Mother liquor drying all-in-one machine
The integrated mother liquor drying machine solves the problem of treating high-salt and high-organic-content mother liquor by drying and condensing the mother liquor, achieving efficient concentration and stable operation, and reducing system load and cost.
Patent Information
- Application Number
- CN202520010664.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing technologies are difficult to effectively treat mother liquor with high salt and high organic content, resulting in high treatment load, poor stability, and unstable operation of the evaporation system.
The integrated mother liquor drying machine supplies mother liquor to the drying chamber through a feed metering tank. It uses steam heat pipes for heating and drying, combined with a condenser to condense water vapor, thereby achieving evaporation and concentration of the mother liquor, reducing the moisture content. Furthermore, it optimizes the treatment through a demister and compressed air pipeline to reduce scaling and energy consumption.
It achieves efficient concentration of mother liquor, reduces processing load, improves system stability, saves energy, reduces scaling risk, and lowers operating costs.
Smart Images
Figure CN223705264U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of water treatment system, especially relates to a mother liquor drying integrated machine. BACKGROUND
[0002] At present, the main method of treating domestic waste in cities and towns of China is landfill, and a large amount of landfill leachate is generated in the process of landfill. The leachate treatment plant of domestic waste landfill generally adopts a leachate treatment process of biochemistry plus membrane. The biochemistry section generally adopts the process of MBR (Membrane Bio-Reactor) membrane bioreactor, and the membrane depth treatment section generally adopts the process of RO (reverse osmosis) / NF (nanofiltration). About 20-40% of membrane concentrate is generated in the membrane depth treatment section. Due to the high indicators such as conductivity, salt content and hardness, and poor biodegradability, the currently feasible treatment process is generally MVR forced circulation evaporation process. In the MVR forced circulation evaporation process, the membrane concentrate can be separated into three parts of condensate water, salt and a small part of evaporation mother liquor. The condensate water can be discharged or reused, and the salt is packaged in tons of bags and transported for landfill. However, about 5%-10% of the small part of evaporation mother liquor must be discharged from the evaporation system because it contains saturated salt and a high content of organic matter and other substances, so as to avoid affecting the stable operation of the evaporation system.
[0003] In addition, various coal chemical industry high-salinity water, high-concentration organic wastewater, hazardous liquid waste and other industries of high-difficulty wastewater will also generally use MVR, multi-effect evaporation and other processes with good treatment effect for treatment. After the wastewater of these industries is treated by the MVR and multi-effect evaporation system, the problem of a large amount of mother liquor needing to be treated also exists. INVENTION CONTENTS
[0004] The present application provides a kind of mother liquor drying integrated machine to solve the above-mentioned mother liquor treatment problem.
[0005] The mother liquor drying integrated machine includes a feed metering tank and a mother liquor drying unit. The feed metering tank is used to store mother liquor. The mother liquor drying unit is provided with a drying chamber. The drying chamber is provided with a feed pipe connected to the feed metering tank, so that the feed metering tank can supply the stored mother liquor to the drying chamber. The mother liquor drying unit is provided with a steam heat pipe for delivering saturated steam to heat and dry the mother liquor in the drying chamber. A discharge screw is arranged at the bottom of the drying chamber to discharge dry material produced after the mother liquor is dried. A condenser is connected to the top of the drying chamber through an air outlet pipe. The condenser is used to cool the water vapor produced after the mother liquor is heated to condensate liquid.
[0006] According to the technical solution, the utility model realizes the following beneficial effects:
[0007] The utility model discloses a feed metering tank supplies the mother liquor stored to the dry room of mother liquor drying all -in -one, then, saturated steam passes through steam heat pipe and enters the heat exchange cover of mother liquor drying all -in -one to heat and dry the mother liquor in dry room, at this time, the mother liquor absorbs the heat of saturated steam and boils and evaporates, and the moisture forms secondary water vapor and separates from material, and then condenses into condensed water through condenser and is discharged, and simultaneously, the dry material produced after the dry of mother liquor is sent out by the discharge screw.
[0008] Therefore, by giving the mother liquor heat drying, the moisture of the mother liquor is evaporated and separated, the mother liquor is concentrated and dried to a residue or waste liquid with lower water content, the mother liquor is further concentrated and reduced in amount, and the treatment load of the mother liquor is reduced, and in addition, the water vapor is cooled by the condenser to a liquid with relatively low conductivity, salt content and hardness, so as to facilitate the discharge or recycling of the liquid in the later period.
[0009] In order to further optimize the above technical scheme, one or more of the following embodiments can be combined without conflict.
[0010] In some embodiments, a demisting net is arranged at the inlet of the gas outlet pipeline to allow the water vapor to pass through.
[0011] According to the technical scheme, a small amount of salt particles and a small amount of organic matter carried in the water vapor are removed by the demisting net, and then enter the condenser for cooling, so that the impurities in the condensed liquid can be effectively reduced.
[0012] In some embodiments, a compressed air pipeline is arranged in the dry room, and the compressed air pipeline is used to pressurize or depressurize the air in the dry room.
[0013] According to the technical scheme, the dry room is pressurized or depressurized by the compressed air pipeline, so that the saturated steam transported by the steam heat pipe can more efficiently heat and dry the mother liquor in the dry room, and in addition, by controlling the air pressure in the dry room, the process of heating and drying the mother liquor in the dry room by the steam heat pipe can effectively reduce scaling, reduce energy consumption, improve operation reliability and operation cost.
[0014] In some embodiments, the feed metering tank is provided with a liquid level meter to monitor the amount of mother liquor supplied to the dry room.
[0015] According to the technical solution, in a normal working state, the amount of mother liquor fed into the drying chamber is controlled by the amount of mother liquor in the feed metering tank obtained by the liquid level meter, so that the feed metering tank can be connected to the MVR, multi-effect evaporation system and the like, continuously collecting and storing the mother liquor generated by the MVR, multi-effect evaporation system and the like, and when the amount of stored mother liquor reaches a certain amount, the stored mother liquor can be fed into the drying chamber, thereby improving the working efficiency and ensuring the working stability of the MVR, multi-effect evaporation system and the like.
[0016] In some embodiments, a mother liquor drying all-in-one machine includes a heat exchanger, the feed pipe passes through the heat exchanger, and the gas outlet pipe is bifurcated to provide a sub-gas outlet pipe passing through the heat exchanger, so that the water vapor can preheat the mother liquor entering the drying chamber, and the mother liquor entering the drying chamber can cool the water vapor;
[0017] According to the technical solution, the water vapor can preheat the mother liquor entering the drying chamber, and the mother liquor entering the drying chamber can cool the water vapor, so as to realize waste heat recovery, thereby saving energy use and reducing operating costs.
[0018] In some embodiments, a mother liquor drying all-in-one machine further includes a vacuum circulating water tank and a circulating cooling water system for supplying circulating cooling water to the vacuum circulating water tank and the condenser. The condenser is connected to the vacuum circulating water tank by a pipeline, so that when the gas in the condenser is discharged outward, the vacuum circulating water tank is used to collect the condensate water generated when the discharged gas is cooled. The sub-gas outlet pipe is connected to the vacuum circulating water tank after passing through the heat exchanger, and the vacuum circulating water tank is used to cool the water vapor output by the sub-gas outlet pipe and collect the generated condensate water.
[0019] According to the technical solution, the circulating cooling water system can cool the vacuum circulating water tank, so that when the gas in the condenser is discharged outward, it is pre-cooled by passing through the vacuum circulating water tank. At this time, the vacuum circulating water tank cools the discharged gas twice and collects the condensate water generated when the gas is cooled. In addition, since the mother liquor entering the drying chamber can cool part of the water vapor in the sub-gas outlet pipe, condensate water will be generated when the water vapor is cooled. At this time, the vacuum circulating water tank collects the condensate water, and the vacuum circulating water tank also cools the remaining water vapor in the sub-gas outlet pipe and collects the condensate water generated by cooling the water vapor.
[0020] In some embodiments, a mother liquor drying all-in-one machine further includes a first condensate water collection tank, the vacuum circulating water tank and the condenser are connected to the first condensate water collection tank by a pipeline, and the first condensate water collection tank is used to collect the condensate water of the vacuum circulating water tank and the condensate water generated by cooling the water vapor by the condenser.
[0021] According to the technical scheme, the condensate water is collected by the first condensate water collecting tank, so that the later recycling, discharge or other treatment of all the condensate water is facilitated.
[0022] In some embodiments, the mother liquor drying all-in-one machine further comprises a second condensate water collecting tank connected with the steam heat conduction pipe.
[0023] According to the technical scheme, when the saturated steam is delivered by the steam heat conduction pipe to heat and dry the mother liquor in the drying chamber, the heating steam is cooled into cooling liquid, at this time, the cooling water is discharged or recycled later by the second condensate water collecting tank. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the specific embodiments in the present application, the following will briefly describe the drawings and labels used in the description of the specific embodiments.
[0025] Figure 1 is the structural layout diagram of the present application;
[0026] Figure 2 is the structural schematic diagram of the present application.
[0027] Reference signs:
[0028] 1, feed metering tank; 2, mother liquor drying unit; 3, heat exchanger; 4, condenser; 5, circulating cooling water system; 6, vacuum circulating water tank; 7, first condensate water collecting tank; 8, second condensate water collecting tank; 9, steam heat conduction pipe; 10, compressed air pipeline; 11, discharge screw; 12, demisting net. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the following will be illustrated with reference to the drawings.
[0030] As shown in Figure 1 and 2 , the present specific embodiment provides a mother liquor drying all-in-one machine, which comprises a feed metering tank 1, a mother liquor drying unit 2, a heat exchanger 3, a condenser 4, a circulating cooling water system 5, a vacuum circulating water tank 6, a first condensate water collecting tank 7 and a second condensate water collecting tank 8.
[0031] The feed metering tank can be communicated with MVR, multi-effect evaporation system and other treatments, so that the feed metering tank can continuously collect the mother liquor in the MVR, multi-effect evaporation system and other systems; the feed metering tank can also store membrane concentrate. The feed metering tank 1 is provided with a liquid level meter.
[0032] The mother liquor drying unit 2 is provided with a drying chamber, which is provided with a feeding pipeline connected with the feed metering tank 1. When the liquid level meter senses that the feed metering tank stores a specific amount of mother liquor (or membrane concentrate), the feed metering tank 1 can supply the stored mother liquor to the drying chamber. The drying chamber is provided with a compressed air pipeline 10 for pressurizing or depressurizing the air in the drying chamber. The mother liquor drying unit 2 is provided with a steam heat pipe 9 for transmitting high-temperature and saturated steam, so that the steam heat pipe 9 can heat and dry the mother liquor in the drying chamber. At this time, the mother liquor absorbs the heat of the saturated steam and boils and evaporates, and the water forms secondary water vapor and separates from the material, until the mother liquor forms about 5% of a powdery residue or is concentrated to about 10% of waste liquid. The saturated steam is isolated from the mother liquor, and the second condensate water collecting tank 8 is connected with the steam heat pipe 9. When the steam heat pipe 9 delivers the saturated steam to heat and dry the mother liquor in the drying chamber, the saturated steam is cooled into cooling liquid, and at this time, the cooling liquid is collected through the second condensate water collecting tank 8. The drying chamber can be provided with a heat exchange jacket connected with the steam heat pipe 9, so as to improve the efficiency of the saturated steam for heating and drying the mother liquor in the drying chamber. The bottom of the drying chamber is provided with a discharge screw 11 for discharging the powdery residue or waste liquid out of the drying chamber.
[0033] The top of the drying chamber is connected with a condenser 4 through an exhaust pipeline, and the condenser 4 cools the water vapor generated after the mother liquor is heated. The inlet of the exhaust pipeline is provided with a demisting net 12 for allowing the water vapor to pass through, and the demisting net removes a small amount of salt particles and a small amount of organic matter carried by the steam.
[0034] The feeding pipeline passes through the heat exchanger 3, and the exhaust pipeline is bifurcated to be provided with a secondary exhaust pipeline passing through the heat exchanger 3, so that the steam can preheat the mother liquor entering the drying chamber, and the mother liquor entering the drying chamber can cool the steam.
[0035] The circulating cooling water system 5 is used to supply circulating cooling water to the vacuum circulating water tank 6 and the condenser 4, and the circulating cooling water is isolated from the outside. The condenser 4 is connected with the vacuum circulating water tank 6 through a pipeline, so that the gas in the condenser 4 passes through the vacuum circulating water tank 6 before being discharged to the outside, and the vacuum circulating water tank 6 performs secondary cooling on the discharged gas and collects the condensate water generated during the cooling. The secondary exhaust pipeline is connected with the vacuum circulating water tank 6 after passing through the heat exchanger 3. Since the mother liquor entering the drying chamber can cool part of the water vapor in the secondary exhaust pipeline, the part of the water vapor generates condensate water, and at this time, the vacuum circulating water tank collects the condensate water. At the same time, the vacuum circulating water tank also cools the remaining water vapor in the secondary exhaust pipeline and collects the condensate water generated by cooling the water vapor.
[0036] The vacuum circulating water tank 6 and the condenser 4 are connected with a first condensed water collecting tank 7, which is used to collect the condensed water cooled in the vacuum circulating water tank 6 and the condensed water produced by the condenser 4 cooling water vapor.
[0037] The equipment performance parameters of the mother liquor drying all-in-one machine are as follows:
[0038] 1. Inlet water range: pH: 2-12; salinity: ≤50%;
[0039] 2. Working temperature: 45~75℃;
[0040] 4. Temperature of external heating saturated steam: 100-165℃;
[0041] 3. Single set processing scale: 2 tons / day~50 tons / day;
[0042] 5. Steam consumption per ton: 1.25 tons~1.5 tons of steam (165℃, 6bar) / ton of waste liquid.
Claims
1. A mother liquor drying all-in-one machine, characterized in that: The system includes a feed metering tank (1) and a mother liquor drying unit (2). The feed metering tank (1) is used to store mother liquor. The mother liquor drying unit (2) is equipped with a drying chamber. The drying chamber is equipped with a feed pipeline connected to the feed metering tank (1) so that the feed metering tank (1) can supply the stored mother liquor to the drying chamber. The mother liquor drying unit (2) is equipped with a steam heat conduction pipe (9). The steam heat conduction pipe (9) is used to transport saturated steam to heat and dry the mother liquor in the drying chamber. A discharge screw (11) is provided at the bottom of the drying chamber. The discharge screw (11) is used to send out the dry material generated after the mother liquor is dried. A condenser (4) is connected to the top of the drying chamber through an air outlet pipeline. The condenser (4) is used to cool the water vapor generated after the mother liquor is heated until the condensate is discharged.
2. The mother liquor drying all-in-one machine according to claim 1, characterized in that: The inlet of the air outlet pipe is equipped with a demisting screen (12) to allow the water vapor to pass through.
3. The mother liquor drying all-in-one machine according to claim 1, characterized in that: The drying chamber is equipped with a compressed air pipeline (10), which is used to pressurize or depressurize the air in the drying chamber.
4. The mother liquor drying all-in-one machine according to claim 1, characterized in that: The feed metering tank (1) is equipped with a level gauge to monitor the amount of mother liquor supplied to the drying chamber.
5. The mother liquor drying all-in-one machine according to claim 1, characterized in that: It also includes a heat exchanger (3), the feed pipeline passes through the heat exchanger (3), and the outlet pipeline is branched off to have a secondary outlet pipeline passing through the heat exchanger (3), so that the water vapor can preheat the mother liquor entering the drying chamber, and the mother liquor entering the drying chamber can cool the water vapor in the secondary outlet pipeline.
6. The integrated mother liquor drying machine according to claim 5, characterized in that: It also includes a vacuum circulating water tank (6) and a circulating cooling water system (5), the circulating cooling water system (5) being used to supply circulating cooling water to the vacuum circulating water tank (6) and the condenser (4), the condenser (4) being piped to the vacuum circulating water tank (6) so that when the gas from the condenser (4) is discharged outward, the vacuum circulating water tank (6) is used to collect the condensate generated when cooling the discharged gas, the auxiliary gas outlet pipe passing through the heat exchanger (3) and then connected to the vacuum circulating water tank (6), the vacuum circulating water tank (6) being used to cool the water vapor output from the auxiliary gas outlet pipe and collect the condensate generated.
7. The integrated mother liquor drying machine according to claim 6, characterized in that: It also includes a first condensate collection tank (7), the vacuum circulating water tank (6) and the condenser (4) are connected to the first condensate collection tank (7) by pipes, the first condensate collection tank (7) is used to collect and store the condensate in the vacuum circulating water tank (6) and collect the condensate generated by the condenser (4) cooling the steam.
8. The integrated mother liquor drying machine according to claim 1, characterized in that: It also includes a second condensate collection tank (8), which is connected to the steam heat pipe (9).