CN203820520U - Calcium carbonate wastewater treatment system - Google Patents

Calcium carbonate wastewater treatment system Download PDF

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Publication number
CN203820520U
CN203820520U CN201420256482.2U CN201420256482U CN203820520U CN 203820520 U CN203820520 U CN 203820520U CN 201420256482 U CN201420256482 U CN 201420256482U CN 203820520 U CN203820520 U CN 203820520U
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China
Prior art keywords
calcium carbonate
waste water
treatment
gas
wastewater
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CN201420256482.2U
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Chinese (zh)
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杨合理
杨京
杨龙
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杨合理
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Abstract

The utility model relates to a calcium carbonate wastewater treatment system. The treatment system comprises a raw material feeding device, a wastewater agitation tank, a purified water drainage device, a raw material decomposition device, a gas tank, a solid storage cabin, a dissolving tank, a gas-liquid solvation tower, a clarification and sedimentation tank, a re-treatment device and a recovery device, which are connected with one another. The calcium carbonate wastewater treatment system is optimized in arrangement, takes calcium carbonate as a raw material, and enables the calcium carbonate to be subjected to high-temperature decomposition to generate calcium oxide, the calcium oxide is subjected to chemical combination, adsorption, agglomeration, separation and clarification together with wastewater to treat the waste water, as a result, the problems generated by that the calcium oxide is used to treat the wastewater in the prior art are effectively solved, the raw material is easy to get, secondary pollution is avoided, the manners of wastewater treatment is not limited, comprehensive wastewater drainage standard can be effectively met, the total cost of the wastewater treatment is lowered, the purposes of utilizing the calcium carbonate to treat the wastewater, including energy economization, environment protection and high efficiency, are fully achieved, and the calcium carbonate wastewater treatment system is suitable for being popularized and applied in the field of wastewater purification and treatment.

Description

Calcium carbonate Waste Water Treatment
Technical field
The utility model relates to technical field of waste water processing, particularly relates to a kind of calcium carbonate Waste Water Treatment.
Background technology
At present, water is seriously polluted, and sewage disposal highlights day by day to the importance of environmental protection.In existing sewage disposal reagent, calcium carbonate, calcium oxide are widely used, in the utilization of calcium oxide, be substantially all as the neutralization of sour water, coagulating sedimentation pre-treatment or the subsidiary deep level of processing that coordinates other water conditioner to carry out sewage of sewage calcium oxide; And adding in sewage in calcium oxide process, sewage per ton adds calcium oxide up to 5-10 kilogram, the problem that ubiquity consumption is large, correspondingly have that transportation cost is high, the large problem of blowdown flow rate, and, also easily cause that serious transport pipe in service stops up scale formation, expensive wasting time and energy.
In prior art, patent of invention ZL200810154940.0 discloses composite powdery calcium sulphate sewage treating agent and preparation method thereof, described sewage-treating agent comprises following material and weight part: 5-10 tartrate, 3-5 oxysuccinic acid, 60-70 calcium sulfate, 10-15 magnesiumcarbonate, 10-20 calcium carbonate, 10-20 iron trichloride, 10-20 calcium oxide, 2-3 polyacrylamide, and described method is for to mix above-mentioned substance successively; This invention adopts the water conditioner that calcium carbonate and calcium oxide are preparation of raw material, has stronger adaptability, is convenient to produce, but inevitably exists production cost high and easily cause the problems such as line clogging.
Patent of invention ZL201310681630.5 provides a kind of method to urban waters and sewage work's sewage disposal, sewage is added to milk of lime, regulate pH value 8.0~8.5, add again the liquid of water glass and sulfuric acid mixing gained through high speed agitator, adding sewage ratio is 0.01~0.05wt%, keep the instant viscosity of this mixed solution to be less than 50mPaS, keep pH value after 8.0~8.5 approximately 2 minutes, blast air or carbonic acid gas pH value is down to 7.5~7.8, sewage is put into settling bowl or air flotation pool separation water outlet and mud juice, mud juice filters through filter cloth or vacuum suction filter.This invention provides the method that flocculation is assembled to multiple pollutant, expand to a certain extent the process range of pollutent, it is to being applied as of milk of lime conventional application method of the prior art, and its application to water glass and sulfuric acid easily causes the corrosion of the equipment such as pipeline.
Therefore, urgently research and develop a kind of sewage disposal technology, reach the green wastewater treatment efficiency of energy-saving consumption-reducing, reduction Financial cost.
Utility model content
The purpose of this utility model is that the problem existing for prior art, provides calcium carbonate Waste Water Treatment, carries out wastewater treatment taking calcium carbonate as raw material, reduces the loss of energy and material, saves Financial cost, efficiently realizes the environmental protection processing of sewage, waste water.
The technical scheme that the utility model is dealt with problems is: a kind of calcium carbonate waste water treatment process is provided, comprises the steps:
(1) raw material processing
Raw material calcium carbonate is decomposed into calcium oxide and carbonic acid gas;
(2) the product processing of step (1)
(2.1) carbonic acid gas of collection step (1) gained;
(2.2) render in pending waste water after the calcium oxide of step (1) gained is dissolved as to saturated aqua calcis, and stir, fully mix;
(3) solid-liquid separation
The mixture of step (2.2) gained is carried out to solid-liquid separation;
(4) chemical combination adsorption-condensation
The gas that the clear liquid of step (3) gained is collected with step (2.1) contacts fused, the pollutent in adsorption-condensation waste water, Precipitation;
(5) precipitate and separate
Step (4) gained mixture is separated, and gained throw out recycles, and gained liquid detects;
(6) product processing
(6.1) up to standard if gained liquid detects to step (5), directly carry out recycle or discharge; If step (5) gained liquid detecting is not up to standard, process again, to detecting carry out recycle or discharge up to standard;
(6.2) step (5) gained throw out is separated, separating obtained calcium carbonate carries out the recycle of step (1), and isolated pollutent is transported outward or recycled after harmless treatment.
Further, in described step (1), under the hot conditions by raw material calcium carbonate more than 1300 DEG C, be decomposed into calcium oxide and carbonic acid gas; In described step (2.2), directly render in pending waste water after the high temperature oxidation calcium of step (1) gained is dissolved as to saturated aqua calcis, and stir, fully mix.
Further, in described step (4), the pH value that the gas that the clear liquid of step (3) gained is collected with step (2.1) contacts fused rear gained mixture is 7.5~8.5.
Further, in described (2.1), collect the carbonic acid gas of step (1) gained by gas-holder; In described step (4), the clear liquid of step (3) gained contacts in gas-liquid mixing tower with the gas that step (2.1) is collected, and described gas-liquid mixing chamber is connected with gas-holder.Preferably, in described step (4), the gas that the clear liquid of step (3) gained is collected with step (2.1) by spray mode contacts fused.
Further, in described step (5), carry out the separation of mixture by clarification settling tank; In described step (6.1), to detecting step (5) gained liquid not up to standard, be transported to again in treatment unit and process again, described treatment unit is again connected with described clarification settling tank, in described treatment unit again, liquid not up to standard is added to calcium oxide and carbonic acid gas.
Preferably, in the utility model calcium carbonate waste water treatment process, can adopt calcite, chalk, limestone, marble etc. as calcium carbonate raw material.
In the utility model calcium carbonate waste water treatment process, pending waste water indefinite, can be any trade effluent, sanitary wastewater; Preferably applicable waste water is that BOD/COD is that 0.3~0.5, COD (mg/L) is that 500~5000, BOD (mg/L) is 250~3000; Preferably, the pending waste water adopting in step (2.2) is pretreated waste water, and preferably, after pre-treatment, in waste water, gross contamination substrate concentration is at 500~10000mg/L, and the consumption of corresponding calcium oxide is 30~1400g/T.
The utility model also provides a kind of calcium carbonate Waste Water Treatment, comprise feedstock supply unit, waste water agitated pool and the discharger of purifying waste water, also comprise: the raw material decomposer being connected with described feedstock supply unit, the gas-holder and the solid storage silo that are connected respectively with described raw material decomposer, the dissolving tank being connected with described solid storage silo, the gas-liquid mixing tower being connected respectively with dissolving tank with described gas-holder, the clarification settling tank being connected with described gas-liquid mixing tower, the treatment unit being again connected with described clarification settling tank, the retrieving arrangement being connected with described treatment unit again, described waste water agitated pool is connected with described dissolving tank, described in the discharger of purifying waste water be connected with described clarification settling tank.
Further, described raw material decomposer is closed High Temperature Furnaces Heating Apparatus.
Further, in described gas-liquid mixing tower, be disposed with from top to bottom gas-liquid mixing chamber and gas-liquid mixing pond, described gas-holder is connected with described gas-liquid mixing chamber, and described clarification settling tank is connected with described gas-liquid mixing pond.
Further, described treatment unit again comprises spray oxygen-increasing device and separator, and described spray oxygen-increasing device is connected with described clarification settling tank respectively with separator; Described separator is connected respectively with feedstock supply unit with described retrieving arrangement.
In the utility model calcium carbonate waste water treatment process, carry out wastewater treatment taking calcium carbonate as raw material, raw material is easy to get, and effectively reduces costs, and treatment process optimization, simple and easy to do, non-secondary pollution produces, and the kind of processing waste water is not limited, can efficiently reach integrated wastewater discharge standard, effectively solve the problem that prior art uses calcium oxide to carry out sewage disposal existence, and significantly improved sewage disposal level, reduced the total cost of sewage disposal; In addition, later stage residuum has been carried out processing again, whole technical process is not produced when environment is caused to the material of secondary pollution, and obtained the raw material that carries out recycling; Meanwhile, calcium carbonate Waste Water Treatment of the present utility model, has fully realized application calcium carbonate and has carried out the energy-saving and environmental protection of wastewater treatment, efficient target.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model is novel in design rationally, and the simple and environmental protection of technical process, has realized the safe and efficient of wastewater treatment, has reduced raw material input cost, also correspondingly, has effectively improved the efficiency of wastewater treatment, has reduced economic input;
2, the utility model effects of energy conservation and environmental protection is remarkable, without adding other reagent, and the recycling of wastewater treatment after product, Financial cost significantly reduces, and is suitable for applying in purification of waste water process field.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model calcium carbonate Waste Water Treatment.
Shown in figure: 1-feedstock supply unit; 2-waste water agitated pool; The 3-discharger of purifying waste water; 4-raw material decomposer; 5-gas-holder; 6-solid storage silo; 7-dissolving tank; 8-gas-liquid mixing tower, 801-gas-liquid mixing chamber, 802-gas-liquid mixing pond; 9-clarifies settling tank; 10-is treatment unit again; 11-retrieving arrangement.
Embodiment
Embodiment 1
A kind of calcium carbonate waste water treatment process of the present utility model, comprises the steps:
(1) raw material processing
Raw material calcium carbonate is decomposed into calcium oxide and carbonic acid gas;
(2) the product processing of step (1)
(2.1) carbonic acid gas of collection step (1) gained;
(2.2) render in pending waste water after the calcium oxide of step (1) gained is dissolved as to saturated aqua calcis, and stir, fully mix;
(3) solid-liquid separation
The mixture of step (2.2) gained is carried out to solid-liquid separation;
(4) chemical combination adsorption-condensation
The gas that the clear liquid of step (3) gained is collected with step (2.1) contacts fused, the pollutent in adsorption-condensation waste water, Precipitation;
(5) precipitate and separate
Step (4) gained mixture is separated, and gained throw out recycles, and gained liquid detects;
(6) product processing
(6.1) up to standard if gained liquid detects to step (5), directly carry out recycle or discharge; If step (5) gained liquid detecting is not up to standard, process again, to detecting carry out recycle or discharge up to standard;
(6.2) step (5) gained throw out is separated, separating obtained calcium carbonate carries out the recycle of step (1), and isolated pollutent is transported outward or recycled after harmless treatment.
In above-mentioned the utility model calcium carbonate waste water treatment process, can adopt calcite, chalk, limestone, marble etc. as calcium carbonate raw material; For improving the efficiency of wastewater treatment, for the granularity of the raw material calcium carbonate described in technique and calcium oxide taking Powdered for preferred.
In above-mentioned the utility model calcium carbonate waste water treatment process, pending waste water indefinite, can be any trade effluent, sanitary wastewater; Preferably applicable waste water is that BOD/COD is that 0.3~0.5, COD (mg/L) is that 500~5000, BOD (mg/L) is 250~3000; For making waste water obtain more efficient purifying treatment, preferably, the pending waste water adopting in step (2.2) is pretreated waste water, preferably, after pre-treatment, in waste water, gross contamination substrate concentration is at 500~10000mg/L, and the consumption of corresponding calcium oxide is 30~1400g/T, because the solubleness of calcium oxide is what determine, so, to repeatedly add for the usage quantity of too high dissolved contaminants waste water.
Above-mentioned the utility model calcium carbonate waste water treatment process can be undertaken by following calcium carbonate Waste Water Treatment, as shown in Figure 1, a kind of calcium carbonate Waste Water Treatment of the present utility model comprises feedstock supply unit 1, waste water agitated pool 2 and the discharger 3 of purifying waste water, also comprise: the raw material decomposer 4 being connected with feedstock supply unit 1, the gas-holder 5 being connected respectively with raw material decomposer 4 and solid storage silo 6, the dissolving tank 7 being connected with solid storage silo 6, the gas-liquid mixing tower 8 being connected respectively with dissolving tank 7 with gas-holder 5, the clarification settling tank 9 being connected with gas-liquid mixing tower 8, the treatment unit again 10 being connected with clarification settling tank 9, with the retrieving arrangement 11 that treatment unit 10 is connected again, waste water agitated pool 2 is connected with dissolving tank 7, and the discharger 3 of purifying waste water is connected with clarification settling tank 9.
In the calcium carbonate waste water treatment process carrying out at application the utility model calcium carbonate Waste Water Treatment, in step (1), to the calcium carbonate that supplies raw material in raw material decomposer 4, raw material calcium carbonate is decomposed into calcium oxide and carbonic acid gas by feedstock supply unit 1; In step (2), collect the carbonic acid gas of step (1) gained by gas-holder 5, collect the calcium oxide of step (1) gained by solid storage silo 6, determine Calcium Oxide Dosage and granularity according to the amount of pending waste water, the calcium oxide of institute's expense is dissolved in dissolving tank 7, the saturated aqua calcis that dissolves gained is rendered in waste water agitated pool 2 and fully mixed with pending waste water, then carry out step (3); In step (4), the gas that the clear liquid of step (3) gained is collected with step (2.1) carries out contacting fully fused in gas-liquid mixing tower 8, pollutent in adsorption-condensation waste water, Precipitation, for making waste water obtain processing more efficiently, gas-liquid mixing tower 8 setting that is connected with gas-holder 5; In step (5), in clarification settling tank 9, step (4) gained mixture is separated, gained throw out recycles, and gained liquid detects; In step (6), up to standard if gained liquid detects to step (5), directly carry out recycle or discharge by the discharger 3 of purifying waste water; If step (5) gained liquid detecting is not up to standard, process again by treatment unit 10 again, to detecting carry out recycle or discharge up to standard; Step (5) gained throw out is reclaimed by retrieving arrangement 11, and the calcium carbonate of gained carries out the recycle of step (1), and the pollutent of gained is transported outward or recycled after harmless treatment; In addition, by treatment unit 10 again, later stage residuum is processed again, whole technical process is not produced when environment is caused to the material of secondary pollution, can obtain calcium carbonate by separation and carry out recycling as raw material.By above-mentioned application, the pH value of recycle after treatment or outer draining is (to meet within the scope of the value emission standard of PH7~9) between 7.5-8.5, reaches GB20406-1996 national sewage comprehensive emission standard.And above-mentioned application is not subject to region and environmental restraint.Generally, the utility model calcium carbonate waste water treatment process carries out wastewater treatment taking calcium carbonate as raw material, raw material is easy to get, and effectively reduces costs, and treatment process optimization, simple and easy to do, non-secondary pollution produces, and the kind of processing waste water is not limited, can efficiently reach integrated wastewater discharge standard, effectively solve the problem that prior art uses calcium oxide to carry out sewage disposal existence, and significantly improved sewage disposal level, reduced the total cost of sewage disposal; Fully realize application calcium carbonate and carried out the energy-saving and environmental protection of wastewater treatment, efficient target.
Embodiment 2
A kind of calcium carbonate waste water treatment process basic step of the present utility model, with embodiment 1, particularly, also comprises:
In described step (1), under the hot conditions by raw material calcium carbonate more than 1300 DEG C, be decomposed into calcium oxide and carbonic acid gas; In described step (2.2), directly render in pending waste water after the high temperature oxidation calcium of step (1) gained is dissolved as to saturated aqua calcis, and stir, fully mix.
In the above-described embodiments, under the hot conditions of calcium carbonate more than 1300 DEG C, decompose gained calcium oxide for the lime that overdoes, compared to existing technique of carrying out wastewater treatment by unslaked lime preparing hydrogen calcium oxide solution, shorter and the saturated aqua calcis of clarifying that is more easy to get to consuming time under the saturated aqua calcis equal conditions obtaining by the lime that overdoes, being produced by the lime that overdoes in the saturated aqua calcis process of clarification, saturated aqua calcis separates rapidly with the lime that overdoes, or even the lime powder dissolving preparing hydrogen calcium oxide solution that overdoes can not produce muddiness yet, thereby the milky turbidity having formed while fully having avoided by unslaked lime preparing hydrogen calcium oxide solution, and then efficient economizing the time of filtration treatment, also avoided inducing one to be difficult to the secondary pollutant of filtering separation in waste water, the cost of wastewater treatment is also correspondingly reduced.
Above-mentioned the utility model calcium carbonate waste water treatment process can be undertaken by following calcium carbonate Waste Water Treatment, as shown in Figure 1, a kind of calcium carbonate Waste Water Treatment basic structure of the present utility model arranges same embodiment 1, particularly, described raw material decomposer 4 is closed High Temperature Furnaces Heating Apparatus, concrete as airtight electromagnetic induction High Temperature Furnaces Heating Apparatus etc., and application closed High Temperature Furnaces Heating Apparatus decomposes calcium carbonate, can ensure and obtain the highly purified lime that overdoes, and then provide safeguard for follow-up wastewater treatment operation.
Embodiment 3
A kind of calcium carbonate waste water treatment process basic step of the present utility model is with embodiment 1 or embodiment 2, particularly, for ensureing that the follow-up residuum of processing again gained is fully recycled, especially ensure the abundant acquisition of calcium carbonate and the recycling as raw material, in described step (4), the pH value that the gas that the clear liquid of step (3) gained is collected with step (2.1) contacts fused rear gained mixture is 7.5-8.5.
Above-mentioned the utility model calcium carbonate waste water treatment process can be by as shown in Figure 1 same embodiment 1 or the calcium carbonate Waste Water Treatment of embodiment 2.
Embodiment 4
As shown in Figure 1, the calcium carbonate Waste Water Treatment basic setup of a kind of calcium carbonate waste water treatment process basic step of the present utility model and employing is with embodiment 1, embodiment 2 or embodiment 3, particularly, for improving purification efficiency, in described step (4), the carbon dioxide that the clear liquid of step (3) gained is collected with step (2.1) by spray mode contacts fused in the fused tower of gasification; Preferably, can carry more quickly for making carbon dioxide, improve purification efficiency, in gas-liquid mixing tower 8, be disposed with from top to bottom gas-liquid mixing chamber 801 and gas-liquid mixing pond 802, described gas-holder 5 is connected with gas-liquid mixing chamber 801, and clarification settling tank 9 is connected with gas-liquid mixing pond 802; From but step (3) the gained clear liquid of spray mix fully efficiently gas-liquid mixing chamber 801 with carbon dioxide, after mixing, fall into gas-liquid mixing pond 802, then be transported to clarify in settling tank 9 by transport pipe and separate; For the operation that ensures technique and system can loop, in treatment unit 10 again, to liquid not up to standard, by adding calcium oxide and carbonic acid gas is processed again, then product after treatment returns to be transported in clarification settling tank 9 again and carries out precipitate and separate; Correspondingly, the setting of calcium carbonate Waste Water Treatment is preferably: described treatment unit again 10 comprises spray oxygen-increasing device and separator (not shown), and described spray oxygen-increasing device is connected with clarification settling tank 9 respectively with separator; Described separator is connected respectively with feedstock supply unit 1 with retrieving arrangement 11, described spray oxygen-increasing device is for adding aqua calcis prepared by calcium oxide, the throw out that described separator is discharged for the clarification settling tank 9 that retrieving arrangement 11 is reclaimed carries out high efficiency separation, so that the calcium carbonate in residuum recycled fully, thereby realize the circular treatment of the environmental protection of waste water.
The utility model is not limited to above-mentioned embodiment, those skilled in the art make to any apparent improvement of above-mentioned embodiment or change, can not exceed the protection domain of design of the present utility model and claims.

Claims (4)

1. a calcium carbonate Waste Water Treatment, comprise feedstock supply unit, waste water agitated pool and the discharger of purifying waste water, it is characterized in that, also comprise: the raw material decomposer being connected with described feedstock supply unit, the gas-holder and the solid storage silo that are connected respectively with described raw material decomposer, the dissolving tank being connected with described solid storage silo, the gas-liquid mixing tower being connected respectively with dissolving tank with described gas-holder, the clarification settling tank being connected with described gas-liquid mixing tower, the treatment unit being again connected with described clarification settling tank, the retrieving arrangement being connected with described treatment unit again, described waste water agitated pool is connected with described dissolving tank, described in the discharger of purifying waste water be connected with described clarification settling tank.
2. calcium carbonate Waste Water Treatment according to claim 1, is characterized in that: described raw material decomposer is closed High Temperature Furnaces Heating Apparatus.
3. calcium carbonate Waste Water Treatment according to claim 1, it is characterized in that: in described gas-liquid mixing tower, be disposed with from top to bottom gas-liquid mixing chamber and gas-liquid mixing pond, described gas-holder is connected with described gas-liquid mixing chamber, and described clarification settling tank is connected with described gas-liquid mixing pond.
4. calcium carbonate Waste Water Treatment according to claim 1, is characterized in that: described treatment unit again comprises spray oxygen-increasing device and separator, and described spray oxygen-increasing device is connected with described clarification settling tank respectively with separator; Described separator is connected respectively with feedstock supply unit with described retrieving arrangement.
CN201420256482.2U 2014-05-20 2014-05-20 Calcium carbonate wastewater treatment system Expired - Fee Related CN203820520U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103979656A (en) * 2014-05-20 2014-08-13 杨合理 Calcium carbonate wastewater treatment technology and system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103979656A (en) * 2014-05-20 2014-08-13 杨合理 Calcium carbonate wastewater treatment technology and system

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Granted publication date: 20140910

Termination date: 20170520