CN200943062Y

CN200943062Y - Sulfuric acid ammonia tubular reactor

Info

Publication number: CN200943062Y
Application number: CN 200620069023
Authority: CN
Inventors: 许洪兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-27
Filing date: 2006-01-27
Publication date: 2007-09-05
Anticipated expiration: 2016-01-27

Abstract

The utility model relates to an ammonium sulfate pipe reactor and pertains to the composite fertilizer equipment technical field. The device mainly adopts reaction pie; the reaction pipe is arranged on the flange at the end; the nozzle component is vertically arranged on the reaction pipe body. The reaction pipe body is respectively provided with an ammonium inlet, a detergent inlet, a steam inlet and the sulfuric acid inlet. The structure and material is resistant to high temperature, high pressure and high corrosion. The utility model adds the sulfuric acid, ammonium and the detergent to the entry terminal of the pipe reactor. The high temperature material generated by the reaction is vertically sprayed into the granular making machine on the material bed layer and is able to release large amount of reaction heat. Meting the solid material in the granular making machine changes the nature of the raw material and ensures the granular making is successful under the low-moisture condition. The appearance is sheen, intensity is high and the product quality is good, the production has low cost and can save energy consumption.

Description

Sulfuric acid, ammonia tubular reactor

Technical field

The utility model relates to a kind of sulfuric acid, ammonia tubular reactor; specifically be used for sulfuric acid, ammonia, washings are added to the inlet end of tubular reactor; reaction tubes puts in the tablets press; the high temperature slip that reaction generates vertically sprays on the interior material bed of tablets press, belongs to composite fertilizer's industry conversion unit technical field.

Background technology

At present, in compound fertilizer production technology, ammonia and phosphoric acid; Nitration mixture and sulfuric acid; in tubular reactor, react; generate high temperature low humidity slip; this hot melts slip uniformly sprays in tablets press in the surface of granulation material, and simultaneously, a large amount of reaction heat raises the granulation bed temperature; part material is melted and dissolving; satisfy the required liquid phase of granulation, rather than tradition granule uses steam or water to help granulation, and the available nutrient in the composite fertilizer is provided.

Tubular reactor mainly adopts following two kinds in composite fertilizer produces: a kind of is phosphorus coproducing ammonium compound fertilizer facility (cross tube reactor), and another kind is low temperature conversion production of sulfur-based compound fertilizer device (a nitration mixture reactor).With the utility model comparatively approaching be the cross tube reactor.Usually said tubular reactor is meant the cross tube reactor.Phosphoric acid enters respectively in relative two arms of cross tube reactor with sulfuric acid, and here behind the two thorough mixing, the gas ammonia (or liquefied ammonia adds water sometimes) with pipe core reacts again.The ammonia amount that enters should make phosphoric acid sulfuric acid all neutralize, and the slip that reaction is produced is sprayed onto in the tablets press by an elbow type pipe.It is mainly used in the production of monoammonium phosphate, diammonium phosphate, adds sylvite in its revert system, then produces complex fertilizer product.Phosphoric acid is weak acid; sulfuric acid is strong acid; phosphoric acid and ammonia react; temperature of reaction is below 160 ℃; sulfuric acid and ammonia react; temperature of reaction is more than 350 ℃; under the high temperature that produces when sulfuric acid and ammonia react, high pressure, the severe corrosive situation, the cross tube reactor can't realize that only be several days time its work-ing life at present; so U.S. Tian Nasi management board design sulfuric acid, ammonia are respectively two-tube; nozzle is embedded in tablets press bed of material internal reaction, reacts insufficient like this, and the ammonia loss is big; reaction heat energy utilization ratio is low, in the reaction process granulation is had side effect.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned weak point; thereby provide a kind of sulfuric acid and ammonia in pipe, to react; can discharge a large amount of reaction heat; tablets press internal solids material can be melted and dissolving; changed the rerum natura of raw material; guaranteed that granulation can granulating under lower moisture content condition, the sulfuric acid of complex fertilizer product gloss appearance, intensity height, good product quality, ammonia tubular reactor.

Main solution of the present utility model is achieved in that

The utility model mainly adopts in reaction body 1 reaction tubes 2 is housed, reaction body lid 3 is contained on reaction body 1 end flange, jet element 4 vertically is contained on the reaction body 1, is respectively equipped with ammonia inlet 5, washings inlet 6, steam-in 7 and sulfuric acid inlet 8 on reaction body 1.

Compared with the prior art the utility model has the following advantages:

1, energy-saving effect is remarkable:

Because the reaction of sulfuric acid, ammonia produces a large amount of reaction heat (6648kj/kgnh3), the high temperature low humidity slip of tubular reactor ejection makes that the granulation material layer temperature rises, the fused solution phasor increases, thereby tablets press outlet material moisture content is reduced to 2.0%～2.5%, and the water content of granulation material significantly reduces; Granulating rate rises, and returning charge has improved the throughput of device than descending; Washings can reclaim, and has promptly solved the recovery problem of wet method dedusting system washings, has reduced raw material consumption again; Granulation process need not to use steam, has reduced the investment of boiler; The dehumidification system load is low, has reduced dry required energy consumption, has improved the drying power of drying machine.

2, quality product promotes to some extent:

Particle external form slickness strengthens; Granule strength increases, and can reach more than the 20N, reaches as high as 34N, and product agglomeration resistance ability strengthens; The granulation fluctuation is little, and the fluctuation of product nutrient is little.

3, can effectively solve the problem of urine-base compound fertilizer poor properties:

Can solve the liquid phase that a large amount of dissolvings of urea bring to production in the production process effectively and exceed standard, play problems such as big ball, guarantee the steady running of device.

4, can effectively prevent the generation of bad side reaction:

Adopt sulfuric acid, ammonia tubular reactor to substitute traditional sulfuric acid, ammonia jet pipe, because the slip of tubular reactor ejection is an ammonium sulfate, no free sulfuric acid exists, thereby has thoroughly avoided the generation of side reaction, guarantee the stability of granulation effectively, can reduce the loss of ammonia simultaneously.

5, can effectively improve the turndown ratio of device:

By regulating acid, ammonia and washings flow, the i.e. operating load of tubular reactor.All can guarantee good granulation effect under conditions such as different prescriptions, raw material, season, thereby make device in Various Seasonal, adopt different material, various nutrient proportionings all can be produced, and have improved the production operation elasticity of device effectively, are fit to many variety production.

6, adaptability to raw material is strong, can select for use scope wide, need not the adding of sulphur ammonium and viscosity amendment, and each raw material all can guarantee good granulating through the flow of adjusting tubular reactor, guarantees that the granulating rate of granulation reaches more than 60%.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:

The utility model mainly is made up of reaction body 1, reaction tubes 2, reaction body lid 3, jet element 4, inlet 5, washings inlet 6, steam-in 7, sulfuric acid inlet 8 etc.

The present invention mainly adopts in reaction body 1 reaction tubes 2 is housed, and reaction body lid 3 is contained on reaction body 1 end flange, and jet element 4 vertically is contained on the reaction body 1, adopts thread connection, can freely adorn and drive, and is convenient to stop up cleaning.Jet element 4 adopts SPECIAL MATERIAL to make, and is threaded.On reaction body 1, be respectively equipped with ammonia inlet 5, washings inlet 6, steam-in 7 and sulfuric acid inlet 8.Gas ammonia inlet 5 usefulness screw flanges are fixing can be adorned and can roll over.Directly welding of washings inlet 6.Steam-in 7 its major functions are for purging, and the back sulphur ammonium that prevents to stop hardens in tubular reactor, can directly weld.

The present invention reacts body 1, reaction tubes 2, and the gas ammonia inlet 5 that is respectively equipped with on reaction body lid 3, jet element 4 and the reaction body 1, washings inlet 6, steam-in 7, sulfuric acid inlet 8 all adopt the very strong material of anti-corrosion nickel-base alloy to make.Its pressure is: 3～4 kilograms, temperature of reaction: 350 °, sulfuric acid and synthetic ammonia are corrosive.

Sulfuric acid, ammonia tubular reactor processing parameter: sulfuric acid: 30～100kg/t product; Ammonia: 15～40kg/t product; Washings: 0～150kg/t product.

Principle of work of the present invention and working process:

Various solid materials and intrasystem returning charge from material process enter rotary drum granulator.The sulfuric acid that is come by the sulfuric acid pumping and from the liquefied ammonia of ammonia jar (or synthetic ammonia installation) joins in the tubular reactor after metering, when temperature is high, directly carries liquefied ammonia with the pressure of ammonia jar; When temperature is low, carry with ammonia pump.Use ammonia evaporator to make the liquefied ammonia gasification, or adopt low-pressure steam to enter the front portion of tubular reactor, with the liquefied ammonia vaporization, be the washings in the recovery system, the washings of self-circulating pump adds tubular reactor simultaneously in the future.Sulfuric acid and ammonia carry out complete reaction in reaction tubes, the ammonia amount that enters should make sulfuric acid all neutralize, and generate ammonium sulfate.The ammonium sulfate that generates in the reaction tubes is by spraying with the rectangular nozzle of reaction tubes.Owing in tubular reactor, added the recovery slip; and the reaction heat of sulfuric acid and ammonia is big; so the logistics in the reaction tubes is gas, liquid mixture; this logistics is when nozzle sprays; under the high pressure draft effect, the ammonium sulfate that goes out reactor is by good atomizing and be sprayed at equably on the material bed in the tablets press.

Claims

1, a kind of sulfuric acid, ammonia tubular reactor, comprise reaction body (1), it is characterized in that adopting in reaction body (1) reaction tubes (2) is housed, reaction body lid (3) is contained on reaction body (1) end flange, and jet element (4) vertically is contained on the reaction body (1).

2, sulfuric acid according to claim 1, ammonia tubular reactor is characterized in that being respectively equipped with on the described reaction body (1) ammonia inlet (5), washings inlet (6), steam-in (7) and sulfuric acid inlet (8) and all adopt the ni-resist base alloy material to make.

3, sulfuric acid according to claim 1, ammonia tubular reactor is characterized in that described reaction body (1), reaction tubes (2), reaction body lid (3), jet element (4) all adopt the ni-resist base alloy material to make.