JP2007021469A - Production method for removing harmful matter in sewer sludge and recycling sewer sludge as general soil of green farmland and the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove harmful matter in sewer purified sludge, and to recycle the sludge as general soil such as green farmland materials in multiple purposes. <P>SOLUTION: A superconducting non-liquid cooling medium type high gradient electromagnetic separator 3 is used, the harmful matter part of sludge is subjected to magnetic separation, so as to produce purified sludge, and the sludge is recycled as general soil for many purposes in green farmland materials or the like. Further, exhausted sewage is purified using an instantaneous flocculant, and is made into perfect clear water by a purification apparatus. The clear water is widely utilized as industrial water, construction water, road water for preventing a heat island, water for a flush toilet, water for agricultural/horticultural use, river water, water for the other miscellaneous use, and, finally, drinking water, and is recycled in the securance of water resources and the contribution where attention is payed for the environment. The harmful matter is treated as future resource securance. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

It is a method for producing a cleaned green farmland soil day mud that can remove heavy metals and other harmful substances from sewage sludge (hereinafter referred to as sludge) and can be recycled as general soil.
[Technical background]

Sludge treatment is concentrated, anaerobically digested, dehydrated, dried, composted or incinerated, fired, etc., green farmland (soil improvement material) or fired is backfilled, brick, pavement and other construction materials or dehydrated The inland landfill, sea surface landfill, and part of the liquid sludge are returned to the ocean, but in most cases, removal of heavy metals and other harmful substances is not performed. For this reason, even though it is a good quality green farmland material, it is one of the reasons why its use does not spread and expand. For users, there is a strong demand for safe and secure sludge-treated products that do not contain heavy metals and other harmful substances.
[Disclosure of the Invention]
[Problems to be solved by the invention]

  In this way, the inland landfill disposal without completely detoxifying or recycling the sludge causes the problem of narrowing and expansion of the landfill site and the bad odor. And problems are occurring.

  In addition, sea surface treatment simply requires strong regulations and legal regulations from fishermen and environmental protection organizations.

To incineration is a substantial unnecessary expense and CO ₂ gas, such gas has become stricter one a is emission control is causing the global warming.

In utilizing sludge, in order to solve this problem, the present invention provides a processing technique for completely recycling as a safe and secure green farmland material by removing harmful substances.
[Means for solving problems]

  In order to solve the above-mentioned problems, the invention of claim 1 is to apply sludge to a strong magnetic field of a superconducting liquid-free high gradient electromagnetic separation device (hereinafter referred to as a dry magnet device) that removes the above-mentioned heavy metals and other harmful substances. It is a manufacturing method that passes through and removes harmful substances by adsorbing them to a magnetic field, and completely purifies the purified mud to green farmland materials.

  Since the present invention is concerned that new problems and treatments may not occur when the above-mentioned harmful substances are removed by a chemical method, the hazardous substances are not produced by using a physical method that does not cause pollution without using a chemical method. Is to be removed.

  As a method of physically removing harmful substances, electromagnetic waves are used by superconductivity, and the harmful substances are made to have a magnetic material and are removed by magnets.

  As a method of making harmful substances magnetic, a superconducting device generates several thousand to several tens of thousands of magnetic fluxes (Gauss), and the superconducting magnets are separated and supplemented with porcelain.

  The sludge to be purified uses a dry magnet device that falls below the soil pollution environment standard value, and the magnetic force of the generated magnetic field is from several thousand to several tens of thousands of gauss. The purified mud can be used as a green and green area material.

  Heavy metals and other harmful substances are attracted to the N pole magnetized by the porcelain separation in the porcelain separation chamber and do not leave until the magnetic field of the magnetic field disappears. Treat the removed harmful substances separately.

  Things that can be easily separated from porcelain include iron (Fe), cobalt (Co), and nickel (Ni). The Gaussian force that separates these objects from porcelain is easily possible in the order of thousands to tens of thousands.

  As weak magnetic particles that can be separated by porcelain but can be separated by relatively increasing the Gaussian force, only single particles are lithium (Li), sodium (Na), potassium (Ka), calcium (Ca), magnesium ( Mg), strontium (Sr), barium (Ba), scandium (Sc), lanthanum (La), zircon (Zr), haonium (Hf), neodymium (Nd), aluminum (Al), lutetium (Lu), oxygen (O).

  Both the simple substance and the compound are weak magnetic particles, such as titanium (Ti), vanadium (V) chromium (Cr), manganese (Mn), yttrium (Y), molybdenum (Mo), tectium (Tc), ruthenium (Ru). , Rhodium (Rh), lead (Pb), tantalum (Ta) tungsten (Ta), rhenium (Re), osmium (Os), iridium (Ir) platinum (Pt), cerium (Ce), praseosium (Pr), neodymium (Nd), Samarium (Sm), Europeme (Eu), Cadmium (Cd), Terbium (Tb), Desplatium (Dy), Holmium (Ho), Erbium (Er), Thulium (Tm uranium (U), There are plutonium (Pu) and americium (Am).

  Non-metallic particles such as chlorine (Cl), silicon (Si), phosphorus (P), sulfur (S), carbon (C), nitrogen (N), boron (B), fluorine (F), arsenic (Ad) , Selenium (Se), bromine (Br), tellurium Te) iodine (I), astatine (At), neon (Ne), argon (Ar), xenon (Kr), krypton (Kr), xenon (Xe), radon (Rn). These materials can also be separated by increasing the Gaussian force from tens of thousands to hundreds of thousands.

  Regarding claim 2, as a device for removing harmful substances described in claim 1, it is a fluid activation apparatus using Faraday's law of electromagnetic induction, and passes through a magnetic field magnetized through sludge containing harmful substances. By doing so, harmful substances are adsorbed on the N pole by the action of the magnet due to porcelain separation, and mud and organic substances pass through. FIG.

  In order to allow the sludge to pass through the magnetic field smoothly, it is preferable that the sludge contains moisture, and the flow rate is preferably 95% or more, and the Gaussian force is applied when the sludge fluid that allows natural convection passes through the magnetic field. However, it is preferable to have a moisture content that is radiated to a maximum.

  In order to enable continuous operation, two of these devices are installed in parallel, and when the harmful substance removal capacity reaches a specified amount, the device is stopped to remove harmful substances. Thereafter, the same work is alternately performed in order to remove harmful substances. FIG.

  As a method for removing harmful substances adsorbed on the N pole, after the apparatus is stopped, the powdered sludge state substances adsorbed on the side surface are manually scraped off or the substances adsorbed on the filter are removed.

  The material of the filter is preferably a material that can withstand a high gradient magnetic field and is easily magnetized, and most preferably a steel material. However, when a high gradient magnetic field is not required, it does not have to be of high quality.

  When the amount of harmful substances adsorbed on the filter reaches the specified value, the equipment is stopped, the filter is taken out, and the final disposal is done with the adsorbed harmful substances, and replaced with a new filter.

  About claim 3, about purification of sludge water generated by dehydration at the time of centrifugal separation with a dry magnet device, it is purified using an instantaneous flocculant to discharge the polluted water discharged, and the water quality standard value is discharged. Is.

  This is a method to purify the polluted water generated continuously and to completely recycle the purified water that has been reduced to the standard value or less depending on the application.

  For clear water recycling, various industrial water such as own factories, road / park water, flush toilet water, pond water, agricultural / horticultural water, agricultural water, other industrial wastewater, construction / building water, It will be used as drinking water for humans and animals, such as river water.

  The clarified water is finally kept within the standard value of tap water that can be used as drinking water, and in order to make it drinking water, chlorine gas from sodium chloride or liquid chlorine cylinders is used to sterilize tap water in the Waterworks Law. From the injection to the end, tap water can be used by containing residual chlorine of 0.1 mg / l or more (0.4 mg / l in the case of combined residual chlorine) in tap water.

About Claim 4, it is an installation for completely recycling the polluted water of Claim 3. This apparatus performs the treatment of polluted water in a short time using an instantaneous flocculant, and the equipment can be downsized because it can be processed in a short time. Since this apparatus can cope with all kinds of polluted water, it is widely used.
[The invention's effect]

Since the present invention can utilize the sewer sludge that has been disposed of without any utilization method in all fields, the narrow life extension of the final disposal site of the sewer sludge and the securing of new land at the time of narrowing will be eliminated, and the cost of the disposal site It can lead to reduction. In addition, sludge can be used and new businesses and employment can be created.
[Best Mode for Carrying Out the Invention]

  The present invention is a method for removing substances adsorbed on the N pole by electromagnetically separating sludge harmful substances by superconductivity using Faraday's law of electromagnetic induction without using a chemical technique for the hazardous substance removing method. It is. Details of the apparatus will be described below. FIG.

  About Claim 1, the dry magnet apparatus which does not use liquid helium using a high temperature superconductor is used. Since this apparatus is a liquid-free refrigerant type, it is possible to reduce the scale of the substance recovery apparatus for separating the porcelain.

  As the first step, when the sludge is flowed into the device for electromagnetic separation, the dry magnet device is rotated and centrifuged to change the state of the liquid to a mist-like state. At the same time that the magnetic field lines are radiated from the magnetic field of the magnet device, the inside of the device is rotated and centrifuged, and a centrifugal force is applied to the sludge so that harmful substances electromagnetically separated to the N pole are adsorbed to the recovery filter.

  The centrifugal force applied to the rotating device in the first step varies depending on the target sludge, so that the applied force is appropriately adjusted and controlled.

  Although the Gaussian force of the magnetic separation lines of electromagnetic separation in the second step varies depending on the object to be processed, an apparatus that generates Gaussian force of several thousands to several tens of thousands to 100,000 is preferable.

  The collection method of the collection filter has a structure that allows the slide filter to be discharged out of the device with a single touch in order to prevent direct contact with the hand because harmful substances are contained in the collection filter at a high concentration. It is preferable to do.

  In order to collect the collection filter, the time interval for stopping or operating the dry magnet device is preferably as fast as possible, and in either case, it is set to about several minutes. There is also a natural stop method for rotating the dry magnet device, but with a stop braking device using a counter electromotive force, the stop time is shortened, so the work is performed smoothly.

  In order to improve the porcelain separation rate in the sludge that is electromagnetically separated in the second step, when the iron powder is mixed and stirred as a magnetic seeding agent in the pretreatment stage of the second step, The magnetizing force of the seeding agent increases the magnetizing force, and harmful substances can be easily removed from the sludge.

  About a dry magnet apparatus, continuous operation can be enabled by installing in parallel, and a sludge treatment amount can be mass-produced.

  As for claim 2, regarding the detailed configuration of the dry magnet device, the sludge that has been sprayed by the spiral sludge pulverization and stirring device (hereinafter referred to as the spiral device) after the sludge has been put into the sludge hopper is centrifuged for 5 times. The dehydrated material that has been electromagnetically separated in the tank and dehydrated on the wall surface 7 is scraped off by the rotary scraping device 6 and discharged to the discharge pipe 11, and at the same time, sprayed by the 2 spiral pulverization and stirring device When the sludge containing harmful substances becomes magnetized by the magnetic force generated by the strong magnetic field of 9, the harmful substances magnetized are decomposed by the strong magnetic force and are magnetically attached to the N pole of 9.

  Since the magnetized harmful substances will not be detached as long as the strong magnetic field generation of 9 continues, when the amount of harmful substances reaches the specified amount, the dry magnet device is stopped and the recovery filter is removed. Final disposal.

  It is the processing time until the final treatment of sludge containing harmful substances, but the sludge that has been sprayed after being put into the device 2 from 1 hopper is magnetized to 9 and the purified sludge is 5 The time required to discharge to the 11 discharge pipe by the operation of the spiral device of 6 is about 1 to several minutes, and the difference in the purification processing time depends on the sludge to be processed or the strength of the magnetic field generator that generates the magnetic force of 9 It will be different. Alternatively, the rotational force of the spiral device 6 is very high due to the strength of the stirring rotation, and depends on the hardness of the tooth metal to be crushed. Therefore, it is advantageous to use a material such as titanium as hard as possible.

  The scraping device 6 is a self-rotating type system corresponding to the rotation of the dry magnet device 5. In order to rotate by itself, the center of gravity is moved to the left or right force at the center point of 6. The position of the center of gravity movement may be determined by the number of rotations of the dry magnet device 5 or may be a motor system.

  As for the utilization of purified mud, those with a moisture content of about 65% using a dehydrator can be used as general soil, and those with a moisture content of about 25 to 30% can be used for various seedling cultivation, horticultural cultivation soil and fertilizer increases. It can be used for materials, seeding and raising seedling soils in devastated places, urban rooftop greening materials (Japanese Patent Laid-Open No. 2004-97185, the present inventor, Kikuya Tamura) and others.

  As for claim 3, for purification of polluted water discharged from the dry magnet device, the coagulant used is coagulation purification material kan A agent / kan kyo B agent (Japanese Patent Application No. 2004-243321, the present inventor, Kikuya Tamura). It is a product that uses a lot of natural objects and is friendly to the natural environment and does not cause pollution.

About Claim 4, it is the installation using the instant flocculant of Claim 3, and can utilize for all uses and can utilize the clarified water (Japanese Patent Application No. 2004-263045, this inventor, Tamura Ki Hisa), and the equipment can be downsized depending on the application.
[Action]

Purifying and recycling sludge using the dry magnet device of the present invention will not only effectively use resources, but also reduce the cost of water supply business by extending the life of final disposal sites or reducing the creation of new disposal sites. .
[Industrial applicability]

  In the present invention, since the sewerage company is troubled with sludge recycling, it is very preferable to completely recycle the sludge using the processing method and processing equipment according to the present invention. In addition, it is cost-saving and environmentally friendly recycling, and it can bear one aspect of maintaining or maintaining the natural environment, so it has great industrial utility value.

A method to remove harmful substances such as chlorinated compounds, heavy metals, PCBs and dioxins from sludge using the magnetic force of magnets. When the sludge passes through the N pole of the magnet in the fluid, harmful substances are magnetized on the N pole, and other colloids such as soil (colloidal soil) pass without being magnetized. Parallel installation of equipment that continuously removes harmful substances from sludge. Sludge treatment in large quantities or without interruption leads to mass production of the treatment amount, and as a result, the running cost of sludge treatment is reduced. Manufacturing cost can be reduced. The whole sectional view of a dry magnet device. The sludge containing water charged in the hopper 1 is pulverized into a fine powder by the spiral device 2 and sprayed into the separation chamber of the dry magnet device, and is magnetized by a strong 9 magnetic force. The magnetized material separated into non-magnetized material is released from the separation chamber, and is attracted and attracted to 9 superconducting magnets, and is magnetized onto one wall surface of the delivery pipe. For magnetized harmful substances, the main body of the dry magnet device is temporarily stopped, the recovery net is removed, and a new recovery net is replaced. The sewage discharged after being centrifuged in the centrifuge chamber 5 is sent and discharged to the agglomeration facility as the next step by the discharge pump of PB2. After being separated into a magnetized harmful substance and a non-magnetized substance in the centrifuge 5, the non-magnetized substance is centrifugally adsorbed to the outermost wall surface by the centrifugal force of the centrifuge and glued. To solidify. In order to scrape off the solidified material from the wall surface, the cleaned mud is scraped off by the rotation of the scraping plate 6 and sent to the 11 mud delivery pipe. Mud is carried out of the apparatus by the spiral device of PB1. Nine superconducting magnets are most preferable to have an output of several thousand gauss to several tens of thousands of gauss to several tens of thousands of gauss, and even sludge to be processed can be of several tens of gauss to tens of thousands of gauss. In some cases. The higher the rotation speed of the motor of M1, the more preferable it is for pulverizing and atomizing sludge. The higher the rotation speed of the M2 motor, the higher the centrifugal separation force and the shorter the porcelain separation and dehydration time. The effluent from the dry magnet device is completely clarified in an agglomeration facility (Japanese Patent Application No. 2004-263045) using an agglomeration agent A / B agent (Japanese Patent Application Laid-Open No. 2004-243312, the present inventor, Kikuya Tamura). Utilizing water that has been liquefied and clarified for multiple purposes.

Explanation of symbols

FIG. OD sludge
D Treated purified mud
A Noxious substances on side A adsorbed on the N pole
B Noxious substance on B side adsorbed on N pole
1 Sludge inflow pipe
2 Treated purified mud discharge pipe
3 Dry magnet H Sludge hopper
M Main dry magnet device
S secondary dry magnet device
D Purification mud outlet
F collection net
9 Powerful superconducting magnet P1 Purified mud discharge pipe P2 Contaminated water discharge pipe PB1 Purified mud discharge pump PB2 Contaminated water discharge pump D Purification mud discharge electromagnetic switch
F Recovery net M1 Sludge crushing and delivery device drive device M2 Dry magnet device rotation drive device M3 Scraping plate drive motor PB1 Purified mud discharge device PB2 Contaminated water discharge device
1 Sludge hopper
2 Sludge crushing and delivery equipment
3 Dry magnet device frame
4 Mud passage space
5 Dry magnet device
6 Treated mud scraper and plate
7 Centrifugal mud
8 Toxic material separation mud
9 Powerful superconducting magnet 10 Sewage discharge pipe 11 Purification mud discharge pipe 12 Sewage treatment discharge pipe (connected to the purification device)
13 Purified mud discharge spiral conveyor OD Sludge input M & S Main or secondary device of dry magnet device
K flocculating agent input KS sewage purification equipment using flocculating agent 14 sent to sedimentation sludge tank 15 clarified water sent as recycle

Claims (4)

  A manufacturing method that removes harmful substances from sewage sludge through a strong magnetic field, turns mud into general soil such as green farmland, and clarified water from polluted water, completely recycling mud and water.   The apparatus for removing harmful substances according to claim 1.   A method to recycle the discharged polluted water into clarified water.   Equipment for purifying discharged polluted water.

Images