CN203959842U

CN203959842U - Reclaim the speed system of ammonia in venting of ammonia car

Info

Publication number: CN203959842U
Application number: CN201420363368.XU
Authority: CN
Inventors: 周明; 朱有保; 黄晓燕
Original assignee: ANHUI QUANSHENG CHEMICAL CO LTD
Current assignee: ANHUI QUANSHENG CHEMICAL CO LTD
Priority date: 2014-07-02
Filing date: 2014-07-02
Publication date: 2014-11-26
Anticipated expiration: 2024-07-02

Abstract

A kind of ammonia car system of ammonia in venting of speeding that reclaims, relate to chemical technology field, utilize the pipeline of original ammonia car off-gas deicing machine, the venting of speeding containing the ammonia car of ammonia is introduced to ammonia absorber, absorb by the de-salted water in the bubbling segment of bottom and twice of the bubble-cap section on top and tower, absorb 95% ammonia in the venting of speeding, residual air enters absorption cell bottom, carry out bubble absorption with de-salted water wherein again, use tower and be less than 0.5% containing ammonia in dropping a hint, the ammonia circulation concentrate to 11% of generation is sent urea to resolve and is recycled into liquefied ammonia for urea production.The utility model method is simple, and equipment investment cost is low, good in economic efficiency, has not only reclaimed ammonia but also free from environmental pollution, has reached better effects.

Description

Reclaim the speed system of ammonia in venting of ammonia car

Technical field

The utility model relates to chemical technology field, is specifically related to a kind of ammonia car system and method for ammonia in venting of speeding that reclaims.

Background technology

My 240,000 tons of synthetic ammonia installations of company are since going into operation in May, 2013, and per day outer 300 tons, the liquefied ammonia of selling, reaches 800 tons at most time.It is to rely on the filling transport of tank car that design liquefied ammonia is sold outward, need discharge a large amount of nitrogen (filling when client unloads) of balance in speed venting and car wherein when filling.According to calculating and actual measurement, an every filling car (24 tons of left and right) liquefied ammonia, approximately 200 kilograms, the liquefied ammonia of taking out of with off-gas, therefore must reclaim.Original design this speeded to exit and is recycled in the level 2 buffering tank of three sections of imports of centrifugal ice maker, and after ice maker compression is cooling, liquid ammonia recovery is to little ammonia storage tank.In fact owing to containing a large amount of noncondensable gases in ammonia car off-gas, in the process of ice maker compression, these non-condensable gases cannot compress, cause ice maker exit gas pressure rise after condensation, in increasing ice maker load, must emptying release after evaporating cold, the non-condensable gas gathering is bled off, in the time of emptying, can bleed off a large amount of liquefied ammonia, not only cause the loss and waste of ammonia, bring large pressure to environmental protection simultaneously.

As shown in Figure 1, later stage improves this, increase by an ammonia storage tank, the gas ammonia in directly discharging with pump circulation absorbing ammonia car, remaining gas is from the emptying of groove top, because water produces a large amount of heat in the process of absorbing ammonia, cause in absorption process, in groove, weak ammonia temperature rises gradually, and assimilation effect is poor, in dropping a hint, contain a large amount of unabsorbed ammonia, do not reach the design effect of expection.

In Ammonia Production, the treatment process that current technique is not good to ammonia car off-gas, is to be mostly directly recycled to directly burning in three-waste mixed fired boiler, and in this off-gas, combustible gas content is not high on the one hand, reclaim burning value not high, a large amount of gas ammonia loss and waste on the other hand.

Utility model content

Technical problem to be solved in the utility model be to provide a kind of form simple, the speed system of ammonia in venting of good in economic efficiency recovery ammonia car.

Technical problem to be solved in the utility model realizes by the following technical solutions:

A kind of ammonia car system of ammonia in venting of speeding that reclaims, comprise and the ammonia car ammonia absorber that is connected of venting of speeding, described ammonia absorber is divided into the bubbling segment of bottom and the bubble-cap section on top, and described bubbling segment is connected by pump and pipeline with bubble-cap section, and described ammonia absorber top is connected to absorption cell by pipeline.

A kind of ammonia car method of ammonia in venting of speeding that reclaims, utilize the pipeline of original ammonia car off-gas deicing machine, the venting of speeding containing the ammonia car of ammonia is introduced to ammonia absorber, absorb by the de-salted water in the bubbling segment of bottom and twice of the bubble-cap section on top and tower, absorb 95% ammonia in the venting of speeding, residual air enters absorption cell bottom, carry out bubble absorption with de-salted water wherein again, use tower and be less than 0.5% containing ammonia in dropping a hint, the ammonia circulation concentrate to 11% of generation is sent urea to resolve and is recycled into liquefied ammonia for urea production.

The beneficial effects of the utility model are: the utility model method is simple, and equipment investment cost is low, good in economic efficiency, have not only reclaimed ammonia but also free from environmental pollution, have reached better effects.

Brief description of the drawings

Fig. 1 is ammonia car release gas recovery ammonia system in prior art;

Fig. 2 is the utility model recovery system figure.

Embodiment

For technique means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in Figure 2, a kind of ammonia car system of ammonia in venting of speeding that reclaims, comprise and the ammonia car ammonia absorber 1 that is connected of venting of speeding, described ammonia absorber 1 is divided into the bubbling segment of bottom and the bubble-cap section on top, described bubbling segment is connected by pump 2 and pipeline with bubble-cap section, described ammonia absorber 1 top is connected to absorption cell 3 by pipeline, utilize the pipeline of original ammonia car off-gas deicing machine, the venting of speeding containing the ammonia car of ammonia is introduced to ammonia absorber 1, absorb by the de-salted water in the bubbling segment of ammonia absorber 1 bottom and twice of the bubble-cap section on top and tower, absorb 95% ammonia in the venting of speeding, residual air enters absorption cell 3 bottoms, carry out bubble absorption with de-salted water wherein again, use tower and be less than 0.5% containing ammonia in dropping a hint, the ammonia circulation concentrate to 11% generating is sent urea to resolve and is recycled into liquefied ammonia for urea production.

Economic benefit (basis), social benefit, environmental benefit:

New device is driven so far, sell altogether 8.5 ten thousand tons, liquefied ammonia, fill altogether 3542 train numbers, by entrucking loss liquefied ammonia 200kg, the rate of recovery 99.5% is calculated, this device is total to 705 tons of liquid ammonia recoveries, press 2300 yuan of calculating of liquefied ammonia average price, 1,620,000 yuan of recovery values, average ammonia concn calculates by 11%, desorb 1T ammoniacal liquor need consume steam 1T, consume altogether steam 4230T, press 110 yuan/ton of calculating of 2.5MPa steam, consume steam and be worth 46.5 ten thousand yuan, consume 4230 tons of de-salted waters, de-salted water unit price per ton is by 4 yuan of calculating, consuming altogether de-salted water expense is 1.7 ten thousand yuan, this device altogether recovery value is 113.8 ten thousand yuan.

More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. one kind is reclaimed the ammonia car system of ammonia in venting of speeding, it is characterized in that: comprise and the ammonia car ammonia absorber that is connected of venting of speeding, described ammonia absorber is divided into the bubbling segment of bottom and the bubble-cap section on top, described bubbling segment is connected by pump and pipeline with bubble-cap section, and described ammonia absorber top is connected to absorption cell by pipeline.