Steam consumption of aqueous urea plant

Is what you say true? No, where did you hear about such low consumption? Our consumption is 1.4 tons. This seems to have a lot to do with analysis. In order to increase production, open up analysis and replenish materials. This post was last edited by lxq700918 on 2009-2-5 17:31 ]

Haven’t you heard that the gas consumption has dropped to 1,000kg per ton of urine? We use pre-separation - one-stage gas column and medium-pressure hydrolysis technology, and the ammonia consumption drops to 582/ton of urea, and the steam consumption is about 1200kg (original 1400kg), which feels very good. :lol

We are around 1.2 and have made the following modifications 1. The transformation of the urine tower trays improved the conversion rate. 2. Medium pressure process of pre-separation and pre-distillation. 3. Self-stripping one-stage tower 4. Change all evaporation to liquid ejector 5. Evaporative washing technology, two-stage recovery of washing liquid cycle. Also uses Monsanto hydrolysis technology. 6. Minimize the production of extra water in the system, such as evaporating flushing water without flushing with condensate, modifying the sealing water of the high-pressure ammonia pump, etc. This post was last edited by qiwu9981 on 2009-2-28 12:04 ]

The steam consumption of urea certainly includes the amount of hydrolysis steam. Our factory consumes about 200 kilograms of steam per cubic meter of ammonium bicarbonate liquid. This post was last edited by lxq700918 on 2009-2-7 22:03 ]

One more thing to add, the water traps of each heater in our factory have been changed to liquid level tanks.

Our question about steam consumption: The benchmark set by the leader is 1.2 tons, but it is basically exceeded, with an average of about 1.4 tons.

The steam consumption of Hualu Hengsheng's aqueous solution full cycle method is said to be very low, but the minimum is not clear. If you have friends there, you can consult.

Personally, I feel that if the urea steam consumption reaches less than 1,000, it may be consumed over a period of time. If the annual average consumption of the full cycle process is also less than 1,000, that would be great. By replenishing fluid after evaporation and shutdown, the steam consumption during a shift can reach less than 1,000. . hehe

For the traditional aqueous solution full cycle urea process, the steam consumption will not be less than 1,200, and is generally above 1,400. Some manufacturers are lower than this indicator, mainly due to measurement problems. Through inspections of some manufacturers, it is found that their return steam usage is large and is no longer within the measurement range. Therefore, their low steam consumption cannot explain the problem. The above people talked about the modification of the device, mainly in terms of output and consumption. Even so, the steam consumption will not be less than 1,000. Qian Jingqing is the general consultant of the China Urea Information Station and has been committed to the technical reform of the aqueous solution (mainly small nitrogen fertilizer) urea process. Although he is 78 years old, his main goal is to reduce the steam consumption of the aqueous solution urea process to 900 in his lifetime. Let our urea colleagues look forward to this day coming soon, and wish him a long and healthy life.

I can take comfort from Qian Lao. It is the company that applied 5 advanced technologies to the urea aqueous solution full cycle process for the first time, and the steam consumption was reduced to 0.93T.

Friend 11, can you please introduce in detail the specific measures to reduce steam consumption? 0.93 tons is indeed a bit unimaginable!

The first surface cooling and the second surface cooling adopt hydraulic vacuuming. The heaters for the first and second stages of decomposition are both two-stage. They are heated with 180-degree analytic liquid and 1.2MPA steam. The analytic steam is directly fed into the two-part tower to recover heat. The condensate is used as part of the heat source of the first steam, and the first-stage decomposition gas is used as the heat source of pre-steaming.

Part of the assessment data: Conversion rate 71 Ammonia consumption 575 Electricity consumption 138 Steam 931

Compared with so-called advanced processes such as CO2 stripping and ammonia stripping, the aqueous solution process can reduce ammonia consumption to very low levels, even lower than so-called advanced technologies, if management or technical improvement measures are in place. However, often due to some inherent deficiencies in process design, the steam consumption and power consumption of most aqueous urea plants cannot be compared with CO2 stripping. However, in recent years, with the efforts of domestic urea experts and some respectable brother urea companies, through a series of technical measures such as improving the internal structure of the urea tower to increase the conversion rate, the steam consumption and power consumption of the aqueous urea plant have dropped considerably. Some sea friends above mentioned that the weight has been reduced to 1000kg (but I don’t know if it is true or not? ), if this is true, it is definitely worth celebrating! Therefore, it is recommended that sea friends not only introduce your actual steam consumption, but also fully communicate or discuss the technical measures adopted. In order for aqueous solution technology to be further developed, sea friends are invited to actively participate! :handshake :handshake :handshake

To reduce steam consumption to less than 1,000 kilograms, I believe that advanced technology is the prerequisite and scientific management is the key. Even the best technology and equipment are useless without good management. Determining a reasonable production load based on equipment capabilities is the basis for energy conservation and consumption reduction.

Please ask bbc3762 Haiyou: Does the steam consumption of 931kg contain hydrolysis and desorption? If not, it would be unbelievable! However, it is indeed a great blessing for the domestic urea industry!

Our company's aqueous solution full cycle steam consumption is about 1.1. 1. The two towers are connected in parallel, and the urinary tower trays are changed to high-efficiency trays, and the conversion rate is increased to 68%. 2. Medium-pressure process of pre-separation and pre-distillation. 3. The evaporation system is changed to a water ejector. 4. The heater drain is changed to a gas-liquid separation tank. 5. There is no hydrolysis system. The analytical waste liquid is sent to the gas boiler jacket using Xuzhou water treatment technology.

I think the craftsmanship you mentioned is relatively similar to ours, 1. The two-part tower also adopts two-stage heating. The lower part still exchanges heat and does not consume steam. The high-temperature desorption gas is also added to the two-part tower and evacuated with hydraulic spray.

According to the data, if a self-stripping one-section tower, a "three-in-one" two-section tower, and a falling film flash evaporator are used, the consumption of urine steam per ton can be reduced to about 1 ton. Is it possible to achieve this? Hi friends who have adopted the above technologies are welcome to fully discuss based on the application situation.

The aforementioned steam is close to 700KG. Including desorption, it is about 930KG. This data is the data when we passed the 72-hour assessment at the beginning of the month. The synthetic conversion is about 72%, the ammonia is about 575, and the power consumption is slightly higher 183. During this period, the compressor (2235KW) and several large pumps (335KW) are often used for desorption, and the high-pressure steam of 3.8MPA is used. This post was last edited by lxq700918 on 2009-4-21 13:40 ]