal in gypsum crystallization process, and then the water ratio of gypsum after can controlled filter; If can obtain large size gypsum wafer, gypsum is just easy to filter and dewaters, can make the attached water content after filtering remain on lower level, thereby be expected to significantly reduce the cost of transport, the cost of reduction industrial waste sulfuric acid liquid treatment, effectively reduce environmental pollution.Therefore, the production method of terra alba of the present invention, comprise that controlling in the alkali lye that adds sulfuric acid concentration in the acid solution of neutralization tank and add that the concentration of calcium hydroxide is all in suitable low value scope and keeps mixing liquid pH value in neutralization tank is neutral situation, in enforcement and crystallization reaction, in addition adopt and revolve fully stirring of oar enforcement, and adopt the damp type liquid outlet control of the bottom of neutralization tank back segment to go out flow velocity, mixing liquid is stopped 20 minutes in pond--2 hours, allow and generate crystal and can accept comfortably to revolve the crystal grain constantly producing in the mixing liquid that oar stirs, to generate the tabular crystal that is more conducive to follow-up filtration, and keep crystal to continue to grow up with sheet form, thereby for follow-up filtering separation provides the platelet material that can effectively reduce the rear water ratio of filter, in a word, the inventive method can provide the platelet that can effectively reduce the rear water ratio of filter for follow-up filtration, can improve filtration efficiency, reduce and dry cost, can also further reduce transportation cost, improve conveying efficiency, thereby promote effectively the cycling and reutilization of renewable resource.
For water ratio after the further filter that improves crystal sheet rate, minimizing platelet material, terra alba production method of the present invention comprises following processing condition improvement:
Control enters the real-time concentration of calcium hydroxide in the real-time concentration of sulfuric acid in the acid solution of neutralization tank and alkali lye all in 0.15-0.3mol/L scope.
For further regulating and controlling concentration homogeneity, the increase platelet content of mixing liquid in neutralization tank, terra alba production method of the present invention comprises following processing condition improvement:
The horizontal flow velocity that described in described production method control, in neutralization tank, mixing liquid flows to described liquid outlet is 0.05-0.5m/s.
Described in described production method control, the mixing liquid at back segment place is also partly back to the leading portion of neutralization tank, and this quantity of reflux is the 1-30% of feed liquor total amount.
Correspondingly, the production equipment that the production method that another technical solution of the present invention is a kind of terra alba described above adopts, it comprise nitration mixture pond, the housing hydrogen calcium oxide solution of holding described acid solution alkali lye pond, in and the neutralization tank used of crystallization, the outlet of nitration mixture pond is connected with acid pump from acid solution to neutralization tank that carry, the outlet of alkali lye pond is connected with lye pump from alkali lye to neutralization tank that carry, and:
Described neutralization tank leading portion top bilateral is provided with staggered acid solution diversion trench, alkali lye diversion trench, described acid pump, alkali lye pump outlet are communicated with respectively diversion trench separately, be distributed with 2 and vertically go deep into the shower in pond above in acid solution diversion trench, alkali lye diversion trench bottom rule, shower periphery offers more than 2 spray apertures from top to bottom; Between acid solution and alkali lye shower, also bilateral is arranged and is provided with the oar that revolves that stirs use; The bottom of neutralization tank back segment is provided with liquid outlet, and this liquid outlet is communicated with follow-up settling tank;
Described production equipment also comprises surveys the pH instrument P1 of potential of hydrogen in described neutralization tank, frequency converter A 1, the treater of control lye pump; The output terminal of this pH instrument P1 connects the respective input of treater, and the corresponding output end of described treater connects the controlled end of this frequency converter A 1, and the control end of frequency converter A 1 connects the power source circuit of described lye pump.
(described in the application, device the corresponding interface or corresponding port are to represent: this device has more than 2 multiple interfaces or port; And certain interface or the port of this device being connected with certain functional circuit are the corresponding interface or the corresponding port of this device corresponding with this functional circuit.）
The production equipment of terra alba of the present invention, adopt the automatic control loop of surveying the pH instrument P1 of potential of hydrogen in neutralization tank, the frequency converter A 1 of controlling lye pump, treater three formation, thereby to be all in suitable low value scope and to keep mixing liquid pH value in neutralization tank be neutral situation to the concentration of calcium hydroxide in the alkali lye of effectively controlling sulfuric acid concentration in the acid solution that adds neutralization tank and add, in enforcement and crystallization reaction.In addition adopt acid solution diversion trench, alkali lye diversion trench and diversion trench bottom shower, stir and revolve oar and obtain and fully mix, damp type liquid outlet structure control with the bottom of neutralization tank back segment goes out flow velocity, make mixing liquid in pond, stop enough time, allow and generate crystal and can accept comfortably to revolve the crystal grain constantly producing in the mixing liquid that oar stirs, more be conducive to the tabular crystal of follow-up filtration and keep crystal to continue to grow up with sheet form to generate, thereby can effectively reduce for follow-up filtering separation provides the platelet material of filtering rear water ratio; Therefore, apparatus of the present invention can provide the platelet that can effectively reduce the rear water ratio of filter for follow-up filtration, can improve filtration efficiency, reduce and dry cost, can also further reduce transportation cost, improve conveying efficiency, thereby promote effectively the cycling and reutilization of renewable resource, effectively reduce environmental pollution.
For the further real-time concentration of effectively controlling in advance the acid solution alkali lye that enters neutralization tank, water ratio after the filter of raising crystal sheet rate, minimizing platelet material, the utility model terra alba production equipment comprises following texture improvement:
Described production equipment also comprises surveys the pH instrument P2 of potential of hydrogen in described nitration mixture pond, the frequency converter A 2 of control acid pump; This pH instrument P2 output terminal connects the respective input of described treater, and the corresponding output end of treater connects the controlled end of described frequency converter A 2, and the control end of frequency converter A 2 connects the power source circuit of described acid pump.
For further controlling the degree of uniformity of the acid solution alkali lye that enters neutralization tank, water ratio after the filter of raising crystal sheet rate, minimizing platelet material, the utility model terra alba production equipment comprises following texture improvement:
Described production equipment also comprise be connected to neutralization tank back segment to its leading portion carry mixing liquid reflux pump, be connected to flow sensor in described acid pump delivery conduit, control the frequency converter A 3 of reflux pump; The output terminal of flow sensor connects the respective input of described treater, and the controlled end of this frequency converter A 3 connects described treater corresponding output end, and the control end of this frequency converter A 3 connects the power source circuit of reflux pump.
Described treater comprises programmable logic controller PLC.
For further improving automatism, continuity and the globality of the precipitate and separate of neutralization tank, settling tank, improve precipitate and separate efficiency, the utility model terra alba production equipment comprises following texture improvement:
Described production equipment also comprises that suction port gos deep into the shurry pump in described settling tank, the frequency converter A 4 of controlling this shurry pump, pressure filter, is located at the pressure transmitter on pressure filter; Shurry pump outlet connects this pressure filter entrance, and the pressure transmitter output terminal of pressure filter connects described treater respective input, and the controlled end of this frequency converter A 4 connects described treater corresponding output end, the power source circuit of the control end binder stock pump of this frequency converter A 4.
For further improving the damping structure reasonableness between neutralization tank, settling tank, water ratio after the filter of raising crystal sheet rate, minimizing platelet material, the utility model terra alba production equipment comprises following texture improvement:
The water sectional area of crossing of described neutralization tank back segment liquid outlet is not more than 10% of its place facade area, and liquid outlet position is no more than 15% of its place elevation.
Production equipment also comprise be connected to entrance upstream, described nitration mixture pond acid solution Buffer Pool, be connected to the filtrate storage pool after the overflow port of described settling tank back segment.
The top in described settling tank downstream is provided with overflow port, and this overflow port is communicated with follow-up filtrate storage pool.
Trial production shows: the production equipment of the utility model terra alba, and can make the water ratio of terra alba by original more than 40% dropping to below 20%, the oven dry cost of product per ton can reduce by 20 yuan, saves product cost more than 30%.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
brief description of the drawings
Fig. 1 is that the master of the utility model terra alba production equipment example structure looks schematic diagram.
Fig. 2 is the plan structure schematic diagram of Fig. 1 embodiment neutralization tank.
embodiment
As Fig. 1-2, shown in be respectively the structural representation of the production equipment embodiment different visual angles of the utility model terra alba.Production equipment embodiment comprise hold the nitration mixture pond 11 of described acid solution, the acid solution Buffer Pool 10 that is connected to 11 entrance upstreams, described nitration mixture pond, preparation aqua calcis the alkali lye pond 21 of joining alkali pond 20, housing hydrogen calcium oxide solution, in and the neutralization tank 30 used of crystallization, 11 outlets of nitration mixture pond are connected with acid pump 12 from acid solution to neutralization tank 30 that carry, 21 outlets of alkali lye pond are connected with lye pump 22 from alkali lye to neutralization tank 30 that carry, and:
Described neutralization tank 30 leading portion top bilaterals are provided with staggered acid solution diversion trench 13, alkali lye diversion trench 23, the outlet of described acid pump 12, lye pump 22 is communicated with respectively diversion trench 13,23 separately, be distributed with 2 in acid solution diversion trench 13, alkali lye diversion trench 23 bottom rules and vertically go deep into the shower 14,24 in pond above, shower 14,24 peripheries offer more than 2 spray apertures (not being shown in detail) from top to bottom; Between acid solution and alkali lye shower 14,24 also bilateral arrange that ground is provided with stirring use revolve oar 31; The bottom of neutralization tank 30 back segments is provided with liquid outlet 32, and this liquid outlet 32 is communicated with follow-up settling tank 40; After the overflow port 44 of described settling tank 40 back segments, be connected with filtrate storage pool 50.The water sectional area of crossing of described neutralization tank 30 back segment liquid outlets 32 is not more than 10% of its place facade area, and liquid outlet 32 positions are no more than 15% (in pond, arrow express liquid flows to) of its place elevation.
Described production equipment also comprises surveys the pH instrument P1 of potential of hydrogen in described neutralization tank 30, the frequency converter A 1 of controlling lye pump 22, the treater 33 of PLC type; The output terminal of this pH instrument P1 connects the respective input of treater 33, and the corresponding output end of described treater 33 connects the controlled end of this frequency converter A 1, and the control end of frequency converter A 1 connects the power source circuit (do not give and illustrating) of described lye pump 22.
Described production equipment also comprises surveys the pH instrument P2 of potential of hydrogen in described nitration mixture pond, the frequency converter A 2 of control acid pump 12; This pH instrument P2 output terminal connects the respective input of described treater 33, and the corresponding output end of treater 33 connects the controlled end of described frequency converter A 2, and the control end of frequency converter A 2 connects the power source circuit (do not give and illustrating) of described acid pump 12.
Described production equipment also comprise be connected to neutralization tank 30 back segments to its leading portion carry mixing liquid reflux pump 34, be connected to flow sensor 15 in described acid pump 12 delivery conduits, control the frequency converter A 3 of reflux pump 34; The output terminal of flow sensor 15 connects the respective input of described treater 33, and the controlled end of this frequency converter A 3 connects described treater 33 corresponding output end, and the control end of this frequency converter A 3 connects the power source circuit (do not give and illustrating) of reflux pump 34.
Described production equipment also comprises that suction port gos deep into the shurry pump 41 in described settling tank 40, the frequency converter A 4 of controlling this shurry pump 41, pressure filter 42, is located at the pressure transmitter 43 on pressure filter 42; Shurry pump 41 outlets connect these pressure filter 42 entrances, pressure transmitter 43 output terminals of pressure filter 42 connect described treater 33 respective inputs, the controlled end of this frequency converter A 4 connects described treater 33 corresponding output end, the power source circuit (do not give and illustrating) of the control end binder stock pump 41 of this frequency converter A 4.
Claims (10)
1. the production equipment of a terra alba, it comprise hold containing the alkali lye pond of the nitration mixture pond of the acid solution of Waste Sulfuric Acid, preparation aqua calcis, in and the neutralization tank used of crystallization, the outlet of nitration mixture pond is connected with acid pump from acid solution to neutralization tank that carry, the outlet of alkali lye pond is connected with lye pump from alkali lye to neutralization tank that carry, it is characterized in that:
Described neutralization tank leading portion top bilateral is provided with staggered acid solution diversion trench, alkali lye diversion trench, described acid pump, alkali lye pump outlet are communicated with respectively diversion trench separately, be distributed with 2 and vertically go deep into the shower in pond above in acid solution diversion trench, alkali lye diversion trench bottom rule, shower periphery offers more than 2 spray apertures from top to bottom; Between acid solution and alkali lye shower, also bilateral is arranged and is provided with the oar that revolves that stirs use; The bottom of neutralization tank back segment is provided with liquid outlet, and this liquid outlet is communicated with follow-up settling tank;
Described production equipment also comprises surveys the pH instrument P1 of potential of hydrogen in described neutralization tank, frequency converter A 1, the treater of control lye pump; The output terminal of this pH instrument P1 connects the respective input of treater, and the corresponding output end of described treater connects the controlled end of this frequency converter A 1, and the control end of frequency converter A 1 connects the power source circuit of described lye pump.
2. the production equipment of terra alba as claimed in claim 1, is characterized in that: described production equipment also comprise survey potential of hydrogen in described nitration mixture pond pH instrument P2, control the frequency converter A 2 of acid pump; The output terminal of this pH instrument P2 connects the respective input of described treater, and the corresponding output end of treater connects the controlled end of described frequency converter A 2, and the control end of frequency converter A 2 connects the power source circuit of described acid pump.
3. the production equipment of terra alba as claimed in claim 2, is characterized in that: described production equipment also comprises the flow sensor being connected in described acid pump delivery conduit; The output terminal of this flow sensor connects the respective input of described treater.
4. the production equipment of terra alba as claimed in claim 1, is characterized in that: described production equipment also comprise be connected to neutralization tank back segment to its leading portion carry mixing liquid reflux pump, control the frequency converter A 3 of reflux pump; The controlled end of this frequency converter A 3 connects described treater corresponding output end, and the control end of this frequency converter A 3 connects the power source circuit of reflux pump.
5. the production equipment of terra alba as claimed in claim 1, is characterized in that: described production equipment also comprises that suction port gos deep into the shurry pump in described settling tank, the frequency converter A 4 of controlling this shurry pump, pressure filter, is located at the pressure transmitter on pressure filter; Shurry pump outlet connects this pressure filter entrance, and the pressure transmitter output terminal of pressure filter connects described treater respective input, and the controlled end of this frequency converter A 4 connects described treater corresponding output end, the power source circuit of the control end binder stock pump of this frequency converter A 4.
6. the production equipment of terra alba as claimed in claim 1, is characterized in that: the water sectional area of crossing of described neutralization tank back segment liquid outlet is not more than 10% of its place facade area.
7. the production equipment of terra alba as claimed in claim 1, is characterized in that: described liquid outlet position is no more than 15% of its place elevation.
8. the production equipment of terra alba as claimed in claim 1, is characterized in that: the top in described settling tank downstream is provided with overflow port, this overflow port is communicated with follow-up filtrate storage pool.
9. the production equipment of terra alba as claimed in claim 1, is characterized in that: described production equipment also comprises the acid solution Buffer Pool that is connected to entrance upstream, described nitration mixture pond.
10. the production equipment of terra alba as claimed in claim 1, is characterized in that: described treater comprises programmable logic controller PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836031.1U CN203728594U (en) | 2013-12-16 | 2013-12-16 | Production device of calcium sulphate dihydrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836031.1U CN203728594U (en) | 2013-12-16 | 2013-12-16 | Production device of calcium sulphate dihydrate |
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| Publication Number | Publication Date |
|---|---|
| CN203728594U true CN203728594U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320836031.1U Withdrawn - After Issue CN203728594U (en) | 2013-12-16 | 2013-12-16 | Production device of calcium sulphate dihydrate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693670A (en) * | 2013-12-16 | 2014-04-02 | 乳源瑶族自治县东阳光化成箔有限公司 | Production method of calcium sulphate dehydrate and production device thereof |
-
2013
- 2013-12-16 CN CN201320836031.1U patent/CN203728594U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693670A (en) * | 2013-12-16 | 2014-04-02 | 乳源瑶族自治县东阳光化成箔有限公司 | Production method of calcium sulphate dehydrate and production device thereof |
| CN103693670B (en) * | 2013-12-16 | 2015-07-22 | 乳源瑶族自治县东阳光化成箔有限公司 | Production method of calcium sulphate dehydrate and production device thereof |
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Granted publication date: 20140723 Effective date of abandoning: 20150722 |
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