CN111423047A - Method and system for evaporating and concentrating percolate concentrated solution - Google Patents
Method and system for evaporating and concentrating percolate concentrated solution Download PDFInfo
- Publication number
- CN111423047A CN111423047A CN202010394781.2A CN202010394781A CN111423047A CN 111423047 A CN111423047 A CN 111423047A CN 202010394781 A CN202010394781 A CN 202010394781A CN 111423047 A CN111423047 A CN 111423047A
- Authority
- CN
- China
- Prior art keywords
- concentration
- evaporation
- feed liquid
- evaporative
- evaporation concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001704 evaporation Methods 0.000 title claims abstract description 164
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000008020 evaporation Effects 0.000 claims abstract description 155
- 239000007788 liquid Substances 0.000 claims abstract description 75
- 238000001914 filtration Methods 0.000 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 20
- 238000001556 precipitation Methods 0.000 claims abstract description 17
- 230000001376 precipitating effect Effects 0.000 claims abstract description 11
- 238000005189 flocculation Methods 0.000 claims description 51
- 230000016615 flocculation Effects 0.000 claims description 50
- 239000012141 concentrate Substances 0.000 claims description 28
- 238000011026 diafiltration Methods 0.000 claims description 17
- 239000003929 acidic solution Substances 0.000 claims description 12
- 229920002401 polyacrylamide Polymers 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 2
- 239000008394 flocculating agent Substances 0.000 claims 2
- 239000012530 fluid Substances 0.000 claims 2
- 238000004140 cleaning Methods 0.000 abstract description 5
- 239000002244 precipitate Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 30
- 239000000126 substance Substances 0.000 description 11
- 239000012535 impurity Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012471 diafiltration solution Substances 0.000 description 1
- 239000012527 feed solution Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- FZUJWWOKDIGOKH-UHFFFAOYSA-N sulfuric acid hydrochloride Chemical compound Cl.OS(O)(=O)=O FZUJWWOKDIGOKH-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The embodiment of the invention provides a method and a system for evaporating and concentrating percolate concentrated solution. The method for evaporating and concentrating the percolate concentrated solution comprises the following steps: carrying out first evaporation concentration on the feed liquid; filtering or precipitating the feed liquid subjected to the first evaporation concentration to remove suspended matters and solid particles in the feed liquid; and carrying out second evaporation concentration on the filtered or precipitated feed liquid. The method for evaporating and concentrating the percolate concentrated solution provided by the invention divides the evaporation process of the percolate concentrated solution into two parts, reduces the operation pressure of equipment, and filters or precipitates after the first evaporation and concentration, thereby effectively avoiding the problems that the percolate concentrated solution can generate inorganic scale and organic slime to block and adhere to a heat exchanger in the evaporation process to cause the reduction of the heat transfer efficiency of the equipment and cannot normally operate, and the filtration or precipitation process operates at high temperature, so that the heat loss can not be generated, and the continuous efficiency of the evaporation and concentration is accelerated while the cleaning period of the equipment is reduced.
Description
Technical Field
The invention relates to the technical field of sewage purification, in particular to an evaporation and concentration method and system for percolate concentrated solution.
Background
The percolate concentrate is complex in quality and contains various inorganic substances including sodium salt, calcium salt, magnesium salt, ammonium bicarbonate, sulfate chloride, silicon dioxide and organic substances with complex components. Evaporation is a physical process of separating volatile components from non-volatile components, heating the feed liquid to boil and vaporize water and continuously removing vaporized water vapor, so that the concentrated percolate is concentrated by an evaporation method.
During evaporation treatment of the percolate concentrate, water is boiled out of the percolate, pollutants remain in the concentrate, all heavy metals and inorganic substances and most organic substances are relatively weak in volatility and remain in the concentrate, and only part of pollutants such as volatile hydrocarbons, volatile organic acids and ammonia enter steam. However, since the concentrated leachate is a product obtained by concentrating the leachate by 2-5 times, calcium, magnesium and silicon in the concentrated leachate can easily form inorganic scale, organic matters can easily form organic sludge after concentration, and the scale gradually covers the inner wall of the equipment along with the increase of the multiple of evaporation concentration during evaporation concentration, so that the heat transfer efficiency of the equipment is often reduced, and the equipment cannot normally operate.
Disclosure of Invention
Embodiments of the present invention provide a method and a system for evaporation concentration of a percolate concentrate, so as to solve one or more technical problems in the prior art.
In a first aspect, embodiments of the present invention provide a method for evaporative concentration of a concentrate of a percolate, comprising:
adjusting the feed liquid to be an acidic solution;
carrying out first evaporation concentration on the feed liquid;
filtering or precipitating the feed liquid subjected to the first evaporation concentration to remove suspended matters and solid particles in the feed liquid;
and carrying out second evaporation concentration on the filtered or precipitated feed liquid.
In one embodiment, the total multiple of the first evaporative concentration and the second evaporative concentration is 10 times or more, and the multiple of the first evaporative concentration is less than the multiple of the second evaporative concentration.
In one embodiment, before the first evaporation concentration of the feed liquid, the method further comprises:
adjusting the feed liquid to be an acidic solution;
before the second evaporation concentration of the filtered or precipitated feed liquid, the method further comprises the following steps:
and adjusting the filtered or precipitated feed liquid to be an acidic solution.
In one embodiment, both the first evaporative concentration and the second evaporative concentration are performed using a mechanical vapor recompression method;
and the steam generated by the first evaporation and concentration serves as a heat source for the second evaporation and concentration, and the steam generated by the second evaporation and concentration serves as a heat source for the first evaporation and concentration.
In one embodiment, the step of filtering or precipitating the feed liquid subjected to the first evaporation concentration to remove suspended substances and solid particles in the feed liquid comprises:
introducing the evaporated and concentrated feed liquid into a flocculation tank at a high temperature;
adding PAM (Poly (acrylamide), polyacrylamide) flocculant and/or PAC (PolyAluminium Chloride) flocculant into a flocculation tank for flocculation and precipitation;
and filtering the solid particles and the floccules in the flocculation tank.
In a second aspect, embodiments of the present invention provide a diafiltration concentrate evaporative concentration system, comprising:
the first evaporation concentration device is used for carrying out first evaporation concentration on the feed liquid in the first evaporation concentration device;
the filtering device is communicated with the first evaporation and concentration device and is used for filtering or precipitating the feed liquid subjected to the first evaporation and concentration to remove suspended matters and solid particles in the feed liquid;
and the second evaporation concentration device is communicated with the filtering device and is used for carrying out second evaporation concentration on the feed liquid filtered or precipitated by the filtering device.
In one embodiment, the total evaporation concentration ratio of the first evaporation concentration device and the second evaporation concentration device is 10 times or more, and the evaporation concentration ratio of the first evaporation concentration device is smaller than the evaporation concentration ratio of the second evaporation concentration device.
In one embodiment, the diafiltration concentrate evaporative concentration system further comprises:
the outlet of the adjusting device is communicated with the first evaporation concentration device, and the adjusting device is used for adjusting the inflowing feed liquid into an acidic solution and then flowing into the first evaporation concentration device.
In one embodiment, the filtration device comprises:
the flocculation tank is communicated with the first evaporation concentration device and is used for containing feed liquid subjected to first evaporation concentration, wherein the flocculation tank is in a high-temperature state;
the feeding device is arranged above the flocculation tank and is used for adding a PAM (polyacrylamide) flocculant and/or a PAC (polyaluminium chloride) flocculant into the flocculation tank for flocculation;
further comprising:
the filter is arranged between pipelines communicated with the flocculation tank and the second evaporative concentration device and is used for filtering solid particles and floccules in the feed liquid when the feed liquid flocculated in the flocculation tank flows into the second evaporative concentration device; or,
and the sedimentation tank is arranged between the flocculation tank and a pipeline communicated with the second evaporative concentration device, and is used for settling solid particles and floccules in the feed liquid when the feed liquid flocculated in the flocculation tank flows into the second evaporative concentration device.
One of the above technical solutions has the following advantages or beneficial effects: the method for evaporating and concentrating the percolate divides the evaporation process of the percolate into two parts, reduces the operation pressure of equipment, and filters or precipitates after the first evaporation and concentration, thereby effectively avoiding the problems that inorganic scale formation and organic slime blockage are generated in the concentrated percolate evaporation process and attached to a heat exchanger to cause the reduction of the heat transfer efficiency of the equipment, the equipment cannot normally operate, the filtration or precipitation process operates at high temperature, the heat loss is not generated, and the continuous efficiency of the evaporation and concentration is accelerated while the cleaning period of the equipment is reduced.
The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and following detailed description.
Drawings
In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.
FIG. 1 shows a flow diagram of a method for the evaporative concentration of a concentrate of a percolate according to an embodiment of the present invention.
FIG. 2 shows another flow diagram of the evaporative concentration process of the diafiltration concentrate in an embodiment of the invention
FIG. 3 shows a further flow diagram of a process for the evaporative concentration of a concentrate of diafiltration in accordance with an embodiment of the present invention.
FIG. 4 shows a schematic diagram of an evaporative concentration system for a diafiltration concentrate in an embodiment of the invention.
FIG. 5 is a schematic diagram showing another embodiment of the evaporative concentration system for diafiltration concentrates according to an embodiment of the present invention.
Reference numerals:
110. a modulation device; 120. A first evaporative concentration unit; 130. A filtration device;
131. a flocculation tank; 132. A material feeder; 133. A filter;
134. a settling tank; 140. And a second evaporation and concentration device.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
FIG. 1 shows a flow chart of the steps of a method for evaporative concentration of a concentrate of diafiltration according to an embodiment of the present invention.
In a first aspect, embodiments of the present invention provide a method for evaporative concentration of a concentrate of a diafiltration solution. Referring to fig. 1, the method includes:
step S100: the feed liquid is evaporated and concentrated for the first time. The first evaporation concentration directly evaporates and concentrates the percolate concentrated solution only subjected to acid adjustment, and the first evaporation concentration of the step is to further concentrate the concentration of the percolate concentrated solution because the percolate concentrated solution contains a large amount of organic matters, inorganic matters and heavy metals, so that the preparation is carried out for the subsequent filtration or precipitation step, and the percolate concentrated solution is not treated by the evaporation and concentration. The feed liquid comprises percolate concentrate and high concentration percolate.
Step S200: and filtering or precipitating the feed liquid subjected to the first evaporation concentration to remove suspended matters and solid particles in the feed liquid. The leachate is further concentrated during the first evaporation and concentration, a flocculant or other modes are used for treating the leachate concentrated solution, and filtration or precipitation is carried out, so that a large amount of organic matters, inorganic matters and heavy metal substances in the leachate concentrated solution can be effectively removed, impurities can be removed as far as possible before secondary evaporation and concentration, the problem that inorganic scaling and organic slime blockage are generated in the leachate concentrated solution in the evaporation process and attached to a heat exchanger to cause the reduction of the heat transfer efficiency of equipment, and the filtration or precipitation process cannot normally operate, and does not generate heat loss when operating at high temperature.
Step S300: and carrying out second evaporation concentration on the filtered or precipitated feed liquid. The evaporation concentration in the step is completely to utilize evaporation to process the percolate concentrated solution, at the moment, the percolate concentrated solution is subjected to first evaporation concentration to remove a part of steam, and impurities in the percolate concentrated solution are further removed after filtration or precipitation, and the actually evaporated percolate concentrated solution of the second evaporation concentration at the moment is much lower than the impurity content in the normal percolate concentrated solution, so that the load factor of equipment is reduced by the second evaporation concentration, and meanwhile, the cleaning period of the equipment is longer because the impurity content is less during the evaporation concentration.
The method for evaporating and concentrating percolate provided by the embodiment divides the evaporation process of percolate concentrated solution into two parts for carrying out, reduces the operating pressure of equipment, and carries out filtration or precipitation after the first evaporation and concentration, the concentration multiple of the percolate concentrated solution is smaller, organic matters in the percolate concentrated solution cannot be attached to the inner wall of the equipment, at the moment, the filtration or precipitation is carried out for one time, impurities in the percolate concentrated solution are effectively reduced, the problems that inorganic scaling and organic slime blockage are generated in the evaporation process of the percolate concentrated solution and attached to a heat exchanger to cause the reduction of the heat transfer efficiency of the equipment, and the filtration or precipitation process is operated at high temperature, heat loss is avoided, and the continuous efficiency of evaporation and concentration is accelerated while the cleaning period of the equipment is reduced.
Further, the total multiple of the first evaporation concentration and the second evaporation concentration is 10 times or more. The multiple of two times of evaporation concentration is more than 10 times, the concentrated solution of the percolate is concentrated to the maximum degree, and meanwhile, the multiple is also used as the evaporation capacity with the highest efficiency, so that the maximum evaporation concentration efficiency of equipment is realized.
In one embodiment, the first evaporative concentration is less than the second evaporative concentration. As can be seen from the above embodiments, the first evaporation concentration aims at further concentration, which provides convenience for subsequent filtration or precipitation, and therefore, the second evaporation concentration is the main evaporation concentration step, and the multiple of the second evaporation concentration must be greater than that of the first evaporation concentration, so as to reduce the equipment load of the first evaporation concentration and purify the percolate concentrate without affecting the evaporation concentration effect.
In a specific embodiment, referring to fig. 2, before the step S100 of performing the first evaporation concentration on the feed liquid, the method further includes:
step S101: the feed solution is adjusted to be an acidic solution. Through multiple data comparison and experiments, the evaporation and concentration efficiency of the acidic feed liquid in the percolate concentrated solution is higher. And when the feed liquid is an acidic solution, the efficiency of the evaporation process can be effectively increased, and when the equipment material contains a titanium alloy or uses a protective layer made of a polyester material, the equipment can be effectively prevented from being corroded by the acidic feed liquid.
Further, before the second evaporation and concentration of the filtered or precipitated feed liquid, the method further comprises the following steps:
and adjusting the filtered or precipitated feed liquid to be an acidic solution. After multiple data comparison and experiments, when the feed liquid is acidic, the concentrated percolate evaporation and concentration efficiency is highest.
In one embodiment, the first evaporative concentration and the second evaporative concentration are both performed using a mechanical vapor recompression method. The mechanical vapor recompression utilizes secondary vapor generated in evaporation to increase pressure and temperature through compression, and the secondary vapor is sent to the heating chamber again to be used as hot vapor, so that the vapor generated in evaporation concentration is fully utilized, latent heat is recovered, efficiency is improved, and energy consumption is reduced.
And the steam generated by the first evaporation and concentration serves as a heat source for the second evaporation and concentration, and the steam generated by the second evaporation and concentration serves as a heat source for the first evaporation and concentration. Therefore, two steams generated by evaporation and concentration form a closed loop process, and energy consumption is effectively saved.
In one embodiment, referring to fig. 3, the step S200 of filtering or precipitating the feed liquid subjected to the first evaporation concentration includes:
s210: and introducing the evaporated and concentrated feed liquid into a flocculation tank at a high temperature.
S220: adding PAM flocculant and/or PAC flocculant into the flocculation tank for flocculation. The use of PAM flocculant and/or PAC flocculant in the flocculation process is a preferred embodiment, and this step should cover all technical solutions using other agents to achieve the flocculation effect.
S230: and filtering or precipitating the solid particles and the floccules in the flocculation tank.
In this embodiment, after the first evaporation concentration, the feed liquid is physically precipitated or filtered, so as to effectively remove solid particles, organic substances, inorganic substances and crystals generated by concentration, so as to provide a concentrated percolate solution with less impurities for the second evaporation concentration, thereby improving the efficiency of the second evaporation concentration.
In a second aspect, embodiments of the present invention provide an evaporative concentration system for a percolate, as illustrated in fig. 4, comprising a first evaporative concentration device 120, a filtration device 130 and a second evaporative concentration device 140.
The first evaporation concentration device 120 is used for carrying out first evaporation concentration on the feed liquid inside.
The filtering device 130 is communicated with the first evaporation concentration device 120, and the filtering device 130 is used for filtering or precipitating the feed liquid subjected to the first evaporation concentration to remove suspended substances and solid particles in the feed liquid.
The second concentration and evaporation device 140 is communicated 130 with the filtering device, and the second evaporation and concentration device 140 is used for carrying out second evaporation and concentration on the feed liquid filtered or precipitated by the filtering device.
According to the method for evaporating and concentrating the percolate concentrated solution, the evaporation process of the percolate concentrated solution is divided into two evaporation devices to be respectively carried out, the operation pressure of equipment is reduced, filtering or precipitation is carried out after first evaporation and concentration, the concentration multiple of the percolate concentrated solution is small, organic matters in the percolate concentrated solution cannot be attached to the inner wall of the equipment, at the moment, filtering or precipitation is carried out once, impurities in the percolate concentrated solution are effectively reduced, the cleaning period of the equipment is shortened, and the continuous efficiency of evaporation and concentration is accelerated.
In one embodiment, the total evaporation concentration multiple of the first evaporation concentration device 120 and the second evaporation concentration device 140 is 10 times and more than 10 times, and the evaporation concentration multiple of the first evaporation concentration device 120 is less than that of the second evaporation concentration device 140. As can be seen from the above embodiments, the first evaporation concentration is aimed at further concentration, which is convenient for subsequent filtration or precipitation, and therefore, the second evaporation concentration is the main evaporation concentration step, and the multiple of the second evaporation concentration must be greater than that of the first evaporation concentration, so as to reduce the load of the first evaporation concentration device 120 and purify the percolate concentrate without affecting the evaporation concentration effect of the second evaporation concentration device 140.
In one embodiment, referring to fig. 4, the first evaporative concentration apparatus 120 and the second evaporative concentration apparatus 140 are both mechanical vapor recompression apparatuses; wherein, the steam outlet of the first evaporation concentration device 120 is communicated with the heat source inlet of the second evaporation concentration device 140, and the steam outlet of the second evaporation concentration device 140 is connected with the heat source inlet of the first evaporation concentration device 120.
In one embodiment, referring to FIG. 4, the diafiltration concentrate evaporative concentration system further includes a brewing unit 110.
The outlet of the adjusting device 110 is communicated with the first evaporation concentration device 120, and the adjusting device 110 is used for adjusting the inflowing feed liquid into an acidic solution and then flowing into the first evaporation concentration device 120. When the feed liquid is an acidic solution, the efficiency of the evaporation process can be effectively increased, and when the equipment material contains a titanium alloy or uses a protective layer made of a polyester material, the equipment can be effectively prevented from being corroded by the acidic feed liquid.
In one embodiment, as shown in fig. 4, the filtration device 130 includes a flocculation basin 131, a batch feeder 132, and a filter 133.
A feeder 132 is arranged above the flocculation tank 131, and the feeder 132 is used for adding a PAM flocculant and/or a PAC flocculant into the flocculation tank 131 for flocculation and precipitation.
The filter 133 is disposed between the pipelines communicating the flocculation tank 131 with the second evaporative concentration apparatus 140, and the filter 133 is used for filtering solid particles and floccules in the feed liquid when the feed liquid flocculated in the flocculation tank 131 flows into the second evaporative concentration apparatus 140.
In one embodiment, as shown in fig. 5, the filtration device 130 includes a flocculation basin 131, a batch feeder 132, and a settling tank 134.
A feeder 132 is arranged above the flocculation tank 131, and the feeder 132 is used for adding a PAM flocculant and/or a PAC flocculant into the flocculation tank 131 for flocculation and precipitation.
The settling tank 134 is disposed between the pipelines communicating the flocculation tank 131 and the second evaporative concentration apparatus 140, and the settling tank 134 is used for settling solid particles and floccules in the feed liquid when the feed liquid flocculated in the flocculation tank 131 flows into the second evaporative concentration apparatus 140.
In this embodiment, after the first evaporation concentration, the feed liquid is physically precipitated or filtered, so as to effectively remove solid particles, organic substances, inorganic substances and crystals generated by concentration, so as to provide a concentrated percolate solution with less impurities for the second evaporation concentration, thereby improving the efficiency of the second evaporation concentration.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method for evaporative concentration of a concentrate of a diafiltration fluid comprising:
carrying out first evaporation concentration on the feed liquid;
filtering or precipitating the feed liquid subjected to the first evaporation concentration to remove suspended matters and solid particles in the feed liquid;
and carrying out second evaporation concentration on the filtered or precipitated feed liquid.
2. The diafiltration concentrated liquid evaporation concentration method according to claim 1, wherein the total multiple of the first evaporation concentration and the second evaporation concentration is 10 times and more, and the multiple of the first evaporation concentration is smaller than the multiple of the second evaporation concentration.
3. The method of evaporative concentration of a diafiltration concentrate according to claim 1, wherein the feed is further subjected to a first evaporative concentration, comprising:
adjusting the feed liquid to be an acidic solution;
before the second evaporation concentration of the filtered or precipitated feed liquid, the method further comprises the following steps:
and adjusting the filtered or precipitated feed liquid to be an acidic solution.
4. The evaporative concentration process of diafiltration concentrate according to claim 1, wherein both the first and second evaporative concentrations are carried out using a mechanical vapour recompression process;
and the steam generated by the first evaporation and concentration serves as a heat source for the second evaporation and concentration, and the steam generated by the second evaporation and concentration serves as a heat source for the first evaporation and concentration.
5. A process according to any one of claims 1 to 4 wherein the step of subjecting the first evaporatively concentrated feed to filtration or precipitation to remove suspended matter and solid particles from the feed comprises:
introducing the evaporated and concentrated feed liquid into a flocculation tank at a high temperature;
adding a PAM flocculating agent and/or a PAC flocculating agent into the flocculation tank for flocculation;
and filtering or precipitating the solid particles and the floccules in the flocculation tank.
6. An evaporative concentration system for a concentrate of a diafiltration fluid comprising:
the first evaporation concentration device is used for carrying out first evaporation concentration on the feed liquid in the first evaporation concentration device;
the filtering device is communicated with the first evaporation and concentration device and is used for filtering or precipitating the feed liquid subjected to the first evaporation and concentration to remove suspended matters and solid particles in the feed liquid;
and the second evaporation concentration device is communicated with the filtering device and is used for carrying out second evaporation concentration on the feed liquid filtered or precipitated by the filtering device.
7. The diafiltration evaporative concentration system according to claim 6, wherein the total evaporative concentration factor of the first and second evaporative concentration devices is 10 times and more, and the evaporative concentration factor of the first evaporative concentration device is less than the evaporative concentration factor of the second evaporative concentration device.
8. The diafiltration concentrate evaporative concentration system according to claim 7, further comprising:
the outlet of the adjusting device is communicated with the first evaporation concentration device, and the adjusting device is used for adjusting the inflowing feed liquid into an acidic solution and then flowing into the first evaporation concentration device.
9. The diafiltration concentrate evaporative concentration system of claim 6, wherein the first and second evaporative concentration devices are each mechanical vapor recompression devices; the steam outlet of the first evaporation concentration device is communicated with the heat source inlet of the second evaporation concentration device, and the steam outlet of the second evaporation concentration device is connected with the heat source inlet of the first evaporation concentration device.
10. The diafiltration concentrate evaporative concentration system according to any one of claims 6 to 9, wherein the filtration means comprises:
the flocculation tank is communicated with the first evaporation concentration device and is used for containing feed liquid subjected to first evaporation concentration, wherein the flocculation tank is in a high-temperature state;
the feeding device is arranged above the flocculation tank and is used for adding a PAM (polyacrylamide) flocculant and/or a PAC (polyaluminium chloride) flocculant into the flocculation tank for flocculation;
further comprising:
the filter is arranged between pipelines communicated with the flocculation tank and the second evaporative concentration device and is used for filtering solid particles and floccules in the feed liquid when the feed liquid flocculated in the flocculation tank flows into the second evaporative concentration device; or,
and the sedimentation tank is arranged between the flocculation tank and a pipeline communicated with the second evaporative concentration device, and is used for settling solid particles and floccules in the feed liquid when the feed liquid flocculated in the flocculation tank flows into the second evaporative concentration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010394781.2A CN111423047A (en) | 2020-05-11 | 2020-05-11 | Method and system for evaporating and concentrating percolate concentrated solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010394781.2A CN111423047A (en) | 2020-05-11 | 2020-05-11 | Method and system for evaporating and concentrating percolate concentrated solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111423047A true CN111423047A (en) | 2020-07-17 |
Family
ID=71558684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010394781.2A Pending CN111423047A (en) | 2020-05-11 | 2020-05-11 | Method and system for evaporating and concentrating percolate concentrated solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111423047A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010010718A (en) * | 1999-07-22 | 2001-02-15 | 고학봉 | Apparatus for treating landfill leachate by using heat source of landfill gas |
| CN103922543A (en) * | 2014-04-22 | 2014-07-16 | 东南大学 | Garbage leaching liquor treatment method |
| CN104211245A (en) * | 2013-06-03 | 2014-12-17 | 洁海瑞泉膜技术（北京）有限公司 | Treatment method of membrane-process concentrated solution of garbage leachate |
| CN205773862U (en) * | 2016-06-08 | 2016-12-07 | 广州汉泰环境技术有限公司 | A kind of evaporation and crystallization system for processing percolate |
| CN205856228U (en) * | 2016-05-12 | 2017-01-04 | 上海朴是环境科技有限公司 | Energy-saving sequence batch thermo-compression evaporation device |
| FR3059317A1 (en) * | 2016-11-25 | 2018-06-01 | France Evaporation | PROCESS FOR TREATING LIXIVIATES FROM WASTE STORAGE CENTERS |
| CN110066051A (en) * | 2019-05-23 | 2019-07-30 | 宁波斯蒂罗科技有限公司 | A kind of processing method of the dope evaporation condensed water of landfill leachate |
| CN110482632A (en) * | 2019-09-27 | 2019-11-22 | 北京天地人环保科技有限公司 | Rubbish percolation liquid membrane concentrate evaporating concentrating method and system |
| CN212198894U (en) * | 2020-05-11 | 2020-12-22 | 北京天地人环保科技有限公司 | Concentrated liquid evaporation concentration system of percolate |
-
2020
- 2020-05-11 CN CN202010394781.2A patent/CN111423047A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010010718A (en) * | 1999-07-22 | 2001-02-15 | 고학봉 | Apparatus for treating landfill leachate by using heat source of landfill gas |
| CN104211245A (en) * | 2013-06-03 | 2014-12-17 | 洁海瑞泉膜技术（北京）有限公司 | Treatment method of membrane-process concentrated solution of garbage leachate |
| CN103922543A (en) * | 2014-04-22 | 2014-07-16 | 东南大学 | Garbage leaching liquor treatment method |
| CN205856228U (en) * | 2016-05-12 | 2017-01-04 | 上海朴是环境科技有限公司 | Energy-saving sequence batch thermo-compression evaporation device |
| CN205773862U (en) * | 2016-06-08 | 2016-12-07 | 广州汉泰环境技术有限公司 | A kind of evaporation and crystallization system for processing percolate |
| FR3059317A1 (en) * | 2016-11-25 | 2018-06-01 | France Evaporation | PROCESS FOR TREATING LIXIVIATES FROM WASTE STORAGE CENTERS |
| CN110066051A (en) * | 2019-05-23 | 2019-07-30 | 宁波斯蒂罗科技有限公司 | A kind of processing method of the dope evaporation condensed water of landfill leachate |
| CN110482632A (en) * | 2019-09-27 | 2019-11-22 | 北京天地人环保科技有限公司 | Rubbish percolation liquid membrane concentrate evaporating concentrating method and system |
| CN212198894U (en) * | 2020-05-11 | 2020-12-22 | 北京天地人环保科技有限公司 | Concentrated liquid evaporation concentration system of percolate |
Non-Patent Citations (1)
| Title |
|---|
| 袁维芳等: "垃圾渗滤液处理技术及工程化发展方向", 《环境保护科学》, vol. 46, no. 1, pages 284 - 83 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2707011C (en) | Method for removing silica from evaporator concentrate | |
| Ye et al. | Full-scale treatment of landfill leachate by using the mechanical vapor recompression combined with coagulation pretreatment | |
| JP3477526B2 (en) | Wastewater recovery equipment | |
| CN110759571B (en) | Fly ash leachate treatment system and treatment method | |
| US20160176739A1 (en) | Water treatment device and water treatment method | |
| CN111217484A (en) | Desulfurization wastewater recycling treatment method | |
| CN109319997A (en) | A kind of method for treating garbage percolation liquid and system | |
| CN212198894U (en) | Concentrated liquid evaporation concentration system of percolate | |
| CN107572732B (en) | Sewage treatment system for hazardous waste treatment plant | |
| CN209368063U (en) | A kind of garbage percolation liquid treating system | |
| CN108928981A (en) | A kind of environment-friendly treating process of industrial wastewater | |
| CN111423047A (en) | Method and system for evaporating and concentrating percolate concentrated solution | |
| JP6649091B2 (en) | Phosphorus recovery method and phosphorus recovery equipment | |
| JP3844347B2 (en) | Method and apparatus for removing and recovering phosphorus from organic wastewater | |
| CN213416572U (en) | Evaporation device | |
| JP3366258B2 (en) | Method and apparatus for evaporating and concentrating sulfuric acid-containing wastewater | |
| JP2002096068A (en) | Treating method and device for waste water of desalting | |
| JP2002540915A (en) | Device for purifying fluid in the form of vapor delivered from a circuit | |
| JP7108392B2 (en) | Silica-containing water treatment apparatus and treatment method | |
| JPH10263558A (en) | Treatment of fluorine-containing desulfurized waste water | |
| JP2003340450A (en) | Method and system for treating heavy metal-containing waste water | |
| JPH1015533A (en) | Treatment method for drain of thermal power station | |
| JP5149323B2 (en) | Fluorine-containing water treatment method | |
| JP4061671B2 (en) | Thermal power plant wastewater treatment method | |
| JP2000167571A (en) | Treatment of selenium-containing water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |