Automatic device for continuously preparing and adding lime solution
By designing an automated device for continuous preparation and addition of lime solution, the problem of deposition blockage caused by static lime solution is solved, and the continuous preparation and addition of lime solution is realized, ensuring stable operation of the system and saving costs.
Patent Information
- Application Number
- CN202421504451.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing method of adding lime solution is intermittent dosing. When the dosing is stopped, the lime solution is still, resulting in lime deposits and blockage at the elbow of the dosing pipeline.
An automated device for continuous preparation and dosing of lime solution is designed, including a lime silo, lime weigher, screw conveyor, medicine dissolution tank, water inlet pipeline and dosing module. By continuously preparing and adding lime solution, the solution is kept flowing and preventing deposition.
The continuous preparation and addition of lime solution is realized to prevent lime from depositing and blocking in the dosing pipeline, ensure stable operation of the system, and save land occupation and investment costs.
Smart Images
Figure CN222829453U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wastewater treatment, in particular to an automated device for continuous preparation and dosing of lime solution. Background Art
[0002] Lime solution is a solution of a certain concentration prepared by adding solid Ca(OH)2 to a certain amount of water. Ca(OH)2 is slightly soluble in water. Calcium hydroxide will form a clear upper and lower layer boundary in water. The upper layer is clear lime water, and the lower layer is suspended lime milk. Lime solution can be used for building materials, food additives, chemical reagents, wastewater treatment coagulation and neutralization agents, etc. Since lime is not soluble in water, the amount of lime solution used in actual applications is relatively large. It is usually prepared in a dispensing tank and then pumped into a storage tank through a transfer pump. The dispensing tank needs to be equipped with a spare replacement group and a corresponding transfer pump.
[0003] At the same time, when the storage tank is in use, the water in the tank has poor relative fluidity, the lime solution is easy to stratify up and down, and the concentration of the lime solution in the storage tank is uneven, resulting in deviation in the dosing concentration, affecting the treatment effect. The lime solution gradually settles to the bottom of the tank. When the concentration at the bottom is too high, it is easy to scale and block the pipeline. The existing method generally adjusts the amount of lime by controlling the lime dosing pump. If the amount of lime is large, the volume of the storage tank needs to be set larger. If the amount of lime is small, the exchange volume of the lime solution in the storage tank is correspondingly reduced, the storage time of the lime solution is increased, and the risk of lime deposition and scaling is also increased.
[0004] However, the existing lime is generally dosed intermittently. When the dosing is stopped, the lime solution in the dosing pipeline is in a static state, and the lime is easy to deposit at the elbow of the dosing pipeline, blocking the dosing pipeline. Utility Model Content
[0005] The utility model aims to provide an automated device for continuous preparation and dosing of lime solution, aiming to solve the technical problem that the existing lime solution is generally dosed intermittently, when the dosing is stopped, the lime solution in the dosing pipeline is in a static state, the lime is easy to be deposited at the elbow of the dosing pipeline, and the dosing pipeline is blocked.
[0006] To achieve the above-mentioned purpose, the utility model adopts an automated device for continuous preparation and addition of lime solution, including a lime silo, a lime weighing device, a screw conveyor, a drug dissolving tank, a water inlet pipeline and a dosing module, the lime weighing device is arranged at the bottom of the lime silo, the drug dissolving tank is located on one side of the lime silo, the screw conveyor is respectively connected to the lime silo and the drug dissolving tank, the water inlet pipeline is connected to the drug dissolving tank and is located at the front end of the drug dissolving tank, and the dosing module is connected to the drug dissolving tank.
[0007] Among them, the dosing module includes a dosing pump, a dosing pipeline, a circulation reflux pipeline and a second control valve. The dosing pump is arranged on one side of the dissolved drug pool, the input end of the dosing pump is connected to the dissolved drug pool, one end of the dosing pipeline is connected to the output end of the dosing pump, and the two ends of the circulation reflux pipeline are respectively connected to the dosing pipeline and the dissolved drug pool, and the second control valve is arranged on the circulation reflux pipeline.
[0008] Wherein, the automated device for continuous preparation and addition of lime solution further comprises a stirring module, and the stirring module is arranged on the drug dissolving tank.
[0009] Wherein, the stirring module includes a plurality of guide baffles and two stirrers, the two stirrers are both connected to the drug-dissolving pool and are both located on the drug-dissolving pool, and the plurality of guide baffles are both fixedly connected to the drug-dissolving pool and are both located in the drug-dissolving pool.
[0010] The automated device for continuous preparation and addition of lime solution further comprises a flow meter and a first control valve, and both the flow meter and the first control valve are arranged on the water inlet pipeline.
[0011] The utility model discloses an automatic device for continuous preparation and dosing of lime solution. The lime dosage W=24t is required every day to treat a certain fluorine-containing wastewater. The lime solution configuration concentration c=25% is set. The dosing start reading W1=60t. According to calculation, the water requirement Q=3m3 / h and the dosing end reading W2=26t are obtained. The lime silo is discharged to the screw conveyor. The conveying rate of the screw conveyor is adjusted to 1t / h. The screw conveyor conveys the lime to the drug dissolving tank. Water flows to the drug dissolving tank through the water inlet pipeline. The lime and water are mixed in the drug dissolving tank. The prepared lime solution is pumped to the drug use point in the treatment area through the dosing module. At the same time, the excess lime The solution then flows back to the drug dissolving tank through the dosing module; after the lime weigher reaches the reading W2, the screw conveyor stops feeding; by setting the lime weigher and the water inlet pipeline, it is possible to automatically configure lime solutions of different concentrations, flexibly adapt to the fluctuation of water quality of industrial wastewater, and there is no need to frequently adjust the flow of the dosing pump, thus saving manpower. In the above process, a continuous preparation and addition form is adopted to couple the lime preparation process with the addition process, and a drug dispensing tank and a drug storage tank are not separately set up, thus saving land and investment costs. Through the above method, it is possible to simultaneously prepare and add the lime solution, prevent the lime from being deposited at the bottom of the tank and clogging the pipeline during the dosing process, and ensure stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 The utility model is a schematic diagram of the structure of an automated device for continuously preparing and adding lime solution.
[0014] 10-lime silo, 20-lime weigher, 30-screw conveyor, 40-drug dissolving tank, 41-flow guide baffle, 42-mixer, 50-water inlet pipeline, 51-flow meter, 52-first control valve, 60-dosing pump, 61-dosing pipeline, 62-circulation reflux pipeline, 63-second control valve, 70-drug application point in treatment area. DETAILED DESCRIPTION
[0015] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0016] See also Figure 1 The utility model provides an automated device for continuous preparation and dosing of lime solution, including a lime silo 10, a lime weigher 20, a screw conveyor 30, a drug dissolving tank 40, a water inlet pipeline 50 and a dosing module, wherein the lime weigher 20 is arranged at the bottom of the lime silo 10, the drug dissolving tank 40 is located on one side of the lime silo 10, the screw conveyor 30 is respectively connected to the lime silo 10 and the drug dissolving tank 40, the water inlet pipeline 50 is connected to the drug dissolving tank 40 and is located at the front end of the drug dissolving tank 40, and the dosing module is connected to the drug dissolving tank 40.
[0017] In this embodiment, the amount of lime required for treating a certain fluorine-containing wastewater is W=24t per day, the lime solution concentration is set to c=25%, the starting reading of addition is W1=60t, according to calculation, the water requirement is Q=3m3 / h, the ending reading of addition is W2=26t, the lime silo 10 drops material to the screw conveyor 30, the conveying rate of the screw conveyor 30 is adjusted to 1t / h, the screw conveyor 30 conveys lime to the drug dissolving tank 40, water flows to the drug dissolving tank 40 through the water inlet pipeline 50, lime and water are mixed in the drug dissolving tank 40, the prepared lime solution is pumped to the drug application point 70 in the treatment area through the dosing module, and the excess lime solution is returned to the drug dissolving tank 40 through the dosing module; after the lime weigher 20 reaches the reading W2, the screw conveyor 30 The screw conveyor 30 stops feeding; by setting the lime weigher 20 and the water inlet pipeline 50, it is possible to automatically configure lime solutions of different concentrations, flexibly adapt to the fluctuation of water quality of industrial wastewater, and there is no need to frequently adjust the flow of the dosing pump 60, saving manpower. In the above process, a continuous preparation and dosing form is adopted to couple the lime preparation process with the dosing process, and no separate preparation tank and storage tank are set, saving land and investment costs, wherein, the screw conveyor 30 is frequency-converted controlled, and the feeding rate can be adjusted according to the amount of lime added. The feeding flow of the dosing module is slightly greater than the amount of lime solution. The lime weigher 20 is set at the bottom of the lime silo 10. According to the starting reading and lime amount of the lime weigher 20, the ending reading of lime addition is calculated, and the calculation formula for controlling the lime addition amount is as follows:
[0018] ΔW=W=(W1-W2)
[0019] Wherein: ΔW is the amount of lime added, t; W1 is the starting reading of addition, t; W2 is the ending reading of addition, t. Through the above method, the lime solution can be prepared and added simultaneously to prevent the lime from being deposited at the bottom of the pool and clogging the pipeline during the dosing process, thereby ensuring the stable operation of the system.
[0020] Furthermore, the dosing module includes a dosing pump 60, a dosing pipeline 61, a circulation return pipeline 62 and a second control valve 63. The dosing pump 60 is arranged on one side of the drug-dissolving tank 40, the input end of the dosing pump 60 is connected to the drug-dissolving tank 40, one end of the dosing pipeline 61 is connected to the output end of the dosing pump 60, and the two ends of the circulation return pipeline 62 are respectively connected to the dosing pipeline 61 and the drug-dissolving tank 40, and the second control valve 63 is arranged on the circulation return pipeline 62.
[0021] In this embodiment, the circulation reflux pipeline 62 is arranged behind the dosing pump 60, and the dosing pump 60 is kept running during the dosing interval, so that the lime solution in the pipeline keeps flowing to prevent the lime from clogging the pipeline. At the same time, the lime solution in the dissolving tank 40 is ensured to flow continuously to prevent the lime solution from being unevenly configured due to the upper and lower stratification.
[0022] Furthermore, the automated device for continuously preparing and adding the lime solution further comprises a stirring module, and the stirring module is disposed on the drug dissolving tank 40 .
[0023] In this embodiment, by arranging the stirring module on the drug dissolving pool 40, the hydraulic retention time of lime dissolution can be increased, and hydraulic stirring can be used to prevent lime deposition on the pool bottom.
[0024] Furthermore, the stirring module includes a plurality of guide baffles 41 and two stirrers 42 , the two stirrers 42 are both connected to the drug-dissolving pool 40 and are both located on the drug-dissolving pool 40 , and the plurality of guide baffles 41 are both fixedly connected to the drug-dissolving pool 40 and are both located in the drug-dissolving pool 40 .
[0025] In this embodiment, the guide baffle 41 is set in the drug dissolving pool 40, and the guide baffle 41 is divided into an upper baffle and a lower baffle. The upper baffle and the lower baffle are set at intervals, and the number of the guide baffles 41 can be increased according to the preparation capacity. The drug dissolving pool 40 is provided with the stirrer 42, and the stirrer 42 adopts frequency conversion control, and the speed range is 60 to 80 rpm, which can increase the hydraulic retention time of lime dissolution, and at the same time utilize hydraulic stirring to prevent lime deposition at the bottom of the pool. Water flows to the drug dissolving pool 40 through the water inlet pipe 50, and the lime and water are evenly mixed in the drug dissolving pool 40 under the action of the guide baffle 41 and the stirrer 42.
[0026] Furthermore, the automated device for continuous preparation and addition of lime solution further comprises a flow meter 51 and a first control valve 52 , and both the flow meter 51 and the first control valve 52 are disposed on the water inlet pipeline 50 .
[0027] In this embodiment, by arranging the flow meter 51 and the first control valve 52 on the water inlet pipeline 50, it is possible to automatically configure lime solutions of different concentrations, flexibly adapt to the fluctuation of water quality of industrial wastewater, and there is no need to frequently adjust the flow of the dosing pump 60, saving manpower. According to the set lime solution configuration concentration and lime dosage, the required water volume is calculated, and the water inlet volume is controlled by the flow meter 51 and the first control valve 52. The calculation formula is as follows:
[0028]
[0029] In the formula: Q is the required water volume, m3 / h; W is the amount of lime used, t / d; c is the concentration of lime solution; ρ is the density of water, kg / m3.
[0030] The working principle of the utility model is: the lime consumption W=24t is required every day to treat a certain fluorine-containing wastewater, the lime solution configuration concentration c=25%, the addition start reading W1=60t, according to calculation, the water demand Q=3m3 / h, the addition end reading W2=26t; the lime silo 10 drops the material to the screw conveyor 30, the conveying rate of the screw conveyor 30 is adjusted to 1t / h, the screw conveyor 30 conveys the lime to the dissolving tank 40, opens and adjusts the opening of the first control valve 52, so that the flow meter 5 1 reading is consistent with the water demand, water flows to the drug dissolving tank 40 through the water inlet pipeline 50, lime and water are uniformly mixed in the drug dissolving tank 40 under the action of the guide baffle 41 and the stirrer 42, the prepared lime solution is pumped to the dosing point through the dosing pump 60 and the dosing pipeline 61, and at the same time, the opening of the second control valve 63 is adjusted to make the excess lime solution flow back to the drug dissolving tank 40 through the circulation return pipeline 62; after the lime weigher 20 reaches the reading W2, the screw conveyor 30 stops feeding.
[0031] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.
Claims
1. An automated device for continuous preparation and dosing of lime solution, characterized in that: It includes a lime silo, a lime weigher, a screw conveyor, a drug dissolving tank, a water inlet pipeline and a drug adding module, wherein the lime weigher is arranged at the bottom of the lime silo, the drug dissolving tank is located at one side of the lime silo, the screw conveyor is connected to the lime silo and the drug dissolving tank respectively, the water inlet pipeline is connected to the drug dissolving tank and is located at the front end of the drug dissolving tank, and the drug adding module is connected to the drug dissolving tank; The dosing module includes a dosing pump, a dosing pipeline, a circulation reflux pipeline and a second control valve. The dosing pump is arranged on one side of the soluble drug tank, the input end of the dosing pump is connected to the soluble drug tank, one end of the dosing pipeline is connected to the output end of the dosing pump, the two ends of the circulation reflux pipeline are respectively connected to the dosing pipeline and the soluble drug tank, and the second control valve is arranged on the circulation reflux pipeline.
2. The automated device for continuous preparation and addition of lime solution as claimed in claim 1, characterized in that: The automated device for continuous preparation and addition of lime solution also includes a stirring module, and the stirring module is arranged on the drug dissolving tank.
3. The automated device for continuous preparation and addition of lime solution as claimed in claim 2, characterized in that: The stirring module includes a plurality of guide baffles and two stirrers. The two stirrers are both connected to the drug-dissolving pool and are both located on the drug-dissolving pool. The plurality of guide baffles are both fixedly connected to the drug-dissolving pool and are both located in the drug-dissolving pool.
4. The automated device for continuous preparation and addition of lime solution as claimed in claim 1, characterized in that: The automated device for continuous preparation and addition of lime solution further comprises a flow meter and a first control valve, and both the flow meter and the first control valve are arranged on the water inlet pipeline.