CN103785675A

CN103785675A - Kieselguhr substitute raw material

Info

Publication number: CN103785675A
Application number: CN201210454712.1A
Authority: CN
Inventors: 肖功宽
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-31
Filing date: 2012-10-31
Publication date: 2014-05-14

Abstract

The invention discloses a kieselguhr substitute raw material. The kieselguhr substitute raw material has components and properties of the kieselguhr. Through industrial analysis, results show that the kieselguhr substitute raw material comprises 87.2% of SiO2 and less than 5.5% of Fe2O3 and Al2O3; the dry bulk density is 238kg/m<3>; the loss on ignition is 5.5%; the kieselguhr substitute raw material is stable in component and capable of replacing kieselguhr for producing micropore calcium silicate and replacing a sewage treatment agent for treating industrial sewage and domestic sewage. A treatment process comprises the steps of adding a sewage treatment agent which takes rice hull ash as a main component into the sewage; enabling the sewage to absorb, flocculate and settle in a centrifugal separator; filtering and clarifying the sewage in a clarification separator; and finally, settling the sewage in a sedimentation separator gradually and then enabling the sewage to be changed into clear water. The kieselguhr substitute raw material is excellent in absorption capacity, flocculation and sedimentation effects in sewage treatment; the treated sewage can be recycled completely, so that the kieselguhr substitute raw material is capable of treating various types of industrial sewage and domestic sewage, good in treatment effect, small in investment, small in occupied area, free of energy consumption and capable of fundamentally treating damage to the human survival environment caused by the sewage.

Description

A kind of diatomite substitutes raw material

Technical field

The present invention relates to a kind of diatomite and substitute raw material, it is the rice hulls ash after rice hulls burning, belongs to the comprehensive utilization of agricultural byproducts discarded object rice hulls.

Background technology

As everyone knows, China is a large agricultural country, and annual rice hulls output is up to 7.0 × 10t ⁷, it is discarded that a large amount of rice hulls is used as rubbish, especially in the processing of paddy, can produce a large amount of rice hulls and heap as mountain, both wasted building materials and energy resources, again pollution of ecological environment.Only have on a small quantity for life fuel or as feed addictive, if replace coal for boiler combustion or mix coal and make fuel, ash after burning, can be used as again building materials chemical industry, so reasonably develop these building materials and derived energy chemical resource and there is important economic worth and far-reaching social effect.

Summary of the invention

The invention reside in the exploitation of this refuse to rice hulls, provide a kind of economic and practical, especially the rice hulls ash after rice hulls burning can be made a kind of diatomite and substitute raw material.

The present invention is in order to solve its technical problem, and the technical scheme of taking is:

1. rice hulls element and Industrial Analysis result project are C/%H/%O/%N/%S/% moisture/% ash content/% low heat value/(M Jkg-1) combustible basis volatile matter/% content 33.92 4.36 31.28 0.21 0.1411.81 18.28 11.93 80.712.2, rice hulls combustion characteristics: rice hulls is placed in crucible, put into electric furnace at 900 ℃, 1000 ℃, at 1100 ℃ of three kinds of temperature, burn respectively 2 hours, find to be still loose condition (of surface) after rice hulls burning, it has diatomite composition and performance, can replace diatomite to produce microporous calcium silicate, the raw material of chemical products, rice hulls ash through Industrial Analysis result is, containing sio ₂87.2%, Fe ₂o ₃+ Al ₂o ₃238 kilograms of/cubic metre of loss on ignitions 5% of < 5.5% dry density, ingredient stability.

2. in the processing of paddy, can produce the general paddy per ton of a large amount of husks and have approximately 200～250 kilograms of rice husk ashes.Rice hulls is mainly made up of organic principle.In the ordinary course of things, in rice hulls, there are lignin 22%, cellulose 35%, pentosan 18%, ash 20% and other organic matter 2%.After rice hulls burning per ton, can produce the rice hulls ash of approximately 250 kilograms.Typical rice hulls ashing studies and is divided into: SiO ₂92.15%; Al ₂o ₃0.41%; Fe ₂o ₃0.21%; CaO 0.41%; MgO 0.45%; Na ₂o 0.08%; K ₂o2.31%; The density of loss on ignition 2.77% rice hulls is 110～150 kg/ms ³, ignition point is 280～300 ℃, calorific capacity is 4000～4200 kilocalories/kilogram, ash be 11～17% in the processing of paddy can produce a large amount of husks.Rice hull ash is mixed with portland cement and just can produce rice husk ash cement, paddy per ton has approximately 250 kilograms of rice husk ashes.Rice hulls ash can be made cement mixture, by rice hull ash be 70%, cement is being made up of organic principle of 30% mixing.Research discovery, husk is burnt has very large difference with the burnout characteristic of coal tar; Rising temperature might not improve the burn-off rate of husk, and the too high coke that makes on the contrary of temperature is difficult to after-flame.Burnout characteristic classification number TK16, in recent years, energy supply is more and more nervous, and countries in the world are all developing the new energy such as biological energy source, solar energy.

3. the microporous calcium silicate of producing with paddy ash, has that unit weight is light, thermal conductivity factor is little, uses the high and stay-in-grade feature of heatproof degree, can with match in excellence or beauty with the microporous calcium silicate that diatomite is produced, be a kind of desirable energy-conservation, insulation, heat-insulating material.

4. the invention provides a kind of with the processing industry of rice hulls ash and sanitary sewage, its treatment process is: in sewage, add the sewage-treating agent that rice hulls ash is main component---make sewage absorption in whizzer, flocculation, sedimentation,---in classifying separator, filter again clarification,---after sedimentation, become clear water step by step finally by precipitate and separate device.It has extremely strong adsorption capacity and flocculation, settlement action, and dirt after treatment can all reclaim, therefore can process various trade effluents and sanitary sewage, and treatment effect is good, small investment, takes up an area little, do not consume energy, can fundamentally administer the harm that sewage causes to environment for human survival.

5. produce insulating porous product of calcium silicate with rice hulls ash, its technique is: rice hulls ash burn, and------through the wet method desanding of sieving---with pump squeeze into size-mixing tank---manufacture insulating product adds water and 25～35% stirs into rice hulls mortar.

The present invention is further described to use embodiment combined process flow process below.

1,------through the wet method desanding of sieving---with pump squeeze into size-mixing tank---manufacture insulating product adds water and 25～35% stirs into rice hulls mortar to produce insulating porous product of calcium silicate technique with rice hulls ash: rice hulls ash burn

2, the invention provides a kind of technology and equipment of disposing of sewage with rice hulls ash inorganic agent.It adds the sewage-treating agent take paddy ash as main component in sewage---and make sewage absorption in whizzer, flocculation, sedimentation,---in classifying separator, filtering clarification---becomes clear water after sedimentation step by step finally by precipitate and separate device again.

3, rice hulls ash can be made cement mixture, by rice hull ash be 70%, cement is being made up of organic component of 30% mixing.

The specific embodiment

Microporous calcium silicate products uses the insulation at chemical industry equipment and process pipe, and its easy construction is respond well, uses in the insulation of industrial furnace and high-temperature reactor especially, and serviceability is more stable.Thermal conductivity factor 0.058 operating temperature ℃ 650 high temperature resistant type 1050 unit weight (kg/m ³) 170～240 rupture strength mpa>=0.2, compression strength mpa>=0.40.

Claims

1. diatomite substitutes a raw material, it is characterized in that: produce insulating porous product of calcium silicate technique with rice hulls ash: rice hulls ash burn, and------through the wet method desanding of sieving---with pump squeeze into size-mixing tank---manufacture insulating product adds water and 25～35% stirs into rice hulls mortar.

2. a kind of diatomite according to claim 1 substitutes raw material, it is characterized in that: can replace again sewage-treating agent with rice hulls ash, process industry and sanitary sewage, its treatment process is the sewage-treating agent adding in sewage take rice hulls ash as main component---make sewage absorption in whizzer, flocculation, sedimentation,---in classifying separator, filter again clarification,---after sedimentation, become clear water step by step finally by precipitate and separate device.Its effect is excellent, and it has extremely strong adsorption capacity and flocculation, settlement action, and dirt after treatment can all reclaim, therefore can process various industry and sanitary sewage, and treatment effect is good, small investment, take up an area littlely, do not consume energy, can fundamentally administer the harm that sewage causes to environment for human survival.

3. a kind of diatomite according to claim 1 substitutes raw material, it is characterized in that: rice hulls ash can be used as cement mixture, by rice hull ash be 70%, cement is being made up of organic principle of 30% mixing.