CN113800490A - Method for preparing crude sodium pyrophosphate by combustion conversion of phosphorus-containing waste liquid - Google Patents
Method for preparing crude sodium pyrophosphate by combustion conversion of phosphorus-containing waste liquid Download PDFInfo
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- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 82
- 239000011574 phosphorus Substances 0.000 title claims abstract description 82
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000002699 waste material Substances 0.000 title claims abstract description 71
- 239000007788 liquid Substances 0.000 title claims abstract description 65
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 60
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 title claims abstract description 27
- 229940048086 sodium pyrophosphate Drugs 0.000 title claims abstract description 27
- 235000019818 tetrasodium diphosphate Nutrition 0.000 title claims abstract description 27
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000003345 natural gas Substances 0.000 claims abstract description 52
- 239000007921 spray Substances 0.000 claims abstract description 20
- 238000009688 liquid atomisation Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 22
- 238000000889 atomisation Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000005562 Glyphosate Substances 0.000 description 6
- XDDAORKBJWWYJS-UHFFFAOYSA-N glyphosate Chemical compound OC(=O)CNCP(O)(O)=O XDDAORKBJWWYJS-UHFFFAOYSA-N 0.000 description 6
- 229940097068 glyphosate Drugs 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000012265 solid product Substances 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004471 Glycine Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000003017 phosphorus Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/38—Condensed phosphates
- C01B25/42—Pyrophosphates
- C01B25/425—Pyrophosphates of alkali metals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/10—Liquid waste
- F23G2209/101—Waste liquor
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a method for preparing crude sodium pyrophosphate by efficiently burning and converting phosphorus-containing waste liquid. Inputting natural gas into a natural gas conveying pipeline of the internal mixing type combustor, enabling a natural gas spray gun to burn through an ignition source, supporting combustion through corresponding air supply of a concentrated air supply pipeline under the condition of reference natural gas input quantity, and respectively setting according to the following conditions: A. when the combustion temperature rises, the air distribution amount of air supply is increased, and then a phosphorus-containing waste liquid atomization spray gun is started; when the combustion temperature continues to rise, the air distribution amount of the supplied air is continuously increased; C. the combustion temperature is maintained between 760 ℃ and 780 ℃ by gradually reducing the input amount of natural gas. The advantages are that: the combustion area has sufficient combustion air, the flame combustion area of the material has sufficient oxygen content, the combustion efficiency of the material is improved, and the full reaction of combustion conversion is promoted, so that the consumption of natural gas is reduced, and the content of crude sodium pyrophosphate converted by the combustion of the phosphorus-containing waste liquid is improved.
Description
Technical Field
The invention relates to a treatment technology of phosphorus-containing waste liquid in chemical waste, in particular to a method for preparing crude sodium pyrophosphate by efficiently burning and converting the phosphorus-containing waste liquid.
Background
The phosphorus-containing wastewater is one of the pollutants in the production of phosphorus chemical industry. According to statistics, the phosphorus recovery capacity of China per year reaches 108 ten thousand tons, wherein the phosphorus recovery capacity of industrial wastewater is 30 ten thousand tons. Organic phosphorus chemical industry is an important component of phosphorus chemical industry, and the annual product yield of the organic phosphorus chemical industry accounts for more than 40 percent of the total product yield of the phosphorus chemical industry. Glyphosate is widely applied to the agricultural field for killing malignant weeds due to the advantages of high efficiency, low toxicity, relative safety and the like, and glyphosate phosphorus-containing waste liquid generated in the production process is typical high-concentration organic phosphorus wastewater. The glyphosate is produced by adopting an IDA method or a glycine method, and the generated glyphosate phosphorus-containing waste liquid has the characteristics of high phosphorus, high salt, high COD, complex components and difficult degradation, and has large treatment difficulty and high cost. If the phosphorus-containing waste liquid is directly discharged as waste liquid, not only the loss of target products is caused, but also serious water quality pollution is caused. In the process of producing glyphosate, about 30-35% of phosphorus element generally enters the phosphorus-containing waste liquid, and the phosphorus element in the phosphorus-containing waste liquid of glyphosate is recycled, so that the utilization rate of phosphorus is improved, the benefits of enterprises can be increased, and resource guarantee is provided for economic sustainable development.
In the prior art, a patent No. 201720245228.6 has been disclosed, the name is a phosphorus-containing waste liquid co-combustion ware's utility model patent, specifically discloses the structure of constituteing by burning chamber and feed liquor chamber in this patent, wherein, the conveying that carries out combustion-supporting air through first, second, third inlet channel in the burning chamber, can realize the effective processing of phosphorus-containing waste liquid through this phosphorus-containing waste liquid co-combustion ware, but still has following problem:
(1) the burner has the defects that the air supply form is dispersed, the back-mixing entrainment effect of smoke generated by material combustion is large, and the situation of coking and blockage of an air supply channel can be caused, so that the problem that phosphorus-containing waste liquid can not be sufficiently combusted is solved.
(2) Because this structural design is defect itself, make the difficult control of its whole process of handling, make the treatment means who adopts in the processing procedure also receive the limitation, consequently, adopt this kind of combustor when carrying out the waste liquid combustion conversion that contains phosphorus, the combustion effect is poor, in addition, the combustion parameter and the process that set for in its processing procedure are also unreasonable, the weakening of treatment effect has more aggravated, the waste of environmental pollution and raw materials has been caused, practice proves, natural gas consumption per ton crude sodium pyrophosphate is 153m year, natural gas consumption is higher.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preparing crude sodium pyrophosphate by efficiently combusting and converting phosphorus-containing waste liquid, which can effectively improve the content of the crude sodium pyrophosphate converted by combusting the phosphorus-containing waste liquid and simultaneously can prevent solid dust entrained by smoke entrainment and back mixing from blocking a burner nozzle.
In order to solve the technical problems, the method for preparing crude sodium pyrophosphate by efficiently combusting and converting phosphorus-containing waste liquid comprises the steps of inputting natural gas with 300 Nm/h as a reference into a natural gas conveying pipeline of an internal mixing type combustor consisting of a natural gas conveying pipeline, a concentrated air supply pipeline sleeved outside the natural gas conveying pipeline and a plurality of phosphorus-containing waste liquid atomizing spray guns uniformly distributed on the periphery of the concentrated air supply pipeline, combusting the natural gas spray guns by an ignition source, and simultaneously carrying out combustion supporting by corresponding air supply 500 Nm/h of the concentrated air supply pipeline under the condition of natural gas input with 300 Nm/h as the reference, and respectively setting according to the following conditions:
A. when the combustion temperature is increased to 600 ℃, the air distribution amount of the air supply is increased by 1000 & lt- & gt 2000 Nm/h, then the phosphorus-containing waste liquid atomizing spray gun is started, the input flow of the atomizing gas is increased to 120 & lt- & gt 180 Nm/h, and the continuous input flow of the phosphorus-containing waste liquid is increased to 0.8-2.0m during cultivation;
B. when the combustion temperature is increased to 760 ℃, continuing increasing the air distribution amount of the air supply to 2000 and 3000 Nm/h, and carrying out cultivation under conditions that the input flow of the phosphorus-containing waste liquid atomizing spray gun is 2.0-3.7 m/h;
C. when the burning temperature shows a rising trend of 10-30 ℃/min continuously for 10min, the burning temperature is maintained between 760 ℃ and 780 ℃ by gradually reducing the input amount of natural gas.
And C, stopping reducing the input amount of the natural gas when the combustion temperature does not continuously rise between 760 ℃ and 780 ℃ and the combustion is continuously performed for 20min in a stable trend.
In the step A, the atomization of the atomization gas is to break up the phosphorus-containing waste liquid into phosphorus-containing waste liquid fog drops through the atomization holes of the phosphorus-containing waste liquid atomization spray gun, and the particle size of the phosphorus-containing waste liquid atomization is 60-300 microns.
In the step A, the source of the atomizing gas is a gas with pressure.
The air supply source of the centralized air supply pipeline is a ventilator, a blower or a compressor.
The invention has the advantages that:
(1) on the premise of a concentrated air supply pipeline coaxially sleeved outside the natural gas conveying pipeline, sufficient combustion-supporting air is provided for a combustion area through a conversion combustion mode of concentrated air supply, so that a flame combustion area of materials has sufficient oxygen content, the combustion efficiency of the materials is improved, the full reaction of combustion conversion is promoted, the consumption of natural gas is reduced, and the content of crude sodium pyrophosphate of the combustion conversion of the phosphorus-containing waste liquid is improved.
(2) The air distribution amount of air supply and the input amount of natural gas are respectively controlled under the condition of sectional type combustion temperature, and combustion conversion can be fully performed under the lowest energy consumption, so that the aim of reducing the consumption of the natural gas on the premise of complete conversion combustion is fulfilled, the energy is further saved, and the content of crude sodium pyrophosphate is effectively improved.
(3) Through the improvement of the whole treatment process, the self heat value of the phosphorus-containing waste liquid can be completely excited under the condition of sufficient combustion air distribution, the self heat value is utilized for carrying out combustion conversion reaction, the phosphorus-containing waste liquid is changed into a solid product after being combusted and converted, the solid product falls and is collected, meanwhile, the phosphorus-containing waste liquid atomizing spray gun is started at a proper time, the input flow of the phosphorus-containing waste liquid is adjusted in a specific time, the resource allocation can be further optimized, the energy is further saved, and the content of crude sodium pyrophosphate is effectively improved.
(4) On the basis of the process, the back mixing effect of the flue gas entrainment solid dust particles is avoided through the jet flow field of the centralized gas supply, and the problem that the solid dust particles block the nozzle of the combustor is solved.
Drawings
FIG. 1 is a schematic front view of a phosphorus-containing waste liquid internal mixing type burner used in the present invention;
FIG. 2 is a schematic side view of the internal mixing type burner for phosphorus-containing waste liquid used in the present invention.
Detailed Description
The internal mixing type burner for phosphorus-containing waste liquid according to the present invention will be described in detail with reference to the accompanying drawings and embodiments.
As shown in the figure, the method for preparing crude sodium pyrophosphate by efficiently burning and converting phosphorus-containing waste liquid comprises the steps of inputting natural gas into a natural gas conveying pipeline of an internal mixing type burner consisting of a natural gas conveying pipeline 1, a concentrated air supply pipeline 2 coaxially sleeved outside the natural gas conveying pipeline and a plurality of phosphorus-containing waste liquid atomizing spray guns 5 uniformly distributed on the periphery of the concentrated air supply pipeline 2, enabling the natural gas spray guns to burn through an ignition source, increasing the burning air distribution amount of the concentrated air supply when the temperature is raised to a certain temperature, starting the phosphorus-containing waste liquid atomizing spray guns to enable a small amount of phosphorus-containing waste liquid to be continuously input while atomizing air is input, continuously and gradually increasing the burning air distribution amount and the input amount of the phosphorus-containing waste liquid when the temperature is raised (to a normal process), gradually reducing the input amount of the natural gas when the burning temperature is raised and stably burning without continuous rise, stopping reducing the natural gas to ensure that the natural gas can completely excite the self heat value of the phosphorus-containing waste liquid under the condition of sufficient combustion air distribution, performing combustion conversion reaction by utilizing the self heat value, and turning the phosphorus-containing waste liquid into a solid product after the combustion conversion, falling and collecting the solid product, wherein the method is specifically explained by the following embodiments 1-3:
the first embodiment is as follows:
inputting natural gas by a natural gas spray gun in the internal mixing type combustor, igniting and combusting through an ignition source, and simultaneously supporting combustion through air supply of a centralized air supply pipeline at 500 Nm/h under the condition of the natural gas input amount of 300 Nm/h;
when the temperature is increased to 600 ℃, the combustion air distribution of the centralized air supply is increased to 1400 Nm/h, the pressure of the atomizing gas is controlled to be 0.3MPa, the flow of the atomizing gas is 120 Nm/h, and the flow of the input phosphorus-containing waste liquid is 1.5m for cultivation;
when the temperature rises to 760 ℃, gradually increasing the combustion air distribution amount of the centralized air supply to 2000 Nm/h, and increasing the flow of the input phosphorus-containing waste liquid to 2.5m for cultivation/h;
when the combustion conversion temperature is in an ascending trend, gradually reducing the input amount of the natural gas to 116 Nm/h, and stopping reducing the input amount of the natural gas after the temperature is stabilized at 760 ℃;
collecting crude sodium pyrophosphate converted from phosphorus-containing waste liquid by combustion, analyzing that the content of the crude sodium pyrophosphate is 88.36%, the conversion rate of the product is 39.5%, and each ton of the crude sodium pyrophosphate consumes 77.33 Nm/t of natural gas.
Example two:
and a natural gas spray gun in the internal mixing type combustor inputs natural gas, and ignition combustion is carried out through an ignition source.
When the temperature rises to 600 ℃, the combustion air distribution of the centralized gas supply is improved to 1600 Nm/h, the pressure of the atomizing gas is controlled to be 0.35MPa, and the flow of the atomizing gas is 150 Nm/h, and the flow of the input phosphorus-containing waste liquid is 2.0m for cultivation.
Gradually increasing the combustion air distribution amount of the centralized air supply to 2400 Nm/h when the temperature rises to 760 ℃, and increasing the flow of the input phosphorus-containing waste liquid to 3.0m for cultivation/h;
when the combustion conversion temperature is in an ascending trend, gradually reducing the input amount of the natural gas to 139 Nm/h, and stopping reducing the input amount of the natural gas after the temperature is stabilized at 760 ℃;
and collecting crude sodium pyrophosphate converted from the phosphorus-containing waste liquid by combustion, analyzing that the content of the crude sodium pyrophosphate is 89.28%, and the conversion rate of the product is 40.1%, wherein each ton of the crude sodium pyrophosphate consumes 77.22 Nm/t of natural gas.
Example three:
and a natural gas spray gun in the internal mixing type combustor inputs natural gas, and ignition combustion is carried out through an ignition source.
When the temperature rises to 600 ℃, the combustion air distribution of the centralized gas supply is improved to 1600 Nm/h, the pressure of the atomizing gas is controlled to be 0.4MPa, and the flow of the atomizing gas is 180 Nm/h, and the flow of the input phosphorus-containing waste liquid is 2.0m for cultivation.
And when the temperature rises to 760 ℃, gradually increasing the combustion air distribution amount of the centralized air supply to 2720 Nm/h, and increasing the flow of the input phosphorus-containing waste liquid to 3.5 m/h for cultivation.
And when the combustion conversion temperature is in an ascending trend, gradually reducing the input amount of the natural gas to 148 Nm/h, and stopping reducing the input amount of the natural gas after the temperature is stabilized at 760 ℃.
And collecting crude sodium pyrophosphate converted from the phosphorus-containing waste liquid by combustion, analyzing that the content of the crude sodium pyrophosphate is 88.67%, and the product conversion rate is 41.5%, wherein 77.08 Nm/t of natural gas is consumed by each ton of the crude sodium pyrophosphate.
In the above three embodiments, the atomization of the atomizing gas is to break up the phosphorus-containing waste liquid into phosphorus-containing waste liquid fog drops through the atomizing holes of the phosphorus-containing waste liquid atomizing spray gun, the particle size of the phosphorus-containing waste liquid is 60-300 μm, and the source of the atomizing gas is a gas with pressure, such as a series of gases with pressure, such as compressed air, steam, nitrogen, and the like; the air supply source of the centralized air supply pipeline 2 is a series of gas conveying machines such as a ventilator, a blower or a compressor.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (5)
1. A method for preparing crude sodium pyrophosphate by efficiently burning and converting phosphorus-containing waste liquid is characterized by comprising the following steps:
the natural gas that the input used 300Nm year/h as the benchmark in the natural gas conveying pipeline of the interior mixed type combustor that constitutes by natural gas conveying pipeline (1), coaxial suit concentrated air feed pipeline (2) outside the natural gas conveying pipeline and the equipartition was concentrated air feed pipeline (2) outlying many phosphorus-containing waste liquid atomizing spray guns (5), make the natural gas spray gun burn through the ignition source, corresponding air feed 500 Nm year/h through concentrated air feed pipeline carries out combustion-supporting under the natural gas input volume condition with 300Nm year/h as the benchmark simultaneously, and set for according to following condition respectively:
A. when the combustion temperature is increased to 600 ℃, the air distribution amount of the air supply is increased by 1000 & lt- & gt 2000 Nm/h, then the phosphorus-containing waste liquid atomizing spray gun is started, the input flow of the atomizing gas is increased to 120 & lt- & gt 180 Nm/h, and the continuous input flow of the phosphorus-containing waste liquid is increased to 0.8-2.0m during cultivation;
B. when the combustion temperature is increased to 760 ℃, continuing increasing the air distribution amount of the air supply to 2000 and 3000 Nm/h, and carrying out cultivation under conditions that the input flow of the phosphorus-containing waste liquid atomizing spray gun is 2.0-3.7 m/h;
C. when the burning temperature shows a rising trend of 10-30 ℃/min continuously for 10min, the burning temperature is maintained between 760 ℃ and 780 ℃ by gradually reducing the input amount of natural gas.
2. The method for preparing crude sodium pyrophosphate by the efficient combustion conversion of the phosphorus-containing waste liquid according to claim 1, which is characterized by comprising the following steps: and C, stopping reducing the input amount of the natural gas when the combustion temperature does not continuously rise between 760 ℃ and 780 ℃ and the combustion is continuously performed for 20min in a stable trend.
3. The method for preparing crude sodium pyrophosphate by the efficient combustion conversion of the phosphorus-containing waste liquid according to claim 1 or 2, which is characterized by comprising the following steps: in the step A, the atomization of the atomization gas is to break up the phosphorus-containing waste liquid into phosphorus-containing waste liquid fog drops through the atomization holes of the phosphorus-containing waste liquid atomization spray gun, and the particle size of the phosphorus-containing waste liquid atomization is 60-300 microns.
4. The method for preparing crude sodium pyrophosphate by the efficient combustion conversion of the phosphorus-containing waste liquid according to claim 3, which is characterized by comprising the following steps: in the step A, the source of the atomizing gas is a gas with pressure.
5. The method for preparing crude sodium pyrophosphate by the efficient combustion conversion of the phosphorus-containing waste liquid according to claim 4, which is characterized by comprising the following steps: the air supply source of the concentrated air supply pipeline (2) is a ventilator, a blower or a compressor.
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| CN111928271A (en) * | 2020-08-11 | 2020-11-13 | 华中科技大学 | Combustor of organic waste liquid incinerator and combustion method thereof |
| CN112856438A (en) * | 2021-01-18 | 2021-05-28 | 煤科院节能技术有限公司 | Organic waste liquid combustion processor and use method thereof |
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Application publication date: 20211217 |