CN104058899A

CN104058899A - Soil conditioner prepared by using municipal solid waste

Info

Publication number: CN104058899A
Application number: CN201410285528.8A
Authority: CN
Inventors: 齐绍武; 柏连阳; 雷星宇; 陈淑萍; 张义; 钟治舜
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-24
Filing date: 2014-06-24
Publication date: 2014-09-24

Abstract

The invention discloses a soil conditioner prepared by using municipal solid waste, a main raw material of the soil conditioner is the municipal solid waste, mineral and trace element such as CaO, MgO, K2O and Na2O required by soil are added in the raw material, are burdened, the raw material is regenerated, and homogenized if qualified, then roasted, cooled and grinded to pass through a sieve with 180-200 meshes, and packaged and warehoused if homogenization and examination are qualified, so that the soil conditioner finished product is obtained. A plurality of active components in the soil conditioner is compounded with harmful heavy metal in soil and then passivated or deposited, so that cultivation function of soil can be recovered, and the qualified agricultural product can be produced.

Description

The soil conditioner that utilizes domestic waste to manufacture

Technical field

The present invention relates to a kind of domestic waste that utilizes and manufacture soil conditioner, belong to agrochemical technical field.

Background technology

Various places have following four kinds to the treatment process of domestic waste at present: the one, utilize its organic burning electricity generation, and the 2nd, adopt the landfill after antiseepage is processed of digging pit; The 3rd, utilize cement kiln calcining to manufacture cement clinker; The 4th, after classification organic through fermentation manufacture fertilizer, inanimate matter particularly brick and tile concrete etc. produce building aggregate; But do not find that there is the precedent of utilizing domestic waste to manufacture soil conditioner.These four kinds of methods have respectively following defect: when adopting burning, easy generation dioxin works the mischief to people's health; When adopting antiseepage landfill easily to cause leakage, the stench after fermentation affects periphery resident simultaneously; When adopting water kiln calcining rubbish, added value is low; When adopting, the complicated input of classification treatment scheme is high, various places are promoted more difficult, particularly people obtain the various resources of hundreds billion of tons from the earth every year does not also have the behavior of back feeding soil, the natural resources that people depend on for existence is fallen sharply, and people's existence and Sustainable development have been the problems that various circles of society show great attention to;

At present, people, in large-scale industrial activity, have not only consumed a large amount of ore fossil energy and clay thereof, add that extensive mode of agriculture has caused serious pollution to soil, typical in toxic heavy metals such as lead, cadmium, chromium, arsenic, mercury.If as fertilizer sources after the simple processing of these domestic refuses is directly spread fertilizer over the fields in field, can cause large-area soil cannot cultivate grain and oil crop, cause great effect to the grain and oil healthy and social stability self-supporting and people of China.

Summary of the invention

For making full use of the domestic waste of enormous amount, overcome the above-mentioned defect that existing processing domestic refuse method produces, the object of this invention is to provide a kind of soil conditioner that utilizes municipal wastes to produce, in order to reduce the cost of processing domestic waste, apply applicable various places, can avoid heavy metal to pollute to soil, improve soil, bring benefit to the people.

For solving its technical problem, the technical solution used in the present invention is: utilize organic matters a large amount of in municipal wastes and inanimate matter, after utilizing waste heat to be dried, to dewater, organic matter enters stoving oven as fuel, earth in inanimate matter, brick and tile, concrete, pottery etc. are crushed to the powder of 0.5-3cm after stoving oven roasting, as the aggregate of soil conditioner, then add that appropriate soil needs contain CaO, MgO, K ₂o, Na ₂the mineral of O and microelement powder are milled to 180 ~ 200 orders and make raw material and carry out homogenizing, and wherein trace element is allocated in grog; Then the reaction heat 3200KJ to per kilogram grog according to the heat supplement of rubbish organic matter, to after abundant homogenizing, enter kiln calcining by raw material, tail gas is through making full use of and enter atmosphere after denitration being processed, gained grog grinding to 180～200 order homogenizing after fully cooling is packed warehouse-in after the assay was approved, is soil conditioner finished product.

The composition of the described soil conditioner of producing is: municipal wastes, rhombspar, potassium, albite, nitric acid selenium, ammonium molybdate.

Described production soil conditioner raw material be: municipal wastes, CaO, MgO, K ₂o, Na ₂o and trace element, the weight percent of each raw material is: municipal wastes: 50%～70%, CaO:5% ~ 20%, MgO:15% ~ 25%, K ₂o: 4% ~ 7%, Na ₂o:3% ~ 5%, trace unit: 0.2%～0.4%;

Described trace element is nitric acid selenium and ammonium molybdate;

Preferably, described municipal wastes 55%～65%;

Preferably, described CaO: 10%～15%;

Preferably, described MgO: 18%～22%;

Preferably, described K ₂o: 5%～6%;

Preferably, described Na ₂o: 3.5%～4.5%;

Preferably, described trace element: 0.25%～0.35%.

Compared with prior art, the present invention has following substantive distinguishing features and progress:

1. raw material of the present invention is the discarded domestic wastes of people, utilizes organic matter in these domestic refuses for calcining provides sufficient heat, utilizes inanimate matter in these domestic refuses that raw material and the required element silicon of crop of conditioning agent are provided;

2, in raw material, add and contain CaO, MgO, K ₂o and Na ₂the raw mineral materials of O, can activate silicon and make it to produce solvability, also supplements the required element of plant simultaneously, particularly utilizes CaO, MgO, K ₂o, Na ₂the synergy of O is fully eliminated the harm of the contained heavy metal of rubbish itself, and for further displacement Cadmium in Soil, lead, chromium, mercury, arsenic provide sufficient active positively charged ion, finally make harmful heavy metal and silicate form stable compound, reach soil restoration farming function, produce the object of qualified agricultural-food;

3, in raw material, be added with the trace element containing selenium and molybdenum: can effectively produce antagonism with cadmium, lead, chromium, mercury, arsenic, thereby eliminate the harm of heavy metal in soil to agricultural-food.

In a word, the present invention compares with present technology, large public hazards of not only having eliminated city are garbage-surrounded city, make it resource utilization, and thoroughly stop the hidden danger of the secondary pollutions such as dioxin and seepage, and produce the amendment of the elimination heavy metal contamination of soil urgent need, particularly magnitude of recruitment macroelement potassium, balance moderate-element calcium, magnesium, the silicon in soil, also mixed certain trace element-selenium, molybdenum, make the functional and economy of product reach optimum regime.

Embodiment

The present invention is further described by the following examples:

Embodiment mono-: by municipal wastes, CaO, MgO, K ₂o, Na ₂o and trace element are by 55 ﹕ 15 ︰ 20 ︰ 5.8 ︰ 4 ︰ 0.2 batchings, wherein trace element is allocated in grog, reaction heat 3200KJ according to the heat supplement of rubbish organic matter to per kilogram grog, after abundant homogenizing, raw material enter kiln calcining, tail gas is through making full use of and enter atmosphere after denitration being processed, and gained grog grinding to 180～200 order homogenizing after fully cooling is packed after the assay was approved warehouse-in and obtained soil conditioner finished product.

Embodiment bis-: by municipal wastes, and CaO, MgO, K ₂o, Na ₂o, trace element are by 70 ︰ 5 ︰ 15 ︰ 5 ︰ 4.6 ︰ 0.4 batchings, and wherein trace element is allocated in grog.According to the heat supplement of rubbish organic matter to per kilogram grog reaction heat to 3200KJ, raw material after abundant homogenizing enter kiln calcining, tail gas is through making full use of and enter atmosphere after denitration being processed, obtain grog fully cooling rear grinding to 180～200 order homogenizing pack after the assay was approved warehouse-in and obtain soil conditioner finished product.

Above embodiment has been described in detail essence of the present invention; but can not to protection scope of the present invention, limit with this; all simple modifications of doing according to the present invention's essence, modification or equivalent transformation, within all dropping on claim protection domain of the present invention.

Claims

1. a soil conditioner that utilizes domestic waste to manufacture, is characterized in that: the main raw material of this soil conditioner is domestic waste, is added with CaO, MgO, K that soil needs in raw material ₂o, Na ₂the mineral of O and trace element, pack warehouse-in after the assay was approved through grinding, homogenizing, roasting, cooling and grinding to 180～200 order and homogenizing, is soil conditioner finished product; The starting material of described soil conditioner are: municipal wastes, rhombspar, potassium, albite, nitric acid selenium, ammonium molybdate.

2. the soil conditioner that utilizes domestic waste to manufacture according to claim 1, is characterized in that: the weight percent of described each composition of manufacture soil conditioner raw material is: municipal wastes: 50%～70%, CaO:5% ~ 20%, MgO:15% ~ 25%, K ₂o: 4% ~ 7%, Na ₂o:3% ~ 5%, trace element: 0.2%～0.4%.

3. the soil conditioner that utilizes domestic waste to manufacture according to claim 1 or 2, is characterized in that: described trace element is nitric acid selenium and ammonium molybdate.

4. the soil conditioner that utilizes domestic waste to manufacture according to claim 1 or 2, is characterized in that: described manufacture soil conditioner the weight percent of each composition of raw material in, described municipal wastes accounts for 55%～65%.

5. the soil conditioner that utilizes domestic waste to manufacture according to claim 1 or 2, is characterized in that: in the weight percent of described each composition of manufacture soil conditioner raw material, described CaO accounts for 10%～15%.

6. the soil conditioner that utilizes domestic waste to manufacture according to claim 1 or 2, is characterized in that: in the weight percent of described each composition of manufacture soil conditioner raw material, described MgO accounts for 18%～22%.

7. the soil conditioner that utilizes domestic waste to manufacture according to claim 1 or 2, is characterized in that: in the weight percent of described each composition of manufacture soil conditioner raw material, and described K ₂o accounts for 5%～6%.

8. the soil conditioner that utilizes domestic waste to manufacture according to claim 1 or 2, is characterized in that: in the weight percent of described each composition of manufacture soil conditioner raw material, and described Na ₂o accounts for 3.5%～4.5%.