CN202705176U - Treatment equipment for high-concentration magnesium salt wastewater - Google Patents
Treatment equipment for high-concentration magnesium salt wastewater Download PDFInfo
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- CN202705176U CN202705176U CN 201220359371 CN201220359371U CN202705176U CN 202705176 U CN202705176 U CN 202705176U CN 201220359371 CN201220359371 CN 201220359371 CN 201220359371 U CN201220359371 U CN 201220359371U CN 202705176 U CN202705176 U CN 202705176U
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Abstract
The utility model discloses treatment equipment for high-concentration magnesium salt wastewater and belongs to the technical field of wastewater treatment equipment. The high-concentration magnesium salt wastewater treatment equipment comprises an ammoniation tower, wherein the bottom of the ammoniation tower is connected with the top of a magnesium hydroxide thickener; the bottom of the magnesium hydroxide thickener is connected with a magnesium hydroxide filter; the top of the magnesium hydroxide filter is connected with a magnesium hydroxide dryer, and the bottom of the magnesium hydroxide filter is connected with the top of a carbonizing tower through a mother liquor pump; the bottom of the carbonizing tower is connected with a basic magnesium carbonate thickener; the bottom of the basic magnesium carbonate thickener is connected with a basic magnesium carbonate filter; and the top of the basic magnesium carbonate filter is connected with a basic magnesium carbonate dryer, and the bottom of the basic magnesium carbonate filter is connected with a multi-effect evaporator group. The high-concentration magnesium salt wastewater treatment equipment is simple in structure, convenient to operate, low in cost and good in economic benefits, a continuous large wastewater treatment device can be provided, and the problem that high-concentration magnesium salt wastewater produced by a Grignard reaction cannot be treated, which bothers various manufacturing enterprises, is completely solved.
Description
Technical field
The utility model belongs to the sewage treatment equipment technical field, is specifically related to a kind for the treatment of facility of high density magnesium salts waste water of the high density magnesium salts waste water for the treatment of producing such as grignard reaction.
Background technology
At present, how high density magnesium salts waste water is effectively processed, it is the scientific worker's of the domestic and international many scientific researches of puzzlement, design, production unit a difficult problem always, according to investigation and related documents report, for different salt concentrations contain magnesium salts waste water, its desalination process mainly contains following several mode:
1) the distillation method distillation method is ancient, the most the most frequently used a kind of desalting method.Distillation method is exactly that the brackish water heating is made it explosive evaporatoin, vapor condensation is become the process of fresh water again.Its advantage is that simple in structure, processing ease, gained fresh water water quality are good etc.But evaporation concentration desalination process itself need to consume a large amount of steam, and in the more and more higher situation of current energy shortage, energy cost, the distillation method investment is large, and working cost is high, and is difficult to reach the decontamination effect improving of expection;
2) this method of dilution method adopts and adds water and dilute, and makes the waste water salinity be lower than malicious thresholding, and biological treatment just can not be suppressed.The method is simple, easy handling and management; Its shortcoming is exactly waste water not to be carried out any effective processing, and the salts substances total amount in the waste water is without any minimizing, and has increased treatment scale, has increased initial cost, has increased working cost, waste water resource.
3) chemical transformation precipitates some salts substances in the waste water, and is separated by adding suitable industrial chemicals, thereby reduces salt concn in the waste water, reaches the wastewater treatment purpose.But do not have suitable industrial chemicals for containing high magnesium salts waste water at present, and the method introduces other ion, it is further processed, cause other pollutions.
4) the reverse osmosis membrane separation technology is by selecting suitable reverse osmosis membrane, select to see through the membrane separation technique of (half sees through) property film by it, when added pressure in the system during greater than water inlet solution osmotic pressure, water molecules constantly sees through film, flow into pipe core through producing water flow passage, then at one end flow out the impurity in the water, it is trapped in the influent side of film, then flow out in dense water water side, thereby reach the isolation of purified purpose.
Used equipment exists that scale is large, energy expenditure is large, cost is high in the above-mentioned magnesium salts wastewater treatment, and separating effect is not good, and the large defective of follow-up solid waste intractability can't satisfy the demand that the three wastes are processed the aspects such as innoxious, resource utilization and minimizing.
The utility model content
For the above-mentioned problems in the prior art, for the real environmental disposal problem that solves high density magnesium salts waste water, realize discharging zero and pollute, and reduce energy consumption, improve value-added content of product, the purpose of this utility model is to provide the treatment facility of high density magnesium salts waste water.
Of the present utility model being contemplated that: when solving environmental issue, obtain magnesium ion valuable in the magnesium salts with lowest energy consumption, and do not cause secondary pollution, utility model people to adopt chemical conversion distillation method technology that high density magnesium salts waste water is carried out recycling treatment.
The treatment facility of described high density magnesium salts waste water, it is characterized in that comprising ammonifying tower, the ammonifying tower bottom connects the top of magnesium hydroxide thickener, magnesium hydroxide thickener bottom is connected with the magnesium hydroxide filter, magnesium hydroxide filter top is connected with the magnesium hydroxide drying machine, the bottom is connected with the carbonating tower top by the mother liquor pump, the carbonating tower bottom is connected with the magnesium basic carbonate thickener, magnesium basic carbonate thickener bottom is connected with the magnesium basic carbonate filter, magnesium basic carbonate filter top is connected with the magnesium basic carbonate drying machine, and the bottom is connected with the multiple-effect evaporator group.
The treatment facility of described high density magnesium salts waste water is characterized in that the ammonifying tower bottom is connected with the ammonia storage tank of carrying ammonia, arranges the valve I between described ammonia storage tank and the ammonifying tower.
The treatment facility of described high density magnesium salts waste water is characterized in that the carbonating tower bottom is connected with the ammonia storage tank of carrying ammonia, the carbon dioxide storage tank of transport of carbon dioxide respectively, arranges the valve II between described ammonia storage tank and the carbonating tower.
With the treatment process of this device processes high density magnesium salts waste water, it is characterized in that described technique is: magnesium salts waste water is dropped in the reactor, pass into ammonia and carbonic acid gas, adopt ammonia carbon method to process, it is fertile to obtain magnesium hydroxide, magnesium basic carbonate and ammonium.
The treatment process of described high density magnesium salts waste water is characterized in that described technique specifically comprises the steps:
1) magnesium salts waste water is added in the ammonifying tower from the top, carry out aminating reaction from the ammonifying tower bottom by ammonia, material after reaction finishes enters the magnesium hydroxide thickener at the bottom of tower, enter after thickening and carry out solid-liquid separation in the magnesium hydroxide filter, the magnesium hydroxide solid that obtains enters the magnesium hydroxide drying machine to carry out sending outside after the drying; The filtrate that obtains is for further processing, and described aminating reaction temperature is 25-90 ℃;
2) filtrate that obtains of step 1) is squeezed into the carbonating tower top by the mother liquor pump, pass into ammonia from carbonating tower bottom, carbonic acid gas carries out carburizing reagent, material after reaction finishes enters the magnesium basic carbonate thickener, after thickening, enter the magnesium basic carbonate filter and carry out solid-liquid separation, the magnesium basic carbonate solid that obtains is sent outside after entering magnesium basic carbonate drying machine drying, filtrate enters the multiple-effect evaporation unit, the evaporation condensate that obtains directly discharges, ammonium chloride and the ammonium sulfate of Crystallization Separation are sent outside, and described carbonation reaction temperature is 15-65 ℃.
The treatment process of described high density magnesium salts waste water is characterized in that ammonia passes into ammonifying tower and carbonating tower in the ammonia storage tank, between described ammonia storage tank and the ammonifying tower valve I is set, and the valve II is set between ammonia storage tank and the carbonating tower.
The treatment process of described high density magnesium salts waste water is characterized in that the described mol ratio that passes into magnesium ion in ammonia and the magnesium salts waste water of step 1) greater than 1.5:1, is preferably 1.5-5:1.
The treatment process of described high density magnesium salts waste water is characterized in that step 2) the described mol ratio that passes into magnesium ion in carbonic acid gas and the magnesium salts waste water is greater than 0.2:1, is preferably 0.2-2:1.
By adopting above-mentioned technology, compared with prior art, the beneficial effects of the utility model are as follows:
1) by adopting treatment facility of the present utility model, can be with Mg all in the magnesium salts waste water
2+, Cl
1-, SO
4 2-Ion is all reclaimed, and energy consumption is few, and discharging zero is polluted, and carbonic acid gas obtains comprehensive utilization, reduces carbon emission, has significant environmental benefit and social benefit;
2) treatment facility of the present utility model is simple in structure, can realize serialization, the maximization of wastewater treatment equipment, has thoroughly solved the grignard reaction high-salt wastewater that perplexs each manufacturing enterprise and has processed problem.
Description of drawings
Fig. 1 is the utility model structural representation.
Among the figure: 1-ammonifying tower, 2-magnesium hydroxide thickener, 3-magnesium hydroxide filter, 4-mother liquor pump, 5-magnesium hydroxide drying machine, 6-carbonating tower, 7-magnesium basic carbonate thickener, 8-magnesium basic carbonate filter, 9-magnesium basic carbonate drying machine, 10-multiple-effect evaporator group, 11-valve I, 12-valve II, 13-ammonia storage tank, 14-carbon dioxide storage tank.
Embodiment
The utility model will be further described below in conjunction with Figure of description and embodiment:
As shown in Figure 1, the utility model is processed high density magnesium salts waste fitment, comprise ammonifying tower 1, ammonifying tower 1 top is connected with the magnesium salts wastewater storage tank, the bottom is connected with ammonia storage tank 13, be used for passing into ammonia, between ammonia storage tank 13 and the ammonifying tower 1 valve I 11 is set, can control the intake of ammonia, ammonifying tower 1 bottom connects the top of magnesium hydroxide thickener 2, aminating reaction liquid enters magnesium hydroxide thickener 2 and carries out thickening, enter again in the magnesium hydroxide filter 3 and filter, the magnesium hydroxide solid is sent after entering magnesium hydroxide drying machine 5 dryings from magnesium hydroxide filter 3 tops, filtrate is sent into carbonating tower 6 from magnesium hydroxide filter 3 bottoms by mother liquor pump 4 and is entered carburizing reagent, carbonating tower 6 bottoms respectively with the ammonia storage tank 13 of carrying ammonia, the carbon dioxide storage tank 14 of transport of carbon dioxide connects, be used for logical ammonia and carbonic acid gas, between ammonia storage tank 13 and the carbonating tower 6 valve II 12 is set, the intake of control ammonia, carbonating tower 6 bottoms are connected with magnesium basic carbonate thickener 7, reaction solution after the carburizing reagent enters magnesium basic carbonate thickener 7 and carries out liquid-solid separation, magnesium basic carbonate thickener 7 bottoms are connected with magnesium basic carbonate filter 8, the solid that obtains after the filtration enters magnesium basic carbonate drying machine 9 from magnesium basic carbonate filter 8 tops, carry out the rear sample presentation of drying, magnesium basic carbonate filter 8 bottoms are connected with multiple-effect evaporator group 10, filtrate is steamed aftertreatment, evaporation condensate directly discharges, and ammonium chloride and the ammonium sulfate of Crystallization Separation are sent outside.
The treatment process of high density magnesium salts waste water of the present utility model: magnesium salts waste water is dropped in the reactor, pass into continuously ammonia and carbonic acid gas, adopt ammonia carbon method to process, it is fertile to obtain magnesium hydroxide, magnesium basic carbonate and ammonium, specifically comprises the steps:
1) magnesium salts waste water is added in the ammonifying tower 1 from the top, carry out aminating reaction from ammonifying tower 1 bottom by ammonia, material after reaction finishes enters the magnesium hydroxide thickener 2 at the bottom of tower, enter after thickening and carry out solid-liquid separation in the magnesium hydroxide filter 3, the magnesium hydroxide solid that obtains enters magnesium hydroxide drying machine 5 to carry out sending outside after the drying; The filtrate that obtains is for further processing; Ammonia passes into ammonifying tower 1 and carbonating tower 6 in ammonia storage tank 13, between described ammonia storage tank 13 and the ammonifying tower 1 valve I 11 is set, between ammonia storage tank 13 and the carbonating tower 6 valve II 12 is set, can be by the size of by-pass valve control I 11, thereby the amount of the magnesium hydroxide that control obtains, because aminating reaction of the present utility model is thermopositive reaction, need to cool off reaction solution by water coolant, temperature in the reaction process is relevant with the magnesium salts wastewater temperature that passes into, general aminating reaction temperature is controlled to be 25-90 ℃, preferred temperature is 35-50 ℃, the mol ratio of magnesium ion is greater than 1.5:1 in ammonia and the magnesium salts waste water, and it is excessive to drop into ammonia, behind the aminating reaction, magnesium ion partial reaction in the magnesium salts waste water, remaining magnesium ion enters next step reaction in filtrate;
2) filtrate that obtains of step 1) is squeezed into carbonating tower 6 tops by mother liquor pump 4, pass into ammonia from carbonating tower 6 bottoms, carbonic acid gas carries out carburizing reagent, carbonation reaction temperature is 15-65 ℃, pass into the mol ratio of magnesium ion in carbonic acid gas and the magnesium salts waste water greater than 0.2:1, material after reaction finishes enters magnesium basic carbonate thickener 7, after thickening, enter magnesium basic carbonate filter 8 and carry out solid-liquid separation, the magnesium basic carbonate solid that obtains is sent outside after entering magnesium basic carbonate drying machine 9 dryings, filtrate enters multiple-effect evaporation unit 10, the evaporation condensate that obtains directly discharges, and ammonium chloride and the ammonium sulfate of Crystallization Separation are sent outside.
After ammonia of the present utility model passes into, can be by the size of by-pass valve control I 11 and valve II 12, thus the amount of the magnesium hydroxide that control obtains, direct valve-off I 11, most magnesium ion is generated as magnesium basic carbonate in the waste water at this moment.
Technique of the present utility model is suitable for producing in batches, also is suitable for consecutive production, in industrial production, is generally consecutive production.
Embodiment 1:
Gram-waste water 700kg all passes into reactor, adds stirring, passes into ammonia 53kg first in reactor, wastewater temperature rises to 57.8 ℃ from 38.1 ℃, and the logical ammonia time is 90 minutes, stops to pass into ammonia, filter, the filtrate after the collection is squeezed in the reactor with pump again, and filter cake goes drying, passing into carbonic acid gas 33kg in reactor, temperature rises to 41.7 ℃ from 32.4 ℃, and aeration time is 100 minutes, stop to pass into carbonic acid gas, filter, filter cake goes drying, filtrate devaporation crystallization.Testing data is as follows:
| Unit | Theoretical | Actual | |
| The magnesium hydroxide productive rate | kg | 61.848 | 60.83 |
| The magnesium basic carbonate productive rate | kg | 33.602 | 32.29 |
| The magnesium salts total conversion rate | % | 99.97 | 97.74 |
Magnesium salts total conversion rate 97.74%, remaining 2.26% magnesium salts will be in the mother liquid evaporation processes, and ammonium salt separates out together, and it is fertile to form the compound ammonium of magnesium salts, and the evaporation condensate in the evaporative process can directly discharge, and need not to be for further processing.
Claims (3)
1. the treatment facility of high density magnesium salts waste water, it is characterized in that comprising ammonifying tower (1), ammonifying tower (1) bottom connects the top of magnesium hydroxide thickener (2), magnesium hydroxide thickener (2) bottom is connected with magnesium hydroxide filter (3), magnesium hydroxide filter (3) top is connected with magnesium hydroxide drying machine (5), the bottom is connected with carbonating tower (6) top by mother liquor pump (4), carbonating tower (6) bottom is connected with magnesium basic carbonate thickener (7), magnesium basic carbonate thickener (7) bottom is connected with magnesium basic carbonate filter (8), magnesium basic carbonate filter (8) top is connected with magnesium basic carbonate drying machine (9), and the bottom is connected with multiple-effect evaporator group (10).
2. the treatment facility of high density magnesium salts waste water according to claim 1 is characterized in that ammonifying tower (1) bottom is connected with the ammonia storage tank (13) of carrying ammonia, arranges valve I (11) between described ammonia storage tank (13) and the ammonifying tower (1).
3. the treatment facility of high density magnesium salts waste water according to claim 1, it is characterized in that carbonating tower (6) bottom is connected with the ammonia storage tank (13) of carrying ammonia, the carbon dioxide storage tank (14) of transport of carbon dioxide respectively, arranges valve II (12) between described ammonia storage tank (13) and the carbonating tower (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359371 CN202705176U (en) | 2012-07-24 | 2012-07-24 | Treatment equipment for high-concentration magnesium salt wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359371 CN202705176U (en) | 2012-07-24 | 2012-07-24 | Treatment equipment for high-concentration magnesium salt wastewater |
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| Publication Number | Publication Date |
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| CN202705176U true CN202705176U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220359371 Expired - Lifetime CN202705176U (en) | 2012-07-24 | 2012-07-24 | Treatment equipment for high-concentration magnesium salt wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399674A (en) * | 2018-10-24 | 2019-03-01 | 国家海洋局天津海水淡化与综合利用研究所 | A method of extracting bromine magnesium compound from Grignard reaction wastewater and mother liquor |
-
2012
- 2012-07-24 CN CN 201220359371 patent/CN202705176U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399674A (en) * | 2018-10-24 | 2019-03-01 | 国家海洋局天津海水淡化与综合利用研究所 | A method of extracting bromine magnesium compound from Grignard reaction wastewater and mother liquor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
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| CX01 | Expiry of patent term |