CN203877926U - Device for enhancing fluorine recovery rate - Google Patents

Abstract

The utility model relates to a device for enhancing fluorine recovery rate, which comprises a plurality of seal tanks. The device is characterized in that each seal tank is provided with an overflow port; the seal tank overflow ports have uniform altitude and are provided with overflow connecting pipes which are connected with each other; the overflow connecting pipe and the overflow port have the same height; and each seal groove overflow port on the overflow connecting pipe is provided with a butterfly valve. The device effectively lowers the mechanical loss part in the fluorine recovery process, and enhances the fluorine recovery rate.

Description

A kind of device that improves the fluorine rate of recovery

Technical field

The utility model relates to phosphoric acid production technical field, furthermore, relates to the recovery of fluorine element in production process of phosphoric acid, relates in particular to a kind of device that improves the fluorine rate of recovery.

Background technology

In phosphorus ore, contain fluorine, fluorine is useful precious resources, and in production process of phosphoric acid, fluorine element is essential reclaims, and is to produce silicofluoric acid form to reclaim mostly.In Wet-process Phosphoric Acid Production process, part fluorine element is present in dilute phosphoric acid with silicofluoric acid form after reaction, extraction step, and a part is present in reaction flue gas with gaseous form in addition.In follow-up diluted acid concentration process due to the rising of temperature, the reduction of pressure, silicofluoric acid resolves into hydrogen fluoride and silicon tetrafluoride gas, major part is concentrated vacuum system with gaseous form and takes away, minority resides in concentrated acid, in order to ensure that this part gaseous fluorine element can efficient recovery, before spraying tail gas with recirculated water, be provided with multistage fluorine washing, be to obtain silicofluoric acid after water absorbs hydrogen fluoride and silicon tetrafluoride, most domestic producer adopts two-stage washing at present, wherein to wash make up water used be cleaning water or low phosphorus-containing wastewater to secondary, one-level washing washing lotion is secondary washings, after two-stage washing, silicofluoric acid concentration can reach 13%-20% substantially, concrete production concentration is determined by washing time and concentrated load, every grade of washing is all provided with some sealing grooves, washings enters sealing groove, then remove concentration systems.The height of the fluorine rate of recovery depends primarily on internal circulating load and the concentrated load of washing lotion, and most patented technology is all conceived to improve this piece of washing lotion internal circulating load, has ignored the impact of mechanical loss on the fluorine rate of recovery.

In Chinese patent database, also there is no at present and reduce the relevant technical scheme of the mechanical loss raising fluorine rate of recovery.

Summary of the invention

The purpose of this utility model is to overcome the defect of prior art, and a kind of device that improves the fluorine rate of recovery is provided, to reduce the mechanical loss in silicofluoric acid production process.

The technical solution of the utility model is as follows:

A kind of device that improves the fluorine rate of recovery, comprise sealing groove, sealing groove has some, it is characterized in that described sealing groove has overflow port, each sealing groove overflow port absolute altitude is unified, each sealing groove overflow port has overflow connecting tube interconnection, and overflow connecting tube height is consistent with overflow port, and on overflow connecting tube, each sealing groove overflow port place is provided with a butterfly valve.

The utility model, for fluorine washing and recycling system, when use, in the time that each cover washing concentrating is normally driven, keeps each butterfly valve often to open, and ensures overflow mutually between each sealing groove; In the time that an independent series is stopped, close the butterfly valve on sealing groove, stop acid solution and flow in sealing groove.

The utlity model has simple in structure, practical, effective, easy to operate and safe advantage.

The utility model uses proof by reality, reach predetermined object, effectively stop the tankful mechanical loss of fluorine washings, improve the fluorine rate of recovery, bring larger benefit to enterprise, because sealing groove top is provided with overflow spout, avoid tankful to make acid liquid corrosion cell body simultaneously, improved production on-site environment.

The utility model is applicable to fluorine in production process of phosphoric acid and reclaims field.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model;

In figure: 1,2,3 is sealing groove; 4,5,6 is butterfly valve; 7 is overflow connecting tube.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the utility model is further described;

embodiment:

There are three fluorine washing concentrating series in certain factory, sealing groove overflow to fluorine washing has adopted technology of the present utility model, concrete scheme as shown in Figure 1, accompanying drawing 1 has been illustrated structure of the present utility model, a kind of device that improves the fluorine rate of recovery, comprise sealing groove, sealing groove has some, it is characterized in that described sealing groove 1, 2, 3 have overflow port, each sealing groove 1, 2, 3 overflow port absolute altitudes are unified, each sealing groove 1, 2, 3 overflow ports have overflow connecting tube 7 interconnection, overflow connecting tube 7 height are consistent with overflow port, on overflow connecting tube 7, each sealing groove overflow port place is provided with a butterfly valve 4, 5, 6.

In the time that three cover washing concentrating are normally driven, keep three butterfly valves often to open, ensure overflow mutually between each sealing groove; In the time that an independent series is stopped, close the butterfly valve on sealing groove, stop acid solution and flow in sealing groove.

Operation is very easy for the utility model, and reliable, effect is fine, has improved the rate of recovery of fluorine.

Claims (1)

1. one kind is improved the device of the fluorine rate of recovery, comprise sealing groove, sealing groove has some, it is characterized in that described sealing groove has overflow port, each sealing groove overflow port absolute altitude is unified, each sealing groove overflow port has overflow connecting tube interconnection, and overflow connecting tube height is consistent with overflow port, and on overflow connecting tube, each sealing groove overflow port place is provided with a butterfly valve.