CN211871816U - Kitchen waste salt reducing device - Google Patents
Kitchen waste salt reducing device Download PDFInfo
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- CN211871816U CN211871816U CN201922273659.5U CN201922273659U CN211871816U CN 211871816 U CN211871816 U CN 211871816U CN 201922273659 U CN201922273659 U CN 201922273659U CN 211871816 U CN211871816 U CN 211871816U
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- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
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Abstract
The utility model discloses a kitchen waste salt reducing device, which is characterized by comprising a feeding bin with a feeding hole, wherein a first discharge hole at the bottom of the feeding bin is communicated with a stirring device, a spray hole communicated with a leaching solution box is arranged above the stirring device, the leaching solution box is communicated with a desulfurized gypsum bin, a polyacrylamide bin and an external tap water pipe, a second discharge hole at the bottom of the stirring device is communicated with a centrifugal bin, and a third discharge hole is arranged at the bottom of a discharge bin; a plurality of sodium electrode probes are arranged in the feeding bin and the discharging bin, and each sodium electrode probe is connected withAnd a sodium ion concentration display is connected. The utility model utilizes Ca in the desulfurized gypsum2+To exchange Na+、SO4 2‑Exchange of Cl‑The kitchen waste is separated from the brine through the centrifugal action under the flocculation action of polyacrylamide, the salt content in the kitchen waste is reduced, the potential salt toxicity of the kitchen waste is minimized by the pretreatment, and the reserved Ca and S are medium-amount nutrient elements required by plant growth.
Description
Technical Field
The utility model relates to a reduce device of salinity content among kitchen garbage. Belongs to the field of solid waste treatment and land recycling.
Background
The organic waste land recycling has already formed an important environmental protection industry in developed countries such as Europe and America and has positive significance for promoting energy conservation and emission reduction and improving the regional ecological environment. With the improvement of the requirements on ecological environment and the development of the concept of circular economy development in China, the organic waste land recycling has formed a consensus. Domestic waste is the main organic waste of human activities, and the Ministry of housing and construction commands No. 157 Commission of municipal domestic waste management to put forward the treatment and implementation of reduction, reclamation and harmlessness of municipal domestic waste. The kitchen waste is used as important household waste and mainly comes from various organic wastes of kitchens, and in view of the dietary habits of Chinese people, the kitchen waste in China has generally high salt content and is a main obstacle factor for land utilization. The content of salt in many kitchen wastes in China is reported to be as high as 30mS/cm (measured by a water saturation extraction method, the same below), and is far higher than the highest limit value of organic waste land utilization <12mS/cm in the national standard organic matrix for greening (GB/T33891-. The main harmful substances to the land utilization in the salt content of the kitchen waste are sodium ions and chloride ions, the concentration of soluble sodium ions and chloride ions of a plurality of kitchen waste is more than 7000mg/L, and the limit standards of 'organic matrix for greening' on the land utilization of organic waste are that the soluble sodium is less than 1500mg/L and the soluble chloride is less than 1000 mg/L. Although chlorine is also a nutrient element required by plant growth, the chlorine content of soil is required to be lower than 180mg/L (water saturated leaching) in the greening planting soil; exchangeable sodium is required to be less than 120 mg/kg. The excessive sodium and chlorine contents not only can cause soil salinization and structural dispersion, but also can cause phytotoxicity. The biggest obstacle of the land utilization of the kitchen waste is high salt content, particularly the content of sodium and chlorine exceeds the standard, so that the first problem of the land utilization of the kitchen waste is to reduce the salt content, particularly the content of sodium and chlorine.
Based on the restriction of the salt content on the land utilization of the kitchen waste, the research and development of related patents are also paid attention. For example, in the treatment method for desalting and desalting kitchen waste and then recycling the kitchen waste (CN201310418533.7), salt is ionized and converted into substances such as sodium hypochlorite and the like by heating and adding an acidic medium to adjust the pH value, so that the desalting effect is achieved, wherein sodium hypochlorite can oxidize long bacteria, short bacteria and other impurities in the swill together to generate other harmless molecules, and the finally obtained natural fertilizer can be recycled. This method is theoretically possible, but practical application has drawbacks. Firstly, the process is complicated, and the heating energy consumption is severe; in addition, an acidic medium is additionally added to adjust the pH value to electrolyze the salt in the kitchen waste to form sodium hypochlorite, so that the nutrients and the physicochemical properties in the kitchen waste subjected to electrolytic treatment can be greatly changed, and the quality of various nutrients with land utilization value in the kitchen waste can be directly influenced; and the new substance for generating sodium hypochlorite has unclear influence on nutrients and physicochemical properties in the kitchen waste.
For another patent, a microbial cell system for removing salt from kitchen waste (CN109370884A) is connected to a sample cell via a microbial cell via a sample inlet pipeline and a sample outlet pipeline, and a cathode and an anode of a battery power supply are connected to a cathode and an anode of the microbial cell respectively to achieve the purpose of removing salt. The utility model discloses an solved that traditional desalination device structure is complicated, new composition can not be introduced to the desalination in-process, does not produce advantages such as impurity. However, the cathode and the anode of the microbial battery are used for adsorbing sodium ions and chloride ions in the kitchen waste, and the kitchen waste, particularly the waste after meal with high salt content and high content of other nutrient ions, can also adsorb other nutrient ions when the electrodes adsorb the sodium ions and the chloride ions, and still has influence on the land recycling of the kitchen waste; moreover, sodium and chlorine are monovalent ions, and the electrode has relatively weak adsorption capacity, so that the practical application effect is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the kitchen waste has high salt content, and the prior desalting process has poor effect.
In order to solve the technical problem, the utility model provides a kitchen waste desalting device which is characterized by comprising a feeding bin with a feeding hole, wherein a first discharge hole at the bottom of the feeding bin is communicated with a stirring device, a spray hole communicated with a leaching solution box is arranged above the stirring device, the leaching solution box is communicated with a desulfurized gypsum bin, a polyacrylamide bin and an external tap water pipe, a second discharge hole at the bottom of the stirring device is communicated with a centrifugal bin, and a third discharge hole is arranged at the bottom of a discharge bin; a plurality of sodium electrode probes are arranged in the feeding bin and the discharging bin, and each sodium electrode probe is connected with a sodium ion concentration display.
Preferably, the sodium ion concentration display is provided with display windows corresponding to the sodium electrode probes one to one.
Preferably, the left side and the right side of the feeding bin are respectively provided with a sodium electrode probe, and the bottom of the feeding bin is uniformly provided with 3 sodium electrode probes; the top equipartition of going out the feed bin has 2 sodium electrode probes, and the bottom equipartition has 3 sodium electrode probes.
Preferably, still be connected with the desulfurization gypsum addition correction appearance between sodium electrode probe in the feeding storehouse and the sodium ion concentration display, be equipped with sodium ion concentration average value display window, kitchen garbage volume display window, desulfurization gypsum addition display window in the feeding storehouse on the desulfurization gypsum addition correction appearance respectively.
Preferably, the desulfurized gypsum bin is provided with a desulfurized gypsum feeding switch for controlling the feeding of the desulfurized gypsum; and a polyacrylamide feeding switch for controlling feeding of polyacrylamide is arranged on the polyacrylamide bin.
Preferably, the desulfurized gypsum feed switch is a quantitative switch, and the amount of the desulfurized gypsum feed switch corresponds to the amount of the desulfurized gypsum feed switch to be replaced in the kitchen waste in the feed bin when the content of sodium ions is less than 2000mg/L, namely when the content of sodium ions is less than 2000mg/L, the desulfurized gypsum feed switch is pressed for 1 time; when the content of sodium ions is 2000-3000 mg/L, switching on and off the desulfurized gypsum feeding for 2 times; when the content of sodium ions is 3000-4000 mg/L, switching on and off the feeding of the desulfurized gypsum for 3 times; when the content of sodium ions is 4000-5000 mg/L, switching on and off the feeding of the desulfurized gypsum for 3 times; when the content of sodium ions is more than 5000mg/L, the sodium ions are directly used as waste for landfill due to the fact that the sodium ions are not suitable for land utilization; the polyacrylamide feeding switch is also a quantitative switch, and the set amount is that the adding volume of polyacrylamide is 0.25% of the inner volume of the leaching solution box.
Preferably, a stirring rod is arranged in the stirring device.
Preferably, a reclaimed water pipeline switch is arranged on the reclaimed water pipeline.
Preferably, the leaching solution box is further sequentially connected with a reclaimed water storage tank, a waste water purification tank, a centrifugal bin and a discharge bin through a reclaimed water pipeline, an inlet of the waste water purification tank is connected with the upper part of the centrifugal bin, a biochar adsorption membrane is arranged at an outlet, and a pair of anion electrode and cation electrode is arranged between the inlet and the outlet.
Preferably, the kitchen waste sequentially enters the feeding bin and the stirring device, the desulfurized gypsum feeding switch and the polyacrylamide feeding switch are sequentially started, the desulfurized gypsum and the polyacrylamide are added into the leacheate tank, and then an external tap water pipe or a water pipe switch is opened to dilute the desulfurized gypsum and the polyacrylamide; the kitchen waste enters the stirring device from the discharge port I, the spraying port and the stirring device are opened, and the desulfurized gypsum and the kitchen waste are mixedMixing and replacing Na in the kitchen waste+And Cl-(ii) a Opening agitating unit's discharge gate two, in the kitchen garbage that has fully reacted with the desulfurization gypsum gets into centrifugal storehouse, kitchen garbage after the desulfurization gypsum exchange is under centrifugation and polyacrylamide's flocculation, salt solution and kitchen garbage thoroughly separate, wherein, solid kitchen garbage gets into out the feed bin, detects out the concentration of sodion in the feed bin, if up to standard, then by the three ejection of compact of discharge gate, if not up to standard, then get into the feeding storehouse again and repeat aforementioned step until up to standard.
The utility model discloses not simple follow the principle that does not additionally add the composition in kitchen garbage processing process, but to the demand characteristics of plant to soil nutrient and useful element start, the sodium that the kitchen garbage land utilization exists of having dinner, the high main obstacle factor of chloride ion content, borrow from sodium, the high saline and alkaline land soil improvement of chloride ion content is with desulfurization gypsum often, the principle of two kinds of commonly used soil improvement agents of soil structure improvement modifier polyacrylamide commonly used, directly add desulfurization gypsum and polyacrylamide in kitchen garbage's preliminary treatment. Utilizing Ca in desulfurized gypsum2+To exchange Na+、SO4 2-Exchange of Cl-. The kitchen waste after the salinity replacement is separated from the salt water as far as possible under the flocculation action of polyacrylamide, the Na and Cl content in the kitchen waste is reduced, and the treatment can be repeatedly carried out until the salinity content of the kitchen waste reaches the limit value requirement of land utilization. The kitchen waste is pretreated, so that potential salt toxicity of the kitchen waste is minimized, the reserved Ca and S are medium-amount nutrient elements required by plant growth, and the land utilization value of the kitchen waste can be further improved by virtue of various improvement effects of the desulfurized gypsum and polyacrylamide on the soil. The treatment method has the advantages of low energy consumption, reasonable process design, economic and feasible cost and better practical application effect.
The desulfurization gypsum used by the utility model is also a byproduct produced in the flue gas desulfurization process of the coal-fired power plant, is a finely divided wet crystal, and is high-grade calcium sulfate dihydrate (CaSO)4·2H2O). The day and the sunCompared with gypsum, the desulfurized gypsum has the characteristics of high purity, stable components, small granularity, less harmful impurities and the like, and is the gypsum with better quality. The functions of the utility model are as follows: 1) for the soil lacking S and Ca, an S source and a Ca source can be provided, and the crop yield is improved; 2) adjusting the acidity of the soil at the lower layer, reducing the content of Al3+, and leading the root system of the plant to be deeper; 3) regulating Na in soil+The salinization degree of the soil is improved; 4) for the soil with high phosphorus content, phosphorus is fixed, the loss of phosphorus is reduced, and the water quality is improved; 5) can improve the physical and chemical structure of the soil and the water permeability of the soil. The utility model mainly utilizes Ca of the desulfurized gypsum2+And SO4 2-For Na+And Cl-Exchange function of (a); and the loss of nutrients can be reduced in the kitchen waste disposal or land utilization process. And the other big innovation of this patent is that the volume of the desulfurization gypsum that needs to add is calculated according to the amount of salinity content in the kitchen garbage, considers the improvement effect of desulfurization gypsum itself to soil, and the addition is estimated according to the upper limit of salinity content.
Polyacrylamide (PAM) is a linear organic high molecular polymer, can adsorb suspended particles in water, plays a role in bridging among the particles, enables fine particles to form larger floccules and accelerates the speed of precipitation; the polyacrylamide land utilization also has the functions of water retention, heat preservation, fertilizer retention, plant growth promotion and the like. The utility model discloses an aspect is the Na that utilizes polyacrylamide's flocculation, promotes kitchen garbage and replacement+And Cl-The brine is thoroughly separated, and meanwhile, the polyacrylamide has a structure conditioning effect on the kitchen waste, so that the land utilization value of the kitchen waste is improved.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. by using the principle that the desulfurized gypsum is used for improving the saline-alkali soil and the polyacrylamide is used for treating the wastewater and improving the soil structure, the desulfurized gypsum and the polyacrylamide are used for the kitchen waste, so that the salt can be reduced, the potential toxicity of the salt possibly existing in the land utilization of the kitchen waste can be reduced, the side effect on the kitchen waste is small, the nutrient content in the kitchen waste can be fixed, the soil structure can be improved, the soil macroelements (calcium and sulfur) can be increased, the acid-base balance of the soil can be ensured, the soil permeability can be increased and the like, the conditioning effect of increasing the land utilization value of the kitchen waste can be achieved, and the desulfurized gypsum and polyacrylamide conditioner is a salt reducing agent and a conditioner.
2. According to the salinity of the kitchen waste, the main Na is+And Cl-By using the measured Na+The kitchen waste is divided into a plurality of grades according to the concentration, so that scientific evaluation on the land utilization value of the kitchen waste is facilitated, whether the land utilization of the kitchen waste can be realized and whether the land utilization value reaches the standard is determined, the addition amount of the desulfurized gypsum is also conveniently determined, the pertinence is strong, the salt is scientifically and accurately reduced, excessive addition of extra substances is avoided, and the incomplete salt reduction of the kitchen waste is also prevented.
3. The desulfurization gypsum addition amount corrector calculates the amount of the desulfurization gypsum button pressed once according to the concentration of sodium ions, is convenient for practical operation and is simple and easy to implement.
4. The brine displaced by the desulfurization gypsum is purified and then reused for diluting the desulfurization gypsum, thereby increasing the reuse of the reclaimed water.
Drawings
Fig. 1 is a schematic view of a kitchen waste salt reducing device provided by the utility model;
FIG. 2 is a schematic view of a desulfurization gypsum addition amount corrector.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, for the utility model provides a kitchen waste desalting device, it includes feeding storehouse 1 with feed inlet 2, discharge gate one 7 and agitating unit 15 intercommunication of feeding storehouse 1 bottom, the top of agitating unit 15 is equipped with the shower nozzle 14 that communicates with drip washing liquid box 12, drip washing liquid box 12 communicates with desulfurized gypsum storehouse 8, polyacrylamide storehouse 10, external tap water pipe 13, discharge gate two and centrifugal storehouse 18 intercommunication of agitating unit 15 bottom, discharge gate three 20 is equipped with in the bottom of discharge storehouse 19; a plurality of sodium electrode probes 3 are arranged in the feeding bin 1 and the discharging bin 19, and each sodium electrode probe 3 is connected with a sodium ion concentration display 4. The sodium ion concentration display 4 is provided with display windows 5 which correspond to the sodium electrode probes 3 one by one.
The left side and the right side of the feeding bin 1 are respectively provided with a sodium electrode probe 3, and the bottom of the feeding bin is uniformly provided with 3 sodium electrode probes 3; go out the top equipartition of feed bin 19 and have 2 sodium electrode probe 3, the bottom equipartition has 3 sodium electrode probe 3. And a desulfurized gypsum addition amount corrector 6 is also connected between the sodium electrode probe 3 and the sodium ion concentration display 4 in the feeding bin 1, and the desulfurized gypsum addition amount corrector 6 is respectively provided with a sodium ion concentration average value display window 6-1 in the feeding bin, a kitchen waste volume display window 6-2 in the feeding bin and a desulfurized gypsum addition amount display window 6-3.
The desulfurized gypsum bin 8 is provided with a desulfurized gypsum feeding switch 9 for controlling the feeding of the desulfurized gypsum; the polyacrylamide bin 10 is provided with a polyacrylamide feeding switch 11 for controlling feeding of polyacrylamide. The desulfurized gypsum feed switch 9 is a quantitative switch, and the amount of the desulfurized gypsum corresponds to the amount of the desulfurized gypsum to be replaced in the kitchen waste in the feed bin 1 when the content of sodium ions is less than 2000mg/L, namely when the content of sodium ions is less than 2000mg/L, the desulfurized gypsum feed switch 9 is pressed for 1 time; when the content of sodium ions is 2000-3000 mg/L, a desulfurized gypsum feeding switch 9 is pressed for 2 times; when the content of sodium ions is 3000-4000 mg/L, a desulfurized gypsum feed switch 9 is pressed for 3 times; when the content of sodium ions is 4000-5000 mg/L, a desulfurized gypsum feed switch 9 is pressed for 3 times; when the content of sodium ions is more than 5000mg/L, the sodium ions are directly used as waste for landfill due to the fact that the sodium ions are not suitable for land utilization; the polyacrylamide feed switch 11 is also a quantitative switch, and the amount set is such that the volume of polyacrylamide added is 0.25% of the volume of the interior of the wash liquor tank 12.
A stirring rod 16 is arranged in the stirring device 15.
The reclaimed water pipeline 26 is provided with a reclaimed water pipeline switch 27.
The volume scale is arranged outside the feeding bin 1, and the volume V of the kitchen waste can be read1Unit m of3。
The desulfurization gypsum addition amount corrector 6 is provided with three buttons, and a sodium ion concentration average value display window 6-1 in the leftmost feeding bin shows 5 sodium electrode probes in the feeding binAverage of head-determined sodium ion concentration CNa+In mg/L; the kitchen waste volume display window 6-2 in the middle feeding bin displays the volume V of the kitchen waste in the feeding bin1Unit m of3(ii) a And the rightmost side is a desulfurized gypsum addition amount display window 6-3. The addition amount of the desulfurized gypsum is not estimated according to the mass or volume of the desulfurized gypsum which is added according to specific needs, and the conversion is completed by utilizing a self-contained computer program so as to obtain the desulfurized gypsum volume V of every time the desulfurized gypsum feed switch 9 is pressed2The method is estimated as a constant measurement unit, is convenient to apply in practical operation, and reduces the workload of manual conversion. When the sodium ions in the kitchen waste are used>At 5000mg/L, land utilization is generally not recommended and the waste is directly used as a waste landfill.
The desulfurized gypsum bin 8 is used for storing desulfurized gypsum in advance, wherein the desulfurized gypsum feed switch 9 is used for converting the amount V of the desulfurized gypsum to be added according to the content of sodium ions2The content of sodium ions can be replaced by pressing each time
<2000mg/L of kitchen waste with a feeding bin 1 full of bins. Wherein V2The calculation format of (1) is: v2＝0.5×[CNa+×V1×1000÷58.44×172]÷T1÷T2Wherein T is1Representing the water conversion coefficient of the desulfurized gypsum; t is2Represents the content of calcium sulfate in the desulfurized gypsum. C is to beNa+Is arranged as<2000mg/L, 2000-300 mg/L, 3000-4000 mg/L, 4000-5000 mg/L and>5000mg/L five-grade. Considering that the desulfurized gypsum is beneficial to soil improvement, the sodium ion content of different sections is calculated by taking the highest value:<2000mg/L, according to a one-time desulfurized gypsum feed switch 9, namely V2(ii) a 2000-3000 mg/L, 2 times of desulfurized gypsum feeding switch 9, namely 2V2(ii) a 3000-4000 mg/L, and 3 times of desulfurized gypsum feeding switch 9, namely 3V2(ii) a 4000-5000 mg/L, and switching on and off 9 according to 4 times of desulfurized gypsum, namely 4V2；>5000mg/L generally does not suggest land use and is directly landfilled as waste.
The above-mentioned conversion is desulfurized gypsum addition amount calibrator 6, then, when the average content of sodium of the kitchen waste measured by sodium ion electrode 3 in the feeding bin 1 is less than 2000mg/kg, press desulfurized gypsum feed switch 9 once; when the average sodium content of the kitchen waste is measured to be 2000-300 mg/kg, switching on and off a desulfurized gypsum feeding switch 9 for 2 times; when the average sodium content of the kitchen waste is measured to be 3000-4000 mg/kg, feeding a switch 9 according to 3 times of desulfurized gypsum; when the average sodium content of the kitchen waste is measured to be 4000-5000 mg/kg, feeding a switch 9 according to the desulfurized gypsum for 4 times; when the average content of sodium in the measured kitchen waste is more than 5000mg/kg, the kitchen waste is recommended to be directly landfilled as waste due to the fact that the content of sodium ions in the kitchen waste is too high, and the necessity of land utilization and disposal is avoided.
The polyacrylamide bin 10 is used for storing polyacrylamide, and the amount of the polyacrylamide feeding switch 11 is about 0.25% of the volume concentration of the leaching solution box 12 after being pressed once. The amount is controlled mainly to enhance the flocculation of the kitchen waste and to separate the brine from the replaced kitchen waste as much as possible. The amount of polyacrylamide in the polyacrylamide feed switch 11 per press is 1000X 0.25%. times.VLeaching liquid box。
When the kitchen waste enters the feeding bin 1, the sodium ion concentration is obtained, and the amount of the desulfurized gypsum required to be added is obtained from the sulfur gypsum addition amount corrector 6, the desulfurized gypsum feeding switch 9 and the polyacrylamide feeding switch 11 are started in sequence, the desulfurized gypsum and the polyacrylamide are added into the leaching solution tank 12, and then the diluted desulfurized gypsum and the polyacrylamide are diluted by water. The first water can be externally connected with a tap water pipe 13, the subsequent water can be the brine exchanged by the leacheate, the purified reclaimed water can be reused, and when water needs to be fed, a reclaimed water pipe switch 27 is started.
When the kitchen waste enters the stirring device 15 from the first discharge hole 7, the spraying hole 14 and the stirring rod 16 are opened, the desulfurized gypsum containing different concentrations is fully exchanged with the kitchen waste to replace Na in the kitchen waste+And Cl-The stirring time can be empirically accumulated, and is generally at least 5 minutes or more.
Opening the second discharge port 17 of the stirring device 15, allowing the kitchen waste fully exchanged with the desulfurized gypsum to enter the centrifugal bin 18, and completely separating the salt water from the kitchen waste under the flocculation action of centrifugation and polyacrylamide. Wherein, the dry matter-kitchen waste enters a discharge bin 19, the average value of 5 sodium ion electrodes of the discharge bin 19 is less than 1500mg/L, the salt content of the kitchen waste is considered to reach the standard of land utilization, and the kitchen waste directly enters the subsequent treatment of the land utilization of the kitchen waste through a discharge port III 20. If the content of sodium ions in the discharging bin 19 measured by the sodium ion concentration display 4 is more than 1500mg/L, the content of sodium ions in the kitchen waste still exceeds the standard, the kitchen waste discharged from the discharging port III 20 needs to enter the feeding bin 1 again and then enter the stirring device 15, and is stirred with the desulfurized gypsum until the content of sodium ions in the kitchen waste discharged from the discharging bin is less than 1500mg/L, so that the kitchen waste can be used for post-treatment of land utilization.
The salt water separated from the centrifugal bin 18 enters a wastewater purification tank 21, and an anion electrode 23 on the salt water can adsorb Na in the wastewater+And the lower cation electrode 22 can adsorb Cl in the wastewater-. Na in wastewater+And Cl-After being adsorbed by the cathode and the anode respectively, the brine is further purified by the biochar adsorption film 24 finally to reach the discharge standard of reclaimed water. In order to improve the utilization rate of the reclaimed water, the reclaimed water can be stored in the reclaimed water storage tank 25 for waiting to be reused. Normally, when the reclaimed water pipeline switch 27 is opened, reclaimed water enters the leaching solution tank 12 through the pipeline 26 and is stirred and mixed with the desulfurized gypsum and the polyacrylamide to form leaching solution for leaching the kitchen waste for later use. The reclaimed water in the reclaimed water storage tank 25 can also be used for other forms of reclaimed water reuse.
Example 1
The method is characterized in that the kitchen waste in a certain community needs to be reused in land, but the salt content exceeds the standard, and the salt reduction treatment is needed, and the method mainly comprises the following steps:
the kitchen waste enters the feeding bin 1 from the feeding hole 2, a row of buttons on the sodium ion concentration display 4 are respectively opened, and the sodium ion readings of the 5 sodium electrode probes 3 in the corresponding feeding bin 1 are respectively 3189mg/L, 3467mg/L, 3281mg/L, 2974mg/L and 3056 mg/L. The sodium ion concentration average value display window 6-1 in the leftmost feeding bin of the desulfurization gypsum addition amount corrector 6 displays the sodium ion concentration average value measured by 5 sodium electrode probes in the feeding bin 1CNa+3193 mg/L; kitchen waste volume display window 6-2 in feeding bin displays V1＝3.5m3(ii) a Displaying volume V of kitchen waste in feeding bin1Unit m of3(ii) a The rightmost desulfurized gypsum addition amount display window 6-3 shows the number 2.
According to the desulfurization gypsum addition display window 6-3, the desulfurization gypsum estimated by a computer enters the leaching solution box 12 from the desulfurization gypsum bin 8 according to the desulfurization gypsum feeding switch 9 for 2 times; the polyacrylamide button is pressed 111 times to bring the polyacrylamide from the polyacrylamide bin 10 into the rinse solution tank 12. And opening a reclaimed water pipeline switch 27 to pour reclaimed water into the leaching solution box 12, and fully stirring and diluting the desulfurized gypsum and the polyacrylamide for later use.
As the sodium ion concentration average value display window 6-1 in the feeding bin displays C of the kitchen waste in the feeding binNa+3193mg/L, the kitchen waste can be used in land, so start discharge gate 7, when getting into agitating unit 15 with kitchen waste, open the spraying mouth 14 and the stirring rod 16 of leacheate, carry out abundant exchange with desulfurization gypsum leacheate and kitchen waste, stir more than 5 minutes. And opening a second discharge port 17 of the stirring device 15, and feeding the treated kitchen waste into a centrifugal bin 18. Wherein, dry matters of the kitchen waste enter the discharging bin 19, 5 sodium ion content measuring buttons of the discharging bin 19 next to the sodium ion concentration display 4 are started, and the sodium ion content respectively displayed is 221mg/L, 223mg/L, 211mg/L, 206mg/L and 198 mg/L; the average content of sodium ions is 212mg/L, which is far less than the sodium ion content required by organic waste land utilization<The limit value of 1500mg/L, the goal of reducing salt is achieved. And opening a third discharge hole 20, and reducing the well-treated kitchen waste for subsequent treatment of aerobic composting.
The salt water separated out by the centrifugal bin weight 18 enters a wastewater purification tank 21, and Cl is respectively adsorbed by a cation electrode 22 and an anion electrode 23-And Na+And further purification of the biochar adsorption membrane 24 to ensure that the brine meets the discharge standard of reclaimed water, is stored and is waited for reuse in a reclaimed water storage tank 25 or used for other purposes.
Claims (9)
1. A kitchen waste salt reducing device is characterized by comprising a feeding bin (1) with a feeding port (2), wherein a first discharging port (7) at the bottom of the feeding bin (1) is communicated with a stirring device (15), a spraying port (14) communicated with a leaching solution box (12) is arranged above the stirring device (15), the leaching solution box (12) is communicated with a desulfurized gypsum bin (8), a polyacrylamide bin (10) and an external tap water pipe (13), a second discharging port at the bottom of the stirring device (15) is communicated with a centrifugal bin (18), and a third discharging port (20) is arranged at the bottom of a discharging bin (19); a plurality of sodium electrode probes (3) are arranged in the feeding bin (1) and the discharging bin (19), and each sodium electrode probe (3) is connected with a sodium ion concentration display (4).
2. The kitchen waste salt reducing device according to claim 1, characterized in that the sodium ion concentration display (4) is provided with display windows (5) corresponding to the sodium electrode probes (3) one by one.
3. The kitchen waste salt reduction device according to claim 1, wherein the left side and the right side of the feeding bin (1) are respectively provided with a sodium electrode probe (3), and the bottom of the feeding bin is uniformly provided with 3 sodium electrode probes (3); go out the top equipartition of feed bin (19) and have 2 sodium electrode probe (3), the bottom equipartition has 3 sodium electrode probe (3).
4. The kitchen waste salt reducing device according to claim 1, wherein a desulfurized gypsum addition amount corrector (6) is further connected between the sodium electrode probe (3) and the sodium ion concentration display (4) in the feeding bin (1), and the desulfurized gypsum addition amount corrector (6) is respectively provided with a sodium ion concentration average value display window (6-1) in the feeding bin, a kitchen waste volume display window (6-2) in the feeding bin, and a desulfurized gypsum addition amount display window (6-3).
5. The kitchen waste salt reduction device according to claim 1, characterized in that the desulfurized gypsum bin (8) is provided with a desulfurized gypsum feed switch (9) for controlling the feeding of desulfurized gypsum; the polyacrylamide bin (10) is provided with a polyacrylamide feeding switch (11) for controlling feeding of polyacrylamide.
6. The kitchen waste salt reduction device according to claim 5, characterized in that the desulfurized gypsum feed switch (9) is a quantitative switch.
7. The kitchen waste salt reduction device according to claim 1, characterized in that a stirring rod (16) is arranged in the stirring device (15).
8. The kitchen waste salt reduction device according to claim 1, wherein the rinsing liquid tank (12) is further connected with a reclaimed water storage tank (25), a waste water purification tank (21), a centrifugal bin (18) and a discharge bin (19) in sequence through a reclaimed water pipeline (26), an inlet of the waste water purification tank (21) is connected with the upper part of the centrifugal bin (18), an outlet is provided with a biochar adsorption membrane (24), and a pair of anion electrode (23) and cation electrode (22) is arranged between the inlet and the outlet.
9. The kitchen waste salt reducing device according to claim 8, characterized in that a reclaimed water pipeline switch (27) is arranged on the reclaimed water pipeline (26).
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|---|---|---|---|
| CN201922273659.5U CN211871816U (en) | 2019-12-17 | 2019-12-17 | Kitchen waste salt reducing device |
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| CN201922273659.5U CN211871816U (en) | 2019-12-17 | 2019-12-17 | Kitchen waste salt reducing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922222A (en) * | 2019-12-17 | 2020-03-27 | 上海绿地环境科技(集团)股份有限公司 | Kitchen waste salt reducing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922222A (en) * | 2019-12-17 | 2020-03-27 | 上海绿地环境科技(集团)股份有限公司 | Kitchen waste salt reducing device |
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