SU806599A1 - Phosphoric acid mist trapping method - Google Patents

Phosphoric acid mist trapping method Download PDF

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Publication number
SU806599A1
SU806599A1 SU782592554A SU2592554A SU806599A1 SU 806599 A1 SU806599 A1 SU 806599A1 SU 782592554 A SU782592554 A SU 782592554A SU 2592554 A SU2592554 A SU 2592554A SU 806599 A1 SU806599 A1 SU 806599A1
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SU
USSR - Soviet Union
Prior art keywords
phosphoric acid
acid mist
trapping method
mist trapping
trapping
Prior art date
Application number
SU782592554A
Other languages
Russian (ru)
Inventor
Мамырбек Алтыбаев
Лесбек Муслимович Бекжанов
Владимир Васильевич Стрельцов
Original Assignee
Казахский Химико-Технологическийинститут
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Priority to SU782592554A priority Critical patent/SU806599A1/en
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Publication of SU806599A1 publication Critical patent/SU806599A1/en

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Description

Изобретение относитс  к технологии очистки отходных газов производ ства термической фосфорной кислоты .от ее туманаi Известен способ улавливани  тума .на фосфорной кислоты в многопольных электрофильтрах .1 . Недосэ;аток способа - проведение многоступенчатой очистки дл  повышени  ее эффективности, тем не мен.ее содержание фосфорного ангидрида в отход щих газах составл ет 4550 мг/м. Известен способ улавливани  тума на фосфорной кислоты кальцинированной содой в кип щем слое. Процесс ведут при температуре до и ра мере частиц содвл 0,03-1,1 мм 2. Недостаток способа - низка  степень улавливани  (б5,5%. Цель изобретени  - повышение степени улавливани . Поставленна  цель достигаетс  тем,, что в известном способе улавливани  тумана фосфорной кислоты кальцинированной содой в кип щем слое процесс ведут при 130-170°С, что поз вол ет повысить степень очистки до 99,99%. При температуре ниже снижа етс  степень улавливани , а выше 170°С процесс вести нецелесообразно, из-за увеличени  скорости обооудовани . Предлагаемый способ осуществл етс  следующим образом. Отход щие газы производства термической фосфорной кислоты после 6aiu-ни сжигани  и гидратации направл ют в циклон, где очищают от пыли, а затем в реактор кип щего сло . Туда же подают кальцинированную соду с размером частиц 0,3-0,6 мм. После реактора газы направл ют в циклон и в скруббер дл  очистки от увлекаемых частиц соды. В таблице приведены значени  степени улавливани  различных температурах и содержание в отход щих газахThe invention relates to the technology of purification of waste gases from the production of thermal phosphoric acid. From its mist. There is a known method for trapping fog in phosphoric acid in multi-field electrostatic precipitators .1. The process flow rate is a multistage purification process to increase its efficiency, however, the content of phosphoric anhydride in the exhaust gases is 4550 mg / m. There is a known method for trapping phosphate on sulphate of soda ash in a fluidized bed. The process is carried out at a temperature of up to and at a particle size of 0.03-1.1 mm. 2. The disadvantage of the method is the low degree of trapping (b5.5%. The purpose of the invention is to increase the trapping degree. The goal is achieved by the fact that in the known method of trapping The fluidized bed mist of phosphoric acid with soda ash in the fluidized bed is carried out at 130–170 ° C, which allows an increase in the degree of purification to 99.99%. At a temperature below, the degree of trapping decreases, and above 170 ° C it is impractical to conduct for increasing the speed of the equipment. is as follows: After 6aiu-burning and hydration, waste gases from the production of thermal phosphoric acid are sent to a cyclone, where they are cleaned from dust, and then to a fluidized-bed reactor. Soda ash is also fed into the cyclone. , 6 mm. After the reactor, the gases are directed to a cyclone and to a scrubber for cleaning of entrained soda particles. The table shows the values of the degree of trapping at various temperatures and the content in the exhaust gases

Продолжение таблицыTable continuation

Таким образом, предлагаелйлй способ позвол ет повысить степень улавливани  тумана фосфорной кислоты, сократить вредные выбросы в атмосфет ру и получить экономический эффект по ЧПО фосфор 220 тыс. руб в год.Thus, the proposed method allows to increase the degree of capture of phosphoric acid mist, reduce harmful emissions into the atmosphere and to obtain an economic effect on PPP phosphorus 220 thousand rubles per year.

Claims (2)

1.Термическа  фосфорна  кислота соли и удобрени  на ее основе. Под1. Thermal phosphoric acid salt and fertilizer based on it. Under 20 ред. Н.Н.Постникова. 1976, с. 120.20 ed. N.N.Postnikova. 1976, p. 120 2.Хими  и химическа  технологи . Каз. ГУ, 1976, с. 111-119.2. Chemical and chemical technology. Kaz State University, 1976, p. 111-119.
SU782592554A 1978-03-21 1978-03-21 Phosphoric acid mist trapping method SU806599A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU782592554A SU806599A1 (en) 1978-03-21 1978-03-21 Phosphoric acid mist trapping method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU782592554A SU806599A1 (en) 1978-03-21 1978-03-21 Phosphoric acid mist trapping method

Publications (1)

Publication Number Publication Date
SU806599A1 true SU806599A1 (en) 1981-02-23

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Family Applications (1)

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SU782592554A SU806599A1 (en) 1978-03-21 1978-03-21 Phosphoric acid mist trapping method

Country Status (1)

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SU (1) SU806599A1 (en)

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