CN106348264A - Device for countercurrent recovering phosphoric acid from chemical activation material - Google Patents

Abstract

The invention relates to a device for countercurrent recovering phosphoric acid from a chemical activation material. The device is formed by serially connecting a plurality of cylindrical recycling bins through anti-acid stainless steel tubes. Water is fed from the lower part of the first recycling bin along a tangential direction, water is discharged from the upper part of the first recycling bin along a radial direction, water is fed from the lower part of the second recycling bin along a tangential direction, and so on, and water is finally discharged from the upper part of the recycling bin at the tail end along a radial direction, flows into a phosphoric acid recovery liquid storage tank, and is infiltrated into a phosphoric acid preparation tank through an anti-acid pump so as to be used for preparing an activating agent phosphoric acid solution. The outer shells of the recycling bins are made of 316L stainless steel, the inner diameter of each recycling bin is 1.2 to 1.5m, the height of each bin is 2.5 to 3.0m, an acid-resisting and heat-resisting casting layer is casted in each bin, the thickness of each casting layer is 5 to 6cm, and each shell and the corresponding casting layer are connected into a whole; each recycling bin is provided with an activation material discharge outlet, a water outlet, an activation material feeding hole, a movable cover plate, a high-pressure material flushing water pipe joint and a water inlet. The bottom surface of each recycling bin is casted to have an appropriate slope, so that an activation material can be conveniently flushed into a filter vat by water through the discharge outlets.

Description

The device of phosphoric acid is countercurrently reclaimed in a kind of chemically method activated material

First, technical field

The present invention relates to the equipment of producing activated carbon by chemical method, countercurrently reclaim the device of phosphoric acid especially from activated material.

2nd, background technology

The activated carbon of wood material chemical method such as zinc chloride process or phosphoric acid method production has micropore and central hole structure prosperity, Activated carbon surface contains chemical active radical, high adsorption capacity, can adsorb the material of bigger molecule, has stronger adaptability, tool There is wide purposes.Activator phosphoric acid in wood material is in activation process because the effect by high temperature is converted into pyrophosphoric acid h₄p₂o₇With Metaphosphoric acid hpo₃And be present in activated material, need to wash activated material with water logging, by the pyrophosphoric acid in activated material and inclined phosphorus Acid is dissolved in water and is converted into orthophosphoric acid h₃po₄, it is used further to prepare activator phosphoric acid solution.At present, activated material reclaims the side of phosphoric acid Method is such that to pour activated material into the appropriate time that is soaked in water in rustless steel recycling bin, and embathes repeatedly, obtains variable concentrations Phosphoric acid recovered liquid, then activated material is discharged in rinsing bath and is rinsed and be filtered dry.This method has the disadvantage in that one is Because the temperature of activated material is high, at least more than 300 DEG C, it is impregnated in water rear mixture temperature at 70～80 DEG C, activated material In pyrophosphoric acid and Metaphosphoric acid change into phosphoric acid solution, rustless steel recycling bin can be corroded in the presence of hot acid solution, make Not long with the life-span；Two is to reclaim phosphoric acid liquid to leach by reclaiming the filter screen of bottom of the barrel, and the rate of filtration is slower；Three is to reclaim phosphoric acid Activated material afterwards needs to be flushed to rinsing bath with water and rinses and be filtered dry, it appears pretty troublesome, low production efficiency, high labor intensive.For carrying The automaticity of high phosphorus acid recovery operation and production efficiency, the service life of extension device, reclaims phosphoric acid from activated material Equipment must be high temperature resistant, corrosion-resistant.According to this background, invention one kind chemically countercurrently reclaims phosphorus in method activated material The device of acid.

3rd, content of the invention

The device of phosphoric acid is countercurrently reclaimed, it is used by multiple cylinder recycling bins in chemically method activated material of the present invention Acid-resistant stainless steel pipe is in series, and the outlet of first recycling bin is coupled with the water inlet pipe of second recycling bin, and sets Put control valve, tangentially intake below first recycling bin, from the upper side radially water outlet, then from second recycling bin Lower section along butt to water inlet, the like, finally above the recycling bin of end radially water outlet and flow into phosphoric acid recovered liquid storage In groove, squeeze in phosphoric acid preparation pond through acid-proof pump and be used for preparing activator phosphoric acid solution；The water inlet pipe of each recycling bin Directly couple with hopper and control valve is set.This recycling bin shell body is made with 316l rustless steel, its internal diameter be 1.2～ 1.5 meters, bucket is high 2.5～3.0 meters, pours into a mould the kp pouring layer of acid-resistant and anti-high-temperature inside bucket, and cast layer thickness is 5～6 centimetres, makes Housing is joined together with pouring layer, and this recycling bin is provided with activated material discharge port (6), outlet (10), activated material addition mouth (11), removable cover (12), high pressure slug waterpipe jointing (13) and water inlet (14).This recycling bin bottom surface pours into suitably oblique Degree, to be flushed to activated material in rinsing filter vat by discharge port (6) with water.In chemically method activated material of the present invention Adverse current reclaims the device of phosphoric acid, and it is higher to have gained phosphoric acid recovered liquid concentration, using water wisely and the high advantage of the phosphoric acid response rate, both Can be used for reclaiming phosphoric acid from activated material it can also be used to pit shell phosphoric acid method produces during bamboo wood chip phosphoric acid method production powdered activated carbon Reclaim phosphoric acid from activated material during unsetting granular active carbon.

4th, brief description

Fig. 1 is the device schematic flow sheet countercurrently reclaiming phosphoric acid in chemically method activated material of the present invention, and (1) is phosphoric acid Recovered liquid storage tank；(2) use boiler for recovery；(3) it is to reclaim water metering table；(4) it is control valve；(5) return for phosphoric acid Receive bucket.Fig. 2 is the cross section structure diagram of phosphoric acid recycling bin, and (6) are activated material discharge port；(7) it is quick operating valve；(8) it is phosphoric acid Reclaim barrel shell, made with 316l rustless steel；(9) it is acid-resisting pouring layer, with acidproof, resistant to elevated temperatures kp cementing material cast Become；(10) it is outlet；(11) add mouth for activated material；(12) it is removable cover；(13) it is high pressure slug waterpipe jointing.Fig. 3 For a-a cross section structural representation in Fig. 2, (14) are water inlet；Remaining part illustrates ibid.

5th, specific embodiment

The device of phosphoric acid is countercurrently reclaimed, it is by multiple cylinder recycling bins with resistance in chemically method activated material of the present invention Sour stainless steel tube is in series, the operation that phosphoric acid is reclaimed to activated material be such that the activated material of self-activation stove in future according to Secondary be added in each recycling bin close to outlet (10) place, when activated material installs last recycling bin, open first recovery The inlet valve of bucket, is intake to first recycling bin with suitable flow velocity, and its water level gradually rises up to just pass through connecting tube during outlet Flow into second recycling bin, the rest may be inferred, reclaim when recovered liquid flows out and begins to flow into phosphoric acid from the recycling bin outlet of end Stop during liquid storage tank intaking to first recycling bin, make into intake and reset gauge table (3) to second recycling bin, open head simultaneously The discharge port (6) of individual recycling bin, opens high-pressure hydraulic pump, with water under high pressure, activated material is flushed in filter vat after being rinsed and being filtered dry It is discharged to that rickyard is to be dried, the recycling bin unsnatching activated material waits next group activated material to reclaim phosphoric acid.When water metering table (3) Water consumption reaches the water inlet stopping second recycling bin when reclaiming bucket volume, makes into intake and reset metering to the 3rd recycling bin Table (3), opens the discharge port (6) of second recycling bin simultaneously, with water under high pressure, activated material is flushed in filter vat and is rinsed simultaneously It is discharged to after being filtered dry that rickyard is to be dried, the recycling bin unsnatching activated material waits next group activated material to reclaim phosphoric acid, and the rest may be inferred.When Activated material in last recycling bin terminates reclaimer operation, and when filling second activated material to be recycled, according to above-mentioned mistake Cheng Jinhang reclaims the operation of phosphoric acid for second.It is exactly that so circulation carries out above-mentioned recovery phosphoric acid in daily producing in activated carbon Operation.

Claims (2)

1. countercurrently reclaim the device of phosphoric acid in a kind of chemically method activated material, it is characterized in that: it is used by multiple cylinder recycling bins Acid-resistant stainless steel pipe is in series, and the outlet of first recycling bin is coupled with the water inlet pipe of second recycling bin, and sets Put control valve, tangentially intake below first recycling bin, from the upper side radially water outlet, then from second recycling bin Lower section along butt to water inlet, the like, finally above the recycling bin of end radially water outlet and flow into phosphoric acid recovered liquid storage In groove；The water inlet pipe of each recycling bin is directly coupled with hopper and arranges control valve.

2. countercurrently reclaim the device of phosphoric acid in a kind of chemically method activated material according to claim 1, it is characterized in that: reclaim Bucket shell body is made with 316l rustless steel, and its internal diameter is 1.2～1.5 meters, and bucket is high 2.5～3.0 meters, pours into a mould acidproof resistance to height in bucket The kp pouring layer of temperature, cast layer thickness is 5～6 centimetres, so that housing is joined together with pouring layer, this recycling bin is provided with activated material Discharge port (6), outlet (10), activated material add mouth (11), removable cover (12), high pressure slug waterpipe jointing (13) and water inlet Mouth (14), this recycling bin bottom surface pours into suitable gradient, filters in order to activated material is flushed to rinsing by discharge port (6) with water In bucket.