RU1438U1 - MULTI-STAGE DISTILLATION UNIT - Google Patents

Abstract

A MULTI-STAGE DISTILLATION PLANT for producing highly pure water, containing a film evaporator, a regenerative heater, a droplet eliminator, pipelines and pipes equipped with a condenser in each stage, moreover, the branch pipe for supplying desalinated water from the regenerative heater of the first stage is connected to the pipe for introducing desalinated water the steam of the stage is running, and the pipeline for introducing heating steam from an external source - with the pipe of the heating steam of the evaporator of the same stage, o characterized in that the condenser connected by the secondary steam pipeline to the last stage evaporator is equipped with a feed pipe for feeding natural water, the last stage evaporator is equipped with a concentrated natural water pipe outlet, the stage evaporator equipped with a regenerative heater equipped with a supply pipe for desalinated feed water from the last stage evaporator, equipped with an outlet pipe for concentrated demineralized water; an evaporator located after the stage in which the evaporator is equipped It is equipped with a outlet pipe for concentrated demineralized water, it is equipped with inlet pipes through a condenser and regenerative heaters for natural water and an outlet for highly pure water, secondary vapor nozzles for stage evaporators equipped with inlet water for demineralized desalinated water are connected to the upper nozzles of the remote demister, the lower nozzles of which are connected to the nozzles of introducing purified steam into the evaporator of the next step along the steam, evaporators equipped with nozzles for introducing nutritious natural water, o

Description

 P df-i / f V01D 1/26: C02f i / oa,

STAGER DISTRIBUTION INSTALLATION

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The utility model relates to evaporation technology, namely: to multi-stage thermal distillation desalination plants, and can be used for the production of highly pure water in pharmaceutical, biotechnology @ th, electronic, chemical and other industries.

The creation of multi-stage distillation plants for obtaining especially pure water is an urgent task, the importance of which is due to the fact that the domestic industry does not produce such plants. This is one of the reasons for the shortage of domestic drugs in the country. It is necessary to purchase installations for obtaining especially pure water abroad, which requires considerable foreign currency funds.

The situation is further aggravated by the fact that foreign plants require pre-demineralized water to be used as nutrient, which necessitates the additional construction of desalted plants, most often ion-exchange, which are highly undesirable from an environmental point of view. A distinctive feature of the proposed technical solution is the possibility of using natural water for supplying a multi-stage distillation unit without preliminary softening. With this, it is guaranteed to obtain especially pure, including biologically sterile (pyrogen-free) water.

Known multi-circuit installation of instant boiling, designed for the concentration of solutions (.a.c.OCGP No., I680246AI, V01D

Kommersant 1/26, 3/06, 1989), consisting of Maj5.vatel solution, device V Ch

circuits located along the evaporated solution and containing evaporation chambers connected in series along the evaporated solution, condensers and a circulation pump connected in series along the heated solution, the last condenser of the first recirculation circuit connected to the solution heater, and the last condensers of other circuits to perms evaporation chambers of these circuits, characterized in that the last condenser of each circulation circuit, starting from the second circuit, to olnitelno connected to the suction pipe of the circulation pump schyudyduschego circuit and device vshuska concentrated solution discharge pipe is connected to the circulation pump of the first circuit.

A disadvantage of the known installation is the impossibility of obtaining a high degree of purification of the secondary steam from droplets of the solution carried away by it, which is necessary to obtain especially pure water, for example, pyrogen-free, since the last condenser / of each circulation circuit, starting from the second, is additionally connected to the suction pipe of the circulation the pump of the preceding circuit, and the device for discharging the cobentiered solution is connected to the discharge pipe of the circulation pump of the primary circuit. The initial solution passes through all stages of the installation, and the resulting distillate is not subjected to repeated distillations. Under these conditions, only demineralized water can be obtained. To obtain particularly pure water, further processing of demineralized water is required in a special installation that meets the requirements for pyrogen-free installations. In addition, the known installation has low reliability due to the formation of scale on the heat exchanger tubes during evaporation and concentration of the initial solution, especially in high-temperature heating stages and heater. Another disadvantage is the high cost of electric energy for the pumps in the recirculation circuits. An evaporator unit is also known, pre /

Designated to produce demineralized water in thermal power plants (A.SS.SSSR No. I623675AI, Yu1D 1/26, 1989), containing a multi-stage flash boil-off evaporator with condensation lines and a distillate discharge pipe, a head heater, a source water supply pipe, a source of boiling steam and pumps connected to one of the condensation lines, characterized in that it is equipped with a heat exchanger with a heating steam supply pipe, and the heating steam source is made in the form of surface-connected evaporators type with a secondary steam pipeline and feed water supply pipelines, while the secondary steam pipeline of the surface-type evaporator last along the steam is connected to the head heater and to the heat exchanger heating steam supply piping, the feed water supply pipeline through the condensation line is connected to the feed supply pipelines surface type evaporators, and the distillate discharge pipe is connected to a heat exchanger.

The disadvantage of the evaporator installation, as well as the analogue according to A.SL68024bA1, is the impossibility of obtaining particularly pure water due to the fact that the source and concentrated water passes through all stages containing instant boilers and surface type, as the pipeline for supplying the source water through the condensation line It is connected to pipelines for supplying feed water to surface-type evaporators, and the distillate (demineralized water) requires additional processing to produce extra pure water.

Another disadvantage is the increased costs in the manufacture and operation of the installation. In addition, the analogue according to ASL62367541 has low reliability due to the formation of scale on heat transfer tubes, especially in high-temperature steps with surface-type evaporators. / The closest to the claimed is a multi-stage medical distillation unit Finn-Aqua, designed for

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production of sterile water without impurities of pyrogenic inclusions (SaniasciCO Co. advertising brochure containing in each С1; upside down a vertical evaporator with a falling liquid film, a regenerative heater, a centrifugal droplet eliminator built into the evaporator, pipelines and nozzles equipped with a condenser, and the input pipe to the plant water, corresponding to the requirements of pharmacopoeia Ш1А and Europe, is connected through a condenser and all regenerative heaters to the supply pipe of the nutrient desalted water to the evaporator of the first step along the steam. Evaporating and concentrating the desalted water due to the pressure difference to the finer steps passes through the heating pipes of the evaporators of all stages and is removed from the installation through the evaporator pipe of the last stage. The heating steam pipe from an external source is connected to the pipe of the evaporator annulus only the first stage.The remaining evaporators are heated by the secondary pairs of evaporators of the previous stages. In the annular channel between the heating chamber and the body of each evaporator, a built-in centrifugal droplet-collector is installed, and the secondary steam formed in the heating pipes passes through the droplet eliminator from below, and, being cleared of impurities and pyrogens, exits the annular channel through the upper branch pipe to the next evaporator. The distillate of purified steam is a finished product - sterile pyrogen-free, th; it passes due to the pressure difference through the evaporators and heaters of the second and subsequent stages and through the condenser is discharged at 97 ° C in the finished product storage. Condensate of heating steam through the nozzles of the evaporator and the first stage heater is returned to the boiler room. This installation is selected as a prototype.

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The disadvantage of the prototype is a mandatory requirement for the use of demineralized water as a nutrient. The plant’s natural water supply is unacceptable, since it will not allow to obtain biologically pure (pyrogen-free) water that meets the requirements of the pharmacopoeial article of Russia iC 42-2620-89 (or FS ХХП СМ and Europe - for FinnAqua plants), and to avoid scale, especially when heating water to 1 ° C. Another disadvantage is the use of centrifugal droplets built into the evaporator with an upward flow of cleaned secondary steam, which, ceteris paribus, leads to an increase in droplet eliminator diameter, a decrease in centrifugal forces and less efficient removal of meshes and pyrogens. / Thus, the prototype installation is characterized by such technical contradiction, as the connection of the input pipe to the installation of nutritious demineralized water through a condenser and all regenerative heaters with a pipe evaporates spruce the first stage with further passage through the evaporators of all stages. This contradiction is due to the fact that obtaining pyrogen-free water in this case is possible. Only under the condition that the quality of demineralized water meets the requirements of the pharmacopoeial article of Russia FS 42-2619-89, which is associated with the need to build a special installation for the production of nutritious demineralized water, which, in turn, is

with the need to increase production facilities and substantial capital, energy and operating costs.

The main objective of the utility model is the creation of a multi-stage distillation plant for the production of specific, including pyrogen-free water by heat treatment at a temperature of at least 160 C in one unit when feeding it with natural water, as well as improving the reliability of the installation with reduced energy and operating costs.

--.:- the separated steam at Ts1

An additional task is to increase the efficiency and reliability of droplet eliminators for cleaning the secondary vapor entering the evaporators, from which the pyrogen-free water is removed from the annulus.

The main task is achieved in that a multi-stage distillation unit containing a film evaporator in each stage, a regenerative heater, a droplet eliminator, pipelines and nozzles equipped with a condenser, and the demineralized water supply pipe from the regenerative heater of the first stage is connected to the pipe for introducing demineralized water into the first evaporator along the step pair, and the heating steam inlet pipe - with the heating steam pipe of the evaporator of the same stage, characterized in that the condenser connected by a secondary steam pipeline to the evaporator of the last stage, is equipped with a feed pipe for feeding natural water, the evaporator of the last stage is equipped with a pipe for withdrawing concentrated natural water, the evaporator of a stage equipped with a regenerative heater equipped with a pipe for introducing desalted water from the evaporator of the last stage, is equipped with a pipe for withdrawing skimmed demineralized water , the evaporator located after the stage in which the evaporator is equipped with an outlet pipe concentrated both saline water, is equipped with inlet pipes through the condenser and regenerative heaters of the feed of natural water and the output of highly pure water, a patch pipe of the second pair of stage evaporators equipped with pipes for the supply of feed demineralized water, are connected to the upper pipes of the remote droplet eliminators, the lower pipes of which are connected to the pipes for the introduction of purified steam the evaporator of the following PF: an ode to a pair of steps, evaporators equipped with inlets for feeding a nutritious natural lead are equipped with built-in droplet eliminators.

3 X nasal and represent a cylindrical body with a swirl inserted into it in the form of a screw, and the entrance to the steam cleaner kaleulyuvitel made through the pipe located above the swirl, and the output through the pipe located under the swirl. This technical solution allows to significantly reduce the diameter of the droplet eliminator, to increase centrifugal forces and to carry out the downward movement of the steam being cleaned in the prototype. As a result, ceteris paribus, more efficient removal of droplets and inclusions from the vapor (including pyrogens) is carried out, the degree of steam purification is increased, and the quality of the product is improved; especially pure or biologically pure water. Comparison of the claimed technical solution not only with the prototype, but also with other technical solutions in this technical field did not allow to sew the indicated set of features in them. Thus, the claimed technical solution is not known from the prior art and meets the criteria of a novelty utility model. The specified set of features is a set of creatures. venous signs, since it is sufficient to achieve the technical result provided by the utility model, which is expressed in; the possibility of obtaining at one multistage distillation unit particularly clean or biologically pure water that meets the requirements of the pharmacopoeial article of Russia FS-42-2620-89, when used as nutritious natural water supplied directly to a distillation unit (which is achieved by supplying a condenser with an inlet of feed natural water and the connection of the outlet pipe for demineralized water from the last stage evaporator to the pipe for its input into the first stage evaporator) J - no need this additional unit for preparation from natural - demineralized water that meets the requirements of the pharmacopeia article of Russia FS 42-2619-89 (which increases the reliability of the declared distillation plant, facilitates maintenance and reduces capital, operating and energy costs); X os

-increasing the efficiency of centrifugal droplet eliminators with a downward flow of cleaned steam (which improves the degree of purification of steam and product quality);

-application in evaporators equipped with natural water inlet nozzles, built-in louvered drop eliminators (which reduces hydraulic resistance and loss of useful temperature difference).

A comparative analysis with the prototype shows that the claimed installation is characterized by the presence of signs that are distinct from the prototype and sufficient in all cases to which the requested amount of legal protection applies, namely, that:

 - a condenser connected by a secondary steam pipeline to an evaporator of an increasingly commonplace is equipped with a feed pipe for feeding natural water;

- the last stage evaporator is equipped with a outlet pipe and concentrated natural water;

- the evaporator of a stage equipped with a regenerative heater, equipped with a nozzle for introducing nutritious demineralized water from the last stage evaporator, is equipped with a nozzle for withdrawing concentrated demineralized water;

- the evaporator, located after the stage in which the evaporator is equipped with a branch pipe for the output of concentrated demineralized water, is equipped with pipes for the input through the condenser and regenerative preheating of feed natural water and the output of highly pure water;

- pipes of the secondary steam of evaporators of the stage equipped with nozzles of input of the nutritious desalted lead, are connected to the upper nozzles of the remote drip eliminators, the lower nozzles of which are connected to the nozzles of the introduction of purified steam into the evaporator of the next stage along the steam;

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the mutual influence on the achievement of the above technical result of the utility model, allows, with a short work efficiency, to achieve a high degree of purification of the nutrient form, which provides highly pure water, increase reliability and efficiency, and also solves the technical contradiction of the known technical solutions, which consists in the use of natural feed water according to the connection scheme of the apparatus of the prototype installation, i.e., when the pipeline for the input of feed natural water through a condenser and regenerative heaters are connected to the nozzle for introducing it into the first pf: ode to vapor is an evaporator with further concentration in all subsequent evaporators; it is impossible to provide the degree of purification of secondary steam necessary for obtaining pyrogen-free water and to avoid scale on heat-exchange surfaces. This contradiction is resolved by supplying a condenser with an inlet of feed of natural water and a connection of a pipeline of feed with demineralized water obtained from natural water in the inventive installation itself, with its inlet to the first stage evaporator.

Causal relationships between the set of essential features of the claimed utility model and the achieved technical result are as follows:

- Supply of a condenser with a feed pipe for feeding natural water, an evaporator of the last stage - a pipe for outputting concentrated .. natural Veda and equipping evaporators equipped with feed pipes for feeding natural water with integrated droplet eliminators ensure its distillation with cleaning of the secondary steam by 10 times, which is enough to get in the installation of nutritious demineralized water, suitable for obtaining from it distillation of highly pure water;

-supply of a stage evaporator equipped with a regenerative heater, equipped with a branch pipe for supplying desalinated nutrient water from the last stage evaporator, with a concentrated branch pipe

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demineralized water, equipping the evaporator located after the stage in which the evaporator is equipped with a nozzle for concentrating concentrated demineralized water, water nozzles through a condenser and regenerative heaters with the nourishing nature of water and the outlet of especially heavy water, as well as connecting secondary steam nozzles for the stage evaporators equipped with nutrient demineralized inlet nozzles water, with the upper nozzles of the remote droplet eliminators, the lower nozzles of which are connected to the nozzles for introducing purified steam into the evaporator rail car during the stage, thus allowing downward movement when brushing steam raising purity vapor further 10 times, and obtain highly pure water by its condensation. The figure shows the proposed installation. Depicted are six steps, but their number may be more. A stage is understood as a combination of devices: an evaporator, a regenerative heater, a droplet eliminator, pipelines and :, nozzles.

A multi-stage distillation installation contains film evaporators of 1-3 natural water, film evaporators of 4-6 desalinated water, regenerative heaters of 7-9 natural water, regenerative heaters of 10-12 demineralized water, a condenser 13, remote droplets 14, built-in droplets 15, feed pipelines natural water 16, concentrated natural water 17, nutritious demineralized water 18, concentrated demineralized water 19, highly pure water 20, heating steam 21 from an external source, condensate heating RA 22, secondary steam 23, nozzles for introducing feedwater 24 into the condenser 13, introducing feedwater 25 into evaporator I, feedwater 26 into evaporators 2 and 3, withdrawing concentrated natural water 27, supplying demineralized water 28 to regenerative heater 10, output of demineralized feed water 29 from the regenerative heater 12, input of demineralized demineralized water ZS to the evaporator 4, output of concentrated demineralized water 31, output of highly pure water 32, input of boiled steam 33 to the evaporator 4, input secondary steam 34 in evaporators 5,6,1

1 ,

secondary steam 35 from the evaporators 4-6, input of the secondary steam 36 into the remote drop catchers 14, the output of the purified steam 37.

Installation works as follows. The heating steam pipe 21 from an external source is connected to the pipe 33 of the annulus of the evaporator 4 only of the first stage. The remaining evaporators 5,6,1-3 are heated by the secondary steam of the previous evaporators. The steam condensate is returned via line 22 to an external source.

The condenser 13 is equipped with a feed pipe 24 for feeding natural water, which is fed through the heat exchange pipes of the condenser 13 and regenerative heaters 7-9 to the evaporator I, located after

the stage in which the evaporator 6 is equipped with a pipe 31 output concentrated demineralized water. Evaporating and concentrating the natural water supply due to the pressure differential between the stages from evaporator I passes through the heating pipes of the following evaporators 2 and 3. The last stage evaporator 3 is equipped with a nozzle 27 for the outlet of concentrated natural water from the installation. Secondary steam formed from natural water in evaporators 1–3 is cleaned of droplets and inclusions in the built-in, for example, louvre, droplet eliminators 15 and condenses in the annular space of evaporators 2,3 (starting from evaporator 2 located after evaporator I, equipped with a feed inlet 25 natural water), heaters 7–9 and condenser 13. The distillate of this steam is demineralized water suitable for obtaining pure water from non-pure water. Thus obtained in evaporators 2,3, regenerative heaters 7–9, and condenser 13, anesthetized nourishing water is supplied from the evaporator 3, heaters 7–9, and condenser 13 through the heat exchange tubes of the heaters 10–12 to the pipe 30 of the evaporator 4 of the first stage and under the pressure drop between the steps passes through the heat transfer tubes of evaporators 4-6. Concentrated in the required number of times demineralized water is discharged from the 6th stage evaporator equipped with a heater. equipped with a pipe 28 input nutrient demineralized water. The secondary steam formed during the evaporation of demineralized water in evaporators 4-6 passes through external centrifugal callovoliteli 14, and the secondary steam enters them through the upper nozzles 36, and leaves through the lower nozzles 37, which provides, firstly, the possibility of reducing the diameter of the droplet eliminator (in comparison with the built-in droplet eliminator according to the prototype) and, secondly, the downward movement of the cleaned secondary steam. Such technical solutions make it possible to increase, ceteris paribus, centrifugal forces, improve the conditions for separating drops and inclusions, and increase the efficiency of drop eliminators. The purified steam condenses in the annulus of the 5.6.1 second and subsequent Heti evaporators at temperatures of 160-100 ° C.

The distillate of this steam is a finished product: extra pure, pyrogen-free water (corresponding to the requirements of the Russian Pharmacopoeia article FS 42-2620-89) and is discharged from the evaporator I, located after the stage in which the evaporator 6 is equipped with a branch pipe 31 of the concentrated demineralized water supply, and regenerative heater 10.

For the first time in Russia, a multi-stage distillation unit is proposed, which allows to obtain especially pure, including pyrogen-free water, directly from natural water.

The claimed utility model, depending on the requirements for water, can be widely used in the medical, pharmaceutical, biotechnical, chemical, electronic and other industries and therefore meets the utility model criterion of industrial applicability.

Using the proposed installation allows, in comparison with the prototype, to obtain the following technical and economic advantages:

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-to increase the reliability, efficiency, efficiency of the installation and reduce its material consumption;

-increase the degree of steam purification and the quality of the product through the use of remote centrifugal droplet eliminators with a smaller diameter by the descending movement of the steam being cleaned.

- to master the production of domestic plants for obtaining especially pure water and free themselves from the import of less reliable and more expensive foreign plants.

The inventive installation is environmentally friendly, because all the water removed from it is used in industry:

 - Highly pure water - in medicine for intramuscular injections, in pharmaceutical and biotechnical - for the preparation of drugs, in electronic - in the production of semiconductors;

-concentrated demineralized water - for feeding boilers,

washing the dishes with technological needs; concentrated natural water for washing equipment and other technological needs. or in the chemical industry - for processing into distillate and salt products. Purified secondary steam, mainly of the first housing, can be used to sterilize plant components and other equipment.

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Claims (1)

A MULTI-STAGE DISTILLATION PLANT for producing highly pure water, containing a film evaporator, a regenerative heater, a droplet eliminator, pipelines and pipes equipped with a condenser in each stage, moreover, the branch pipe for supplying desalinated water from the regenerative heater of the first stage is connected to the pipe for introducing desalinated water the steam of the stage is running, and the pipeline for introducing heating steam from an external source - with the pipe of the heating steam of the evaporator of the same stage, o characterized in that the condenser connected by the secondary steam pipeline to the last stage evaporator is equipped with a feed pipe for feeding natural water, the last stage evaporator is equipped with a concentrated natural water pipe outlet, the stage evaporator equipped with a regenerative heater equipped with a supply pipe for desalinated feed water from the last stage evaporator, equipped with an outlet pipe for concentrated demineralized water; an evaporator located after the stage in which the evaporator is equipped It is equipped with a outlet pipe for concentrated demineralized water, it is equipped with inlet pipes through a condenser and regenerative heaters for natural water and an outlet for highly pure water, secondary vapor nozzles for stage evaporators equipped with inlet water for demineralized desalinated water are connected to the upper nozzles of the remote demister, the lower nozzles of which are connected to the nozzles of introducing purified steam into the evaporator of the next step along the steam, evaporators equipped with nozzles for introducing nutritious natural water, o nascheny integrated drop catchers.