CN107311204B - Ion film caustic soda technology of threonates - Google Patents

Abstract

The invention discloses a kind of ion film caustic soda technology of threonates, include the steps that using five effect vacuum vaporation system salt manufacturing, the five effects vacuum vaporation system includes five evaporators, and five evaporators are followed successively by I effect evaporator, II effect evaporator, III effect evaporator, IV effect evaporator and V effect evaporator along the flow direction from front to back of heating steam；It is characterized by also including content of iodine rate-determining steps, the content of iodine rate-determining steps include V effect evaporator is chosen to be that ion film caustic soda salt produces tank, and V effect evaporator directly into former halogen the step of；The content of iodine rate-determining steps further include the steps that the solid-to-liquid ratio controlled in V effect evaporator is 7-15%.Ion film caustic soda of the invention technology of threonates, which has, to be implemented simple, the advantages of convenient for controlling content of iodine, meets the requirement of ionic membrane film caustic soda salt.

Description

Ion film caustic soda technology of threonates

Technical field

The invention belongs to salt producing craft fields, and in particular to a kind of ion film caustic soda technology of threonates.

Background technique

Salt is the raw material of alkali amine industrial production ammonia (hydrochloric acid is made with salt, after with hydrochloric acid ammonia is made) and soda ash, and Ammonia and soda ash are again respectively the big chemical raw materials of consumption, so, the demand of alkali amine industrial salt is also larger (according to can look into The data arrived are shown: 2012, national 86,600,000 tons of overall consumption salt amount, and alkali amine industrial salt ratio is more than 80%, is reached 70750000 tons).

Salt-making process is NaCl to be precipitated after being concentrated by evaporation using brine as raw material, then become qualified after dehydrating and produce Product.Pass through existing technical literature " summary of salt manufacturing evaporative crystallization technique " (Chinese well mine salt, page 4 to the 7th of the 4th phase of July in 2013 Page) content recorded it is found that currently, salt manufacturing mainly uses " multiple-effect vacuum evaporation production technology ", should " multiple-effect vacuum evaporation production Technique " is: evaporator number is two or more, and brine is added in each evaporator；The heating steam of head effect evaporator is heat The saturated vapor that power station is sent, heat are successively transmitted by each effect secondary steam, the heat source as next effect evaporator.End Effect steam exhaust is discharged in mixing condenser by circulating cooling water condensation, and fixed gas is then pumped to atmosphere by vacuum system.Multiple-effect is steamed In hair, with the increase of effect number, the consumption of unit steam reduces, and reduces operating cost；On the other hand, effect number is more, device Investment cost it is also bigger.Five effects are 10% compared with the raw quantity of steam of quadruple effect saving, be further added by effect number energy-saving effect be not it is obvious that and Installation cost increase is more, therefore domestic Salt Industry is generally five effect vacuum vaporation systems at present.

But existing " multiple-effect vacuum evaporation production technology " still has shortcoming:

Using existing " multiple-effect vacuum evaporation production technology " because in production process without going out iodine technique, and in production process Mother liquor in each effect evaporator will reuse, each mother liquor imitated in evaporator production process to reuse (" mother liquor " be Remaining saturated solution after precipitating or crystal is isolated in crystallization process) and be gradually concentrated, so that the content of iodine in liquid in pipe It is increased to 10-20mg/L, is unable to satisfy the requirement (iodine≤1mg/kg) of ionic membrane film caustic soda salt.

Based on this, applicant consider to design it is a kind of implement simple, convenient for controlling content of iodine, meet ionic membrane film burning The ion film caustic soda technology of threonates of the requirement of alkali salt.

Summary of the invention

In view of the above shortcomings of the prior art, the technical problems to be solved by the present invention are: how to provide a kind of implementation letter It is single, convenient for controlling content of iodine, meet the ion film caustic soda technology of threonates of the requirement of ionic membrane film caustic soda salt.

In order to solve the above-mentioned technical problem, present invention employs the following technical solutions:

Ion film caustic soda technology of threonates includes the steps that, using five effect vacuum vaporation system salt manufacturing, five effect is true Empty vapo(u)rization system includes five evaporators, and five evaporators are followed successively by I effect evaporation along the flow direction from front to back of heating steam Tank, II effect evaporator, III effect evaporator, IV effect evaporator and V imitate evaporator；It is characterized by also including content of iodine controls to walk Suddenly, the content of iodine rate-determining steps include choosing V effect evaporator to produce tank for ion film caustic soda salt, and V effect evaporator is direct The step of into former halogen；The content of iodine rate-determining steps further include the steps that the solid-to-liquid ratio controlled in V effect evaporator is 7-15%.

After ion film caustic soda technology of threonates of the invention, firstly, directly being fed from former halogen, eliminate repeatedly sharp The problem for causing content of iodine higher with mother liquor.

Secondly, control " it is 7-15% that V, which imitates the solid-to-liquid ratio in evaporator, ", so that mother liquor when V imitates evaporator salt discharge in salt slurry Content can reach 50-70%, so, i.e., enable i.e. salt discharge when salt discharge to arrange mother liquor again by solid-to-liquid ratio, to make The mother liquor content of iodine (or gypsum content) obtained in V effect evaporator will not be gathered or be increased, thus preferably by iodine in the salt of discharge Content mouth controls in the range of requiring.At the same time, choosing V effect evaporator is the benefit that ion film caustic soda salt produces tank, V Effect is the most end effect for absorbing steam heat, therefore the vapor in V effect evaporator volatilizees, efficiency (heating efficiency) is most slow, to be easy to Preferably control " it is 7-15% that V, which imitates the solid-to-liquid ratio in evaporator, ", so that the technique requires to be easier to realize.

In addition, ion film caustic soda technology of threonates of the invention realizes food using single five effects vacuum vaporation system The preparation of salt and ion film caustic soda technology of threonates realizes the diversity of manufacture product, and equipment and thermal energy is substantially improved Utilization efficiency reduces the investment of salt producing craft, so that production technology has higher return benefit.

Preferably, the content of iodine rate-determining steps further include the steps that obtaining a mixed halogen pump, the use of the mixed halogen pump Mother liquor in extraction V effect evaporator.

In ion film caustic soda technology of threonates, extracted in V effect evaporator using above-mentioned acquisition one mixed halogen pump The step of mother liquor, it can be avoided the accumulation and concentration of the mother liquor in V effect evaporator, to be better protected from through V effect evaporator row Content of iodine increases.

Preferably, ion film caustic soda technology of threonates further include V effectiveness blowdown pump, V effectiveness thickener and V effectiveness from Scheming；

The entrance of the V effectiveness blowdown pump is connected to by pipeline with the V delivery outlet sealing for imitating evaporation pot bottom, described The outlet of V effectiveness blowdown pump is connected to the sealing of the feed inlet of the V effectiveness thickener, the feed inlet of the V effectiveness centrifuge and The discharge port of the V effectiveness thickening motor spindle seals connection.

The use of above-mentioned V effectiveness blowdown pump, V effectiveness thickener and V effectiveness centrifuge effectively can imitate evaporator to V Salt discharge carry out storage and concentration, and can effectively prevent V effect evaporator salt discharge and other I to IV imitate evaporator salt discharge Mixing, more reliably maintain by V imitate evaporator row content of iodine be lower than 1mg/kg requirement, it is ensured that be made product matter Amount.

Preferably, also fixed between the outlet and the feed inlet of the V effectiveness thickener of every V effectiveness blowdown pump It is connected with a V effectiveness cyclone, the inlet pipe of the V effectiveness cyclone is connected to the exit seal of the V effectiveness blowdown pump, It seals and is connected between the sediment delivery outlet of the bottom of the V effectiveness cyclone and the feed inlet of the V effectiveness thickener, it is described The overflow pipe of V effectiveness cyclone is connected to V effect evaporator sealing.

The setting of above-mentioned V effectiveness cyclone, can to V imitate evaporator salt discharge (salt slurry) be separated by solid-liquid separation, improve into Enter the concentration and purity of salt slurry in V effectiveness thickener.At the same time, the setting of above-mentioned V effectiveness cyclone enables to imitate by V It can be conveyed to V effect evaporator with the mother liquor of cyclone isolated, preferably had more in maintenance (control) V effect evaporator Stable solid-to-liquid ratio, conducive to the lasting balance of production technology, it is ensured that production can be persistently reliable.

Preferably, integrally cylindrical structure, the shape of lower section are integrally in the shape of the upper section of the V effectiveness thickener Up big and down small cone cylindrical structure；The feed inlet of the V effectiveness thickener is located at the upper section of the V effectiveness thickener, the V effect There is overflow port with the upper section top of thickener；

Sealing is fixedly installed with for the elutriation washed by water inside V effectiveness thickener on the outer wall of the V effectiveness thickener Jet water spout, the installation site for eluriating jet water spout on the outer wall of V effectiveness thickener are the upper of the neighbouring cone cylindrical structure The position of feed inlet at end and lower than the V effectiveness thickener.

After being provided with the V effectiveness thickener of above-mentioned elutriation jet water spout, the feed inlet through V effectiveness thickener enters V effect It is in decanting zone (middle section of V effectiveness thickener short transverse) with the salt slurry inside thickener, then, salt slurry is made in self gravity It can be rinsed by elutriation jet water spout during falling to the lower section (compressional zone) of V effectiveness thickener under and make to wrap up in salt slurry Iodine from separated in salt slurry and can voluntarily float up to from liquid level through overflow port overflow (iodine can be floated to liquid level), thus into One step helps to improve the quality of final products.

Preferably, the elutriation jet water spout is that uniform intervals are arranged in the circumferential direction of the side wall of the V effectiveness thickener At least two, and the water spraying direction for eluriating jet water spout and the side wall of the V effectiveness thickener is round tangent.

Above-mentioned multiple jet water spouts of eluriating can enhance to the flushing effect into the salt slurry in V effectiveness thickener, preferably Reduce the content of iodine in salt discharge.

Preferably, ion film caustic soda technology of threonates further includes brine treatment step, the brine treatment step packet The step of including the step of storing brine and adding alkali into brine；Wherein, the step of storage brine is to be deposited using storage halogen tank Stored bitter；It is characterized by: added alkali is lye in described the step of adding alkali into brine, and the lye is deposited using lye Storage tank stores, and the lye storage tank is connected to by lye delivery pipe with the storage halogen tank, and close in the lye delivery pipe Envelope is fixedly installed with metering pump.

When in brine treatment step using above-mentioned " lye storage tank ", " lye delivery pipe " and " metering pump " come to storage halogen tank Middle addition lye also directly forms brine using storage halogen tank while can constituting brine storage equipment using storage halogen tank With the mixing vessel (" reactor tank ") of alkali, to reduce the quantity of equipment, so that brine treatment step is more simple.

In addition, in above-mentioned brine treatment step also using above-mentioned " lye storage tank ", " lye delivery pipe " and " metering pump " The additive amount of alkali is precisely controlled convenient for nearest or long-range control " metering pump ", so that the processing of brine is simpler efficient same When；Also it can be precisely controlled the ratio of brine and alkali, and then optimally brine is handled, reduce calcium ion, magnesium in brine The content of ion, sulfate ion, silica and suspended matter promotes the clarity of storage halogen tank middle and upper part clarification brine.

Preferably, the top generally openning shape of the storage halogen tank.

After structure using above-mentioned storage halogen tank, the complexity of storage halogen jar structure can reduce, reduce the cost of storage halogen tank.With This after the structure using above-mentioned storage halogen tank, is also convenient for aloft rapidly to the inside (clarity of brine) of storage halogen tank simultaneously It is observed, the sludge for being especially conducive to be quickly observed the bottom of storage halogen tank extracts situation.

Preferably, brine treatment step further includes blowdown step, the blowdown step includes the fixed peace on storage halogen tank Dirt sucking tube is filled, one end of the dirt sucking tube is connected to the outer wall sealing of the interior bottom of the storage halogen tank, the fixed peace of other end sealing Equipped with control valve.

It, can be after opening control valve, using the gravity of brine in storage halogen tank come so that storage halogen after above-mentioned dirt sucking tube is set The sludge of pot bottom is directly excluded through dirt sucking tube, while saving electric energy, also can preferably help to maintain the clear of good storage halogen tank Cleanliness and clarity.

Preferably, the dirt sucking tube also has the soil pick-up leading portion positioned at the interior bottom of the storage halogen tank, and before the soil pick-up The soil pick-up mouth down of section.

Above-mentioned soil pick-up leading portion and be arranged, can accurately control the sewage discharge tube of dirt sucking tube at the interior bottom position of storage halogen tank It sets, so that accurately the soil pick-up range of sewage discharge tube is positioned and be controlled.

Detailed description of the invention

Fig. 1 is the structure of equipment used by the brine treatment step in ion film caustic soda technology of threonates of the invention Schematic diagram.

Fig. 2 is the storage in equipment used by the brine treatment step in ion film caustic soda technology of threonates of the invention The structural schematic diagram of the interior bottom of halogen tank.

Fig. 3 is the structural schematic diagram of five effect vacuum vaporation systems in ion film caustic soda technology of threonates of the invention.

In the figure, it is marked as

1 storage halogen tank；

2 lye storage tanks；

3 lye delivery pipes；

4 metering pumps；

5 dirt sucking tubes: 51 soil pick-up leading portions；；

6 control valves；

7 connecting branches；

8 delivery trunks.

2001-I imitates evaporator, and 2002-II imitates evaporator, and 2003-III imitates evaporator, and 2004-IV imitates evaporator, 2005- V imitates evaporator；

201 water supplying pipes；

202 blowdown pumps；

203 first thickeners: 2031 eluriate jet water spout；

204 centrifuges；

205 cyclones.

300 mixed halogen pumps；

301-V effectiveness blowdown pump；

302-V effectiveness thickener: 3021 eluriate jet water spout；

303-V effectiveness centrifuge.

Specific embodiment

The present invention is described in further detail with reference to the accompanying drawing.Wherein, such as upper and lower, left for description use, The exemplary terms such as right, it is therefore intended that help reader to understand, limited without being intended for.

When specific implementation: as shown in Figure 1 to Figure 3, ion film caustic soda technology of threonates, including be evaporated in vacuo using five effects The step of system salt manufacturing, the five effects vacuum vaporation system include five evaporators, and five evaporators along heating steam from Flow direction after going to is followed successively by I effect evaporator 2001, II effect evaporator 2002, III effect evaporator 2003, IV effect evaporator 2004 A brine input pipe is provided with and communicated with on V effect every evaporator of evaporator 2005()；It further include content of iodine rate-determining steps, The content of iodine rate-determining steps include choosing V effect evaporator to produce tank for ion film caustic soda salt, and V effect evaporator is directly into original The step of halogen；The content of iodine rate-determining steps further include the steps that the solid-to-liquid ratio controlled in V effect evaporator is 7-15%.

When implementation, V imitate evaporator directly into former halogen the step of, imitate evaporator directly into the brine stored in storage halogen tank for V (former halogen).

When implementation, the method for measurement " V imitates the solid-to-liquid ratio in evaporator " is the prior art, for example, technical literature " is brief talked true The method of empty salt manufacturing evaporator level gauging " (Wang Tianhe, " salt industry and chemical industry ", in the April, 2015 of page 52 to 54) and " tuning fork vibration Application of the dynamic density meter in solid-to-liquid ratio measurement " (Wang Liang, Zhu Le, " salt industry and chemical industry ", page 40 to 44 of in September, 2012).Control Solid-to-liquid ratio in V effect evaporator processed is also existing technological means, for example, the heating time of control V effect evaporator, or control V imitates the water supply etc. of the water supplying pipe of evaporator.

The existing technique using five effect vacuum vaporation system salt manufacturing, because containing iodine in brine, and without going out in production technology Iodine technique, each mother liquor imitated in evaporator production process to reuse (" mother liquor " be isolated in crystallization process precipitating or Remaining saturated solution after crystal) and be gradually concentrated, so that the content of iodine in liquid in pipe is increased to 10-20mg/L, Wu Faman The requirement (iodine≤1mg/kg) of sufficient ionic membrane film caustic soda salt.

After above-mentioned ion film caustic soda technology of threonates, firstly, directly feeding from former halogen, mother is recycled in elimination The problem that liquid causes content of iodine higher.

Secondly, control " it is 7-15% that V, which imitates the solid-to-liquid ratio in evaporator, ", so that mother liquor when V imitates evaporator salt discharge in salt slurry Content can reach 50-70%, so, i.e., enable i.e. salt discharge when salt discharge to arrange mother liquor again by solid-to-liquid ratio, to make The mother liquor content of iodine (or gypsum content) obtained in V effect evaporator will not be gathered or be increased, thus preferably by iodine in the salt of discharge Content mouth controls in the range of requiring.At the same time, choosing V effect evaporator is the benefit that ion film caustic soda salt produces tank, V Effect is the most end effect for absorbing steam heat, therefore the vapor in V effect evaporator volatilizees, efficiency (heating efficiency) is most slow, to be easy to Preferably control " it is 7-15% that V, which imitates the solid-to-liquid ratio in evaporator, ", so that the technique requires to be easier to realize.

In addition, above-mentioned ion film caustic soda technology of threonates using it is single five effect vacuum vaporation system i.e. realize salt and The preparation of ion film caustic soda technology of threonates realizes the diversity of manufacture product, the utilization of equipment and thermal energy is substantially improved Efficiency reduces the investment of salt producing craft, so that production technology has higher return benefit.

Wherein, the content of iodine rate-determining steps further include the steps that obtaining a mixed halogen pump 300, the mixed halogen pump 300 For extracting the mother liquor in V effect evaporator.

When implementation, the mixed halogen pump 300 is mixed-flow pump, and mixed-flow pump is that therefore not to repeat here for the prior art.

When implementation, the mother liquor for being used to extract in V effect evaporator of the mixed halogen pump 300, i.e., the inlet tube mouth of mixed halogen pump 300 It is connected to bottom in V effect evaporator.The mother liquor that halogen pump 300 is extracted by V effect evaporator is mixed by this and imitates evaporation to I effect evaporator, II Tank, III effect evaporator charging.

In ion film caustic soda technology of threonates, extracted in V effect evaporator using above-mentioned acquisition one mixed halogen pump 300 Mother liquor the step of, can be avoided V effect evaporator in mother liquor accumulation and concentration, imitate evaporator through V to be better protected from Content of iodine is arranged to increase.

Wherein, ion film caustic soda technology of threonates, it is characterised in that: further include V effectiveness blowdown pump 301, the thickening of V effectiveness Machine 302 and V effectiveness centrifuge 303；

The entrance of the V effectiveness blowdown pump 301 is connected to by pipeline with the V delivery outlet sealing for imitating evaporation pot bottom, The outlet of the V effectiveness blowdown pump 301 is connected to the sealing of the feed inlet of the V effectiveness thickener 302, the V effectiveness centrifuge 303 feed inlet is connected to the sealing of the discharge port of 302 bottom of V effectiveness thickener.

When implementation, V effectiveness blowdown pump 301 is blowdown pump, V effectiveness thickener 302 as thickener, V effectiveness centrifuge 303 be centrifuge；And blowdown pump (for details, reference can be made to the technical solutions that: notification number is CN202391749U), thickening implement body Can be found in: notification number is the technical solution of CN201257317Y or CN204502478U) and centrifuge (for details, reference can be made to: bulletin Number be CN206139350U technical solution) be existing equipment, therefore not to repeat here.

The use of above-mentioned V effectiveness blowdown pump 301, V effectiveness thickener 302 and V effectiveness centrifuge 303, can be effectively to V The salt discharge of effect evaporator carries out storage and concentration, and the salt discharge of V effect evaporator and other I to IV effect can be effectively prevent to steam The mixing for sending out tank salt discharge more reliably maintains to imitate the requirement that evaporator row's content of iodine is lower than 1mg/kg by V, it is ensured that be made The quality of product.

Wherein, also fixed between the outlet and the feed inlet of the V effectiveness thickener of every V effectiveness blowdown pump 301 It is connected with a V effectiveness cyclone, the exit seal company of the inlet pipe of the V effectiveness cyclone and the V effectiveness blowdown pump 301 It is logical, it seals and is connected between the sediment delivery outlet of the bottom of the V effectiveness cyclone and the feed inlet of the V effectiveness thickener, The overflow pipe of the V effectiveness cyclone is connected to V effect evaporator sealing.

When implementation, V effectiveness cyclone is that existing equipment (specifically can be referring to: the technical side that notification number is CN205217162U Case), therefore not to repeat here.

The setting of above-mentioned V effectiveness cyclone, can to V imitate evaporator salt discharge (salt slurry) be separated by solid-liquid separation, improve into Enter the concentration and purity of salt slurry in V effectiveness thickener.At the same time, the setting of above-mentioned V effectiveness cyclone enables to imitate by V It can be conveyed to V effect evaporator with the mother liquor of cyclone isolated, preferably had more in maintenance (control) V effect evaporator Stable solid-to-liquid ratio, conducive to the lasting balance of production technology, it is ensured that production can be persistently reliable.

Wherein, the shape of the upper section of the V effectiveness thickener integrally integrally present greatly by cylindrical structure, the shape of lower section Under small cone cylindrical structure；The feed inlet of the V effectiveness thickener is located at the upper section of the V effectiveness thickener, and the V effectiveness increases There is overflow port at the top of the upper section of thick device；

Sealing is fixedly installed with for the elutriation washed by water inside V effectiveness thickener on the outer wall of the V effectiveness thickener Jet water spout 3021, the installation site for eluriating jet water spout 3021 on the outer wall of V effectiveness thickener are the neighbouring cone cylinder type The position of feed inlet at the upper end of structure and lower than the V effectiveness thickener.

After being provided with the V effectiveness thickener of above-mentioned elutriation jet water spout 3021, the feed inlet through V effectiveness thickener enters Salt slurry inside V effectiveness thickener is in decanting zone (middle section of V effectiveness thickener short transverse), and then, salt slurry is in itself weight It can be rinsed by elutriation jet water spout 3021 during falling to the lower section (compressional zone) of V effectiveness thickener under power effect and make salt The iodine wrapped up in slurry from separated in salt slurry and can voluntarily float up to from liquid level through overflow port overflow (iodine can be floated to liquid Face), so that further help improves the quality of final products.

Wherein, the elutriation jet water spout 3021 is that uniform intervals are arranged in the circumferential direction of the side wall of the V effectiveness thickener At least two, and the water spraying direction for eluriating jet water spout 3021 and the side wall of the V effectiveness thickener is round tangent.

When implementation, preferably multiple bath directions for eluriating jet water spout 3021 are same hour hands direction of rotation.And using " institute It states the round tangent of the side wall of the water spraying direction and the V effectiveness thickener of eluriating jet water spout 3021 and is in same hour hands and rotate Direction " after structure, the water sprayed through all elutriation jet water spouts 3021 are capable of forming an eddy-currents, and eddy-currents can make salt slurry Equal substance does not scatter middle density, to obtain better flushing effect.

Above-mentioned multiple jet water spouts 3021 of eluriating can enhance to the flushing effect into the salt slurry in V effectiveness thickener, more The content of iodine in salt discharge is reduced well.

Wherein, ion film caustic soda technology of threonates further includes brine treatment step, and the brine treatment step includes storage The step of depositing brine and into brine plus the step of alkali；Wherein, the step of storage brine is to store halogen using storage halogen tank 1 Water；Added alkali is lye in described the step of adding alkali into brine, and the lye is stored using lye storage tank 2, institute It states lye storage tank 2 to be connected to by lye delivery pipe 3 with the storage halogen tank 1, and seals and be fixedly mounted in the lye delivery pipe 3 There is metering pump 4.

When implementation, the diaphragm metering pump 4 of the metering pump 4 preferably band " non-return valve " function.In this way, metering pump 4 only can Unidirectional water storage, it is ensured that the reliability of lye is added into brine.

When in brine treatment step using above-mentioned " lye storage tank 2 ", " lye delivery pipe 3 " and " metering pump 4 " come to storage Lye is added in halogen tank 1, i.e., while can constituting brine storage equipment using storage halogen tank 1, also using storage halogen tank 1 come direct shape At the mixing vessel (" reactor tank ") of brine and alkali, to reduce the quantity of equipment, so that brine treatment step is more simple.

In addition, using above-mentioned " lye storage tank 2 ", " lye delivery pipe 3 " and " metering pump 4 " in above-mentioned brine treatment step Nearest or long-range control " metering pump 4 " is also convenient for be precisely controlled the additive amount of alkali, so that the processing of brine is simpler efficiently While；Also the ratio of brine and alkali can be precisely controlled, and then optimally brine is handled, reduce brine in calcium from The content of son, magnesium ion, sulfate ion, silica and suspended matter promotes the clarification of storage 1 middle and upper part of halogen tank clarification brine Degree.

Wherein, the top generally openning shape of the storage halogen tank 1.

After structure using above-mentioned storage halogen tank 1, the complexity of storage 1 structure of halogen tank can reduce, reduce making for storage halogen tank 1 Valence.At the same time, after using the structure of above-mentioned storage halogen tank 1, be also convenient for aloft rapidly to storage halogen tank 1 inside (brine Clarity) it is observed, the sludge for being especially conducive to be quickly observed the bottom of storage halogen tank 1 extracts situation.

Wherein, brine treatment step, it is characterised in that: further include blowdown step, the blowdown step is included in storage halogen tank 1 Upper fixed installation dirt sucking tube 5, one end of the dirt sucking tube 5 are connected to the outer wall sealing of the interior bottom of the storage halogen tank 1, the other end Sealing is fixedly installed with control valve 6.

It, can be after opening control valve 6, using the gravity of brine in storage halogen tank 1 come so that storage after above-mentioned dirt sucking tube 5 is set The sludge of 1 bottom of halogen tank is directly excluded through dirt sucking tube 5, while saving electric energy, also can preferably help to maintain good storage halogen tank 1 Cleannes and clarity.

Wherein, the dirt sucking tube 5 also has the soil pick-up leading portion 51 for the interior bottom for being located at the storage halogen tank 1, and before the soil pick-up The soil pick-up mouth down of section 51.

Above-mentioned soil pick-up leading portion 51 and be arranged, can accurately control the sewage discharge tube of dirt sucking tube 5 in the interior bottom of storage halogen tank 1 Position, so that accurately the soil pick-up range of sewage discharge tube is positioned and be controlled.

Wherein, the dirt sucking tube 5 is horizontally spaced more, and the sewage discharge tube of more dirt sucking tubes 5 is in institute It states and is evenly spaced in the interior bottom of storage halogen tank 1.

Above structure enables the sewage discharge tube of more dirt sucking tubes 5 to be evenly spaced in the interior bottom of storage halogen tank 1, so that The soil pick-up range of the sewage discharge tube of more dirt sucking tubes 5 can substantially more cover the interior bottom of storage halogen tank 1, so as to be filled Divide and efficiently filth-discharging effect.

Wherein, the more dirt sucking tubes 5 are located at the circumferential same side of the storage halogen tank 1, and every dirt sucking tube 5 is connected The delivery outlet of the control valve 6 connect passes through a connecting branch 7 respectively and is connected to the sealing of same root delivery trunk 8.

After adopting the above structure, so that installation site of the more dirt sucking tubes 5 on storage halogen tank 1 is more concentrated, but also more The assembling up on storage halogen tank 1 of root dirt sucking tube 5 can be more quick.

In addition, after adopting the above structure, also making the arrangement of more dirt sucking tubes 5 more regular, to facilitate using above-mentioned " delivery trunk 8 " come collect and efficiently remotely output sludge.

Wherein, the soil pick-up leading portion 51 of adjacent two dirt sucking tubes 5 is the straight pipeline section for two straights that one is long and the other is short.

After adopting the above structure, not only have the advantages that structure is most simple, consequently facilitating implementing.It can also ensure more suctions While the soil pick-up range of the sewage discharge tube of dirty pipe 5 is adequately coated the interior bottom of storage halogen tank 1；It is also possible that each dirt sucking tube 5 Soil pick-up leading portion 51 length it is most short and straight, to be conducive to the quick discharge of sludge, further help to improve the discharge of sludge Efficiency.

Wherein, be additionally provided with brine suction pipe (not shown) in the storage halogen tank 1, one end of the brine suction pipe be with The external deferent segment being connected to of the storage halogen tank 1, the other end are the suction casing inside the storage halogen tank 1.

The setting of above-mentioned brine suction pipe carrys out salt manufacturing convenient for the brine for storing up halogen tank 1 is delivered to evaporator outward.

Wherein, the suction casing generally hose, and it is fixedly connected with one piece of floating block at neighbouring port on the suction casing, The floating block is used to enable on the suction casing at the liquid level for swimming in the brine in the storage halogen tank 1 at neighbouring port.

When implementation, the port of the suction casing is fixedly connected with a density greater than brine and is used for the end so that suction casing The connector of mouth down.Block made from piece of stainless steel or aluminium alloy can be used in connector.

After adopting the above structure, enable to hose that can swim in the top of brine at the water surface, so, i.e., It can ensure that the port of suction casing can be located at for a long time in the clarification part of the brine in storage halogen tank 1, it is clear to draw more storage halogen tank 1 Clear brine is used for salt manufacturing, to better assure the quality of obtained salt.

In addition, alkali amine industrial salt production technology can also be implemented using five effect vacuum vaporation systems using above-mentioned, it is described Alkali amine industrial salt production technology includes the steps that removing impurity, and the step of removal impurity includes pH value detection and pH value tune Section, wherein pH value detection include sealed on every evaporator it is fixed for measuring evaporator internal liquid pH value PH sensor；

The pH value adjusting includes sealing to be fixedly mounted and for the water supply supplied water in evaporator on every evaporator Pipe 201 is fixedly installed with control valve on the water supplying pipe 201；The pH of each evaporation pot liquid after pH value adjusting Value is 7.5-8.5.

Well known to those skilled in the art when implementation, the delivery outlet of every evaporation pot bottom passes through pipeline and desalinization of soil by flooding or leaching device Feed pipe is connected to clean through salt particle.

When implementation, brine input pipe will store up the brine transportation in halogen tank into evaporator.

The working principle of above-mentioned alkali amine industrial salt production technology are as follows:

By " the pH value detection " in above-mentioned " the step of removal impurity " come every evaporator internal liquid pH of real-time detection Value, by above-mentioned " pH value adjustings " come in time by water supplying pipe 201 to inside every evaporator plus water controls so that every is steamed The pH value of hair pot liquid maintains 7.5-8.5.

So, after the pH value for evaporating pot liquid when every maintains 7.5-8.5, i.e., so that brine in evaporator PH value reduce (brine from storage brine storage halogen tank in conveying come, store up halogen tank in brine pH value be 9-9.5), so that every The pH value of crude salt (crystal being precipitated after the heating by brine) inside evaporator reduces, the magnesium after crude salt is dissolved in water, in crude salt Ion exists with ionic forms, and magnesium hydroxide suspended matter and precipitating would not be generated in this way inside evaporator, to be promoted each The light transmittance of salt discharge in a evaporator, final promoted wash salt discharge in each evaporator into desalinization of soil by flooding or leaching device, then through centrifuge 204 The light transmittance of the wet salt obtained after separation (wet salt light transmittance is promoted to 80% or more from 60% or less).

Wherein, the evaporator is five, so that the multiple-effect vacuum vapo(u)rization system imitates vacuum vaporation systems, and five for five Platform evaporator is followed successively by I effect evaporator, II effect evaporator, III effect evaporator, IV effect along the flow direction from front to back of heating steam Evaporator and V imitate evaporator.

Had using the five effect vacuum vaporation systems that five evaporators are constituted and makes full use of steam heat, comprehensive method of investment return The optimal benefit of benefit.

Wherein, alkali amine industrial salt production technology further includes the steps that the step of salt slurry is concentrated, and the salt slurry is concentrated includes The step of obtaining and be fixedly mounted blowdown pump 202, the first thickener 203 and centrifuge 204；The bottom of the III effect evaporator Delivery outlet and IV effect evaporator bottom delivery outlet respectively with the entrance of a blowdown pump 202 by seal for pipe joints company Logical, the outlet of the blowdown pump 202 is connected to the sealing of the feed inlet of first thickener 203, the centrifuge 204 into Material mouth is connected to the sealing of the discharge port of 203 bottom of the first thickener.

When implementation, blowdown pump 202, the first thickener 203 and centrifuge 204 are respectively that existing blowdown pump 202(specifically may be used Referring to: notification number is the technical solution of CN202391749U), thickener (for details, reference can be made to: notification number be CN201257317Y or The technical solution of CN204502478U) and centrifuge 204(for details, reference can be made to the technical sides that: notification number is CN206139350U Case), therefore not to repeat here.

Using above-mentioned salt slurry be concentrated the step of after, ensure obtain wet salt light transmittance it is up to standard while, promoted from from The content of sodium chloride is higher than 90.5% in the wet salt being discharged in scheming 204.

Moreover, it takes from III and imitates salt discharge salt discharge doing into the first thickener 203 in evaporator and IV effect evaporator The also obtainable benefit of method is: under the premise of ensuring product light transmittance and sodium chloride content, to the heat utilization of heating steam It is more scientific that rationally reason is that the caloric receptivity of III effect evaporator and IV effect evaporator is less than, I imitates evaporator and II imitates evaporator, The recept the caloric salt discharge of higher I effect evaporator and II effect evaporator is enabled to directly obtain more dry crude salt in this way, from And it is rapidly used for that salt is made；The recept the caloric salt discharge of lower III effect evaporator and IV effect evaporator is quickly made For the industrial wet salt of alkali amine.So, this production technology using it is single five effect vacuum vaporation system i.e. realize salt and The diversity of manufacture product is realized in the preparation of alkali amine industrial salt, and the utilization efficiency of equipment and thermal energy is substantially improved, and reduces salt manufacturing The investment of technique, so that production technology has higher return benefit.

Wherein, it the outlet of every blowdown pump 202 and is also fixedly connected between the feed inlet of first thickener 203 There is a cyclone 205, the inlet pipe of the cyclone 205 is connected to the exit seal of the blowdown pump 202, the cyclone It seals and is connected between the sediment delivery outlet of 205 bottom and the feed inlet of first thickener 203, the cyclone 205 Overflow pipe and the III effect evaporator sealing be connected to.

When implementation, cyclone 205 is that existing equipment (specifically can be referring to: the technical side that notification number is CN205217162U Case), therefore not to repeat here.

The setting of above-mentioned cyclone 205, the salt discharge (salt slurry) that evaporator and IV effect evaporator can be imitated to III carry out solid-liquid Separation improves the concentration and purity for entering salt slurry in the first thickener 203.At the same time, the setting of above-mentioned cyclone 205 can Enable and III effect evaporator is conveyed to by the mother liquor of cyclone 205 isolated, maintains in (control) III effect evaporator With relatively stable solid-to-liquid ratio, conducive to the lasting balance of production technology, it is ensured that production can be persistently reliable.

Wherein, the shape of the upper section of first thickener 203 integrally integrally present by cylindrical structure, the shape of lower section Small cone cylindrical structure under big；The feed inlet of first thickener 203 is located at the upper section of first thickener 203, described There is overflow port at the top of the upper section of first thickener 203；

Sealing is fixedly installed with for washing by water inside the first thickener 203 on the outer wall of first thickener 203 Jet water spout 2031 is eluriated, the installation site for eluriating jet water spout 2031 on the outer wall of the first thickener 203 is neighbouring described Bore the position of the feed inlet at the upper end of cylindrical structure and lower than first thickener 203.

After being provided with the first thickener 203 of above-mentioned elutriation jet water spout 2031, the feed inlet through the first thickener 203 Decanting zone (middle section of 203 short transverse of the first thickener), then, salt slurry are in into the salt slurry inside the first thickener 203 It can be rushed by elutriation jet water spout 2031 during falling to lower section (compressional zone) of the first thickener 203 under self gravitation effect It washes and makes the gypsum wrapped up in salt slurry and impurity from separating and can be voluntarily floated up to from liquid level through overflow port in salt slurry It overflows (gypsum and impurity in salt water can be floated to liquid level), to further help the quality for improving final products and be promoted wet The content of sodium chloride in product salt.

Wherein, the elutriation jet water spout 2031 is that uniform intervals are set in the circumferential direction of the side wall of first thickener 203 At least two set, and the round phase of the water spraying direction and the side wall of first thickener 203 for eluriating jet water spout 2031 It cuts.

When implementation, preferably multiple bath directions for eluriating jet water spout 2031 are same hour hands direction of rotation.And using " institute It states the round tangent of the side wall of the water spraying direction and first thickener 203 of eluriating jet water spout 2031 and is in same hour hands and turn After the structure of dynamic direction ", the water sprayed through all elutriation jet water spouts 2031 is capable of forming an eddy-currents, and eddy-currents can make salt Equal substance does not scatter density in slurry, to obtain better flushing effect.

Above-mentioned multiple jet water spouts 2031 of eluriating can enhance to the flushing effect into the salt slurry in the first thickener 203.

The above is only the preferred embodiment of the present invention, need to point out it is that this skill is not being departed from for those skilled in the art Under the premise of art scheme, several modifications and improvements can also be made, the technical solution of above-mentioned modification and improvement, which should equally be considered as, to be fallen Enter the claimed range of the claims.

Claims (7)

1. ion film caustic soda technology of threonates is included the steps that using five effect vacuum vaporation system salt manufacturing, the five effects vacuum Vapo(u)rization system includes five evaporators, and five evaporators along the flow direction from front to back of heating steam be followed successively by I effect evaporator, II imitates evaporator, III effect evaporator, IV effect evaporator and V and imitates evaporator；It is characterized by also including content of iodine rate-determining steps, The content of iodine rate-determining steps include choosing V effect evaporator to produce tank for ion film caustic soda salt, and V effect evaporator is directly into original The step of halogen；The content of iodine rate-determining steps further include the steps that the solid-to-liquid ratio controlled in V effect evaporator is 7-15%；

It further include V effectiveness blowdown pump, V effectiveness thickener and V effectiveness centrifuge；

The entrance of the V effectiveness blowdown pump is connected to by pipeline with the V delivery outlet sealing for imitating evaporation pot bottom, the V effect It is connected to the outlet of blowdown pump with the sealing of the feed inlet of the V effectiveness thickener, the feed inlet of the V effectiveness centrifuge and institute State the discharge port sealing connection of V effectiveness thickener bottom；

Integrally cylindrical structure, the shape of lower section are integrally in up big and down small cone to the shape of the upper section of the V effectiveness thickener Cylindrical structure；The feed inlet of the V effectiveness thickener is located at the upper section of the V effectiveness thickener, the V effectiveness thickener it is upper Section top has overflow port；

Sealing is fixedly installed with for the elutriation bath washed by water inside V effectiveness thickener on the outer wall of the V effectiveness thickener Pipe, the jet water spout of eluriating is at the upper end that the installation site on the outer wall of V effectiveness thickener is the neighbouring cone cylindrical structure And the position of the feed inlet lower than the V effectiveness thickener；

The jet water spout of eluriating is uniform intervals are arranged in the circumferential direction of the side wall of the V effectiveness thickener at least two, and The circle of the water spraying direction for eluriating jet water spout and the side wall of the V effectiveness thickener is tangent；And each elutriation jet water spout Bath direction is same hour hands direction of rotation.

2. ion film caustic soda technology of threonates according to claim 1, it is characterised in that: the content of iodine rate-determining steps Further include the steps that obtaining a mixed halogen pump, the mother liquor for being used to extract in V effect evaporator of the mixed halogen pump.

3. ion film caustic soda technology of threonates according to claim 1, it is characterised in that: every V effectiveness salt discharge A V effectiveness cyclone, the V effectiveness rotation are also fixedly connected between the outlet of pump and the feed inlet of the V effectiveness thickener The inlet pipe of stream device is connected to the exit seal of the V effectiveness blowdown pump, the sediment output of the bottom of the V effectiveness cyclone Mouthful be connected to seal between the feed inlet of the V effectiveness thickener, the overflow pipe and the V of the V effectiveness cyclone imitate steaming Send out tank sealing connection.

4. ion film caustic soda technology of threonates according to claim 1, it is characterised in that: further include brine treatment step Suddenly, the brine treatment step includes the steps that the step of storing brine and adding alkali into brine；Wherein, the storage brine Step is to store brine using storage halogen tank；It is described into brine plus the step of alkali in added alkali be lye, and the lye It is stored using lye storage tank, the lye storage tank is connected to by lye delivery pipe with the storage halogen tank, and the lye Sealing is fixedly installed with metering pump in delivery pipe.

5. ion film caustic soda technology of threonates according to claim 4, it is characterised in that: the top of the storage halogen tank is whole Body is openning shape.

6. ion film caustic soda technology of threonates according to claim 4, it is characterised in that: it further include blowdown step, institute Stating blowdown step includes that dirt sucking tube is fixedly mounted on storage halogen tank, the interior bottom of one end of the dirt sucking tube and the storage halogen tank Outer wall sealing connection, other end sealing are fixedly installed with control valve.

7. ion film caustic soda technology of threonates according to claim 6, it is characterised in that: the dirt sucking tube also has position Soil pick-up leading portion in the interior bottom of the storage halogen tank, and the soil pick-up mouth down of the soil pick-up leading portion.