CN213537331U - Horizontal evaporation plant for salt-containing wastewater - Google Patents
Horizontal evaporation plant for salt-containing wastewater Download PDFInfo
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- CN213537331U CN213537331U CN202022226673.2U CN202022226673U CN213537331U CN 213537331 U CN213537331 U CN 213537331U CN 202022226673 U CN202022226673 U CN 202022226673U CN 213537331 U CN213537331 U CN 213537331U
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Abstract
The utility model belongs to the technical field of waste water evaporation and concentration, in particular to a horizontal evaporator for salt-containing waste water, which comprises a horizontally installed evaporator shell and an inlet water distribution device, wherein the salt-containing waste water enters the inside of the evaporator shell through the inlet water distribution device; a hollow shaft penetrates through the evaporator shell, one end of the hollow shaft is connected with a driving device, the other end of the hollow shaft is provided with a steam inlet, an annular rotating blade is sleeved on the hollow shaft, the annular rotating blade is of an internal hollow structure and is communicated with the hollow shaft, and a plurality of steam holes are formed in the hollow shaft; and a harrow type vibration scraper is respectively arranged between two adjacent annular rotating blades. The device can prevent scaling in the operation process, does not need any chemical cleaning, and does not produce secondary pollution in the use process; the device has the advantages of high heat transfer rate, high heat efficiency, short evaporation time and less heat source consumption, and can effectively reduce the running cost of the evaporator.
Description
Technical Field
The utility model belongs to the technical field of contain salt waste water and thermal power factory desulfurization technology waste water evaporative concentration, concretely relates to contain horizontal evaporation plant of salt waste water, can wide application in industry, chemical industry height contain salt waste water to and thermal power factory desulfurization technology waste water zero release processing system's evaporative concentration technology section.
Background
At present, an evaporation device for zero discharge treatment of industrial and chemical salt-containing wastewater and thermal power plant desulfurization process wastewater generally adopts forced circulation evaporation to solve the problem of material scaling, regardless of multi-effect evaporation or MVR evaporation process. During evaporation, hot steam is heated outside the pipe, and salt-containing wastewater is in the pipe. However, as evaporation proceeds, the wastewater forms scale on the pipe wall, and in severe cases, pipe blockage occurs.
The basic principle of forced circulation evaporation is as follows: the liquid is forced to circulate in the evaporator tube by means of an external force-a circulating pump, so that the solution forms a certain movement speed in the heating tube, and the phenomenon of pipe blockage caused by material scaling is overcome. However, a flushing action is easily created on the evaporation pipe.
Practice has shown that forced circulation evaporators have the following disadvantages: a large amount of electric energy is consumed; impurities in the waste water in the evaporation process have great abrasion to the pump blades rotating at high speed; the system has long pipeline and large heat dissipation loss, and the problem that the pipeline is difficult to clean due to the phenomenon of pipe blockage still occurs. Secondly, when the existing evaporation device works, a considerable amount of dilute solution to be concentrated and evaporated is filled in the shell of the evaporator, and the height of the static liquid level of the dilute solution is about 70-80% of the diameter of the shell. The defects of small evaporation contact surface of the dilute solution, slow evaporation process, low heat transfer coefficient and heat transfer rate, high heat required by evaporation and the like exist. Meanwhile, the evaporation space occupied by the liquid is large, and once the steam and the liquid level gradually tend to be balanced, the possibility of stopping the vaporization process exists. In addition, the existing evaporation device is slow in evaporation process, a heat source cannot well provide uniform, stable and sufficient heat energy, and a continuous vaporization process cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model aims to provide a novel horizontal evaporation plant for salt-containing wastewater, which can prevent scaling in the operation process, does not need any chemical cleaning and does not produce secondary pollution in the use process; the device has the advantages of high heat transfer rate, high heat efficiency, short evaporation time and less heat source consumption, and can effectively reduce the running cost of the evaporator.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: contain horizontal evaporation plant of salt waste water includes:
the steam generator comprises a horizontally-mounted evaporator shell, wherein a hollow shaft penetrates through the evaporator shell, one end of the hollow shaft is connected with a driving device, the other end of the hollow shaft is provided with a steam inlet, an annular rotating blade is sleeved on the hollow shaft, the annular rotating blade is of an internal hollow structure and is communicated with the hollow shaft, and a plurality of steam holes are formed in the hollow shaft; an air outlet is formed in the upper part of the evaporator shell, and a concentrated solution discharge outlet is formed in the bottom of the evaporator shell;
and the salt-containing wastewater enters the interior of the evaporator shell through the water inlet distribution device.
According to a preferable technical scheme, the water inlet distribution device comprises a water inlet distribution pipe, the water inlet distribution pipe is divided into a water injection branch pipe and a water distribution branch pipe, the water injection branch pipe is communicated with the inner part of the shell of the evaporator, and a water injection control valve is installed on the water injection branch pipe; at least partial pipe sections of the water distribution branch pipes are arranged in the evaporator shell and are provided with a plurality of atomizing nozzles, and partial pipe sections of the water distribution branch pipes are arranged outside the evaporator shell and are provided with water distribution control valves.
Preferably, the water filling control valve and the water distribution control valve are both electrically operated valves.
As a preferable technical scheme, rake type vibration scrapers are respectively arranged between the annular rotating blades and the evaporator shell and between two adjacent annular rotating blades, the rake type vibration scrapers are fixed at the bottom inside the evaporator shell, and vibration motors are mounted on the rake type vibration scrapers.
Preferably, the surface of the rake type vibrating scraper is provided with a soft metal wire in a protruding manner.
As a preferable technical scheme, a water outlet is further formed in one side of the hollow shaft.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has at least:
(1) the unique water inlet distribution device effectively avoids the integral violent vibration of the evaporator caused by the intense heat or water shock when the heat source is introduced. The dilute solution can be atomized instantly through the spiral nozzle, the surface area of the atomized dilute solution is larger, the dilute solution is easier to vaporize, the evaporation time of the dilute solution can be shortened, the heat transfer rate is improved, the heat efficiency is improved, the steam heat required by evaporation is reduced, and the operation cost of the evaporator is reduced. Meanwhile, the space occupied by the liquid is reduced, the steam space is increased, and the time that the original steam and the liquid level gradually tend to be balanced is prolonged, so that the vaporization process is continuously carried out, and the process innovation is realized.
(2) Steam evenly diffuses to the inside of the horizontal evaporator shell, the outer surfaces of the whole evaporator shell and the annular rotating blades are quickly and evenly heated to raise the temperature, a heat source in the inner space of the evaporator, the heated outer surfaces of the evaporator shell and the annular rotating blades are completely, fully and effectively contacted with the atomized dilute solution and quickly enter the evaporation heat exchange process, the whole evaporation process has no heat loss, uniform, stable and sufficient heat energy is continuously provided for the dilute solution, and continuous vaporization is maintained.
(3) The hollow shaft with holes and the annular rotating blades are internally communicated with a heat source, the outside of the hollow shaft with holes is contacted with the dilute solution, the outer surface of the annular rotating blades and the dilute solution to be evaporated have certain relative movement to generate a washing effect, and the scaling phenomenon can be reduced. Meanwhile, a scraper is arranged between two adjacent annular rotating blades, soft metal wires with certain protruding heights are arranged on the surface of the scraper, the annular rotating blades and the scraper which is vibrated by the vibrating motor simultaneously form relative motion and contact under the rotation of the motor, dirt stuck on the blades is timely cleaned, the problem of scaling of a heat exchange surface is solved without adopting a high-power forced circulation pump, any chemical cleaning is not needed, and secondary pollution is not generated in the using process.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at I;
FIG. 3 is a schematic view of the construction of the atomizing nozzle;
fig. 4 is a schematic view of the structure in the direction of a-a in fig. 3.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
Examples
As shown in fig. 1 to 4, the horizontal evaporation device for salt-containing wastewater comprises an evaporator housing 100 and an inlet water distribution device 200, wherein the evaporator housing 100 is horizontally installed, and the salt-containing wastewater enters the inside of the evaporator housing 100 through the inlet water distribution device 200.
A hollow shaft 110 is installed in the evaporator shell 100 in a penetrating manner, one end of the hollow shaft 110 is connected with a driving device 120, the driving device 120 comprises a driving motor and a speed reducer and provides rotary power for the hollow shaft 110, the other end of the hollow shaft 110 is provided with a steam inlet 131 and a water outlet 132, and the steam inlet 131 and the water outlet 132 are integrated on the same end cover; the hollow shaft 110 is sleeved with an annular rotating paddle 140, the annular rotating paddle 140 is of an internal hollow structure, integrates a steam inlet and water discharge device, and is communicated with the hollow shaft 110 through a communication device, and the hollow shaft 110 is provided with a plurality of steam holes 111; the upper part of the evaporator shell 100 is provided with an exhaust port 150, and the bottom of the evaporator shell 100 is provided with a concentrated solution discharge port 160;
the water inlet distribution device 200 comprises a water inlet distribution pipe 210, the water inlet distribution pipe 210 is divided into a water injection branch pipe 220 and a water distribution branch pipe 230, the water injection branch pipe 220 is communicated with the inside of the evaporator shell 100, and a water injection control valve 240 is installed on the water injection branch pipe 220; at least part of the water distribution branch pipes 230 are arranged inside the evaporator shell 100 and are provided with a plurality of atomizing nozzles 250, and part of the water distribution branch pipes 230 are arranged outside the evaporator shell 100 and are provided with water distribution control valves 260. Referring to fig. 3 and 4, the atomizing nozzle 250 preferably adopts a spiral nozzle, and the heat absorption effect of the atomized dilute solution is better than that of the un-atomized liquid, mainly because the dilute solution has the same quality, the atomized dilute solution has a larger surface area and is easier to vaporize, the evaporation time of the dilute solution can be shortened, the heat transfer rate can be increased, the heat efficiency can be improved, and the steam heat required by evaporation can be reduced. Meanwhile, the space occupied by the liquid is reduced, the steam space is increased, and the time that the original steam and the liquid level gradually tend to be balanced is prolonged, so that the vaporization process is continuously carried out;
the water injection control valve 240 and the water distribution control valve 260 are electrically operated valves, and of course, pneumatic control valves may be used, which all belong to the protection scope of the present invention.
Rake type vibration scrapers 170 are respectively arranged between the annular rotating blades 140 and the evaporator shell 100 and between two adjacent annular rotating blades 140, the rake type vibration scrapers 170 are fixed at the bottom in the evaporator shell 100, and vibration motors 180 for providing vibration power for the rake type vibration scrapers 170 are installed on the rake type vibration scrapers 170. The surface of the rake vibratory screed 170 is provided with a soft wire having a certain protrusion height.
The working principle of the utility model is as follows: dilute solution (saline wastewater) enters from the top of the horizontal evaporator shell 100, passes through the water inlet distribution device 200, firstly opens the water injection control valve 240 of the water inlet distribution device, when the dilute solution is filled in the evaporator shell with the diameter of 20%, the water injection control valve 240 is automatically closed in an interlocking manner, meanwhile, the water distribution control valve 260 is opened, the dilute solution is instantly atomized through a spiral nozzle, and the atomized dilute solution is fully contacted with saturated steam and the heated annular rotating blades 140, so that rapid evaporation is realized. Meanwhile, the space occupied by liquid is reduced, and the steam space is increased. Steam holes with the diameter of phi 1.5mm are uniformly formed in the surface of the wall of the hollow shaft, and the steam not only fills the annular rotating blades 140 communicated with the hollow shaft 110 and the hollow shaft with holes, but also can uniformly diffuse the steam into the horizontal evaporator shell 100. The vapor from the evaporation of the dilute solution is collected through an exhaust port 150 provided at the top of the horizontal evaporator housing 100 into a condenser, and is recovered as condensed water through a cooler. The concentrated solution not vaporized is discharged and collected through the concentrated solution discharge port 160 provided at the bottom of the horizontal evaporator case 100. Saturated steam flows back and forth for multiple times in the hollow shaft with holes of the evaporator and the annular rotating blades, and the saturated water after heat release flows into the phase change heat exchanger from the water discharge port 132 for recycling.
The heat source is introduced into the hollow shaft 110 with holes and the annular rotating blades 140, the outside of the hollow shaft is contacted with the dilute solution, and the outer surface of the annular rotating blades 140 and the dilute solution to be evaporated have certain relative movement to generate a scrubbing effect. Meanwhile, a scraper is arranged between two adjacent annular rotating blades 140, soft metal wires with certain protrusion heights are arranged on the surface of the scraper, and the annular rotating blades and the scraper which is vibrated by the vibration motor form relative motion and contact under the rotation of the motor, so that scales adhered to the blades can be cleaned in time.
In conclusion, the device can prevent the scale formation in the operation process, does not need any chemical cleaning, and does not generate secondary pollution in the use process; the device has the advantages of high heat transfer rate, high heat efficiency, short evaporation time and less heat source consumption, and can effectively reduce the running cost of the evaporator.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (7)
1. Contain horizontal evaporation plant of salt waste water, its characterized in that includes:
the steam generator comprises a horizontally-mounted evaporator shell, wherein a hollow shaft penetrates through the evaporator shell, one end of the hollow shaft is connected with a driving device, the other end of the hollow shaft is provided with a steam inlet, an annular rotating blade is sleeved on the hollow shaft, the annular rotating blade is of an internal hollow structure and is communicated with the hollow shaft, and a plurality of steam holes are formed in the hollow shaft; an air outlet is formed in the upper part of the evaporator shell, and a concentrated solution discharge outlet is formed in the bottom of the evaporator shell;
and the salt-containing wastewater enters the interior of the evaporator shell through the water inlet distribution device.
2. The horizontal evaporation plant for salt-containing wastewater according to claim 1, wherein: the water inlet distribution device comprises a water inlet distribution pipe, the water inlet distribution pipe is divided into a water injection branch pipe and a water distribution branch pipe, the water injection branch pipe is communicated with the inner part of the shell of the evaporator, and a water injection control valve is arranged on the water injection branch pipe; at least partial pipe sections of the water distribution branch pipes are arranged in the evaporator shell and are provided with a plurality of atomizing nozzles, and partial pipe sections of the water distribution branch pipes are arranged outside the evaporator shell and are provided with water distribution control valves.
3. The horizontal evaporation plant for salt-containing wastewater according to claim 2, wherein: and the water injection control valve and the water distribution control valve are electrically operated valves.
4. The horizontal evaporation plant for salt-containing wastewater according to claim 2, wherein: the atomizing nozzle is a spiral nozzle.
5. The horizontal evaporation plant for salt-containing wastewater according to claim 1, wherein: the annular rotating blades and the evaporator shell as well as the two adjacent annular rotating blades are respectively provided with a rake type vibrating scraper which is fixed at the bottom inside the evaporator shell, and the rake type vibrating scraper is provided with a vibrating motor.
6. The horizontal evaporation plant for salt-containing wastewater as claimed in claim 5, wherein: and a soft metal wire is arranged on the surface of the rake type vibration scraper in a protruding mode.
7. The horizontal evaporation plant for salt-containing wastewater as claimed in any one of claims 1 to 6, wherein: and a water outlet is also formed in one side of the hollow shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022226673.2U CN213537331U (en) | 2020-10-09 | 2020-10-09 | Horizontal evaporation plant for salt-containing wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022226673.2U CN213537331U (en) | 2020-10-09 | 2020-10-09 | Horizontal evaporation plant for salt-containing wastewater |
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| CN213537331U true CN213537331U (en) | 2021-06-25 |
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| CN202022226673.2U Active CN213537331U (en) | 2020-10-09 | 2020-10-09 | Horizontal evaporation plant for salt-containing wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114590857A (en) * | 2022-04-29 | 2022-06-07 | 江苏汉盛海洋装备技术有限公司 | Integrated marine seawater desalination device |
| CN115183534A (en) * | 2022-06-23 | 2022-10-14 | 华能国际电力股份有限公司大连电厂 | Hollow blade type drying machine |
-
2020
- 2020-10-09 CN CN202022226673.2U patent/CN213537331U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114590857A (en) * | 2022-04-29 | 2022-06-07 | 江苏汉盛海洋装备技术有限公司 | Integrated marine seawater desalination device |
| CN115183534A (en) * | 2022-06-23 | 2022-10-14 | 华能国际电力股份有限公司大连电厂 | Hollow blade type drying machine |
| CN115183534B (en) * | 2022-06-23 | 2024-04-19 | 华能国际电力股份有限公司大连电厂 | Hollow blade type desiccator |
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