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Iron phosphate wastewater treatment system and treatment method

A wastewater treatment system, iron phosphate technology, applied in water/sewage treatment, natural water treatment, water treatment parameter control, etc., can solve the problem of ineffective treatment of iron phosphate wastewater

Pending Publication Date: 2022-03-18
中膜(浙江)环保科技有限公司
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Problems solved by technology

[0004] The present invention mainly provides a treatment system and method for iron phosphate wastewater in order to overcome the defect that the iron phosphate wastewater cannot be effectively treated in the prior art

Method used

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  • Iron phosphate wastewater treatment system and treatment method
  • Iron phosphate wastewater treatment system and treatment method
  • Iron phosphate wastewater treatment system and treatment method

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Embodiment 1

[0065] The composition of the ferric phosphate wastewater treated in this example is shown in Table 1 below. The ferric phosphate wastewater to be treated in this embodiment is the washing liquid and mother liquor produced by the ferric phosphate production process, and is concentrated until the mass concentration of the solute is 16%.

[0066] Table 1

[0067] serial number project value 1 NH 4 +

45251mg / L 2 PO 4 3-

17844mg / L 3 SO 4 2-

109329mg / L 4 TDS 172800mg / L 5 pH 5±0.2 6 Inlet water temperature 35℃±1℃ 7 boiling point 91℃±2℃

[0068] The effect of the device adopted in the present embodiment is shown in table 2 below

[0069] Table 2

[0070]

[0071]

[0072] 1, the present embodiment provides a kind of ferric phosphate wastewater treatment system, as figure 1 Shown is a schematic flow chart of the iron phosphate wastewater treatment system in this embodiment. figure 2 It ...

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Abstract

The invention discloses an iron phosphate wastewater treatment system and treatment method. The iron phosphate wastewater treatment system comprises a preheating unit, a falling film evaporation unit, a forced circulation crystallization unit and a flash evaporation crystallization unit which are connected in sequence, the forced circulation crystallization unit comprises a forced circulation heater and a forced circulation crystallizer which are connected in sequence; the side wall of the forced circulation crystallizer shell is provided with a mother liquor overflow port, a circulation feeding port and a circulation discharging port from top to bottom, and the circulation discharging port is located at the bottom end; a circulating feeding pipe is nested from the circulating feeding hole to the inner cavity of the shell; the outlet end of the circulating feed pipe is arranged above the mother liquor overflow port; and the flash evaporation crystallization unit comprises a flash evaporation crystallizer, and a feed port of the flash evaporation crystallizer is connected with the mother liquor overflow port. By utilizing the wastewater treatment system, ammonium sulfate and monoammonium phosphate with relatively high purity can be continuously and stably produced, and the separated ammonium sulfate and monoammonium phosphate are used as raw materials of industrial nitrogen fertilizer and compound fertilizer.

Description

technical field [0001] The invention relates to an iron phosphate wastewater treatment system and a treatment method. Background technique [0002] Iron phosphate is the precursor for the production of iron phosphate cathode materials. With the rapid development of the electric vehicle industry, the market demand for iron phosphate is increasing, and the demand for battery-grade iron phosphate raw materials is also increasing year by year. A large amount of waste water is produced in the production process of ferric phosphate. According to the estimation of Guangxi Xinjing Technology Co., Ltd.’s pilot production of battery-grade ferric phosphate, about 50 tons of waste water will be generated for every ton of battery-grade ferric phosphate produced. [0003] Ferric phosphate production wastewater has the characteristics of high sulfate concentration, high ammonium ion concentration, high total phosphorus concentration and low pH. At present, lime pretreatment + evaporation i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/02C02F1/04C02F1/06C02F1/08C02F1/00C01B25/28C01C1/24C02F103/34C02F101/10C02F101/20
CPCC02F9/00C02F1/04C02F1/02C02F1/08C02F1/06C02F1/008C01B25/28C01C1/24C02F2101/105C02F2101/203C02F2103/34C02F2209/02
Inventor 周海明唐二松刘根廷杨栋君陈明波周天睿陈志刚
Owner 中膜(浙江)环保科技有限公司
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