CN101671575A

CN101671575A - Cement and water gas joint production method

Info

Publication number: CN101671575A
Application number: CN200810160839A
Authority: CN
Inventors: 任首旺
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-11
Filing date: 2008-09-11
Publication date: 2010-03-17

Abstract

The invention discloses a cement and water gas joint production method, which is a breakthrough in the fields of building materials and energy sources. In the method, water is used as energy to be decomposed for use; and carbon-containing materials such as coal and plants are used as energy which is clean, convenient and multipurpose (as an ordinary fuel, the fuel of an internal combustion engine,a metallurgical fuel, a chemical raw material and the like). The method comprehensively solves the problems of the production of cement with low energy consumption and low-cost use.

Description

Cement, water gas joint production method

Field: building materials, the energy

Background: the plant clean energy is the problem that people study always.Obtaining blau-gas is the bottleneck of coal oil refining.Cheap water of decomposition, making water become the human energy is that peoples dream is thought.Cement is to use maximum materials in the modern architecture, and reducing the manufacture of cement cost to greatest extent is the target that people pursue.Cement, water gas joint production method are exactly a kind of method that comprehensively overcomes the above problems.

Purpose: add catalyst decomposes water with carbon, produce pure carbon monoxide and hydrogen, make unavailable ash (solid impurity) generation cement in the raw materials for production simultaneously, the professional etiquette of going forward side by side modelling controllable continuous is produced.

Scheme:

One, raw material:

1, carbonaceous material comprises the plant materials that contains simple substance carbon after raw coal, coal gangue, the destructive distillation.Main component is carbon, ash, tar.

2, water.Main component is H ₂O

3, unslaked lime.Main component is CaO, obtains with limestone calcination.

Two, production process (referring to accompanying drawing):

At first with rotary kiln with Wingdale (CaCO ₃) being sintered into unslaked lime (CaO), calcinating fuel is with finished product water-gas (CO and H ₂Gas mixture) the kiln temperature is about 1000 ℃ ± 50 ℃, and kiln discharge makes the unslaked lime cooling through the air cooling of cooling tank fermented soya beans, salted or other wise, produces hot blast simultaneously.The unslaked lime temperature is reduced to 300 ℃ ± 20 ℃.When carbonaceous material is selected plant materials for use, earlier plant materials is carried out destructive distillation, with directly sealing grinding of the plant carbon and the kiln discharge unslaked lime that obtain (needn't through cooling tank).Elder generation (increased the reaction contact surface to greatest extent with the unslaked lime mixed grinding that the rotary kiln waste heat (tail gas) and the second retort waste heat (tail gas) are preheated to 300 ℃ ± 20 ℃ (can not make coal tar pitch volatiles) and process cooling tank when carbonaceous material was selected raw coal for use, prevent raw coal high temperature caking, when the raw coal coking property is high, need to mix use, in the retort coking phenomenon must not take place) with the coal or the spoil of no coking property.Blending ratio requires according to cement mark and the raw material ash is decided.

That first retort is that the hollow circular cone of lying on one's side adds is cylindrical, steel shell, the high aluminum cushion layer requirement of interior block gas can vortex flow in jar.Powder mix after the grinding crouches circular cone conical surface top by falling into naturally from gravity by retort, falls into just in time to be in a jar interior air-flow in the mouth and not have pressure position.Water vapour enters from the circular cone side with powder mix formation and mixes cyclone.Enter H ₂The ratio control of O and C is 3: 2 (a net content weight ratio).It is 300 ℃ ± 20 ℃ that powder mix enters temperature, and it is that 800 ℃ ± 20 ℃, pressure are 8Pa/m that water vapour enters temperature ², temperature is 600 ℃ ± 20 ℃ in jar, a jar internal pressure is 4Pa/m ²Also carried out initial reaction when mixing cyclone with the reactant mixing.Because of raw material all is a mixture, the reaction process more complicated, the principal reaction formula is:

([Ca in the formula ^{+ 2}+ (OH) ^-+ (OH) ^-] be instability mode Ca (OH) ₂Representation)

Reaction principle is CaO+H ₂O forms Ca (OH) ₂And Ca (OH) ₂Can be decomposed into CaO and H again during high temperature ₂O, being 550 ℃-650 ℃ in temperature has under the condition of certain pressure CaO and H ₂O can only be with unsettled [Ca ^{+ 2}+ (OH) ^-+ (OH) ^-] form exists, and C is quite active under this temperature, captures [Ca ^{+ 2}+ (OH) ^-+ (OH) ^-] in an O after settle out and [Ca with the CO form ^{+ 2}+ (OH) ^-+ (OH) ^-] lose behind the O also with CaO+H ₂Form settles out.

Reactant fully enters second retort behind mixing and the initial reaction in first retort, second retort is a main treatment tank, structure is similar to the heat exchanger of pipe jar structure, reactant passes through to be reaction zone in the high-strength high-alumina pipe, managing in outer jar is the combustion zone, the hot blast mixed firing (the second retort tail gas adds warm air generation hot blast when being raw material with plant materials) that blows in irritating with finished product water-gas and unslaked lime cooling.Combustion zone temperature remains on 1200 ℃ ± 50 ℃, and reaction zone temperature is at 900 ℃ ± 20 ℃, and pressure is 5Pa/m ²The reaction of reactant in second retort has the continuation of first retort, also has

With CaO+ ash (all solid matters that can not gasify in the reactant)

Complex reactions such as cement.Reactant is in the second retort planted agent complete reaction.Second retort is double-deck steel, in Al is arranged ₂O ₃Plasma-coated, the cooling of high-pressure pump setting-out is arranged in the middle of the two-layer box hat, cooling water also is simultaneously that (water vapour of generation enters first retort by two, three, four interchanger to the reaction water successively, so second retort also is first interchanger simultaneously.

The 3rd retort also is the 4th interchanger simultaneously, and structure is similar to second retort, adds thermal insulation layer by stainless steel tube and cylinder of steel shell and forms.The pyroreaction thing passes through in stainless steel tube, for reacting completely to guarantee reactant in the postreaction district.Reactant enters 950 ℃ ± 20 ℃ of temperature, goes out 750 ℃ ± 20 ℃ of temperature, and water vapour passes through in irritating outside managing, go into 600 ℃ ± 20 ℃ of temperature (minimum must not be lower than 550 ℃), go out 800 ℃ ± 20 ℃ of temperature, reactant goes out the 3rd retort, the end that reacts completely, resultant are water-gas (CO and H by volume ₂Respectively account for half, low-temperature sludge is separable), cement, raw material have coal tar during for coal.

Enter gravitational precipitator and tornado dust collector then successively and carry out gas solid separation, lower part of two fly-ash separators is a heat exchanger type, it is the 3rd interchanger, isolated pressed powder is cement, add gypsum conciliation back fine grinding and be finished product, isolated water-gas is crossed tar holding tank (not establishing when using plant material) behind second interchanger, enter through bag-type dust and leave standstill filling, leaves standstill two hours after desulfurization is finished product.Obtain CO and H respectively through the low-temperature sludge separation ₂

Three, description of drawings

Accompanying drawing is cement, water gas joint production method schema.Concrete legend is seen explanation of accompanying drawing upper right side and lower right remarks.

Effect: do not have simple substance carbon to occur in the finished product, namely the simple substance carbon in the carbonaceous material and water total overall reaction generate CO and H₂ Coal does not have coking phenomenon to take place in first retort; Vaporous water coal gas does not have The sintering of influential CaO and solid ash. Coal tar is basic the reservation after reaction finishes, and produces Reaction is not exerted an influence in the process.

Claims

1, a kind ofly add catalyst decomposes water with carbon, generate carbon monoxide and hydrogen, catalyzer and the ash in the raw material that will finish the catalysis mission simultaneously sinter the Cement Production method into.It is characterized in that: the carbonaceous material and the water that exist with nature are basic raw material, are catalyzer with unslaked lime, generate carbon monoxide and hydrogen under certain temperature, pressure.Solid matter that can not gasify in the raw material and unslaked lime sinter cement simultaneously into.

2, according to the carbonaceous material described in the claim 1, it is characterized in that referring to that occurring in nature contains the material of simple substance carbon, comprise the plant materials that contains simple substance carbon after various coals and coal gangue and the destructive distillation.

3, according to the water described in the claim 1, it is characterized in that the water that certain aggregate amount is arranged of occurring in nature normal presence, after treatment, container non-scaling in the time of can reaching gasification.

No matter be the material of main component with CaO for what obtain 4, with any means according to the unslaked lime described in the claim 1.