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Processing technology of polymeric ferric sulfate

A technology for polymerizing ferric sulfate and processing technology, applied in the direction of ferric sulfate, etc., can solve the problems of inconvenient installation and disassembly of the filter screen, the modifier has no adsorption effect, and the nitrite ion is easy to exceed the standard, and achieves a large degree of molecular polymerization. , the effect of improving flocculation performance and shortening reaction time

Inactive Publication Date: 2018-12-25
马鞍山健鼎化工有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] But have following shortcoming in the processing technology preparation of existing polyferric sulfate: 1, the reaction time is long, and catalyst input amount is bigger, for NaNO 2 Catalyst, due to its own carcinogenic effect and large dosage, the nitrite ion in the product is easy to exceed the standard; thus resulting in a relatively long process time; a large amount of nitrogen oxides will be produced during the reaction to pollute the environment; 2. There is no effect on the polymerization Ferric sulfate is modified to improve its adsorption, and the modifier effect does not have adsorption, thereby improving the adsorption of polyferric sulfate; 3. There is no filter equipment, which can improve the purity of polyferric sulfate liquid, and the filter equipment does not Easy to install and remove the filter

Method used

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  • Processing technology of polymeric ferric sulfate
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Embodiment 1

[0032] A processing technique for polyferric sulfate, comprising the following steps:

[0033] 1) Add 300Kg of tap water to the closed reaction kettle, then start stirring, slowly add 0.9t of ferrous sulfate heptahydrate, and add 100Kg of the required dilute titanium white acid under the condition of stirring. After adding, heat the closed reaction kettle with steam, stop feeding steam after heating up to 30°C, and close the steam valve after the ferrous sulfate heptahydrate is completely dissolved, and open the cooling circulating water outlet valve;

[0034] 2) After stirring for 5 minutes, stop stirring, open the bottom valve of the closed reaction kettle, open the inlet and outlet valves of the circulation pump, and turn on the circulation pump. For the first time, 10Kg of solid sodium nitrite and 500g of sodium iodide are prepared into a solution, and then poured into the closed reaction kettle Add in, stir and mix evenly, the stirring time is 20 minutes, and carry out ta...

Embodiment 2

[0045] A processing technique for polyferric sulfate, comprising the following steps:

[0046] 1) Add 350Kg of tap water to the closed reaction kettle, then start stirring, slowly add 1.1t of ferrous sulfate heptahydrate, and add 120Kg of the required dilute titanium white acid under the condition of stirring, and the waste dilute titanium white acid is 15 minutes After adding, heat the closed reaction kettle with steam, stop feeding steam after heating up to 35°C, and close the steam valve after ferrous sulfate heptahydrate is completely dissolved, and open the outlet valve of cooling circulating water;

[0047] 2) After stirring for 5 minutes, stop stirring, open the bottom valve of the closed reaction kettle, open the inlet and outlet valves of the circulation pump, and turn on the circulation pump. For the first time, 10Kg of solid sodium nitrite and 500g of sodium iodide are prepared into a solution, and then poured into the closed reaction kettle Add in, stir and mix eve...

Embodiment 3

[0058] A processing technique for polyferric sulfate, comprising the following steps:

[0059] 1) Add 330Kg of tap water to the closed reaction kettle, then start stirring, slowly add 1t of ferrous sulfate heptahydrate, and add 110Kg of the required dilute titanium white acid under the condition of stirring, and add the dilute titanium white acid in 15 minutes After finishing, heat the closed reaction kettle with steam, stop feeding the steam after heating up to 35°C, until the ferrous sulfate heptahydrate is completely dissolved, close the steam valve, and open the cooling circulating water outlet valve;

[0060] 2) After stirring for 5 minutes, stop stirring, open the bottom valve of the closed reaction kettle, open the inlet and outlet valves of the circulation pump, and turn on the circulation pump. For the first time, 10Kg of solid sodium nitrite and 500g of sodium iodide are prepared into a solution, and then poured into the closed reaction kettle Add in, stir and mix ev...

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Abstract

The invention discloses a processing technology of polymeric ferric sulfate. The processing technology of the polymeric ferric sulfate comprises the steps of adding 300-350 Kg of running water in a closed reactor, then beginning to stir, slowly feeding 0.9-1.1 t of ferrous sulfate heptahydrate, adding 100-120 Kg of required titanium dioxide waste dilute acid while stirring within 10-15 minutes, heating the closed reactor with steam, stopping feeding the steam after heating to the temperature of 30-35 DEG C, closing a steam valve after the ferrous sulfate heptahydrate is totally dissolved, andopening a cool circulating water outlet valve; and after stirring for 5 min, stopping stirring, opening a bottom valve of the closed reactor, and opening an inlet and outlet valve of a circulating pump. The reaction time of the polymeric ferric sulfate prepared by the process is short, the amount of the fed catalyst is small, by arrangement of filter equipment, the purity of polymeric ferric sulfate liquid can be improved, and a filter screen is assembled on the filter equipment and disassembled from the filter equipment conveniently.

Description

technical field [0001] The invention relates to the technical field of polyferric sulfate, in particular to a processing technology of polyferric sulfate. Background technique [0002] Polymerized ferric sulfate (PFS), also known as hydroxyferric sulfate, is a new type of inorganic polymer flocculating water purifier first developed by Japan Iron Mining Co., Ltd. in 1976. Its general formula is [Fe 2 (OH) n (SO 4 ) 3-n / 2 ] m , where n>2, m<10, the solution contains a large amount of [Fe(OH) 3 ] 3+ , [Fe 3 (OH) 6 ] 3+ Such as high-valent polynuclear polymers, these ions have a strong ability to neutralize the charge on suspended particles, can reduce the potential of micelles, and its higher potential can stabilize the glue and hydrolyze it into flocculent hydroxyl iron compounds. It has a large specific surface area and strong adsorption capacity. Compared with other water purifiers, polyferric sulfate has the advantages of low production cost, less dosage i...

Claims

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Application Information

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IPC IPC(8): C01G49/14
CPCC01G49/14
Inventor 沈玉鹏
Owner 马鞍山健鼎化工有限公司
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