A coking concentrated brine evaporation crystallization treatment system
Patent Information
- Application Number
- CN202522481508.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-11-24
AI Technical Summary
[0012]本实用新型运行时，启动电机，电机带动中轴转动，中轴带动底刮板、侧刮板和筒体刮板一同转动，同时启动加热层内以及所有竖筒内的加热元件，加热元件产生热量，关闭密封门，然后将焦化浓盐水从进液口装入主蒸室，加热元件对焦化浓盐水进行加热蒸发，运行一段时间后，焦化浓盐水中的水分蒸发，开始结晶，结晶到一定程度后，开启主蒸室底部的密封门，主蒸室内的晶体下落到再蒸室，关闭密封门，再次向主蒸室内装入新的焦化浓盐水，此时，在主蒸室内对新的焦化浓盐水进行蒸发结晶处理，而下落的结晶继续在再蒸室内进行二次水分蒸发处理，处理完毕后，开启再蒸室底部的密封门，再蒸室内的结晶下落到储晶室内储存，关闭密封门，然后再将主蒸室内的结晶排入再蒸室，以此类推，不断装入新的焦化浓盐水，然后不断向储晶室内排入结晶，定期排出即可。本实用新型运行时，在主蒸室内设置了若干竖筒，由于竖筒内设置了加热元件，加热元件产生的热量经竖筒向外传递，相比于传统蒸发装置，竖筒的内外表面都可以与焦化浓盐水接触，大幅增加了焦化浓盐水的加热面积，同时大幅增加了加热点位，若干加热点位同时运行进行加热蒸发，提高焦化浓盐水加热的均匀性，提高焦化浓盐水的加热结晶效率，同时，焦化浓盐水会先在主蒸室内进行蒸发结晶，而后会在再蒸室内再一次进行蒸发结晶处理，进一步提高蒸发结晶效率和结晶的质量；其次，在运行过程中，底刮板、侧刮板和筒体刮板都处于转动过程中，底刮板用于刮落粘附在主蒸室和再蒸室底部的结晶，侧刮板用于刮落粘附在主蒸室和再蒸室侧壁上的结晶，筒体刮板则用于刮落粘附在竖筒两个侧面上的结晶，避免结晶粘附过多，时刻保持传热面上的干净，确保焦化浓盐水的加热结晶效率；另外，本实用新型中设置了主蒸室、再蒸室和储晶室，主蒸室和再蒸室可分别独立地对焦化浓盐水进行蒸发结晶处理，主蒸室进行蒸发处理的同时，再蒸室内蒸发结晶后的晶体可排入储晶室，即，本实用新型在排出结晶时，不需打开蒸发罐，实现了结晶的边蒸发边取料操作，操作较为方便快捷，耗费时间较短，进而提高浓盐水的蒸发结晶效率。综上所述，本实用新型具有刮壁功能，结晶效率高，能实现边蒸发边取料。
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Figure CN224783853U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of coking concentrated brine evaporation and crystallization equipment, specifically to a coking concentrated brine evaporation and crystallization treatment system. Background Technology
[0002] In the process of producing coke, coal gas, and coking products from coal coking, a large amount of wastewater is generated. This coking wastewater has an extremely complex composition, containing high concentrations of toxic and harmful substances such as phenols, cyanides, ammonia nitrogen, and sulfides, as well as a large amount of organic matter and inorganic salts. In order to meet environmental protection requirements and wastewater reuse, coking plants will carry out deep treatment of coking wastewater, with the goal of "near-zero discharge". Coking concentrated brine is an unavoidable byproduct in the deep treatment and resource reuse of coking wastewater. It concentrates most of the salt and the most difficult pollutants to treat in the original wastewater.
[0003] Current coking brine evaporation and crystallization systems often suffer from the following problems: First, during evaporation, crystals inevitably precipitate and adhere to the heating pipes or the inner wall of the evaporator. Excessive crystal adsorption reduces heating and crystallization efficiency, increasing energy consumption. Second, after crystallization, the crystals adhere to the inside of the evaporator, often requiring opening the tank for removal. This method of opening the tank is cumbersome, time-consuming, and reduces the brine treatment efficiency, preventing simultaneous evaporation and material removal. Therefore, developing a coking brine evaporation and crystallization system with wall-scraping capabilities, high crystallization efficiency, and the ability to simultaneously evaporate and remove material is objectively necessary. Utility Model Content
[0004] The purpose of this invention is to provide a coking brine evaporation and crystallization treatment system with a wall scraping function, high crystallization efficiency, and the ability to simultaneously evaporate and extract material.
[0005] The purpose of this utility model is achieved as follows: it includes an evaporator and a liquid inlet located at the top of the evaporator. The interior of the evaporator is divided into a main evaporation chamber, a re-evaporation chamber, and a crystal storage chamber from top to bottom by a partition. The partition is equipped with a sealing door that is easy to open and close. A heating layer is provided on the outer wall of the main evaporation chamber and the re-evaporation chamber. Multiple vertical cylinders are concentrically arranged in the main evaporation chamber. The upper end of the vertical cylinder is fixedly connected to the top of the evaporator. Each vertical cylinder has a vent hole at its upper end. The lower end of the vertical cylinder is located at the bottom of the main evaporation chamber. Several heating elements are evenly distributed circumferentially inside the heating layer and inside the vertical cylinder. A central shaft is installed through the main evaporation chamber and the re-evaporation chamber. The upper end of the central shaft is connected to a motor installed at the top of the evaporator. Bottom scrapers are provided on the central shaft in the main evaporation chamber and the re-evaporation chamber. Side scrapers are provided on the bottom scrapers. Several cylindrical scrapers are provided on the bottom scrapers in the main evaporation chamber.
[0006] Furthermore, the sealed door includes a door panel and a track set on the door panel. An opening is machined in the partition, and the door panel is located in the opening. One side of the door panel is hinged to the opening. An electric telescopic rod is inclinedly set on the side wall of the evaporator below the door panel. A slider is hinged to the end of the electric telescopic rod, and the slider is slidably connected to the track.
[0007] Furthermore, a bottom heating block is provided on the partition.
[0008] Furthermore, a screw conveyor mechanism is provided at the bottom of the crystal storage chamber, and a crystal discharge port is provided at the bottom of the evaporator at the discharge end of the screw conveyor mechanism.
[0009] Furthermore, stirring blades are installed on the central shaft inside the re-distillation chamber.
[0010] Furthermore, several annular grooves are machined on the inner and outer surfaces of the vertical cylinder, and protrusions matching the cross-sectional shape of the annular grooves are machined on the side of the cylinder scraper.
[0011] Furthermore, exhaust pipes are installed at the top of both the main steam chamber and the re-steam chamber. After the exhaust pipes converge, they are connected to the cyclone separator. The bottom of the cyclone separator is connected to the top of the main steam chamber. A wire mesh demister is installed at the top of the cyclone separator.
[0012] When this invention is in operation, the motor is started, which drives the central shaft to rotate. The central shaft drives the bottom scraper, side scraper, and cylinder scraper to rotate together. At the same time, the heating elements in the heating layer and all vertical cylinders are activated. The heating elements generate heat, the sealing door is closed, and then the coking brine is loaded into the main distillation chamber through the inlet. The heating elements heat and evaporate the coking brine. After running for a period of time, the water in the coking brine evaporates and crystallization begins. After crystallization reaches a certain extent, the sealing door at the bottom of the main distillation chamber is opened, and the crystals in the main distillation chamber fall into the re-distillation chamber. The sealing door is closed, and new coking brine is loaded into the main distillation chamber again. At this time, the new coking brine undergoes evaporation and crystallization in the main distillation chamber, while the falling crystals continue to undergo secondary water evaporation in the re-distillation chamber. After the treatment is completed, the sealing door at the bottom of the re-distillation chamber is opened, and the crystals in the re-distillation chamber fall into the crystal storage chamber for storage. The sealing door is closed, and then the crystals in the main distillation chamber are discharged into the re-distillation chamber. This process is repeated, continuously loading new coking brine and continuously discharging crystals into the crystal storage chamber. The crystals are discharged periodically. In operation, this invention features several vertical cylinders within the main steaming chamber. Heating elements are installed inside these cylinders, and the heat generated by these elements is transferred outwards through the cylinders. Compared to traditional evaporation devices, the inner and outer surfaces of the vertical cylinders can contact the coking brine, significantly increasing the heating area and the number of heating points. Multiple heating points operate simultaneously for heating and evaporation, improving the uniformity of heating and the efficiency of crystallization. Furthermore, the coking brine undergoes evaporation and crystallization first in the main steaming chamber and then again in the secondary steaming chamber, further enhancing the evaporation and crystallization efficiency and quality. Secondly, during operation, the bottom scraper, side scrapers, and cylinder scraper all rotate. The bottom scraper is used for scraping... The system removes crystals adhering to the bottom of the main and re-distillation chambers. Side scrapers remove crystals adhering to the side walls of the main and re-distillation chambers, while cylinder scrapers remove crystals adhering to the two sides of the vertical cylinder. This prevents excessive crystal adhesion, keeps the heat transfer surfaces clean, and ensures efficient heating and crystallization of the coking brine. Furthermore, this invention includes a main steaming chamber, a re-distillation chamber, and a crystal storage chamber. The main and re-distillation chambers can independently evaporate and crystallize the coking brine. While the main steaming chamber is evaporating, the crystals evaporated and crystallized in the re-distillation chamber can be discharged into the crystal storage chamber. This means that the evaporation tank does not need to be opened when discharging crystals, enabling simultaneous evaporation and material removal. This operation is convenient, quick, and time-efficient, thus improving the evaporation and crystallization efficiency of the brine. In summary, this invention features a wall-scraping function, high crystallization efficiency, and the ability to simultaneously evaporate and remove material. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1A magnified structural diagram of node A in the middle; In the diagram: 1-Evaporator, 2-Main steaming chamber, 3-Re-steaming chamber, 4-Crystal storage chamber, 5-Sealed door, 6-Heating layer, 7-Vertical cylinder, 8-Heating element, 9-Central shaft, 10-Motor, 11-Bottom scraper, 12-Side scraper, 13-Cylinder scraper, 14-Railway, 15-Electric telescopic rod, 16-Bottom heating block, 17-Screwdriver mechanism, 18-Crystal discharge port, 19-Stirring blade, 20-Annular groove, 21-Protrusion, 22-Cyclone separator, 23-Wire mesh demister. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the present invention shall fall within the protection scope of the present invention.
[0015] like Figures 1-2 As shown, this utility model includes an evaporator 1 and a liquid inlet located at the top of the evaporator 1. The interior of the evaporator 1 is divided into a main evaporation chamber 2, a re-evaporation chamber 3, and a crystal storage chamber 4 from top to bottom by a partition. The partition is equipped with a sealing door 5 that is easy to open and close. The sealing door 5 is an existing structure that can be easily opened and closed. A heating layer 6 is provided on the outer wall of the main evaporation chamber 2 and the re-evaporation chamber 3. Multiple vertical cylinders 7 are concentrically arranged inside the main evaporation chamber 2. The upper end of the vertical cylinders 7 is fixedly connected to the top of the evaporator 1. Each vertical cylinder 7 has a vent hole at its upper end for the interconnection of steam in the upper part of the evaporator 1. To prevent steam from accumulating in the upper part of the evaporator 1, the lower end of the vertical cylinder 7 is located in the lower part of the main steam chamber 2. Several heating elements 8 are evenly distributed around the circumference of the heating layer 6 and the vertical cylinder 7. The heating elements 8 are existing heating structures that can generate heat. A central shaft 9 is installed through the main steam chamber 2 and the re-steam chamber 3. The upper end of the central shaft 9 is connected to the motor 10 installed on the top of the evaporator 1. Bottom scrapers 11 are respectively installed on the central shaft 9 in the main steam chamber 2 and the re-steam chamber 3. Side scrapers 12 are installed on the bottom scrapers 11. Several cylinder scrapers 13 are installed on the bottom scrapers 11 in the main steam chamber 2.
[0016] When this invention is in operation, the motor 10 is started, which drives the central shaft 9 to rotate. The central shaft 9 drives the bottom scraper 11, side scraper 12, and cylinder scraper 13 to rotate together. At the same time, the heating elements 8 in the heating layer 6 and all the vertical cylinders 7 are activated. The heating elements 8 generate heat, the sealing door 5 is closed, and then the coking brine is loaded into the main steaming chamber 2 through the inlet. The heating elements 8 heat and evaporate the coking brine. After running for a period of time, the water in the coking brine evaporates and crystallization begins. After crystallization reaches a certain degree, the sealing door 5 at the bottom of the main steaming chamber 2 is opened, and the crystals in the main steaming chamber 2... The crystals fall into the re-distillation chamber 3, the sealing door 5 is closed, and new coking brine is added to the main distillation chamber 2. At this time, the new coking brine is evaporated and crystallized in the main distillation chamber 2, while the falling crystals continue to undergo secondary water evaporation in the re-distillation chamber 3. After the treatment is completed, the sealing door 5 at the bottom of the re-distillation chamber 3 is opened, and the crystals in the re-distillation chamber 3 fall into the crystal storage chamber 4 for storage. The sealing door 5 is closed, and then the crystals in the main distillation chamber 2 are discharged into the re-distillation chamber 3. This process is repeated, continuously adding new coking brine and continuously discharging crystals into the crystal storage chamber 4. The crystals are then discharged periodically.
[0017] In operation, this invention features several vertical cylinders 7 within the main steaming chamber 2. Heating elements 8 are installed within these cylinders 7, and the heat generated by these elements is transferred outwards through the cylinders. Compared to traditional evaporation devices, the inner and outer surfaces of the vertical cylinders 7 can contact the coking brine, significantly increasing the heating area and the number of heating points. Multiple heating points operate simultaneously for heating and evaporation, improving the uniformity of heating the coking brine and enhancing its crystallization efficiency. Furthermore, the coking brine undergoes evaporation and crystallization first in the main steaming chamber 2, and then a second evaporation and crystallization process in the re-evaporation chamber 3, further improving evaporation and crystallization efficiency and crystal quality. Secondly, during operation, the bottom scraper 11, side scraper 12, and cylinder scraper 13 all rotate. The bottom scraper 11 scrapes off the material adhering to the main steaming chamber. The crystals at the bottom of the main steaming chamber 2 and the re-steaming chamber 3 are stirred. The side scraper 12 is used to scrape off the crystals adhering to the side walls of the main steaming chamber 2 and the re-steaming chamber 3 and stir them. The cylinder scraper 13 is used to scrape off the crystals adhering to the two sides of the vertical cylinder 7 to avoid excessive crystal adhesion and keep the heat transfer surface clean at all times, ensuring the heating and crystallization efficiency of the coking brine. In addition, this utility model is provided with a main steaming chamber 2, a re-steaming chamber 3 and a crystal storage chamber 4. The main steaming chamber 2 and the re-steaming chamber 3 can independently perform evaporation and crystallization treatment on the coking brine. While the main steaming chamber 2 is performing evaporation treatment, the crystals after evaporation and crystallization in the re-steaming chamber 3 can be discharged into the crystal storage chamber 4. That is, this utility model does not need to open the evaporation tank 1 when discharging crystals, realizing the operation of evaporation and material removal at the same time, which is more convenient and faster, consumes less time, and thus improves the evaporation and crystallization efficiency of the brine.
[0018] The sealing door 5 includes a door panel and a track 14 mounted on the door panel. An opening is machined into the partition, and the door panel is located within the opening. One side of the door panel is hinged to the opening. An electric telescopic rod 15 is obliquely mounted on the side wall of the evaporator 1 below the door panel. The electric telescopic rod 15 is an existing mechanism, but a cylinder or other telescopic structure can also be used. A slider is hinged to the end of the electric telescopic rod 15, and the slider is slidably connected to the track 14. When the sealing door 5 needs to be opened, the electric telescopic rod 15 is activated, causing it to retract. This retracts the rod, causing the door panel to rotate via the slider, gradually opening the sealing door 5. Crystals above the sealing door 5 fall into the lower chamber. Conversely, when it needs to be closed, the electric telescopic rod 15 extends, lifting the door panel upwards to close the opening and isolate the adjacent chambers.
[0019] A bottom heating block 16 is provided on the partition. The bottom heating block 16 is an existing heating structure. When the power is turned on, the heat can be transferred out through the partition to heat and evaporate the coking brine in the main steaming chamber 2 and the re-steaming chamber 3 from the bottom, thereby improving the uniformity of heating of the coking brine and improving the evaporation and crystallization efficiency of the coking brine.
[0020] A screw conveyor mechanism 17 is provided at the bottom of the crystal storage chamber 4. A crystal discharge port 18 is provided at the bottom of the evaporator 1 at the discharge end of the screw conveyor mechanism 17. The screw conveyor mechanism 17 is existing technology and is located at the bottom of the crystal storage chamber 4. When the crystals in the re-evaporation chamber 3 fall into the crystal storage chamber 4, they can be automatically transported out by the screw conveyor mechanism 17.
[0021] A stirring blade 19 is installed on the central shaft 9 inside the re-evaporation chamber 3. After evaporation and crystallization in the main evaporation chamber 2, the crystals fall into the re-evaporation chamber 3 and are stirred by the stirring blade 19 to improve the uniformity of heating and evaporation, thereby improving the evaporation and crystallization efficiency of the crystals in the re-evaporation chamber 3.
[0022] Several annular grooves 20 are machined on the inner and outer surfaces of the vertical cylinder 7. The side surface of the cylinder scraper 13 is machined with protrusions 21 that match the cross-sectional shape of the annular grooves 20. The annular grooves 20 are set on the two sides of the vertical cylinder 7, which can increase the surface area on the side surface, thereby increasing the contact area between the coking brine and the side surface of the vertical cylinder 7, and ultimately improving the evaporation and crystallization efficiency of the coking brine.
[0023] Both the main steam chamber 2 and the re-steam chamber 3 are equipped with exhaust pipes at their tops. The exhaust pipes converge and connect to the cyclone separator 22. The bottom of the cyclone separator 22 is connected to the top of the main steam chamber 2. A wire mesh demister 23 is installed at the top of the cyclone separator 22. During the evaporation process, when the liquid boils violently, a large number of bubbles will be generated on the liquid surface. When the bubbles burst, tiny droplets will be splashed into the upper steam space. These droplets come from the supersaturated solution and may contain tiny crystal nuclei or crystals. These entrained droplets containing crystals will be discharged with the steam, which will cause problems for subsequent processes. To solve this problem, the cyclone separator 22 is set up to separate the droplets or crystals entrained in the steam. At the same time, the wire mesh demister 23 is used to further remove impurities such as droplets and crystals from the steam, thereby improving the purification of the steam.
Claims
1. A coking brine evaporation and crystallization treatment system, comprising an evaporator (1) and a liquid inlet disposed at the top of the evaporator (1), characterized in that: The interior of the evaporator (1) is divided into a main steam chamber (2), a re-steam chamber (3), and a crystal storage chamber (4) from top to bottom by a partition. The partition is equipped with a sealing door (5) for easy opening and closing. A heating layer (6) is provided on the outer wall of the main steam chamber (2) and the re-steam chamber (3). Multiple vertical cylinders (7) are concentrically arranged inside the main steam chamber (2). The upper end of each vertical cylinder (7) is fixedly connected to the top of the evaporator (1). Each vertical cylinder (7) has a vent hole at its upper end. The lower end of each vertical cylinder (7) is located at the lower part of the main steam chamber (2). The heating layer... Several heating elements (8) are evenly distributed around the inside of the layer (6) and the inside of the vertical cylinder (7). A central shaft (9) is installed through the main steam chamber (2) and the re-steam chamber (3). The upper end of the central shaft (9) is connected to the motor (10) installed on the top of the evaporator (1). Bottom scrapers (11) are respectively installed on the central shaft (9) in the main steam chamber (2) and the re-steam chamber (3). Side scrapers (12) are installed on the bottom scrapers (11). Several cylinder scrapers (13) are installed on the bottom scrapers (11) in the main steam chamber (2).
2. The coking concentrated brine evaporation and crystallization treatment system according to claim 1, characterized in that: The sealed door (5) includes a door panel and a track (14) set on the door panel. An opening is processed on the partition, and the door panel is located in the opening. One side of the door panel is hinged to the opening. An electric telescopic rod (15) is inclinedly arranged on the side wall of the evaporator (1) below the door panel. A slider is hinged to the end of the electric telescopic rod (15), and the slider is slidably connected to the track (14).
3. The coking concentrated brine evaporation and crystallization treatment system according to claim 1, characterized in that: The partition is provided with a bottom heating block (16).
4. The coking concentrated brine evaporation and crystallization treatment system according to claim 1, characterized in that: The bottom of the crystal storage chamber (4) is provided with a screw conveyor mechanism (17), and the bottom of the evaporator (1) at the discharge end of the screw conveyor mechanism (17) is provided with a crystal discharge port (18).
5. The coking concentrated brine evaporation and crystallization treatment system according to claim 1, characterized in that: A stirring blade (19) is provided on the central shaft (9) inside the re-steaming chamber (3).
6. The coking concentrated brine evaporation and crystallization treatment system according to claim 1, characterized in that: The inner and outer surfaces of the vertical cylinder (7) are respectively machined with several annular grooves (20), and the side of the cylinder scraper (13) is machined with protrusions (21) that match the cross-sectional shape of the annular grooves (20).
7. The coking concentrated brine evaporation and crystallization treatment system according to claim 1, characterized in that: The top of the main steam chamber (2) and the re-steam chamber (3) are both equipped with exhaust pipes. After the exhaust pipes converge, they are connected to the cyclone separator (22). The bottom of the cyclone separator (22) is connected to the top of the main steam chamber (2). The top of the cyclone separator (22) is equipped with a wire mesh demister (23).