CN102010722A

CN102010722A - Foam coke-quenching method

Info

Publication number: CN102010722A
Application number: CN2009100442769A
Authority: CN
Inventors: 何相华; 雷新春; 王暾; 吴国林
Original assignee: 王暾
Priority date: 2009-09-07
Filing date: 2009-09-07
Publication date: 2011-04-13

Abstract

The invention belongs to the technical field of coking, in particular to a foam coke-quenching method. The method comprises the following steps of: 1, dissolving a foam coke-quenching addition agent composed of an anionic surfactant, rare earth salt, amine salt and a stabilizing agent into water to be prepared into a water solution with concentration of 5-20%; 2, putting the high-concentration water solution in the step one into a coke-quenching water pool in a set proportion to enable water in the coke-quenching water pool to become a water solution with concentration of 0.01-0.1%; and 3, pumping the low-concentration water solution in the step two into a sprayer to be sprayed on high-temperature red cokes, stopping spraying till the coke temperature is dropped below 200 DEG, and completing coke quenching. When the water solution with concentration of 0.01-0.1% containing the foam coke-quenching addition agent is used for replacing common water for coke quenching, the surface of the high-temperature red cokes can form a layer of gas film, therefore water does not directly contact with the high-temperature red cokes, physical shock damage and chemical activation damage of the water to the high-temperature red cokes are avoided, the coke quality can be greatly increased, and the emission of harmful dust is reduced.

Description

The foam coke quenching method

Technical field

The invention belongs to the coking technology field, further belong to a kind of quenching technology.

Background technology

Present coke quenching method has dry coke quenching and water quenching, dry coke quenching is with rare gas element cooling cokes such as nitrogen, it has the coke quality of raising and effect in energy saving and environmental protection, is a kind of advanced person's coke quenching method, but because equipment manufacturing cost is high and the high general coke-oven plant of running cost is difficult to bear.The water quenching is to make the quenching medium with ortho-water, is a kind of coke quenching method that is most widely used at present, and its advantage is that equipment manufacturing cost is low, and running cost is low; Shortcoming is to reduce coke quality on the one hand, produces the harmful steam that contains benzene, phenol, prussiate, sulfide and dust in a large number on the other hand and arranges to atmosphere, causes serious environmental to pollute.Though the method for adding passivator in coke quenching water is arranged at present, add the hot strength that passivator only can improve some coke, powerless in others.

Summary of the invention

The objective of the invention is: a kind of foam coke quenching method is provided, it does not change the Processes and apparatus of traditional water quenching, only adding with the anion surfactant in coke quenching water is the foam coke quenching additive agent of main component, substitute ortho-water with this aqueous solution that has added the foam coke quenching additive agent then and carry out quenching, so both increase substantially coke quality, reduced the coke water ratio; Reduced the discharging of harmful dust again significantly.

1., the foam coke quenching additive agent that will be made up of anion surfactant, rare-earth salts, amine salt and stablizer and water is with 1 foam coke quenching method of the present invention is as follows:: the ratio of (5～20) is dissolved in water, is mixed with weight percent concentration and is 5～20% the aqueous solution; 2., step high concentration solution is 1. put into the quenching pond by preset proportion, water in the quenching pond being become contain foam coke quenching additive agent weight percent concentration is 0.01～0.1% the aqueous solution; 3., step low concentration aqueous solution 2. pumped into spray thrower spray on red Jiao of high temperature, stop spray when treating below the burnt temperature drop to 200 ℃; 4., withdraw from the coke that is cooled.

The foam coke quenching additive agent weight percent of indication of the present invention is as follows:

Anion surfactant is a host of the present invention, its main effect is foaming, its low price, the foam that produces is abundant, time length is moderate, though most of anion surfactant sulfur-bearing, but what it contained is organosulfur, the coke absorbed dose is atomic even not to be absorbed, do not increase the sulphur content of coke after testing, other tensio-active agent such as cats product, nonionogenic tenside, amphoterics, special surface active agent and polymeric surface active agent also can replace anion surface activity to use, but the foam that they have is undesirable, what have costs an arm and a leg, and the fluorine element that contains that has damages conditions of blast furnace and furnace lining, all is not so good as the anion surfactant ideal.Anion surfactant of the present invention comprises: alkylsulphonic acid ammonium, alkylsurfuric acid ammonium, alkyl benzene sulphonate (ABS) ammonium, alkyl benzene sulphonate (ABS), sodium alkyl benzene sulfonate, water reducer NF, water reducer PA, water reducer AF, minimizing agent AT, pumping water reducer YJ-2, dispersing agent NNO, dispersing agent MF, sulfonated phenol formaldehyde resin, sulfonated melamine compound resin, sulfonated alkyl naphathalene, alkyl anthracene sulfonic acid salt, penetrant t, penetrating agent JFC, dye leveller LX-102 etc.

Rare earth is the element that a class has the particular electrical minor structure, they have some peculiar character, as catalysis, enhancing etc., rare earth element comprises scandium, yttrium and lanthanon, and lanthanon comprises lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium again.After rare earth element is absorbed by coke, can improve the cold conditions and the hot strength of coke, rare earth single-element separation difficulty, the cost height, so indication rare-earth salts of the present invention is to contain 17 kinds of elementary composition mixing salts, comprises rare earth chloride, rare earth nitrate, acetic acid rare earth, naphthenic acid rare earth, acrylic rare earth, Brominated rare earth, rare-earth stearate etc.

Amine salt has the effect of buffering, complexing, adjusting pH value, and described amine salt comprises carbon ammonium, urea, ammonium chloride, brometo de amonio, ammonium nitrate, vulkacit H, trolamine, hexanediamine etc.

Stablizer refers generally to increase the medicament of solution, colloid, solid, mixture equistability energy, can slow down speed of response, keep chemical equilibrium, reduce surface tension, prevent light, heat, precipitation or oxygenizement, add stablizer and can prolong the quality guaranteed period and the stabilised quality of foam coke quenching additive agent, described stablizer comprise Resorcinol, alkaline lead sulfate, diphenyl thiourea, acetaldehyde, propionic aldehyde, butyraldehyde, oxalic dialdehyde, glutaraldehyde etc.

Embodiment

Embodiment 1:

Prepare the foam coke quenching additive agent earlier, its weight percent is composed as follows:

With the foam coke quenching additive agent for preparing and water with the water-soluble aqueous solution that is mixed with 10% weight percent concentration of 1: 9 ratio, pour this high concentration solution and water into the quenching pond with 1: 200 ratio again after 10 minutes, be mixed with weight percent concentration and be 0.05% dilute aqueous soln, again this dilute aqueous soln is pumped into spray thrower, spray on red Jiao of high temperature, when treating below the burnt temperature drop to 200 ℃, stop spray, withdraw from coke.

Embodiment 2:

With the foam coke quenching additive agent for preparing and water with the water-soluble aqueous solution that is mixed with 5% weight percent concentration of 1: 19 ratio, pour this high concentration solution and water into the quenching pond with 1: 200 ratio again after 10 minutes, be mixed with weight percent concentration and be 0.025% dilute aqueous soln, again this dilute aqueous soln is pumped into spray thrower, spray on red Jiao of high temperature, when treating below the burnt temperature drop to 200 ℃, stop spray, withdraw from coke.

Embodiment 3:

With the foam coke quenching additive agent for preparing and water with 1: 4 the ratio preparation soluble in water also aqueous solution of 20% weight percent concentration, pour this high concentration solution and water into the quenching pond with 1: 200 ratio after 10 minutes, be mixed with weight percent concentration and be 0.1% dilute aqueous soln, again this dilute aqueous soln is pumped into spray thrower, spray on red Jiao of high temperature, when treating below the burnt temperature drop to 200 ℃, stop spray, withdraw from coke.

Claims

1., will being dissolved in water by the foam coke quenching additive agent that anion surfactant, rare-earth salts, amine salt and stablizer are formed, to be mixed with weight percent concentration be 5～20% the aqueous solution 1. foam coke quenching method is characterized in that step is:; 2., step high concentration solution is 1. put into the quenching pond with preset proportion, making water constituent in the quenching pond contain foam coke quenching additive agent weight percent concentration is 0.01～0.1% the aqueous solution; 3., step low concentration aqueous solution 2. pumped into spray thrower spray on red Jiao of high temperature, treat that burnt temperature drops to and stop spray below 200 ℃; 4., withdraw from the coke that is cooled.

2. foam coke quenching method according to claim 1 is characterized in that the weight percent of described foam coke quenching additive agent is:

3. foam coke quenching method according to claim 2 is characterized in that described anion surfactant is: alkylsulphonic acid ammonium, alkylsurfuric acid ammonium, alkyl benzene sulphonate (ABS) ammonium, water reducer NF, water reducer PA, water reducer AF, water reducer AT, pumping water reducer YJ-2, dispersing agent NNO, dispersing agent MF, sulfonated phenol formaldehyde resin, sulfonated melamine compound resin.

4. foam coke quenching method according to claim 2 is characterized in that described rare-earth salts is rare earth chloride, rare earth nitrate, acetic acid rare earth, naphthenic acid rare earth, acrylic rare earth.

5. foam coke quenching method according to claim 2 is characterized in that described amine salt is urea, carbon ammonium, ammonium chloride, ammonium nitrate, vulkacit H, trolamine.

6. foam coke quenching method according to claim 2, it is characterized in that described stablizer be acetaldehyde, propionic aldehyde, butyraldehyde, oxalic dialdehyde, glutaraldehyde, Resorcinol.