CN1055449C - 湿法磷酸生产中硫酸的槽外稀释工艺 - Google Patents

湿法磷酸生产中硫酸的槽外稀释工艺 Download PDF

Info

Publication number
CN1055449C
CN1055449C CN96101706A CN96101706A CN1055449C CN 1055449 C CN1055449 C CN 1055449C CN 96101706 A CN96101706 A CN 96101706A CN 96101706 A CN96101706 A CN 96101706A CN 1055449 C CN1055449 C CN 1055449C
Authority
CN
China
Prior art keywords
sulfuric acid
dilution
vitriolic
diluted material
phosphoric acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN96101706A
Other languages
English (en)
Other versions
CN1153742A (zh
Inventor
谭百平
刘戎生
吕庆胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YUNNAN SANHUAN CHEMICAL Co.,Ltd.
Yunnan Sanhuan chemical Limited by Share Ltd.
Yunnan Yuntianhua International Chemical Co ltd
Original Assignee
YUNNAN PHOSPHATE FERTILIZER PLANT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YUNNAN PHOSPHATE FERTILIZER PLANT filed Critical YUNNAN PHOSPHATE FERTILIZER PLANT
Priority to CN96101706A priority Critical patent/CN1055449C/zh
Publication of CN1153742A publication Critical patent/CN1153742A/zh
Application granted granted Critical
Publication of CN1055449C publication Critical patent/CN1055449C/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

本发明公开了湿法磷酸生产中硫酸的槽外稀释工艺。本发明在反应槽外设置一个稀释换热装置及两个分配调节器，93-98%的浓硫酸经过硫酸分配器均匀分流与经过稀释物料分配器分配均匀的稀释物料混合稀释，并冷却至70-74℃后再进入反应槽参与反应。本发明在槽外将稀释热移走，降低了反应槽的热负荷，改善了石膏结晶，提高了生产能力。

Description

湿法磷酸生产中硫酸的槽外稀释工艺
本发明涉及一种湿法磷酸生产工艺，具体涉及一种湿法磷酸生产中硫酸的槽外稀释工艺。
在现有的湿法磷酸生产工艺中，一般都是将92-98％的浓硫酸直接加入反应槽内的料浆中参与反应，反应过程中会产生大量的稀释热，反应体系内形成局部过热及局部过浓的现象，因而会产生约占反应产物重量16％的半水石膏及大量的二水石膏晶核，由于大量微小结晶核的存在，降低了石膏的过滤性。为解决上述问题，改善加料方式，移走反应槽内产生的大量稀释热，通常是采用真空冷却法即用泵将反应槽内的料浆送入真空冷却器冷却后，再返回反应槽，但该方法需要一台扬程和流量较大的料浆泵，设备投资大，安装工期长。
本发明的目的在于克服现有技术中的不足，提供一种湿法磷酸生产中硫酸的槽外稀释工艺，该工艺在现有技术的基础上，在反应槽外增设一个稀释换热装置及两个分配调节器，浓硫酸与稀释物料分别经各自的分配器调节后混合而得到稀释，并冷却后再进入反应槽参加反应。
下面结合附图及附图所示的实施例对本发明的内容作详细描述。
图1是本发明的工艺流程示意图。
F-流量，I-指示，C-调节，A-报警，T-温度，D-密度，R-记录。
本发明的生产工艺是在反应槽外增设一个稀释换热装置和两个分配调节器，93-98％的浓硫酸经过硫酸分配器均匀分流与经过稀释物料分配器均匀分配的稀释物料(稀释物料一般只需加入反应槽的回磷酸，如回磷酸的量不够时，可以加工艺水，低浓度废硫酸、含少量磷酸及硫酸的废水)混合稀释，并冷却至70-74℃后再进入反应槽。上述硫酸的稀释浓度为68-75％。
本发明的湿法磷酸生产中硫酸的槽外稀释工艺，在原有工艺的基础上增加了稀释装置后，按硫酸需要稀释的程度，按比例加入硫酸及稀释物料，各种物料的加入量可通过流量计测量控制，另外，因为硫酸的稀释热在反应槽外已被移走，使反应槽的热负荷降低了25-28％，还由于参与反应的硫酸的浓度降低，改善了石膏结晶的均匀性，与传统工艺相比可提高生产能力30％左右。
本发明工艺路线短，只需将硫酸及稀释物料比值串联调节，操作简单方便，能有效地改善石膏结晶的均匀性，提高生产能力，有效降低生产成本。

Claims (1)

1、一种湿法磷酸生产中硫酸的槽外稀释工艺，其特征在于该工艺在反应槽外设置了一个稀释换热装置及两个分配调节器，93％～98％的浓硫酸经过硫酸分配器均匀分流，然后与经过稀释物料分配器分配均匀的稀释物料一起进入稀释换热装置混合稀释，并冷却至70℃～74℃后，再进入反应槽参与反应；硫酸的稀释浓度为68％～75％；所用的稀释物料可以是工艺水或者低浓度硫酸或者含少量磷及硫酸的废水。
CN96101706A 1996-01-05 1996-01-05 湿法磷酸生产中硫酸的槽外稀释工艺 Expired - Fee Related CN1055449C (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN96101706A CN1055449C (zh) 1996-01-05 1996-01-05 湿法磷酸生产中硫酸的槽外稀释工艺

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN96101706A CN1055449C (zh) 1996-01-05 1996-01-05 湿法磷酸生产中硫酸的槽外稀释工艺

Publications (2)

Publication Number Publication Date
CN1153742A CN1153742A (zh) 1997-07-09
CN1055449C true CN1055449C (zh) 2000-08-16

Family

ID=5117216

Family Applications (1)

Application Number Title Priority Date Filing Date
CN96101706A Expired - Fee Related CN1055449C (zh) 1996-01-05 1996-01-05 湿法磷酸生产中硫酸的槽外稀释工艺

Country Status (1)

Country Link
CN (1) CN1055449C (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105060264B (zh) * 2015-08-04 2017-12-22 贵州开磷集团股份有限公司 一种无循环水的二水法湿法磷酸的生产方法
CN105948008A (zh) * 2016-05-05 2016-09-21 瓮福（集团）有限责任公司 一种湿法磷酸高负荷生产时降低反应烟气的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531977A (en) * 1948-01-22 1950-11-28 Allied Chem & Dye Corp Process for manufacture of phosphoric acid
US2699985A (en) * 1950-03-03 1955-01-18 Ind And Financial Ass Inc Apparatus for production of phosphoric acid
US3197280A (en) * 1962-01-11 1965-07-27 Chemical Construction Corp Production of phosphoric acid
CN1062512A (zh) * 1991-10-24 1992-07-08 刘传书 塔式湿法磷酸生产方法及设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531977A (en) * 1948-01-22 1950-11-28 Allied Chem & Dye Corp Process for manufacture of phosphoric acid
US2699985A (en) * 1950-03-03 1955-01-18 Ind And Financial Ass Inc Apparatus for production of phosphoric acid
US3197280A (en) * 1962-01-11 1965-07-27 Chemical Construction Corp Production of phosphoric acid
CN1062512A (zh) * 1991-10-24 1992-07-08 刘传书 塔式湿法磷酸生产方法及设备

Also Published As

Publication number Publication date
CN1153742A (zh) 1997-07-09

Similar Documents

Publication Publication Date Title
US3044851A (en) Production of ammonium phosphates and product thereof
CN104926570B (zh) 一种生产稳定性尿素的方法
US1999026A (en) Production of fertilizers
US3522004A (en) Process and apparatus for producing phosphoric acid from phosphate rock
US3950495A (en) Method for the continuous preparation of stable aqueous ammonium polyphosphate compositions
CN107344715A (zh) 饲料级磷酸二氢钙的生产方法
US3171733A (en) High-analysis ammonium polyphosphate fertilizer
CN1055449C (zh) 湿法磷酸生产中硫酸的槽外稀释工艺
US2614040A (en) Method of ammonization
CN1029517C (zh) 塔式湿法磷酸生产方法及设备
US3813233A (en) Production of suspension fertilizers from wet-process orthophosphoric acids
CN104496624B (zh) 一种生产高塔硝基复合肥的方法及装置
US4132760A (en) Hemihydrate type phosphoric acid process using reduced pressure
US3347656A (en) Production of potassium ammonium polyphosphate solution
IL38214A (en) Apparatus for the production of phosphoric acid
US3022154A (en) Concentrated liquid fertilizers from superphosphoric acid and potassium hydroxide
US4140748A (en) Hemihydrate type phosphoric acid process with crystal modifier
US3249421A (en) Process for manufacturing complex granulated fertilizers
US3264085A (en) High analysis ammonium pyrophosphate process and product
CN106892413A (zh) 微反应器中直接结晶制备磷酸二氢铵的方法
CN203048602U (zh) 一种湿法磷酸生产工业级磷酸一铵的装置
Houston et al. Compound Fertilizers from Rock Phosphate, Nitric Acid and Phosphoric Acids, and Ammonia
CN101838286B (zh) 脂肪醇(醚)磷酸酯的制造方法和设备
IE42012B1 (en) Manufacture of solid ammonium phosphate
US3228752A (en) High-analysis ammonium polyphosphate fertilizer

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: YUNNAN PROV SANHUAN CHEMICAL CO., LTD.

Free format text: FORMER NAME: YUNLAN PHOSPHOR FERTILIZER PLANT

Owner name: YUNNAN PROV YUNTIANHUA INTERNATIONAL CHEMICAL CO.,

Free format text: FORMER NAME: YUNNAN PROV SANHUAN CHEMICAL CO., LTD.

CP03 Change of name, title or address

Address after: No. 1417, Dianchi Road, Xishan District, Yunnan, Kunming Province, China: 650028

Patentee after: Yunnan Yuntianhua International Chemical Co.,Ltd.

Address before: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113

Patentee before: Yunnan Sanhuan chemical Limited by Share Ltd.

Address after: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113

Patentee after: Yunnan Sanhuan chemical Limited by Share Ltd.

Address before: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113

Patentee before: YUNNAN SANHUAN CHEMICAL Co.,Ltd.

Address after: Haikou Yunnan Kunming Sanhuan Chemical Co., Ltd., Xishan District, Yunnan Province, China: 650113

Patentee after: YUNNAN SANHUAN CHEMICAL Co.,Ltd.

Address before: Baita village, Haikou Town, Xishan District, Yunnan City, Kunming Province, China: 650113

Patentee before: Yunnan Phosphate Fertilizer Plant

C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee