CN104528767A - Method and device for conveying mirabilite material in mirabilite production section employing formic acid - Google Patents
Method and device for conveying mirabilite material in mirabilite production section employing formic acid Download PDFInfo
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- CN104528767A CN104528767A CN201410810015.4A CN201410810015A CN104528767A CN 104528767 A CN104528767 A CN 104528767A CN 201410810015 A CN201410810015 A CN 201410810015A CN 104528767 A CN104528767 A CN 104528767A
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- mirabilite
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Abstract
The invention relates to a method for conveying a mirabilite material in a mirabilite production section employing formic acid. The method comprises the following steps: a, drying the mirabilite material in a mirabilite section dryer, discharging the material to a stock bin, conveying an emptying gas at the top end of the stock bin to a tail gas absorption tower, and carrying out tail gas absorption treatment; b, stirring the mirabilite material to prevent agglomeration, and enabling the mirabilite material to flow into a lower continuous pulverized coal conveyor; c, starting a roots blower to ensure that the pressure of air entering the continuous pulverized coal conveyor is 0.2-1MPa, conveying the mirabilite material to the stock bin, and conveying the emptying tail gas in the stock bin to a tail gas absorption tower; and d, when the mirabilite material in the stock bin reaches 1/2 of volume of the stock bin, starting stirring and providing circulating water to cool the mirabilite in the stock bin, cutting off the stirring and the circulating water at 40-50 DEG C, and canning mirabilite. The method has the advantages that an air source adopts the roots blower, so that the electricity consumption is low; the mirabilite material is conveyed in a closed pipeline, so that no smell is generated; the labor resource is saved; and the operation cost and the environmental pollution are greatly reduced.
Description
Technical field:
The present invention relates to production method and the device of formic acid, particularly a kind of formic acid produces method and the device of saltcake workshop section conveying saltcake material.
Background technology:
Formic acid, also known as formic acid, in chemical industry, formic acid be used to rubber, medicine, fuel, leather kind industry.Along with greatly developing of China's livestock industry, formic acid will have larger potential market as the storage agent of silage and farm crop, mould inhibitor.Along with domestic to the great attention of environmental protection, the application market prospect of formic acid in the industry such as process hides and printing and dyeing is better.
The synthetic method of formic acid is a lot, at present domestic and international usual sodium formate method, methyl formate hydrolysis method, light oil liquid phase oxidation etc.Current use sodium formate method produces formic acid, and this method cost is low, easy to operate, and the solid slag of generation and sodium sulfate are a kind of important chemical industry supplementary material equally, sells as byproduct packaging.
Main reaction process:
2HCOONa+H2SO4 (dense)===2HCOOH+Na2SO4
(process need lower than 60 DEG C, otherwise H2SO4 can catalysis HCOOH decompose)
In this method, formic acid enters three grades of absorption units by distillation under vacuum first in gaseous form after the operation process such as acidifying, distillation, purification, can enter in concentrated acid or dilute acid bath after concentration is qualified, sells to reasonable concentration storage finally by allotment.
Existing formic acid produces saltcake workshop section, saltcake is delivered to blower fan charging airduct one end by cage by the discharging of acidifying still, with the air quantity in a few all places, saltcake material is taken away, utilize cyclonic separator to be separated simultaneously, saltcake material saltcake falls into feed bin, its dust is through pulse dust collector dedusting, and a large amount of tail gas absorbs process by three grades of absorption towers.The method technology is single, by fan delivery, saltcake material is siphoned away, a large amount of tail gas must be produced will process, control site environment that can not be fully effective, and the saltcake temperature of charge that rake type drier is released is at about 120 DEG C, the saltcake smell given out in discharging process brings pollution to a certain degree to operating environment.Simultaneously blower fan and cage frequency of maintenance higher, equipment use electric energy consumption is high, does not find associated solutions through extensive search.
Summary of the invention:
Object of the present invention is exactly to overcome in prior art the shortcoming that the whole system sealing effectiveness carrying saltcake material to exist is poor, use electric energy consumption is high, and a kind of formic acid of proposition produces method and the device of saltcake workshop section conveying saltcake material.
To achieve these goals, the present invention adopts following technical scheme:
Formic acid produces a method for saltcake workshop section conveying saltcake material, it is characterized in that comprising the following steps:
A, be discharged to feed bin after the saltcake dry materials in saltcake workshop section drying machine, feed bin top emptying gas is delivered in tail gas absorber through induced draft fan, through three grades of falling film absorbing devices, carries out absorption vent gas treatment;
B, open feed bin stirrer to saltcake material carry out stirring prevent caking, by saltcake material flow into bottom continuous packing auger in;
C, startup Root's blower, regulate blower export blast, ensures to enter continuous packing auger blast at 0.2-1Mpa, saltcake material is delivered in warehouse, warehouse emptying end gas is delivered in tail gas absorber, through three grades of falling film absorbing devices, carries out absorption vent gas treatment;
D, when in warehouse, saltcake material reaches 1/2 of warehouse volume, start stir, open recirculated water in storehouse saltcake cooling, when in storehouse, temperature is down to 40-50 DEG C, close stir and recirculated water, open warehouse bottom discharge valve, with the canned saltcake of jumbo bag.
After a, b, c step, a whole set of saltcake delivery system utilizes the energy of air-flow, and along powder conveying direction conveying granular saltcake material in closed conduit, this delivery system structure is simple, easy to operate, save labor and bring certain economic benefit to formic acid device.
Present invention also offers the device that a kind of formic acid produces saltcake workshop section conveying saltcake material, comprising:
A, saltcake workshop section three drying machine drain holes are connected in parallel to feed bin, and feed bin blow-down pipe is connected with three grades of absorption towers, and feed bin bottom valve is connected with continuous packing auger import, have installed the stirrer of a band rake teeth in feed bin;
B, Roots blower outlet have installed a sound damper, silencing end is connected with continuous packing auger import, continuous packing auger outlet is connected in warehouse by pipeline, and warehouse drain pipe is connected to three grades of absorption towers, and warehouse is provided with chuck heat sink and installs a post-type mixer.
In technique scheme, saltcake is delivered in warehouse by air-flow along closed conduit by continuous packing auger, and warehouse drain is connected to three grades of absorption towers, a vertical mixing installed by warehouse, simultaneously with chuck heat sink, this system has reclaimed saltcake discharging smell substantially completely, reduces production cost.
The invention has the advantages that: the investment of this appliance arrangement is little, good airproof performance is reliable, without stifled, leakage phenomenon, and long service life.Energy-saving and cost-reducing, source of the gas adopts roots blower, and power consumption is little, and in closed conduit, conveying saltcake material odorlessness produces, and save human resources, running cost and environmental pollution significantly reduce.
Accompanying drawing illustrates:
Fig. 1 is the plant system drawing that a kind of formic acid of the present invention produces saltcake workshop section conveying saltcake material.
Embodiment:
As shown in Fig. 1, the invention provides the device that a kind of formic acid produces saltcake workshop section conveying saltcake material, this device comprises:
A, saltcake workshop section three drying machine drain holes are connected in parallel to feed bin, and feed bin blow-down pipe is connected with three grades of absorption towers, and feed bin bottom valve is connected with continuous packing auger import, have installed the stirrer of a band rake teeth in feed bin;
B, Roots blower outlet have installed a sound damper, silencing end is connected with continuous packing auger import, continuous packing auger outlet is connected in warehouse by pipeline, and warehouse drain pipe is connected to three grades of absorption towers, and warehouse is provided with chuck heat sink and installs a post-type mixer.
A kind of formic acid provided by the invention produces the method for saltcake workshop section conveying saltcake material, comprises the following steps:
The saltcake material parallel connection of a, saltcake workshop section three drying machine evaporates to dryness is put in feed bin, and in blowing process, tail gas three grades of absorption towers absorb process;
B, open feed bin stirrer to saltcake material carry out stirring prevent caking, saltcake material in feed bin is slowly put into continuous packing auger import;
C, startup Root's blower, regulate blower export blast, ensures to enter continuous packing auger blast at 0.2-1Mpa, saltcake material is delivered in warehouse, warehouse emptying end gas is delivered in tail gas absorber, through three grades of falling film absorbing devices, carries out absorption vent gas treatment;
D, when in warehouse, saltcake material reaches 1/2 of warehouse volume, start stir, open recirculated water in storehouse saltcake cooling, when in storehouse, temperature is down to 40-50 DEG C, close stir and recirculated water, open warehouse bottom discharge valve, with the canned saltcake of jumbo bag.
Continuous powder feeding machine is a kind of conventional energy-conservation, efficient, low pressure, continuous conveying device, be made up of four major portions such as nozzle, cylindrical pump, jet-conditioning unit, bottom gasification installations, packing auger utilizes gas flow jet effect, makes air driven powder grain material deliver to terminal library.The material of conveying enters in the pump housing by material envelope storehouse, material in the pump housing is through the fluidisation gas tank fluidization of pump housing bottom, pressurized air enters diffusive mixing room by air main through nozzle at high speeds, in the pump housing, the material of fluidisation enters diffusive mixing room and mixes with air-flow under the material pressure of material and the negative pressure acting in conjunction of nozzle in material envelope storehouse, is carried along Cemented filling to terminal material storehouse by air-flow.
The discharging of original formic acid saltcake workshop section utilizes the corresponding auger of three drying machines, by auger, saltcake material is delivered to high pressure positive blower wind and send pipe import, utilize high pressure air quantity to absorb in airduct by saltcake material simultaneously, feed bin is fallen into through cyclonic separator saltcake material, and a large amount of tail gas goes to process in three grades of absorption towers, due to the large three grades of absorption tower poor processing effect of air quantity, on-the-spot scent of in discharging process is caused to produce.Auger is when carrying saltcake material, and because auger design does not match with three drying machine loads, cause in feeding process, drying machine drain hole and auger ingress produce malleation, and on-the-spot scent of overflows.In feed bin, discharging per tour needs 5 operator, and after transformation, Pneumatic conveyer power consumption is little, and in closed conduit, conveying saltcake material odorlessness produces, and save human resources, per tour only needs 2-3 operator simultaneously.
Claims (2)
1. formic acid produces a method for saltcake workshop section conveying saltcake material, it is characterized in that comprising the following steps:
A, be discharged to feed bin after the saltcake dry materials in saltcake workshop section drying machine, feed bin top emptying gas is delivered in tail gas absorber through induced draft fan, through three grades of falling film absorbing devices, carries out absorption vent gas treatment;
B, open feed bin stirrer to saltcake material carry out stirring prevent caking, by saltcake material flow into bottom continuous packing auger in;
C, startup Root's blower, regulate blower export blast, ensures to enter continuous packing auger blast at 0.2-1Mpa, saltcake material is delivered in warehouse, warehouse emptying end gas is delivered in tail gas absorber, through three grades of falling film absorbing devices, carries out absorption vent gas treatment;
D, when in warehouse, saltcake material reaches 1/2 of warehouse volume, start stir, open recirculated water in storehouse saltcake cooling, when in storehouse, temperature is down to 40-50 DEG C, close stir and recirculated water, open warehouse bottom discharge valve, with the canned saltcake of jumbo bag.
2. formic acid produces a device for saltcake workshop section conveying saltcake material, it is characterized in that comprising:
A, saltcake workshop section three drying machine drain holes are connected in parallel to feed bin, and feed bin blow-down pipe is connected with three grades of absorption towers, and feed bin bottom valve is connected with continuous packing auger import, have installed the stirrer of a band rake teeth in feed bin;
B, Roots blower outlet have installed a sound damper, silencing end is connected with continuous packing auger import, continuous packing auger outlet is connected in warehouse by pipeline, and warehouse drain pipe is connected to three grades of absorption towers, and warehouse is provided with chuck heat sink and installs a post-type mixer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410810015.4A CN104528767B (en) | 2014-12-24 | 2014-12-24 | A kind of formic acid produces method and the device of saltcake workshop section conveying saltcake material |
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| CN201410810015.4A CN104528767B (en) | 2014-12-24 | 2014-12-24 | A kind of formic acid produces method and the device of saltcake workshop section conveying saltcake material |
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| CN104528767A true CN104528767A (en) | 2015-04-22 |
| CN104528767B CN104528767B (en) | 2016-03-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773678A (en) * | 2018-07-16 | 2018-11-09 | 芜湖辉林奥远自动化科技有限公司 | A kind of high efficiency pneumatic conveying equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090104106A1 (en) * | 2007-10-17 | 2009-04-23 | James Logan Fairchild | Separation of Purified Potassium Sulfate from Glaserite |
| CN201952381U (en) * | 2010-12-23 | 2011-08-31 | 安徽金禾实业股份有限公司 | Mirabilite collection device for formic acid production by using sodium formate method |
| CN102515206A (en) * | 2011-10-31 | 2012-06-27 | 中冶京诚工程技术有限公司 | Technological method and equipment for extracting mirabilite |
| CN103752139A (en) * | 2013-12-26 | 2014-04-30 | 安徽金禾实业股份有限公司 | Formic acid acidification working section tail gas absorption device and absorption method |
-
2014
- 2014-12-24 CN CN201410810015.4A patent/CN104528767B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090104106A1 (en) * | 2007-10-17 | 2009-04-23 | James Logan Fairchild | Separation of Purified Potassium Sulfate from Glaserite |
| CN201952381U (en) * | 2010-12-23 | 2011-08-31 | 安徽金禾实业股份有限公司 | Mirabilite collection device for formic acid production by using sodium formate method |
| CN102515206A (en) * | 2011-10-31 | 2012-06-27 | 中冶京诚工程技术有限公司 | Technological method and equipment for extracting mirabilite |
| CN103752139A (en) * | 2013-12-26 | 2014-04-30 | 安徽金禾实业股份有限公司 | Formic acid acidification working section tail gas absorption device and absorption method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108773678A (en) * | 2018-07-16 | 2018-11-09 | 芜湖辉林奥远自动化科技有限公司 | A kind of high efficiency pneumatic conveying equipment |
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| CN104528767B (en) | 2016-03-16 |
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