CN217189474U

CN217189474U - Device for producing magnesium hydroxide from magnesium ammonium phosphate

Info

Publication number: CN217189474U
Application number: CN202123357961.2U
Authority: CN
Inventors: 田承涛; 肖林波; 廖秋实
Original assignee: Yichang Shengchuangxin Material Co ltd
Current assignee: Yichang Shengchuangxin Material Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-08-16
Anticipated expiration: 2031-12-29

Abstract

A device for producing magnesium hydroxide by magnesium ammonium phosphate comprises a charging hopper, a mixed acidification tank, a reaction kettle, a belt filter, a washing tank and an ammonium phosphate mother liquor tank; the loading hopper is through the mixed acidizing groove of first conveyer switch-on, mixed acidizing groove is through first pipeline and reation kettle switch-on, the reation kettle bottom is through second pipeline and belt filter intercommunication, the filter cake that the belt filter crossed the filtration and is carried to the assigned place by the second conveyer, the filter liquor that the belt filter crossed the filtration is sent into the ammonium phosphate mother liquor groove, the switch-on has sour liquid pipe on mixed acidizing groove, the intercommunication has wash pipe on the belt filter, belt filter washes the water and flows into the washing water inslot, all the switch-on has the slush pump on first pipeline and second pipeline, the switch-on has the intake pipe on reation kettle, the utility model discloses can withdraw the filter-pressing sediment that contains magnesium ammonium phosphate and utilize.

Description

Device for producing magnesium hydroxide from magnesium ammonium phosphate

Technical Field

The utility model relates to a device for producing magnesium hydroxide by magnesium ammonium phosphate.

Background

Waste water that produces in phosphorus chemical industry sewage treatment system is earlier through calcium, P, F and ammonia nitrogen in the magnesia mixture takes off the scrubbing sewage, then carry out the filter-pressing with waste water again, contain the magnesium ammonium phosphate solid in the filter-pressing sediment that filter-pressing was filtered out, if can the polluted environment with these filter-pressing sediment direct discharge, develop a device that can carry out recycle with the filter-pressing sediment based on this needs, so not only can reduce the waste water sediment to environmental pollution, and let the recovery thing have certain economic value, and then can reduce the sewage treatment cost to a certain extent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device of magnesium hydroxide is produced to magnesium ammonium phosphate can withdraw the utilization with the filter-pressing sediment that contains magnesium ammonium phosphate.

In order to solve the above problem, the technical scheme of the utility model is that:

a device for producing magnesium hydroxide by magnesium ammonium phosphate comprises a charging hopper, a mixed acidification tank, a reaction kettle, a belt filter, a washing tank and a ammonium phosphate mother liquor tank; the loading hopper is through the mixed acidizing groove of first conveyer switch-on, the mixed acidizing groove is through first pipeline and reation kettle switch-on, the reation kettle bottom is through second pipeline and belt filter intercommunication, the filter cake that the belt filter crossed the filtration and is carried to the appointed place by the second conveyer, the filter liquor that the belt filter crossed the filtration is sent into the ammonium phosphate mother liquor groove, the switch-on has sour liquid pipe on mixing acidizing groove, the intercommunication has the wash pipe on the belt filter, the belt filter washes the water and flows into the washing inslot, it has the slush pump all to switch-on first pipeline and second pipeline, the switch-on has the intake pipe on reation kettle.

The beneficial effects of the utility model are that: the device has stable process, the purity of the magnesium hydroxide produced by the device is more than 90 percent, and the magnesium hydroxide produced by the device can be recycled as a denitrifier for sewage treatment, so that the sewage treatment cost can be greatly reduced.

Drawings

The invention will be further explained with reference to the drawings:

fig. 1 is a schematic structural diagram of the present invention.

In the figure: the system comprises a charging hopper 1, a first conveyor 2, a mixed acidification tank 3, a reaction kettle 4, a belt filter 5, a washing water tank 6, a second conveyor 7, an ammonium phosphate mother liquor tank 8, a controller 9, an acid liquor pump 10, a first pipeline 11, a third pipeline 12 and a second pipeline 13.

Detailed Description

As shown in figure 1, the device for producing magnesium hydroxide by magnesium ammonium phosphate comprises a charging hopper 1, a mixed acidification tank 3, a reaction kettle 4, a belt filter 5, a washing water tank 6 and a mother liquid tank 8 of ammonium phosphate, wherein stirring mechanisms are respectively arranged in the mixed acidification tank 3, the washing water tank 6 and the mother liquid tank 8 of ammonium phosphate.

The production process comprises the following steps:

the first step is as follows: adding filter-pressing residues containing magnesium ammonium phosphate into a feeding hopper 1, feeding the filter-pressing residues in the feeding hopper 1 into a mixed acidification tank 3 through a first belt conveyor 2, adding a certain amount of water and dilute hydrochloric acid into the mixed acidification tank 3, stirring and mixing to form slurry, and controlling the addition amount of the dilute hydrochloric acid to ensure that the pH value of the slurry in the mixed acidification tank 3 is between 4 and 5.

The second step: slurry in the mixed acidification tank 3 is sent into the reaction kettle 4 by a slurry pump on a first pipeline 11, gas ammonia is simultaneously fed into the reaction kettle 4 by a gas inlet pipe, the slurry is sent into the belt filter 5 by a slurry pump on a second pipeline 13 after the slurry fully reacts in the reaction kettle 4, and the pH value in the reaction kettle 4 is between 10 and 11.

The third step: in the process of filtering the slurry in the belt filter 5, the washing water pipe carries out three-stage countercurrent washing on the slurry, the washing water flows into the washing water tank 6, and the washing water in the washing water tank 6 is returned to the mixed acidification tank 3 for reuse through the liquid conveying pump on the third pipeline 12; the filter cake pressed out by the belt filter 5 is conveyed by the second belt conveyor 7 to a designated place such as: and in a finished product drying section, the filtrate is conveyed into an ammonium phosphate mother liquor tank 8 and then conveyed to an ammonium phosphate workshop by a pump, wherein a filter cake is a magnesium hydroxide product, and the purity of the magnesium hydroxide product is more than or equal to 90%.

In addition, a PH probe is arranged in the mixed acidification tank 3, an acid liquid pump 10 is communicated with an acid liquid pipe, dilute hydrochloric acid is sent into the mixed acidification tank 3 through the acid liquid pipe, the PH probe is connected with the input end of a controller 9, and the acid liquid pump 10 is connected with the output end of the controller 9. The controller 9 is an Enlaiel-pH 160 economic version pH controller 9 to realize automatic acid adjustment on the wastewater slag slurry, wherein the pH value of the acid adjusting tank is between 4 and 5.

Claims

1. The device for producing magnesium hydroxide by magnesium ammonium phosphate is characterized in that: comprises a charging hopper (1), a mixed acidification tank (3), a reaction kettle (4), a belt filter (5), a washing water tank (6) and an ammonium phosphate mother liquor tank (8); the feed hopper (1) is communicated with the mixed acidification tank (3) through the first conveyor (2), the mixed acidification tank (3) is communicated with the reaction kettle (4) through the first pipeline (11), the bottom of the reaction kettle (4) is communicated with the belt filter (5) through the second pipeline (13), filtered filter cakes of the belt filter (5) are conveyed to a specified place through the second conveyor (7), filtered filtrate of the belt filter (5) is conveyed into the ammonium phosphate mother liquor tank (8), an acid liquor pipe is communicated with the mixed acidification tank (3), a flushing water pipe is communicated with the belt filter (5), flushing water of the belt filter (5) flows into the flushing water tank (6), slurry pumps are communicated with the first pipeline (11) and the second pipeline (13), and an air inlet pipe is communicated with the reaction kettle (4).

2. The apparatus for producing magnesium hydroxide from magnesium ammonium phosphate according to claim 1, wherein: the water washing tank (6) is communicated with the mixed acidification tank (3) through a third pipeline (12), and an infusion pump is communicated with the third pipeline (12).

3. The apparatus for producing magnesium hydroxide from magnesium ammonium phosphate according to claim 2, wherein: a PH probe is arranged in the mixed acidification tank (3), an acid liquid pump (10) is communicated with the acid liquid pipe, the PH probe is connected with the input end of a controller (9), and the acid liquid pump (10) is connected with the output end of the controller (9).