CN112062195B - Device and method for preparing hot purified water - Google Patents
Device and method for preparing hot purified water Download PDFInfo
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- CN112062195B CN112062195B CN202010797185.9A CN202010797185A CN112062195B CN 112062195 B CN112062195 B CN 112062195B CN 202010797185 A CN202010797185 A CN 202010797185A CN 112062195 B CN112062195 B CN 112062195B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A hot purified water preparing apparatus and method, wherein the apparatus includes: the initial end condenser group is provided with an external raw material liquid inlet; the purified water inlet of the mixing heater group is communicated with the purified water outlet of the initial condenser group; the purified water inlet of the flash evaporator group is communicated with the purified water outlet of the mixing heater group; the flash evaporator group raw material liquid inlet is communicated with the initial end condenser group raw material liquid outlet; the terminal condenser group is provided with a first external steam inlet; the raw material liquid inlet of the terminal condenser group is communicated with the raw material liquid outlet of the flash evaporator group; the raw material liquid outlet of the terminal condenser group is communicated with the raw material liquid inlet of the flash evaporator group; the evaporator group is provided with a second external steam inlet; the evaporator group raw material liquid inlet is communicated with the flash evaporator group concentrated liquid outlet; the purified water outlet of the evaporator group is communicated with the purified water inlet of the flash evaporator group and the mixed heater group; the steam outlet of the evaporator group is communicated with the steam inlets of the mixing heater group and the initial end condenser group. The device can generate purified water while supplying heat and reduce the cost for preparing the hot purified water.
Description
Technical Field
The invention belongs to the field of fresh water preparation and centralized heating, and particularly relates to a device and a method for preparing hot purified water.
Background
Due to the needs of economic development, the industrial water consumption of China is kept above 1200 billions of cubic meters all year round, and meanwhile, along with the continuous deepening of the urbanization process and the continuous improvement of the living standard of people, the domestic water consumption is increased year by year, and the problem of water resource shortage is increasingly prominent, especially in the northern area. On the premise that the total amount of water resources is basically stable, fresh water preparation technologies such as seawater desalination and waste water recycling are the most fundamental means for solving the problem of water resource shortage. Sea water desalination not only has important application significance in China, but also depends on sea water desalination technology to meet the demand of fresh water in many countries in the world. Sea water desalination is an important and reliable fresh water resource in middle east countries such as Saudi Arabia, the Arabia Unicacique Coikari and the like. Taking seawater desalination as an example, the current global seawater desalination technology exceeds more than 20, and the three methods, namely multi-stage flash evaporation, low-temperature multi-effect distillation and reverse osmosis, which are successfully and commercially applied at present are restricted by the technical maturity and economic cost. Wherein, the flash evaporation method has large yield, strong controllability and high energy consumption; the multi-effect distillation method has low operation temperature, effectively reduces corrosion, but needs larger heat transfer area and high initial investment; the reverse osmosis method does not need to consume steam, but is restricted by the permeable membrane, so the running cost is higher. Therefore, the development of a hydrothermal coproduction technology with high energy utilization efficiency and low operation cost by combining the traditional fresh water preparation and centralized heat supply has important significance for efficiently solving the problems of water resource shortage and clean heat supply.
Disclosure of Invention
Objects of the invention
The invention aims to provide a device and a method for preparing hot purified water, which can generate purified water while supplying heat and reduce the cost for preparing the purified water.
Second, technical scheme
To solve the above problems, a first aspect of the present invention provides a hot purified water preparing apparatus including: the initial end condenser group is provided with an external raw material liquid inlet; the purified water inlet of the mixed heater group is communicated with the purified water outlet of the initial condenser group; the purified water inlet of the flash evaporator group is communicated with the purified water outlet of the mixing heater group; a raw material liquid inlet of the flash evaporator group is communicated with a raw material liquid outlet of the initial end condenser group; a terminal condenser group provided with a first external steam inlet; a raw material liquid inlet of the terminal condenser group is communicated with a raw material liquid outlet of the flash evaporator group; a raw material liquid outlet of the terminal condenser group is communicated with a raw material liquid inlet of the flash evaporator group; an evaporator set provided with a second external steam inlet; a raw material liquid inlet of the evaporator group is communicated with a concentrated liquid outlet of the evaporator group; the purified water outlet of the evaporator group is communicated with the purified water inlets of the flash evaporator group and the mixing heater group; and the steam outlet of the evaporator group is communicated with the steam inlets of the mixing heater group and the initial end condenser group.
Optionally, the above hot purified water preparing apparatus further comprises: the flash tank group, set up in the concentrate export of flash tank group with on the pipeline of the raw materials liquid import intercommunication of evaporator group, be used for right the concentrate that flash tank group flows carries out the flash distillation.
Optionally, the preheater group is disposed on a pipeline connecting the start-end condenser group and the flash evaporator group, and is configured to heat the raw material liquid flowing out of the start-end condenser group and then convey the heated raw material liquid into the flash evaporator group. .
Optionally, the above hot purified water preparing apparatus further comprises: a reflux pump set; the liquid pumping port of the reflux pump set is communicated with the concentrated liquid outlet of the flash evaporator set; and the liquid outlet of the reflux pump set is communicated with the raw material liquid outlet of the flash evaporator set.
Optionally, the evaporator group comprises N evaporators; the second external steam inlet is formed in the Nth evaporator; a concentrated solution outlet is formed in the 1 st evaporator, and a steam outlet of the first evaporator is communicated with a steam inlet of the starting end condenser group; the concentrated solution outlet of the nth evaporator is communicated with the concentrated solution inlet of the (n-1) th evaporator; the steam outlet of the nth evaporator is communicated with the steam inlet of the nth-1 evaporator, wherein N is more than or equal to N and is more than 1.
Optionally, the set of mixing heaters comprises P mixing heaters; the purified water outlet of the No. P mixing heater is communicated with the purified water inlet of the flash evaporator group; a purified water inlet of the 1 st mixed heater is communicated with a purified water outlet of the initial condenser group; the purified water inlet of the pth mixed heater is communicated with the purified water outlet of the pth-1 mixed heater; wherein, P is more than or equal to P and is more than 1.
Optionally, the flash tank group comprises Q flash tanks; the raw material liquid inlet of the Q flash tank is communicated with the raw material liquid outlet of the flash tank group; the concentrated solution outlet of the q flash tank is communicated with the raw material solution inlet of the q-1 flash tank; wherein Q is more than or equal to Q and is more than 1.
Optionally, the preheater group comprises R preheaters; the raw material liquid outlet of the Rth preheater is communicated with the raw material liquid inlet of the flash evaporator group; a raw material liquid inlet of the 1 st preheater is communicated with a raw material liquid outlet of the initial end condenser group; a raw material liquid inlet of the r preheater is communicated with a raw material liquid outlet of the r-1 preheater; wherein R is more than or equal to R and more than 1.
Optionally, the flash train comprises M flash vessels; a raw material liquid inlet of the Mth flash evaporator is communicated with a raw material liquid outlet of the initial end condenser group; the purified water inlet of the Mth flash evaporator is communicated with the purified water outlet of the mixing heater group; a raw material liquid outlet of the Mth flash evaporator is communicated with a raw material liquid inlet of the evaporator group; the raw material liquid outlet of the 1 st flash evaporator is communicated with the raw material liquid inlet of the terminal condenser group; a concentrated solution inlet of the 1 st flash evaporator is communicated with a raw material solution outlet of the terminal condenser group; the raw material liquid outlet of the mth flash evaporator is communicated with the raw material liquid inlet of the (m-1) th flash evaporator; the concentrated solution inlet of the mth flash evaporator is communicated with the concentrated solution outlet of the (m-1) th flash evaporator; wherein M is more than or equal to M and more than 1.
Optionally, the flash evaporator group comprises S sections, and each section is provided with the M flash evaporators; the purified water inlet of the Mth flash evaporator of the S section is communicated with the purified water outlet of the preheater; and the purified water outlet of the Mth flash evaporator of the s group is communicated with the purified water inlet of the Mth flash evaporator of the s-1 group.
Optionally, the terminal condenser group comprises S condensers; each condenser is provided with a first external steam inlet.
Optionally, the feed solution is at least one of: sea water, river water, lake water, underground water, sewage, wastewater, and reclaimed water.
A second aspect of the present invention provides a method for preparing hot purified water using the apparatus for preparing hot purified water according to the first aspect of the present invention.
Third, beneficial effect
The technical scheme of the invention has the following beneficial technical effects:
the hot purified water preparation device can generate purified water while supplying heat, and reduces the cost for preparing hot purified water.
Drawings
Fig. 1 is a schematic structural view of a hot purified water producing apparatus according to embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a hot purified water producing apparatus according to embodiment 2 of the present invention;
fig. 3 is a schematic structural view of a hot purified water preparing apparatus according to embodiment 3 of the present invention;
fig. 4 is a schematic structural view of a hot purified water preparing apparatus according to embodiment 4 of the present invention.
Reference numerals are as follows:
1: an evaporator; 1-A: a vapor collection zone; 1-B: a raw material liquid spraying heating area; 1-C a concentrated solution collecting region; 1-0: a concentrate inlet of the evaporator; 1-1: a vapor inlet of the evaporator; 1-2: a feed inlet of the evaporator; 1-3: a vapor outlet of the evaporator; 1-4: a concentrate outlet of the evaporator; 1-5: a purified water outlet of the evaporator;
2: a mixing heater; 2-1: a steam inlet of the hybrid heater; 2-2: a second purified water inlet; 2-3: a first purified water inlet; 2-4: a purified water outlet of the mixing heater;
3: a flash tank; 3-1: a feed inlet of the flash tank; 3-2: a second concentrate outlet; 3-3: a vapor outlet of the flash tank; 3-4: a first concentrate outlet;
4: a preheater; 4-1: a feed solution inlet of the preheater; 4-2: a raw material liquid outlet of the preheater; 4-3: a first steam inlet; 4-4: a purified water outlet of the preheater; 4-5: a second steam inlet;
5: a flash evaporator; 5-A, heating the raw material liquid; 5-B: a purified water generation zone; 5-C: a flash evaporator raw material liquid flash evaporation zone; 5-D, heating purified water; 5-1: a raw material liquid inlet of the flash evaporator; 5-2: a purified water inlet of the flash evaporator; 5-3: a feed solution outlet of the flash vessel; 5-4: a purified water outlet of the flash evaporator; 5-5: a concentrated solution inlet of the flash evaporator; 5-6: a concentrated solution outlet of the flash evaporator; 5-7: a purified water inlet of the heating area; 5-8: a purified water outlet of the heating zone;
6: a terminal condenser; 6-1: a first external steam inlet; 6-2: a purified water outlet of the terminal condenser; 6-3: a raw material liquid inlet of the terminal condenser; 6-4: a raw material liquid outlet of the terminal condenser; 6-5: a purified water inlet of the terminal condenser;
7: a start-end condenser; 7-1: a raw material liquid inlet of the initial condenser; 7-2: a raw material liquid outlet of the initial end condenser; 7-3: a steam inlet of the start condenser; 7-4: a purified water outlet of the initial condenser;
8: a reflux pump; 8-1: a liquid extraction port; 8-2: and a liquid outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It is to be understood that these descriptions are only illustrative and are not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the drawings a schematic view of a layer structure according to an embodiment of the invention is shown. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
Fig. 1 is a schematic structural view of a hot purified water producing apparatus according to embodiment 1 of the present invention.
As shown in fig. 1, the present embodiment provides a hot purified water preparation apparatus, which includes a starting condenser group provided with an external raw material liquid inlet; the purified water inlet of the mixing heater group is communicated with the purified water outlet of the initial end condenser group; the purified water inlet of the flash evaporator group is communicated with the purified water outlet of the mixing heater group; a raw material liquid inlet of the flash evaporator group is communicated with a raw material liquid outlet of the initial end condenser group; a terminal condenser group provided with a first external steam inlet; a raw material liquid inlet of the terminal condenser group is communicated with a raw material liquid outlet of the flash evaporator group; a raw material liquid outlet of the terminal condenser group is communicated with a raw material liquid inlet of the flash evaporator group; an evaporator set provided with a second external steam inlet; a raw material liquid inlet of the evaporator group is communicated with a concentrated liquid outlet of the evaporator group; the purified water outlet of the evaporator group is communicated with the purified water inlets of the flash evaporator group and the mixing heater group; the steam outlet of the evaporator group is communicated with the steam inlets of the mixing heater group and the initial end condenser group; the flash tank group is arranged on a pipeline for communicating a concentrated solution outlet of the flash tank group with a raw material solution inlet of the evaporator group and is used for carrying out flash evaporation on the concentrated solution flowing out of the flash tank group; the preheating unit group is arranged on a pipeline communicated with the flash evaporator group and used for heating the raw material liquid flowing out of the start condenser group and then conveying the raw material liquid into the flash evaporator group. . A liquid outlet of the reflux pump group is communicated with a concentrated liquid outlet of the flash evaporator group; and a liquid outlet of the reflux pump set is communicated with a raw material liquid outlet of the flash evaporator set.
In particular, the evaporator group comprises N evaporators 1; the second external steam inlet 1-1 is arranged on the Nth evaporator 1; a concentrated solution outlet 1-4 is arranged on the 1 st evaporator 1, and a steam outlet 1-3 of the 1 st evaporator 1 is communicated with a steam inlet of the starting end condenser group; a concentrated solution outlet 1-4 of the nth evaporator 1 is communicated with a concentrated solution inlet 1-0 of the nth-1 evaporator 1; the steam outlet 1-3 of the nth evaporator 1 is communicated with the steam inlet 1-1 of the nth-1 evaporator 1, wherein N is more than or equal to N and is more than 1. The evaporator 1 of the embodiment comprises a steam collecting area 1-A which is positioned at the upper part of the evaporator 1 and is provided with a steam outlet 1-3; a raw material liquid spraying heating area 1-B, which is positioned in the middle of the evaporator 1 and is provided with a raw material liquid inlet 1-2 and a steam inlet 1-1; a concentrated solution collecting area 1-C which is positioned at the bottom of the evaporator 1 and is provided with a concentrated solution outlet 1-4, and the concentrated solution collecting areas 1-C of other evaporators 1 are also provided with concentrated solution inlets 1-0 except the Nth evaporator 1; when the device is used, steam enters the pipeline of the raw material liquid spraying heating area 1-B from the steam inlet, the raw material liquid is sprayed to the outside of the pipeline from the raw material liquid inlet to be heated, the generated steam enters the steam collecting area 1-A, and the rest concentrated liquid enters the concentrated liquid collecting area 1-C and is discharged from the concentrated liquid outlet 1-4 section of the evaporator 1.
The mixing heater group comprises P mixing heaters 2; the purified water outlet 2-4 of the No. P mixing heater 2 is communicated with the purified water inlet of the flash evaporator group; a purified water inlet of the 1 st mixing heater 2 is communicated with a purified water outlet of the initial end condenser group; the purified water inlet of the p-th mixed heater 2 is communicated with the purified water outlet 2-4 of the p-1-th mixed heater 2; wherein, P is more than or equal to P and is more than 1.
The flash tank group comprises Q flash tanks 3; a raw material liquid inlet 3-1 of the Q flash tank 3 is communicated with a raw material liquid outlet of the flash unit; a second concentrated solution outlet 3-2 of the q-th flash tank 3 is communicated with a raw material solution inlet 3-1 of the q-th flash tank 3; wherein Q is more than or equal to Q and is more than 1.
The preheater group comprises R preheaters 4; a raw material liquid outlet 4-2 of the R-th preheater 4 is communicated with a raw material liquid inlet of the flash evaporator group; a raw material liquid inlet 4-1 of the 1 st preheater 4 is communicated with a raw material liquid outlet of the initial end condenser group; a raw material liquid inlet 4-1 of the r-th preheater 4 is communicated with a raw material liquid outlet 4-2 of the r-1-th preheater 4; wherein R is more than or equal to R and more than 1.
The flash evaporator group comprises M flash evaporators 5; a raw material liquid inlet 5-1 of the Mth flash evaporator 5 is communicated with a raw material liquid outlet of the initial end condenser group; a purified water inlet 5-2 of the Mth flash evaporator 5 is communicated with a purified water outlet of the mixing heater group; a raw material liquid outlet 5-3 of the Mth flash evaporator 5 is communicated with a raw material liquid inlet of the evaporator group; a raw material liquid outlet 5-3 of the 1 st flash evaporator 5 is communicated with a raw material liquid inlet of the terminal condenser group; a concentrated solution inlet 5-5 of the 1 st flash evaporator 5 is communicated with a raw material solution outlet of the terminal condenser group; purified water of the 1 st flash evaporator 5 is discharged and then communicated with a purified water inlet of the terminal condenser group; a raw material liquid outlet 5-3 of the mth flash evaporator 5 is communicated with a raw material liquid inlet 5-1 of the m-1 flash evaporator 5; a purified water outlet 5-4 of the mth flash evaporator 5 is communicated with a purified water inlet 5-2 of the (m-1) th flash evaporator 5; a concentrated solution inlet 5-5 of the mth flash evaporator 5 is communicated with a concentrated solution outlet 5-6 of the (m-1) th flash evaporator 5; wherein M is more than or equal to M and more than 1. The flash evaporator 5 of the present embodiment includes: 5-C of a raw material liquid flash evaporation zone: the concentrated solution inlet and the concentrated solution outlet are arranged at the bottom of the flash evaporator 5; and 5-B purified water generation area: the middle part of the flash evaporator 5 is provided with a purified water inlet and a purified water outlet; raw material liquid heating zone 5-A: and the upper part of the flash evaporator 5 is provided with a raw material liquid inlet and a raw material liquid outlet. The concentrated solution enters the raw material solution flash evaporation zone 5-C for flash evaporation, the generated steam flows upwards and is divided into two parts, one part enters the raw material solution heating zone 5-A for heating the raw material solution, and the other part enters the purified water generation zone 5-B for heating the purified water and is condensed into condensed water to be blended into the purified water. The raw material liquid heating zone 5-A is of a dividing wall type structure; and steam generated by the raw material liquid flash evaporation zone 5-C enters the raw material liquid heating zone 5-A, is condensed on one side of the heat transfer wall, releases the condensation heat, becomes condensed water, falls into the purified water generation zone 5-B and is blended with purified water.
The reflux pump group comprises M reflux pumps 8, and a liquid pumping port 8-1 of the mth reflux pump 8 is communicated with a concentrated liquid outlet 5-6 of the mth flash evaporator 5; and a section liquid port of the mth reflux pump 8 is communicated with a raw material liquid outlet 5-3 of the mth flash evaporator 5 and used for pumping part of concentrated liquid and heating the concentrated liquid again so as to improve the preparation efficiency of purified water.
The start condenser group of the present embodiment includes a start condenser 7; and N-1 ═ P ═ Q ═ R.
The flash tank 3 of this embodiment includes a first concentrated liquid outlet 3-4 and a second concentrated liquid outlet 3-2, wherein the first concentrated liquid outlet 3-4 is communicated with the raw material liquid inlet 1-2 of the evaporator 1, and the second concentrated liquid outlet 3-2 is communicated with the raw material liquid inlet 3-1 of the next-stage flash tank 3 or the raw material liquid inlet 1-2 of the evaporator 1.
The mixing heater 2 comprises a first purified water inlet 2-3 and a second purified water inlet 2-2; wherein, the first purified water inlet 2-3 is communicated with the purified water outlet 7-4 of the initial condenser 7 or the purified water outlet 2-4 of the upper stage mixing heater 2, and the second purified water inlet 2-2 is communicated with the purified water outlet 4-4 of the preheater 4.
Wherein, a purified water outlet 1-5 of the 1 st evaporator 1 is communicated with a second purified water inlet 2-2 of the 1 st mixing heater 2; a second concentrated solution outlet 3-2 of the 1 st flash tank 3 is communicated with a raw material solution inlet 1-2 of the 1 st evaporator 1; a first concentrated solution outlet 3-4 of the 1 st flash tank 3 is communicated with a raw material solution inlet 1-2 of the 2 nd evaporator 1; a second concentrated liquid outlet 3-2 of the q flash tank 3 is communicated with a raw material liquid inlet 3-1 of the q-1 flash tank 3; a first concentrated solution outlet 3-4 of the qth flash tank 3 is communicated with a raw material solution inlet 1-2 of the nth evaporator 1; a steam outlet 3-3 of the qth flash tank 3 is communicated with a second steam inlet 4-5 of the r preheater 4; a purified water outlet 4-4 of the r-th preheater 4 is communicated with a second purified water inlet 2-2 of the p-th mixing heater 2; a first steam inlet 4-3 of the r-th preheater 4 is communicated with a steam outlet 1-3 of the n-th evaporator 1; the vapor outlet 1-3 of the nth evaporator 1 is also communicated with the vapor inlet 2-1 of the pth mixed heater 2; wherein n-1 ═ p ═ q ═ r.
Optionally, the raw material liquid is at least one of the following: sea water, river water, lake water, groundwater, sewage, wastewater, and reclaimed water.
Example 2
Fig. 2 is a schematic structural view of a hot purified water preparation apparatus according to embodiment 2 of the present invention.
As shown in fig. 2, this embodiment provides a hot purified water preparing apparatus, and is different from embodiment 1 in that the concentrate outlet 1-4 of the evaporator 1 of this embodiment is not communicated with the concentrate inlet 1-0 of the next evaporator 1, and the concentrate outlet 1-4 of each evaporator 1 is directly communicated with the outside. Example 3
Fig. 3 is a schematic structural view of a hot purified water preparing apparatus according to embodiment 3 of the present invention.
As shown in fig. 3, the present embodiment provides a hot purified water preparing apparatus, and is different from embodiment 1 in that:
the M flash evaporators 5 in the embodiment 1 are only provided with 1 section, the flash evaporator group in the embodiment comprises S sections, and each section is provided with the M flash evaporators 5; the terminal condenser group of embodiment 1 includes 1 terminal condenser, and the terminal condenser group of this embodiment includes S terminal condensers 6.
A purified water inlet 5-2 of the Mth flash evaporator 5 of the S section is communicated with a purified water outlet 4-4 of the preheater 4; and a purified water outlet 5-8 of the heating zone of the Mth flash evaporator 5 at the S-section is communicated with a purified water inlet 5-7 of the heating zone of the Mth flash evaporator 5 at the S-1 section, and a purified water outlet 5-4 of the Mth flash evaporator 5 at the 1-section is communicated with a purified water outlet of the 1-th condenser, wherein S is more than or equal to S and is more than 1.
In this embodiment, the M-th flash evaporator 5 of each stage is further provided with a purified water heating zone 5-D above the raw material liquid heating zone 5-a, and the purified water generation zone 5-B of the M-th flash evaporator 5 is not provided with a purified water inlet; the purified water heating zone 5-D is also provided with a purified water inlet 5-7 of the heating zone and a purified water outlet 5-8 of the heating zone; and a purified water inlet 5-7 of the heating zone of the Mth flash evaporator 5 of the S section is communicated with a purified water outlet 2-4 of the P mixing heater 2.
The embodiment comprises S terminal condensers 6, and each terminal condenser 6 is provided with a first external steam inlet 6-1; a purified water outlet 6-2 of the s-th terminal condenser 6 is communicated with a purified water outlet 6-2 of the s-1-th terminal condenser; and a pure water outlet 6-2 of the 1 st terminal condenser is communicated with the outside.
A raw material liquid outlet 5-3 of the 1 st flash evaporator 5 in the s section is communicated with a raw material liquid inlet 6-3 of the s terminal condenser; a concentrated solution inlet 5-5 of the 1 st flash evaporator 5 of the s section is communicated with a raw material solution outlet 6-4 of the s terminal condenser; and a purified water outlet 5-4 of the 1 st flash evaporator 5 at the s section is communicated with a purified water outlet 6-2 of the s terminal condenser.
A raw material liquid inlet 5-1 of the Mth flash evaporator 5 of the 1 st section is communicated with a raw material liquid outlet 4-2 of the Rth preheater 4; a concentration outlet of the Mth flash evaporator 5 of the S section is communicated with a raw material liquid inlet 3-1 of the Qth flash evaporator 3; the raw material liquid inlet 5-1 of the Mth flash evaporator 5 at the s section is communicated with the concentrated liquid outlet 5-6 of the Mth flash evaporator 5 at the s-1 section.
Example 4
Fig. 4 is a schematic structural view of a hot purified water preparing apparatus according to embodiment 4 of the present invention.
As shown in fig. 4, the present embodiment provides a hot purified water preparing apparatus, and is different from embodiment 3 in that:
a purified water inlet 5-2 is arranged on the purified water generating area 5-B of the Mth flash evaporator 5;
a purified water outlet 6-4 of the s-th terminal condenser 6 is communicated with a purified water inlet 5-2 of the 1 st flash evaporator 5 of the s-th section; a purified water inlet 5-2 of the mth flash evaporator 5 in the s section is communicated with a purified water outlet 5-4 of the mth-1 flash evaporator 5 in the s section; and a purified water outlet 5-4 of the Mth flash evaporator 5 at the s section is communicated with a purified water inlet 5-7 of the heating zone of the Mth flash evaporator 5 at the s section.
Example 5
This example provides a method of preparing hot purified water, in particular, hot purified water using the apparatus of example 1.
The raw material liquid enters the apparatus for producing hot purified water of example 1 from the raw material liquid inlet 7-1 of the initial condenser 7, flows through the 1 st, 2 nd, … … th, R-1 th and R th preheaters 4 in sequence after flowing out from the raw material liquid outlet 7-2 of the initial condenser 7, is heated one by one, flows out from the raw material liquid outlet 4-2 of the preheater 4 on the R th preheater 4, then flows through the flash evaporator 5 raw material liquid heating zone 5-A of the M, M-1 st, … … th, 2 th and 1 st flash evaporators 5 in sequence, is further heated one by one, flows out from the raw material liquid outlet 5-3 of the flash evaporator 5 on the 1 st flash evaporator 5, enters the final condenser 6, is further heated, is discharged from the raw material liquid outlet 6-4 of the final condenser 6 on the final condenser 6, and then sequentially enters the 1 st, b, c, 2.… …, M-1 and M flash evaporator 5 raw material liquid flash evaporation areas 5-C are subjected to flash evaporation, are cooled and concentrated one by one, finally flow out from a concentrated liquid outlet 5-6 of the flash evaporator 5 of the Mth flash evaporator 5 in a low-temperature and high-concentration state, part of concentrated liquid is pumped by the Mth reflux pump 8, the rest concentrated liquid is discharged and then sequentially subjected to flash evaporation through Q, Q-1, … …, 2 and 1 flash evaporator 3, and is cooled and concentrated one by one, wherein the concentrated liquid of each flash evaporator 3 is divided into 2 strands, one strand flows to the next flash evaporator 3, the other strand flows to the evaporator 1 raw material liquid spraying area 1-B in the corresponding evaporator 1 and is heated, evaporated and concentrated, and finally is collected in the evaporator 1 concentrated liquid collecting area 1-C in the corresponding evaporator 1; after the concentrated solution of the evaporator 1 in the Nth evaporator 1 is discharged from a concentrated solution outlet 1-4 of the Nth evaporator 1, the concentrated solution sequentially passes through an evaporator 1 concentrated solution gathering area 1-C of the N-1, … …, 3, 2 and 1 evaporator 1, and finally is discharged from the device at a concentrated solution outlet 1-4 of the evaporator 1 of the 1 st evaporator 1.
During the process of the raw material liquid flowing from the Mth flash evaporator 5 to the 1 st flash evaporator 3, the mth reflux pump 8 pumps a part of the concentrated liquid from the concentrated liquid outlet 5-6 of the flash evaporator 5 of the mth flash evaporator 5 to the raw material liquid pipeline, mixes with the raw material liquid flowing out of the raw material liquid outlet 5-3 of the flash evaporator 5 of the mth flash evaporator 5, and enters the raw material liquid inlet 5-1 of the flash evaporator 5 of the M-1 st flash evaporator 5 together; the 1 st reflux pump 8 extracts a part of concentrated solution from a concentrated solution outlet 5-6 of the flash evaporator 5 of the 1 st flash evaporator 5, sends the part of concentrated solution to a raw material solution pipeline, mixes the part of concentrated solution with raw material solution flowing out from a raw material solution outlet 5-3 of the flash evaporator 5 of the 1 st flash evaporator 5, and enters the terminal condenser 6 through a raw material solution inlet 6-3 of the terminal condenser 6.
The reflux pump 8 has the function of improving the concentration rate of the whole device, and can prepare more purified water under the condition of the same flow of raw material liquid; the advantage of dispersing reflux one by one is that each heat transfer temperature difference can be optimized, and finally the total heat transfer area of the whole device is reduced, thereby reducing the initial investment cost.
The purified water is generated by condensing the steam from the 1 st evaporator 1 in the tube bundle of the initial condenser 7 and flows to the 1 st mixing heater 2; in addition, purified water is generated in the tube bundle of the raw material liquid spraying area 1-B of the evaporator 1 on each evaporator 1 and each flash tank 3, and the corresponding evaporator 1 and the purified water discharged from the corresponding flash tank 3 are mixed and then enter the corresponding mixing heater 2 to be heated; purified water flowing out of the initial condenser 7 sequentially passes through the 1 st, 2 nd, … … th, P-1 th and P th mixing heaters 2, converges one by one, is heated one by one, sequentially passes through the M, M-1 st, … … th, 2 nd, 1 st flash evaporator 5 and the purified water generation area 5-B of each flash evaporator 5, is heated, receives purified water newly generated by each flash evaporator 5, then flows out of the 5-4 sections of the purified water outlet of the flash evaporator 5 of the 1 st flash evaporator 5, flows to the final condenser 6 to be heated for the last time, receives purified water condensed by first external steam in the final condenser 6, and finally flows out of the 6-2 sections of the final condenser purified water outlet 6-2 of the final condenser 6.
The steam used in the production method of this example includes the first external steam, the steam generated by evaporating the second external steam raw material liquid in the evaporator 1, the steam generated in the flash tank 3, and the steam generated in the flash evaporator 5. The first external steam enters the terminal condenser 6 through the terminal condenser steam inlet 6-1 and finally is condensed into pure water, and the second external steam enters the Nth evaporator 1 through the steam inlet 1-1 of the evaporator 1 on the Nth evaporator 1 to serve as a heat source. The steam generated by the nth evaporator 1 is divided into 3 shares, the 1 st share enters the pth mixed heater 2, the 2 nd share enters the nth preheater 4, the 3 rd share enters the (N-1) th evaporator 1 as a steam heat source, and the steam generated by the nth evaporator 1 enters the initial condenser 7 as a steam heat source; the steam generated by the qth flash tank 3 enters the qth preheater 4 as a source of steam heat.
Example 6
This example provides a method for preparing hot purified water, and in particular, hot purified water using the apparatus for preparing hot purified water of example 2.
The preparation method of the present example is different from that of example 5 in that:
since the concentrate outlet 1-4 of the evaporator 1 of embodiment 2 is not communicated with the concentrate inlet 1-0 of the next evaporator 1, the concentrate outlet 1-4 of each evaporator 1 is directly communicated with the outside. The concentrate from the evaporators 1 is discharged directly from the apparatus through the concentrate outlets 1-4 of each evaporator 1. .
Example 7
This example provides a method for preparing hot purified water, and particularly, hot purified water using the apparatus for preparing hot purified water of example 3.
The preparation method of this example differs from that of example 5 in that:
the raw material liquid enters M flash evaporators 5 in the S section from the Rth preheater 4, is sequentially heated step by step and is subjected to flash evaporation concentration step by step and temperature reduction S x M times, and then enters the Q-th flash tank 3.
Purified water flows out from a purified water outlet 2-4 of the P-th mixing heater 2, sequentially flows through an M-th stage flash evaporator 5 purified water heating zone 5-D of an M-th flash evaporator 5 of Z, Z-1, … …, 2 and 1 sections, is heated step by step and is discharged.
Purified water flows out from a purified water outlet 5-4 of the 1 st flash evaporator 5 in the S section and is converged with purified water generated by the initial condenser 6, and then is converged with the purified water generated by the M flash evaporators 5 and the final condenser 6 in the S-1, S-2, … …, 2 and 1 sections in sequence, and finally is discharged out of the device.
Example 8
This example provides a method for preparing hot purified water, and particularly, hot purified water using the apparatus for preparing hot purified water of example 4.
The preparation method of this example differs from that of example 7 in that:
purified water generated by the s-th terminal condenser 6 flows out of a purified water outlet 6-2 of the terminal condenser 6, sequentially passes through flash evaporators 5 of the 1 st, 2 nd, … … th, M-1 st and M-stage flash evaporators 5 of corresponding sections, and is heated in a purified water generation area 5-B, receives purified water newly generated by each flash evaporator 5, is discharged from a purified water outlet 5-4 of the M-th flash evaporator 5, and enters a heated area purified water inlet 5-7 of the M-stage flash evaporator 5 to be converged;
purified water in the heating zone of the Mth flash evaporator 5 of each section is discharged out of the device after the Mth flash evaporator 5 of the 1 st section is converged.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modifications, equivalents, improvements and the like which are made without departing from the spirit and scope of the present invention shall be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A hot purified water preparing apparatus, comprising:
the initial end condenser group is provided with an external raw material liquid inlet;
the purified water inlet of the mixed heater group is communicated with the purified water outlet of the initial condenser group;
the purified water inlet of the flash evaporator group is communicated with the purified water outlet of the mixing heater group; a raw material liquid inlet of the flash evaporator group is communicated with a raw material liquid outlet of the initial end condenser group;
a terminal condenser group provided with a first external steam inlet; a raw material liquid inlet of the terminal condenser group is communicated with a raw material liquid outlet of the flash evaporator group; a raw material liquid outlet of the terminal condenser group is communicated with a raw material liquid inlet of the flash evaporator group;
an evaporator set provided with a second external steam inlet; a raw material liquid inlet of the evaporator group is communicated with a concentrated liquid outlet of the evaporator group; the purified water outlet of the evaporator group is communicated with the purified water inlets of the flash evaporator group and the mixing heater group; the steam outlet of the evaporator group is communicated with the steam inlets of the mixing heater group and the initial end condenser group;
the flash tank group is arranged on a pipeline which is communicated with a concentrated solution outlet of the flash unit group and a raw material solution inlet of the evaporator group and is used for carrying out flash evaporation on the concentrated solution flowing out of the flash unit group;
the preheater group is arranged on a pipeline communicated with the starting end condenser group and the flash evaporator group and is used for heating the raw material liquid flowing out of the starting end condenser group and then conveying the heated raw material liquid into the flash evaporator group;
the liquid pumping port of the reflux pump set is communicated with the concentrated liquid outlet of the flash evaporator set;
and a liquid outlet of the reflux pump set is communicated with a raw material liquid outlet of the flash evaporator set.
2. Apparatus for the preparation of hot purified water according to claim 1, characterized in that the evaporator group comprises N evaporators (1);
the second external steam inlet is arranged on the Nth evaporator (1);
a concentrated solution outlet (1-4) is formed in the 1 st evaporator (1), and a steam outlet (1-3) of the 1 st evaporator (1) is communicated with a steam inlet of the starting end condenser group;
a concentrated solution outlet (1-4) of the nth evaporator (1) is communicated with a concentrated solution inlet (1-0) of the nth-1 evaporator (1); the steam outlet (1-3) of the nth evaporator (1) is communicated with the steam inlet (1-1) of the nth-1 evaporator (1), wherein N is more than or equal to N and is more than 1.
3. The apparatus for preparing hot purified water according to claim 1, wherein the mixing heater group includes P mixing heaters (2);
a purified water outlet (2-4) of the No. P mixing heater (2) is communicated with a purified water inlet of the flash evaporator group;
a purified water inlet of the 1 st mixing heater (2) is communicated with a purified water outlet of the initial end condenser group;
the purified water inlet of the pth mixed heater (2) is communicated with the purified water outlet (2-4) of the pth mixed heater (2-1); wherein, P is more than or equal to P and is more than 1.
4. The apparatus for preparing hot purified water according to claim 1, wherein the flash tank set comprises Q flash tanks (3);
a raw material liquid inlet (3-1) of the Q flash tank (3) is communicated with a raw material liquid outlet of the flash unit;
the concentrated solution outlet of the q flash tank (3) is communicated with the raw material solution inlet (3-1) of the q-1 flash tank (3); wherein Q is more than or equal to Q and is more than 1.
5. The apparatus for preparing hot purified water according to claim 1, wherein the group of preheaters comprises R preheaters (4);
a raw material liquid outlet (4-2) of the Rth preheater (4) is communicated with a raw material liquid inlet of the flash evaporator group;
a raw material liquid inlet (4-1) of the 1 st preheater (4) is communicated with a raw material liquid outlet of the initial end condenser group;
a raw material liquid inlet (4-1) of the r-th preheater (4) is communicated with a raw material liquid outlet (4-2) of the r-1-th preheater (4); wherein R is more than or equal to R and more than 1.
6. The apparatus for preparing hot purified water according to claim 1, wherein the set of flash evaporators comprises M flash evaporators (5);
a raw material liquid inlet (5-1) of the Mth flash evaporator (5) is communicated with a raw material liquid outlet of the initial end condenser group; a purified water inlet (5-2) of the Mth flash evaporator (5) is communicated with a purified water outlet of the mixing heater group; a raw material liquid outlet (5-3) of the Mth flash evaporator (5) is communicated with a raw material liquid inlet of the evaporator group;
a raw material liquid outlet (5-3) of the 1 st flash evaporator (5) is communicated with a raw material liquid inlet of the terminal condenser group; a concentrated solution inlet (5-5) of the 1 st flash evaporator (5) is communicated with a raw material solution outlet of the terminal condenser group;
a raw material liquid outlet (5-3) of the mth flash evaporator (5) is communicated with a raw material liquid inlet (5-1) of the (m-1) flash evaporator (5); a concentrated solution inlet (5-5) of the mth flash evaporator (5) is communicated with a concentrated solution outlet (5-6) of the (m-1) flash evaporator (5); wherein M is more than or equal to M and more than 1.
7. The apparatus for preparing hot purified water according to claim 6, wherein the flash evaporator group comprises S sections, each section being provided with the M flash evaporators (5);
a purified water inlet (5-2) of the Mth flash evaporator (5) at the S section is communicated with a purified water outlet of the preheater group;
a purified water outlet (5-4) of the Mth flash evaporator (5) of the s-section is communicated with a purified water inlet (5-2) of the Mth flash evaporator (5) of the s-1 section; wherein S is more than or equal to S and more than 1.
8. The apparatus for preparing hot purified water according to claim 7, wherein the terminal condenser group includes S terminal condensers;
each terminal condenser (6) is provided with a first external steam inlet (6-1).
9. The apparatus for preparing hot purified water according to claim 1,
the raw material liquid is at least one of the following components: sea water, river water, lake water, underground water, sewage, wastewater, and reclaimed water.
10. A method for preparing hot purified water, characterized by preparing hot purified water using the hot purified water preparing apparatus of any one of claims 1 to 9.
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| CN1554589A (en) * | 2003-12-26 | 2004-12-15 | 国家***天津海水淡化与综合利用研 | High efficiency sea water desalination device and method by distillation |
| CN101462780A (en) * | 2009-01-23 | 2009-06-24 | 国家***天津海水淡化与综合利用研究所 | Low temperature multiple-effect distillation seawater desalination system and process flow thereof |
| CN203549771U (en) * | 2013-11-13 | 2014-04-16 | 冯延磊 | Utilizing system for high-pressure-digestion new steam condensate water secondary steam |
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