CN213771408U - Intermittent type formula electricity heating liquid sprays evaporation plant - Google Patents
Intermittent type formula electricity heating liquid sprays evaporation plant Download PDFInfo
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Abstract
The application discloses an intermittent type electric heating liquid spraying evaporation device, which belongs to the field of chemical industry and comprises a liquid inlet pipe, a spraying pipe, an evaporation chamber, a condensation unit, a conveying device, a heat accumulator, a cleaning device, a solid dry matter collecting device and a heating device, wherein the liquid inlet pipe is used for inputting liquid to be treated; the spraying pipe is provided with a plurality of spray heads which are positioned in the evaporation chamber, the liquid inlet pipe is connected with the spraying pipe, and the liquid to be treated can be sprayed in the evaporation chamber after sequentially passing through the liquid inlet pipe and the spraying pipe; the condensation unit comprises a built-in condensation water collector, a condensation liquid collecting groove, a steam collecting pipe, an external condenser and a condensation water collector, wherein the condensation liquid collecting groove is arranged in the evaporation chamber. The application can quickly realize the evaporation, separation and purification of the mixed liquid. Meanwhile, based on the integral improvement, the method effectively solves the problems of easy blockage and scaling of the equipment, can continuously, stably and reliably operate for a long time, and meets the requirement of industrial treatment.
Description
Technical Field
The application relates to the field of chemical industry, in particular to an intermittent type electric heating liquid spraying and evaporating device. By adopting the method and the device, the solid-liquid separation in the liquid to be treated can be realized, the operation is stable and reliable, the requirement of industrial application can be met, the prospect of large-scale production and application is achieved, and the application value is very high.
Background
Environmental problems become important problems restricting the development of socio-economy in China, and are also important problems of global common attention. In the wastewater treatment process, the wastewater is purified by adopting a membrane concentration mode. The process produces a concentrate as well as purified water and membrane concentration. The concentrated solution generated by membrane concentration is a difficult problem which is always concerned and needs to be solved urgently in the industry, and particularly, the concentrated solution generated in the membrane concentration process of industrial wastewater, especially high-concentration and difficult-degradation industrial wastewater (such as electroplating wastewater, printing and dyeing wastewater, pharmaceutical wastewater and the like) is more difficult to treat. In addition, the treatment of leachate generated by domestic garbage landfill and leachate generated by a temporary storage tank of domestic garbage incineration plant garbage is a difficult problem which is troubled for the industry for a long time.
Aiming at the problems, the traditional method mainly adopts modes of multi-stage steam flash evaporation, mechanical vapor recompression (MVR for short), supercritical and the like, although the method is efficient and energy-saving, the problems of corrosion, blockage, scaling and the like of a system are easy to occur, and the method becomes the restriction and bottleneck of technical development and application.
In recent years, the submerged combustion technology is applied to landfill leachate treatment, and a good effect is achieved. The submerged combustion evaporation takes natural gas or landfill gas as raw materials, provides energy required by liquid evaporation through direct combustion, but has high energy consumption, and partial undecomposed pollutants are still remained in evaporation condensate water, and further control and treatment are required.
To this end, the present application provides a new method and/or apparatus to solve the above-mentioned problems.
Disclosure of Invention
The invention of the present application aims to: in view of the above-mentioned existing problems, provide an intermittent type electric heating liquid spray evaporation device. The application relates to evaporation treatment of concentrated solution, in particular to a method and a device for evaporating landfill leachate, wastewater membrane treatment concentrated solution and the like to realize solid-liquid separation. By adopting the method and the device, the evaporation, separation and purification of the mixed liquid can be rapidly realized. Meanwhile, based on the integral improvement, the method effectively solves the problems of easy blockage and scaling of the equipment, can continuously, stably and reliably operate for a long time, and meets the requirement of industrial treatment. The inventor searches in the early period and finds that the prior art discloses no similar method and/or product, and the application has higher originality and breakthrough.
In order to achieve the purpose, the invention adopts the following technical scheme:
an intermittent electrically heated liquid spray evaporation method comprises the following steps:
(1) the heat accumulator is heated to a set temperature by a heating device, and the heated heat accumulator is conveyed to the lower part of a spray pipe of the evaporation chamber by a conveying device; the liquid sprayed out of the spray pipe falls on the heated heat accumulator, and under the heating action of the heat accumulator, the water in the liquid is evaporated and forms attachments on the heat accumulator;
(2) the liquid to be treated is sprayed downwards through a spray pipe above the evaporation chamber and falls on the heated heat accumulator; condensing the water vapor in the evaporation chamber, and then collecting or discharging the water vapor;
(3) after the amount of attachments on the heat accumulator reaches a set value, the heat accumulator containing the attachments is sent out through the conveying device, and the heated heat accumulator is sent to the lower part of a spray pipe of the evaporation chamber through the conveying device for next spray evaporation;
(4) after the delivered heat accumulator containing the attachments is cleaned by the cleaning device, the attachments on the heat accumulator are separated from the heat accumulator, and the cleaned heat accumulator returns to the heating device for heating;
(5) and (5) repeating the steps (1) to (4) until the spray evaporation is complete.
The method is used in the treatment of liquids.
The method is used for evaporation, solid-liquid separation and purification of liquid.
The liquid to be treated is one or more of refractory industrial wastewater, landfill leachate, waste incineration leachate, oil-water mixture and saline water mixture.
The liquid to be treated is one of industrial wastewater or concentrated solution containing refractory organic matters.
The liquid to be treated is a concentrated liquid generated by membrane concentration.
The heat accumulator adopts a heat accumulator with large specific surface area, high heat capacity, corrosion resistance and thermal shock resistance.
In the step 1, the spraying pipe sprays the liquid to be treated to the surface of the heated heat accumulator in a pulse intermittent mode.
In the step 1, the heat accumulator is heated by a heating device to a temperature below the decomposition temperature of the organic matters in the liquid to be treated.
In the step 1, the heat accumulator is heated to 150-350 ℃ by a heating device.
The continuous operation of the spraying and evaporating process is realized by controlling the temperature of the heated heat accumulator, the gas discharge speed of the evaporating chamber and the water condensation speed in the evaporating chamber.
An intermittent electric heating liquid spraying evaporation device comprises a liquid inlet pipe for inputting liquid to be treated, a spraying pipe, an evaporation chamber, a condensation unit, a conveying device, a heat accumulator, a cleaning device, a solid dry matter collecting device and a heating device;
the spraying pipe is provided with a plurality of spray heads which are positioned in the evaporation chamber, the liquid inlet pipe is connected with the spraying pipe, and the liquid to be treated can be sprayed in the evaporation chamber after sequentially passing through the liquid inlet pipe and the spraying pipe;
the condensation unit comprises an internal condensation water collector, a condensation liquid collecting groove, a steam collecting pipe, an external condenser and a condensation water collector, wherein the condensation liquid collecting groove is arranged in the evaporation chamber, steam in the evaporation chamber can be condensed for the first time through the internal condensation water collector, the internal condensation water collector is connected with the condensation liquid collecting groove, condensed water collected on the internal condensation water collector can be discharged through the condensation liquid collecting groove, the evaporation chamber is connected with the external condenser through the steam collecting pipe, gas in the evaporation chamber can enter the external condenser through the steam collecting pipe for secondary condensation, the condensation liquid collecting groove and the external condenser are respectively connected with the condensation water collector, and condensed water collected by the internal condensation water collector and condensed water collected by the external condenser can respectively enter the condensation water collector;
the conveying device is arranged below the spray pipe, the heat accumulator is positioned on the conveying device, liquid sprayed out of the spray pipe can be sprayed onto the heat accumulator of the conveying device, attachments are formed on the heat accumulator, the cleaning device is connected with the conveying device and can clean the heat accumulator containing the attachments on the conveying device and separate the heat accumulator from the attachments on the heat accumulator, the solid dried matter collecting device is connected with the cleaning device and can collect the attachments separated by the cleaning device, and the heating device is respectively connected with the cleaning device and the conveying device, can heat the heat accumulator after the attachments are removed by the cleaning device, and can return to the conveying device.
The conveying device is a mesh belt conveyor, the cleaning device is positioned at the output end of the mesh belt conveyor and can clean the heat accumulator output by the mesh belt conveyor so as to separate attachments on the heat accumulator from the heat accumulator.
And the mesh belt on the mesh belt conveyor is prepared from a metal material.
The conveying device is a rotary table conveyor, the rotary table conveyor is located below the evaporation chamber, the heat storage bodies heated by the heating device can be conveyed to the rotary table conveyor, and the cleaning device can clean the heat storage bodies attached with attachments on the rotary table conveyor.
The cleaning device is a vibrating screen which can separate the heat accumulator from attachments on the heat accumulator through vibration;
or the cleaning device is a brush type cleaning device.
The vibrating screen is a linear vibrating screen.
The heating device is one or more of a motor heating device and a gas heating device.
The heating device is one or more of a tunnel type infrared heating device, a tunnel type microwave heating device, a tunnel tube type infrared heating device and a tunnel tube type microwave heating device.
The device further comprises a control system, and the control system is respectively connected with the conveying device, the heating device and the cleaning device.
The angle adjusting device is connected with the spray pipe and can change the angle of the spray pipe.
The spraying device is characterized by further comprising a liquid inlet pump, wherein the liquid inlet pump is arranged on the spraying pipe and can provide power for liquid in the liquid inlet pipe and adjust the spraying speed of the spraying pipe, and the liquid inlet pump is connected with the control system.
The device also comprises a temporary storage tank for storing the liquid to be treated, and the temporary storage tank is connected with the liquid inlet pipe.
Still include the condensate pump, the condensate pump sets up on the steam collecting pipe and the condensate pump provides power for the gas flow in the steam collecting pipe, the condensate pump links to each other with control system.
In view of the foregoing problems, the present application provides an intermittent spray evaporation method for an electrically heated liquid, a device and applications thereof. At present, there is no homogeneous or similar solution.
Chinese patent application CN201611004575.6 discloses a low-temperature spray evaporation desulfurization wastewater treatment system, the working principle of which is: air enters the concentrated liquid containing section through the blower and flows from bottom to top in the tower. The concentrated liquid containing section desulfurization wastewater is lifted to the spraying evaporation section through the circulating pump. In order to prevent the scaling and corrosion of the pipeline, a polarization device is arranged. In the circulating process, the desulfurization waste water is heated to 40-100 ℃ by a heater, and the heated desulfurization waste water is atomized and sprayed by a spraying device in a spraying evaporation section and finally falls back to a concentrated liquid containing section. The desulfurization waste water sprayed by downward atomization and the air flowing upwards are uniformly mixed in a reverse direction, the desulfurization waste water is evaporated and carried by the air, and the air reaches a saturated state at the temperature. The air can carry large-particle-size liquid drops, enters the high-efficiency demister, and the saturated wet air purified by the high-efficiency demister finally enters the desulfurizing tower. After the operation for a period of time, the concentrated liquid containing section can be continuously concentrated to generate crystals and solid precipitates, and the crystals and the solid precipitates are discharged to a sludge treatment system for continuous treatment.
Chinese patent application CN201910614436.2 discloses a waste water evaporation concentration system and process based on low temperature spray desulfurization, the process includes the following steps: (1) the desulfurization wastewater enters an evaporation tower through a buffer tank; (2) heating the desulfurization waste water clear liquid in the clear liquid area of the evaporation tower to 40-100 ℃ through a heat exchanger, and uniformly spraying the desulfurization waste water clear liquid to the spray area of the evaporation tower through an atomization spray device; (3) in the process that the clear liquid of the desulfurization waste water in the spraying area falls back to the bottom of the evaporation tower under the action of gravity, the clear liquid and low-temperature saturated wet air entering from the lower part of the evaporation tower are uniformly mixed in a reverse direction to generate heat exchange, partial water is evaporated and carried by the air, and the low-temperature saturated wet air is changed into high-temperature saturated wet air; (4) the high-temperature saturated wet air enters an air condenser and is cooled again by circulating cooling water to be low-temperature saturated wet air, and the carried moisture can be separated out in a condensed water form and can be used as water for factory desulfurization and other processes; (5) the circulating cooling water with the increased temperature enters a mechanical ventilation cooling tower for forced ventilation cooling; (6) with the continuous separation of the condensed water, the concentration of the desulfurization wastewater is continuously increased, and the concentrated desulfurization wastewater enters other subsequent treatment systems; (7) and in the system starting stage, the air feeder extracts ambient air and sends the ambient air to the lower part of the evaporation tower, and after the system normally operates, the air is used as a water carrying carrier to carry out a closed circulation state and is continuously changed between a low-temperature saturated state and a high-temperature saturated state.
For those skilled in the art, spray evaporation is a common technical means in the chemical field, and is more commonly used in evaporative condensers, and is followed by a concentration means as a liquid (for example, chinese patent application CN201910614436.2), and few means relate to concentration crystallization (for example, chinese patent application CN 201611004575.6). It is known that when the solution is continuously heated, three stages of solution concentration, solution crystallization and solid precipitation are sequentially realized. In the prior art, solid precipitation is one of main reasons for scaling and blockage of the inner wall of equipment, the normal use and the service life of the equipment are greatly influenced, and the solid precipitation is required to be avoided, which is also a root cause that evaporation spraying is adopted in the prior art and most of the solid precipitation can be prepared into concentrated solution. In order to solve the technical problem, no feasible solution exists in the prior art.
The method aims to solve the problems of corrosion, blockage, scaling and the like when the generated concentrated solution is subjected to evaporation treatment in the traditional industrial wastewater treatment and resource utilization process, particularly in the treatment and resource utilization process of high-concentration and difficult-degradation industrial wastewater (such as electroplating, printing and dyeing, pharmaceutical wastewater and the like). In the application, a heat accumulator with large specific surface area, high heat capacity, corrosion resistance and thermal shock resistance is adopted, continuous high temperature (the heating temperature is preferably 150-350 ℃) and required energy are provided for the heat accumulator, then liquid to be treated is directly sprayed on the surface of the heated heat accumulator in a pulse intermittent mode (the frequency is controllable), water vapor generated by evaporation is subjected to condensation treatment through a condensation unit, and attachments are formed on the surface of the heat accumulator; and then, outputting the heat accumulator with the attachments through a conveying device, cleaning the heat accumulator by a cleaning device to separate the heat accumulator from the attachments on the heat accumulator, returning the separated heat accumulator to the heating device for heating, and then sending the heat accumulator into the evaporation chamber for next spraying evaporation treatment. In this application to the heat accumulator after the heating is the carrier, and pending liquid and the diapire of evaporating chamber do not take place the contact, therefore effectively solved the problem of evaporating chamber inner wall scale deposit, jam. Meanwhile, the concentrated solution is used as a processing object, so that the problem of the chemical industry is effectively solved.
In this application, through control heat accumulator surface temperature, steam get rid of with parameters such as condensation rate, vaporization system pressure, can realize that continuation, high efficiency of evaporation process go on. Preferably, the infrared (or microwave) heat accumulator is heated by adopting a tunnel (tunnel tube) type, so that the temperature of the heat accumulator can be balanced, stable and controllable. Meanwhile, the condensation of gas in the evaporation chamber can be realized through the built-in condensation water collector and the external condenser, and the condensation efficiency is improved. And through cleaning device, can realize quick, in time peeling off of attachment on the heat accumulator, effectively guarantee the heat accumulator heat accumulation, improve heat exchange efficiency. Meanwhile, the heating temperature of the heat accumulator is controlled, so that the temperature of the surface of the heat accumulator is controlled below the decomposition temperature of organic matters in industrial wastewater, the generated gas is effectively ensured not to contain VOCs, and the treatment difficulty of tail gas is greatly reduced.
The application can be used for treating the concentrated solution generated by the concentration of garbage leachate, industrial wastewater and membranes, and can also be used for evaporating, separating and purifying the mixed solution. Furthermore, the device can be used for solid-liquid separation of oil-water mixtures and saline water mixtures, and has wide application prospects. The device has the advantages of ingenious design, reasonable design, convenience in operation, no scaling or blockage, capability of continuously, stably and reliably running and remarkable progress significance.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of an intermittent electrically heated liquid spray evaporation device.
The labels in the figure are: 1. the device comprises a temporary storage pool, 2, a liquid inlet pipe, 3, a spray pipe, 4, an evaporation chamber, 5, a built-in condensation water collector, 6, a cleaning device, 7, a solid dry matter collecting device, 8, a heating device, 9, a heat accumulator, 10, an external condenser, 11 and a condensation water collector.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The intermittent type formula electrical heating liquid spray evaporation device of this embodiment is including the pond of keeping in that is used for depositing pending liquid, feed liquor pump, feed liquor pipe, shower, evaporating chamber, condensing unit, conveyor, heat accumulator, cleaning device, solid drying thing collection device, heating device, control system.
The temporary storage pool is connected with a liquid inlet pipe, and a liquid inlet pump is arranged on the liquid inlet pipe; the flow of the liquid to be treated in the liquid inlet pipe can be controlled by adjusting the flow speed of the liquid inlet pump. Meanwhile, a plurality of spray heads are arranged on the spray pipe, the spray heads are positioned in the evaporation chamber, and the liquid inlet pipe is connected with the spray pipe. The condensation unit comprises a built-in condensation water collector, a condensation liquid collecting groove, a steam collecting pipe, an external condenser and a condensate water collector, the condensation liquid collecting groove is arranged in the evaporation chamber, the built-in condensation water collector is connected with the condensation liquid collecting groove, the evaporation chamber is connected with the external condenser through the steam collecting pipe, and the condensation liquid collecting groove and the external condenser are respectively connected with the condensate water collector. The conveying device is arranged below the spraying pipe, the heat accumulator is located on the conveying device, the cleaning device is connected with the conveying device, the solid dry matter collecting device is connected with the cleaning device, and the heating device is respectively connected with the cleaning device and the conveying device. Meanwhile, the control system is respectively connected with the liquid inlet pump, the conveying device, the heating device and the cleaning device.
In the device, liquid to be treated is placed in a temporary storage tank; the liquid to be treated is sent into the spray pipe through the liquid inlet pipe and is sprayed out through a spray head on the spray pipe; the spray pipe of the embodiment is provided with micropores, and the liquid to be treated is uniformly sprayed out in a spray shape through the micropores on the spray pipe, so that the evaporation efficiency is greatly improved; the spray heads (i.e., the micropores) on the spray pipes are positioned in the evaporation chamber, so that the liquid to be treated can be sprayed in the evaporation chamber. Meanwhile, the liquid sprayed out of the spray pipe can be sprayed onto the heat accumulator of the conveying device, and attachments are formed on the heat accumulator; the cleaning device can be used for cleaning the heat accumulator containing attachments on the conveying device and separating the heat accumulator from the attachments on the heat accumulator, and the solid dry matter collecting device is used for collecting the attachments separated by the cleaning device; the heat accumulator with the attachments removed by the cleaning device is heated by the heating device and then returns to the conveying device for next spraying and evaporation. When liquid sprayed out of the spray pipe contacts with a heat accumulator on the conveying device, evaporation drying effect is generated, steam in the liquid is condensed for the first time through the built-in condensation water collector, and condensed water collected on the built-in condensation water collector is discharged through the condensation liquid collecting groove; gas in the evaporation chamber enters an external condenser through a steam collecting pipe to be secondarily condensed; then, condensed water collected by the built-in condensation water collector and condensed water collected by the external condenser can respectively enter the condensed water collector.
Further, the conveying device of the embodiment may be a mesh belt conveyor, a mesh belt on the mesh belt conveyor is made of a metal material, and the cleaning device is located at an output end of the mesh belt conveyor; the cleaning device is a linear vibrating screen; the heating device can be an electric motor heating device or a gas heating device. The movable sieve can separate the heat accumulator from attachments on the heat accumulator through vibration.
Preferably, the heating device is a tunnel-type infrared heating device, a tunnel-type microwave heating device, a tunnel-tube-type infrared heating device or a tunnel-tube-type microwave heating device, which is beneficial to realizing the temperature balance, stability and controllability of the heat accumulator. The heat accumulator preferably has a large specific surface area, a high heat capacity, corrosion resistance and thermal shock resistance. The sweeping device preferably adopts a brush sweeping type ash residue cleaning and storing mode, which is favorable for realizing quick and timely stripping of attachments on the heat accumulator, effectively ensures heat accumulation of the heat accumulator and improves heat exchange efficiency.
As an alternative, the conveying device of this embodiment may be a rotary table conveyor, the rotary table conveyor is located below the evaporation chamber, and the heat storage body heated by the heating device can be conveyed onto the rotary table conveyor. Furthermore, the device of the embodiment also comprises a condensation pump, wherein the condensation pump is arranged on the steam collecting pipe and is connected with the control system; in this configuration, the condensate pump is used to power the gas flow within the vapor collection tube and to regulate the vapor removal and condensation rates. Preferably, the embodiment further comprises an angle adjusting device, and the angle adjusting device is connected with the spray pipe; in the structure, the angle adjusting device is used for changing the angle of the spray pipe, and is favorable for realizing variable-angle intermittent flow-controllable liquid distribution.
Example 1
In this example, the liquid to be treated was high-salt wastewater after membrane treatment in the coal chemical industry, and the main components thereof were sodium chloride, sodium sulfate and organic matter, and the total salt content was 6.8 × 104mg/L, TOC (Total organic carbon) 1.1X 104mg/L。
In this embodiment, the spray evaporation of the liquid to be treated is as follows.
(1) The heat accumulator is heated to 165 ℃ by a heating device, and the heated heat accumulator is conveyed to the lower part of a spray pipe of the evaporation chamber by a conveying device. The liquid sprayed from the spray pipe falls on the heated heat accumulator, and under the heating action of the heat accumulator, the water in the liquid evaporates and forms attachments on the heat accumulator. The heat accumulator is formed by arranging two components, namely a titanium plate with the thickness of 1-1.5 mm and a positioning plate.
(2) The liquid to be treated is sprayed downwards through a spray pipe above the evaporation chamber and falls on the heated heat accumulator. And condensing the water vapor in the evaporation chamber, and then collecting or discharging the water vapor.
(3) And after the amount of attachments on the heat accumulator reaches a set value, sending out the heat accumulator containing the attachments through the conveying device, and sending the heated heat accumulator to the lower part of the spray pipe of the evaporation chamber through the conveying device for next spray evaporation.
(4) After the delivered heat accumulator containing the attachments is cleaned by the cleaning device, the attachments on the heat accumulator are separated from the heat accumulator, and the cleaned heat accumulator returns to the heating device for heating.
(5) And (5) repeating the steps (1) to (4) until the spray evaporation is complete. In this example, a batch was processed every 4 hours.
And (3) detecting the gas discharged from the evaporation chamber after the gas is treated by the VOC treatment device, wherein the index of the gas meets the corresponding emission standard.
Meanwhile, the collected attachments were measured, and the measurement results were as follows: 74.4% of sodium chloride, 25.3% of sodium sulfate and 0.3% of TOC.
Example 2
In this example, the liquid to be treated is leachate after the landfill is sealed, and the components thereof are shown in table 1 below.
TABLE 1 leachate after landfill closure
| Serial number | Name (R) | Unit of | Numerical value |
| 1 | Biochemical oxygen demand | (mg/L) | 7315 |
| 2 | Chemical Oxygen Demand (COD) | (mg/L) | 9970 |
| 3 | Total phosphorus | (mg/L) | 4.95 |
| 4 | Total nitrogen | (mg/L) | 2976.25 |
| 5 | Fecal coliform group | (per L) | ≥24000 |
| 6 | Ammonia nitrogen | (mg/L) | 2562.75 |
| 7 | Chloride ion | (mg/L) | 12488.43 |
| 8 | Sulfate radical | (mg/L) | 238.82 |
| 9 | Calcium carbonate | (mg/L) | 121.76 |
| 10 | Magnesium alloy | (mg/L) | 462.18 |
| 11 | Total alkalinity | (mg/L) | 11251.84 |
| 12 | Carbonate salt | (mg/L) | 1944.44 |
| 13 | Bicarbonate salt | (mg/L) | 9307.40 |
| 14 | pH value | Dimensionless | 8.46 |
| 15 | Nitrate radical | (mg/L) | 161.93 |
| 16 | Suspended matter | (mg/L) | 720 |
| 17 | Silicon dioxide | (mg/L) | With interference |
| 18 | Iron | (mg/L) | 43.14 |
| 19 | Total salt content | (mg/L) | 31115 |
In the step 1, the heat accumulator is heated to 175 ℃ by a heating device, and the heat accumulator is made of the following materials: 2205. meanwhile, in step 5, a batch of processing is performed every 3 hours. The rest is the same as in example 1.
And (3) after the gas discharged from the evaporation chamber is treated by the VOC treatment device, detecting, wherein the index of the gas meets the corresponding emission standard.
The condensate was measured and the results are shown in table 2.
TABLE 2 test results
| Serial number | Controlling contaminants | Emission concentration limit pollutants |
| 1 | Chroma (dilution multiple) | 25 |
| 2 | Chemical oxygen demand (CODCr) (mg/L) | 67 |
| 3 | Biochemical oxygen demand (BOD5) (mg/L) | 23 |
| 4 | Suspended substance (mg/L) | 16 |
| 5 | Total nitrogen (mg/L) | 15 |
| 6 | Ammonia nitrogen (mg/L) | 10 |
| 7 | Total phosphorus (mg/L) | 1.5 |
| 8 | Faecal coliform count (number/L) | 4200 |
| 9 | Total mercury (mg/L) | 0.0005 |
| 10 | Total cadmium (mg/L) | 0.003 |
| 11 | Total chromium (mg/L) | 0.05 |
| 12 | Hexavalent chromium (mg/L) | 0.01 |
| 13 | Total arsenic (mg/L) | 0.05 |
| 14 | Total lead (mg/L) | 0.05 |
The measurement result shows that the condensate generated by the system meets the requirements of the pollution control standard of the household garbage landfill GB16889-2008 on the discharge limit of the table III.
Meanwhile, the collected attachments are measured, and the main components of the attachments are as follows (the unit is mass percent): 60.9 percent of sodium chloride, 3.4 percent of magnesium carbonate, 0.7 percent of calcium carbonate, 32.2 percent of sodium carbonate, 0.3 percent of TOC and the other 2.5 percent.
Example 3
In this embodiment, the liquid to be treated is a leachate DTRO concentrate. The composition is shown in table 3.
TABLE 3 leachate physicochemical Properties
| pH | CDDcr mg/L | BOD5 mg/L | NH3-N mg/L | SS mg/L | Electrical conductivity of |
| 6-9 | ≤15000 | ≤4500 | ≤7000 | ≤3000 | ≤100000 |
In the step 1, the heat accumulator is heated to 160 ℃ by a heating device, and the heat accumulator is made of 2205 stainless steel. Meanwhile, in step 5, a batch of processing is performed every 2.5 hours. The rest is the same as in example 1.
And (3) after the gas discharged from the evaporation chamber is treated by the VOC treatment device, detecting, wherein the index of the gas meets the corresponding emission standard.
The condensate was tested and the results were as follows: COD less than or equal to 1500mg/L, BOD5Less than or equal to 450mg/L, less than or equal to 300mg/L of ammonia nitrogen, less than or equal to 2000mg/L of conductivity, and the removal rate of COD, BOD and ammonia nitrogen reaches more than 90%.
Meanwhile, the collected attachments are measured, and the main components of the attachments are as follows (the unit is mass percent): 85.3% of sodium chloride, 10.4% of sodium sulfate, 2.3% of TOC and 2% of others.
Example 4
In this embodiment, the liquid to be treated is medical wastewater, with TDS of 56000mg/L and COD of 12000 mg/L. In the step 1, the heat accumulator is heated to 180 ℃ by a heating device, and the heat accumulator is made of titanium. Meanwhile, in step 5, a batch of processing is performed every 1.5 hours. The rest is the same as in example 1.
And (3) after the gas discharged from the evaporation chamber is treated by the VOC treatment device, detecting, wherein the index of the gas meets the corresponding emission standard.
Meanwhile, the collected attachments are measured, and the main components of the attachments are as follows (the unit is mass percent): 71.4% of sodium chloride, 11.6% of sodium sulfate, 16.5% of TOC and 0.5% of the rest.
Example 5
In this example, the liquid to be treated was a plating bath waste liquid, the total dissolved solids of which were 11.3% and the COD of which was 1.8%. In the step 1, the heat accumulator is heated to 145 ℃ by a heating device, and the heat accumulator adopts Ti-0.8Ni-0.3Mo alloy. Meanwhile, in step 5, a batch of processing is performed every 2 hours. The rest is the same as in example 1.
And (3) after the gas discharged from the evaporation chamber is treated by the VOC treatment device, detecting, wherein the index of the gas meets the corresponding emission standard.
The condensate is detected, and the result is as follows: COD is less than or equal to 950, ammonia nitrogen is less than or equal to 120, and conductivity is less than or equal to 2000.
Meanwhile, the collected attachments are detected, mainly sodium chloride, heavy metal salts such as copper, lead and nickel and organic matters are taken as hazardous wastes to be delivered.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. An intermittent electric heating liquid spraying evaporation device is characterized by comprising a liquid inlet pipe, a spraying pipe, an evaporation chamber, a condensation unit, a conveying device, a heat accumulator, a cleaning device, a solid dry matter collecting device and a heating device, wherein the liquid inlet pipe is used for inputting liquid to be treated;
the spraying pipe is provided with a plurality of spray heads which are positioned in the evaporation chamber, the liquid inlet pipe is connected with the spraying pipe, and the liquid to be treated can be sprayed in the evaporation chamber after sequentially passing through the liquid inlet pipe and the spraying pipe;
the condensation unit comprises an internal condensation water collector, a condensation liquid collecting groove, a steam collecting pipe, an external condenser and a condensation water collector, wherein the condensation liquid collecting groove is arranged in the evaporation chamber, steam in the evaporation chamber can be condensed for the first time through the internal condensation water collector, the internal condensation water collector is connected with the condensation liquid collecting groove, condensed water collected on the internal condensation water collector can be discharged through the condensation liquid collecting groove, the evaporation chamber is connected with the external condenser through the steam collecting pipe, gas in the evaporation chamber can enter the external condenser through the steam collecting pipe for secondary condensation, the condensation liquid collecting groove and the external condenser are respectively connected with the condensation water collector, and condensed water collected by the internal condensation water collector and condensed water collected by the external condenser can respectively enter the condensation water collector;
the conveying device is arranged below the spray pipe, the heat accumulator is positioned on the conveying device, liquid sprayed out of the spray pipe can be sprayed onto the heat accumulator of the conveying device, attachments are formed on the heat accumulator, the cleaning device is connected with the conveying device and can clean the heat accumulator containing the attachments on the conveying device and separate the heat accumulator from the attachments on the heat accumulator, the solid dried matter collecting device is connected with the cleaning device and can collect the attachments separated by the cleaning device, and the heating device is respectively connected with the cleaning device and the conveying device, can heat the heat accumulator after the attachments are removed by the cleaning device, and can return to the conveying device.
2. The device of claim 1, wherein the conveying device is a mesh belt conveyor, the cleaning device is positioned at the output end of the mesh belt conveyor and can clean the heat accumulator output by the mesh belt conveyor to separate the attached matters on the heat accumulator from the heat accumulator.
3. The apparatus according to claim 1, wherein the conveyor is a carousel conveyor located below the evaporation chamber, the heat-accumulated body heated by the heating device is conveyed onto the carousel conveyor, and the cleaning device is configured to clean the heat-accumulated body having the deposit adhered to the carousel conveyor.
4. The apparatus according to claim 1, wherein the cleaning device is a vibrating screen and the vibrating screen separates the heat storage body from the attachments on the heat storage body by vibration energy;
or the cleaning device is a brush type cleaning device.
5. The apparatus of claim 1, wherein the heating device is one or more of an electric motor heating device, a gas heating device.
6. The apparatus of claim 1, further comprising an angle adjustment device coupled to the shower and capable of changing an angle of the shower.
7. The device according to any one of claims 1 to 6, further comprising a control system, wherein the control system is respectively connected with the conveying device, the heating device and the cleaning device.
8. The apparatus of claim 7, further comprising a fluid pump disposed on the spray pipe and capable of powering the liquid in the fluid pipe and adjusting the spray rate of the spray pipe, the fluid pump being connected to the control system.
9. The apparatus of claim 7, further comprising a buffer tank for storing the liquid to be treated, the buffer tank being connected to the liquid inlet pipe.
10. The apparatus of claim 9, further comprising a condensate pump disposed on the vapor collection tube and powering the flow of gas within the vapor collection tube, the condensate pump being connected to the control system.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113697886A (en) * | 2021-09-15 | 2021-11-26 | 中国海洋大学 | Solar energy distillation sea water desalination device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113697886A (en) * | 2021-09-15 | 2021-11-26 | 中国海洋大学 | Solar energy distillation sea water desalination device |
| CN113697886B (en) * | 2021-09-15 | 2022-05-06 | 中国海洋大学 | Solar energy distillation sea water desalination device |
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