Crude ammonia water purification system
Through the reaction of lime powder with crude ammonia water and deep purification of the filter unit, the problems of easy blockage of filter materials and complex equipment in traditional devices are solved, and efficient and low-cost ammonia water purification is achieved, which is green and environmentally friendly.
Patent Information
- Application Number
- CN202421163284.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-24
AI Technical Summary
Traditional crude ammonia water purification devices have a series of problems such as excessively dense filter materials, large pore sizes and no interception effects, complex equipment, high on-site management requirements and high energy consumption.
Lime powder reacts with crude ammonia water to form a solid-liquid mixture for solid-liquid separation. Then, the residual impurities are deeply purified by filtration units to avoid the filtration of purely reliance on activated carbon and resin adsorption and filtration, which can easily be saturated and failed, reduce energy consumption and purification costs, and the equipment is simple and easy to use. Implementation, on-site management requirements are low.
It effectively improves purification efficiency, reduces energy consumption and purification costs, achieves green and environmentally friendly effects, and avoids the problems of easy blockage of filter materials and complex equipment.
Smart Images
Figure CN222348843U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coal chemical equipment, and specifically relates to a crude ammonia water purification system. Background Art
[0002] Semi-coke wastewater, also known as semi-coke wastewater, refers to a kind of industrial wastewater formed during the medium-low temperature dry distillation (about 600-800°C) process of low-metamorphosis coal (non-sticky coal, weakly sticky coal, long flame coal), gas purification, and steam quenching of semi-coke. This kind of wastewater has complex components and contains a large number of difficult-to-degrade and highly toxic pollutants, such as organic pollutants such as benzene series, phenols, polycyclic aromatic hydrocarbons, nitrogen-oxygen heterocyclic compounds, and inorganic pollutants such as heavy metals. It is a typical highly polluted and highly toxic industrial wastewater. The usual practice is to classify and purify the ammonia, phenol, and sulfur in the semi-coke wastewater as much as possible. Among them, alkalinization and ammonia evaporation are often used for ammonia recovery. Because the organic quality of semi-coke wastewater is multi-component and complex, the obtained ammonia water is reddish brown, the viscosity is greater than that of water, the odor is mixed, and the drying residue is about 3%w, which is crude ammonia water. This kind of crude ammonia water has not yet met the requirements for desulfurization and denitrification of boiler flue and needs to be purified.
[0003] However, traditional crude ammonia purification devices have a series of problems such as dense filter materials that are easy to clog, large pores with no interception effect, complex equipment, high on-site management requirements and high energy consumption. Utility Model Content
[0004] In order to solve the above problems existing in the related art, the utility model provides a crude ammonia water purification system. The technical problem to be solved by the utility model is achieved through the following technical solutions:
[0005] A crude ammonia water purification system, the system comprising: a feeder, a slurry reactor, a solid-liquid separator and a filtering unit; wherein:
[0006] The discharge port of the feeder is communicated with the feed port of the slurry reactor, and the feeder is used to pour lime powder into the slurry reactor so that the lime powder reacts with the crude ammonia water entering the slurry reactor through the liquid inlet of the slurry reactor to generate a solid-liquid mixture;
[0007] The input port of the solid-liquid separator is connected to the liquid outlet of the slurry reactor, the first output port of the solid-liquid separator is connected to the input port of the filtration unit, the solid-liquid mixture enters the solid-liquid separator through the liquid outlet of the slurry reactor and the input port of the solid-liquid separator, the solid-liquid separator performs solid-liquid separation on the solid-liquid mixture, the separated liquid wastewater enters the filtration unit through the first output port of the solid-liquid separator and the input port of the filtration unit, the filtration unit filters the liquid wastewater to obtain ammonia water.
[0008] In some embodiments, the feeder includes: a lime bin and a screw conveyor; wherein a star-shaped discharger is provided inside the lime bin, and the star-shaped discharger is used to control the rotation of the star-shaped blades inside the star-shaped discharger to push the lime powder to be discharged from the discharge port of the lime bin; a feed port is provided on the screw conveyor, and the discharge port of the lime bin is connected to the feed port of the screw conveyor, and the discharge port of the screw conveyor serves as the discharge port of the feeder and is connected to the feed port of the slurry reactor, and the lime powder discharged from the discharge port of the lime bin enters the slurry reactor through the discharge port of the screw conveyor and the feed port of the slurry reactor.
[0009] In some embodiments, the filtration unit includes: a first liquid collecting tank, a lifting pump, a filter boost pump and an activated carbon filter; the input port of the first liquid collecting tank is connected to the first output port of the solid-liquid separator as the input port of the filtration unit, the output port of the first liquid collecting tank is connected to the input port of the lifting pump, the output port of the lifting pump is connected to the input port of the filter boost pump, the output port of the filter boost pump is connected to the input port of the activated carbon filter, the output port of the activated carbon filter is connected to the liquid inlet of a liquid storage tank, and the liquid storage tank is used to store the ammonia water; the first liquid collecting tank is used to store the liquid phase wastewater, the lifting pump extracts the liquid phase wastewater in the first liquid collecting tank, and transports the liquid phase wastewater to the filter boost pump located at a high place, the filter boost pump filters impurities in the liquid phase wastewater, and pressurizes the filtered liquid to the activated carbon filter, and the activated carbon filter adsorbs and purifies the filtered liquid to obtain the ammonia water.
[0010] In some embodiments, the system also includes: a slurry delivery pump; the liquid inlet of the slurry delivery pump is connected to the liquid outlet of the slurry reactor, and the liquid outlet of the slurry delivery pump is connected to the liquid inlet of the slurry reactor; a first control valve is provided on the liquid inlet of the slurry delivery pump, and the first control valve is used to open or close the liquid inlet of the slurry delivery pump.
[0011] In some embodiments, the output port of the activated carbon filter is also respectively connected to the output port of the lifting pump and the liquid inlet of the slurry delivery pump; a second control valve is also provided on the output port of the activated carbon filter, and the purified liquid is released to the output port of the lifting pump, the liquid inlet of the slurry delivery pump or the liquid inlet of the liquid storage tank through the second control valve.
[0012] In some embodiments, the slurry reactor is provided with a radar level meter; the radar level meter is used to monitor the liquid level of the mixed liquid formed by the lime powder and the crude ammonia water in the slurry reactor.
[0013] In some embodiments, the system also includes: a second liquid collecting tank, the water inlet of the second liquid collecting tank is connected to the output port of the lifting pump, the water outlet of the second liquid collecting tank is connected to the input port of the filter booster pump, and the second liquid collecting tank is used to store the liquid wastewater discharged from the output port of the lifting pump.
[0014] In some embodiments, the solid-liquid separator further includes a second output port, and the second output port of the solid-liquid separator is used to discharge the separated solid impurities.
[0015] In some embodiments, the feeder, the slurry reactor, the solid-liquid separator, the first liquid collecting tank, the lifting pump, the filter booster pump, the activated carbon filter and the second liquid collecting tank are all made of 316 stainless steel.
[0016] In some embodiments, a limit sensor is provided on the discharge port of the screw conveyor for controlling the opening and closing of the discharge port of the screw conveyor.
[0017] The utility model has the following beneficial technical effects:
[0018] In view of the series of problems in traditional crude ammonia water purification devices, such as dense filtering materials that are easy to be blocked, large pores and no interception effect, complex equipment, high requirements for on-site management and high energy consumption, the utility model provides a crude ammonia water purification system, which utilizes lime powder to react with crude ammonia water to adsorb impurities in the crude ammonia water, release the organic matter association in the crude ammonia water, and then uses a filtration unit to deeply purify the remaining small amount of impurities, effectively avoiding the disadvantages of relying solely on activated carbon and resin adsorption filtration that is easy to saturate and fail, and has the advantages of reducing energy consumption and purification costs, simple and easy implementation of equipment, low requirements for on-site management, improving purification efficiency and being green and environmentally friendly.
[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a structural block diagram of the crude ammonia purification system provided by the utility model;
[0021] Figure 2 It is a structural schematic diagram of a crude ammonia water purification system provided by the utility model.
[0022] Description of Figure Numbers:
[0023] 1-lime silo; 2-screw conveyor; 3-slurry reactor; 4-slurry delivery pump; 5-solid-liquid separator; 6-tank truck; 7-first liquid collecting tank; 8-lifting pump; 9-second liquid collecting tank; 10-filtration booster pump; 11-activated carbon filter. DETAILED DESCRIPTION
[0024] The present invention is further described in detail below in conjunction with specific embodiments, but the implementation methods of the present invention are not limited thereto.
[0025] In view of the problems that traditional crude ammonia water purification devices have a series of problems such as dense filtering materials that are easy to be blocked, large pores and no interception effect, complex equipment, high requirements for on-site management and high energy consumption, the utility model provides a crude ammonia water purification system, which utilizes lime powder to react with crude ammonia water to adsorb impurities in the crude ammonia water and release the organic matter association in the crude ammonia water. The filtering unit deeply purifies the remaining small amount of impurities, effectively avoiding the disadvantages of relying solely on activated carbon and resin adsorption filtration that is easy to saturate and fail. It has the advantages of reducing energy consumption and purification costs, simple and easy implementation of equipment, low requirements for on-site management, improved purification efficiency and green environmental protection.
[0026] See also Figure 1-2 As shown, Figure 1 This is a structural block diagram of the crude ammonia purification system provided by the utility model; Figure 2 It is a structural schematic diagram of a crude ammonia water purification system provided by the utility model.
[0027] A crude ammonia water purification system comprises: a feeder, a slurry reactor, a solid-liquid separator and a filtering unit; wherein the feeder outlet is connected with the feeder outlet of the slurry reactor, and the feeder is used to pour lime powder into the slurry reactor so that the lime powder reacts with the crude ammonia water entering the slurry reactor through the liquid inlet of the slurry reactor to generate a solid-liquid mixture; the input port of the solid-liquid separator is connected with the liquid outlet of the slurry reactor, the first output port of the solid-liquid separator is connected with the input port of the filtering unit, the solid-liquid mixture enters the solid-liquid separator through the liquid outlet of the slurry reactor and the input port of the solid-liquid separator, the solid-liquid separator performs solid-liquid separation on the solid-liquid mixture, the separated liquid phase wastewater enters the filtering unit through the first output port of the solid-liquid separator and the input port of the filtering unit, the filtering unit filters the liquid phase wastewater to obtain ammonia water.
[0028] In a possible implementation, the solid-liquid separator is a horizontal centrifuge. In addition, the solid-liquid separator also includes a second output port, and the second output port of the solid-liquid separator is used to discharge the separated solid-phase impurities. The second output port of the solid-liquid separator is connected to the feed port of a tank truck, and the solid-phase impurities are transported out through the tank truck. The solid-phase impurities are a pale yellow to gray-black paste saturated with impurities, which can be calcined and powdered again for recycling, or delivered for cement production. The sanitary landfill gradually solidifies into a soft rock state of calcium carbonate and gypsum, without subsequent pollution.
[0029] Please continue to see Figure 1-2As shown, in the crude ammonia water purification system provided by the utility model, the feeder includes: a lime silo and a screw conveyor; wherein a star-shaped discharger is provided inside the lime silo, and the star-shaped discharger is used to control the rotation of the star-shaped blades inside the star-shaped discharger to push the lime powder to be discharged from the discharge port of the lime silo; a feed port is provided on the screw conveyor, and the discharge port of the lime silo is connected with the feed port of the screw conveyor, and the discharge port of the screw conveyor is connected with the feed port of the slurry reactor as the discharge port of the feeder, and the lime powder discharged from the discharge port of the lime silo enters the slurry reactor through the discharge port of the screw conveyor and the feed port of the slurry reactor.
[0030] Here, the lime silo and the screw conveyor are integrated, and the overall structure is a "check mark" structure or a pipe structure, wherein the length of the screw conveyor is at least 1.5 meters. A certain amount of lime powder is stored in the upper part of the lime silo, and a star-shaped discharger is installed on the upper part of the lower hopper of the lime silo to prevent lime dust from leaking out and causing pollution. The star-shaped discharger pushes out the lime powder evenly, and the screw conveyor transports the lime powder to the feeding port at the top of the slurry reactor.
[0031] Here, the integrated equipment of the screw conveyor and the lime bin is equipped with an explosion-proof electric control box and a motor. In the specific working process, the explosion-proof electric control box is used to supply power to the motor and the limit sensor respectively, thereby driving the star-shaped blades in the star-shaped discharger to rotate, so as to push the lime powder to be discharged from the discharge port of the lime bin, and to monitor the travel of the conveyor belt of the screw conveyor. When the limit sensor detects that the travel of the conveyor belt of the screw conveyor reaches the preset travel, the explosion-proof electric control box stops supplying power to the screw conveyor, and then the screw conveyor stops conveying lime powder to the slurry reactor.
[0032] Here, a radar level meter is provided on the slurry reactor; the radar level meter is used to monitor the liquid level of the mixed liquid formed by the lime powder and the crude ammonia water in the slurry reactor.
[0033] Here, lime is fire-purified calcium carbonate, which has an indirect burning effect on organic matter when entering water, and calcium ions break colloids, resulting in obvious flocculation. The amount of lime powder added in the slurry reactor is 0.1% to 1% of the amount of crude ammonia water added, and the reaction time of the two in the slurry reactor is 15 minutes to 30 minutes. The specific reaction time can be adjusted according to the actual amount added. The more the amount added, the longer the reaction time.
[0034] Please continue to see Figure 1-2As shown, the filtration unit includes: a first liquid collecting tank, a lifting pump, a filtering booster pump and an activated carbon filter; the input port of the first liquid collecting tank is connected to the first output port of the solid-liquid separator as the input port of the filtration unit, the output port of the first liquid collecting tank is connected to the input port of the lifting pump, the output port of the lifting pump is connected to the input port of the filtering booster pump, the output port of the filtering booster pump is connected to the input port of the activated carbon filter, the output port of the activated carbon filter is connected to the liquid inlet of the liquid storage tank, and the liquid storage tank is used to store ammonia water; the first liquid collecting tank is used to store liquid wastewater, the lifting pump extracts the liquid wastewater in the first liquid collecting tank, and transports the liquid wastewater to the filtering booster pump located at a high place, the filtering booster pump filters the impurities in the liquid wastewater, and pressurizes the filtered liquid to the activated carbon filter, and the activated carbon filter adsorbs and purifies the filtered liquid to obtain ammonia water. In a possible implementation, the first liquid collecting tank is a liquid collecting tank set at a position lower than the filtering booster pump.
[0035] Please continue to see Figure 1-2 As shown, the system also includes: a slurry delivery pump; the liquid inlet of the slurry delivery pump is connected to the liquid outlet of the slurry reactor, and the liquid outlet of the slurry delivery pump is connected to the liquid inlet of the slurry reactor; a first control valve is provided on the liquid inlet of the slurry delivery pump, and the first control valve is used to open or close the liquid inlet of the slurry delivery pump.
[0036] Here, the slurry delivery pump is a screw pump. In a possible implementation, an explosion-proof electric control box is also provided on the slurry delivery pump, and the first control valve is an electric valve. The explosion-proof electric control box supplies power to the electric valve, and the electric valve intelligently opens or closes the liquid inlet of the slurry delivery pump, so that the liquid in the slurry reactor flows into the first liquid collecting tank or returns to the slurry reactor.
[0037] Please continue to see Figure 1-2 As shown, the output port of the activated carbon filter is also connected to the output port of the lifting pump and the liquid inlet of the slurry delivery pump respectively; a second control valve is also provided on the output port of the activated carbon filter, and the purified liquid is released to the output port of the lifting pump, the liquid inlet of the slurry delivery pump or the liquid inlet of the liquid storage tank through the second control valve.
[0038] In a possible implementation, a glass window or color sensor is provided on the output port of the activated carbon filter and the output port of the booster pump so that the technician can check the color of the liquid in the pipe and the turbidity of the liquid. The second control valve is an electric valve; the output port of the booster pump and the liquid inlet of the slurry delivery pump are also provided with electric valves. When it is determined that the liquid in the glass window is clear and transparent (i.e., ammonia water that meets the purification standard, or product-grade ammonia water), the explosion-proof electric control box controls the electric valve to discharge the liquid into the liquid storage tank; when the turbidity of the liquid is low, the liquid is discharged into the filter booster pump for re-adsorption purification until product-grade ammonia water is obtained; when it is determined that the turbidity of the liquid is high, the liquid is returned to the slurry delivery pump for purification until ammonia water that meets the purification standard is obtained.
[0039] Please continue to see Figure 1-2 As shown, the system also includes: a second liquid collecting tank, the water inlet of the second liquid collecting tank is connected to the output port of the lifting pump, the water outlet of the second liquid collecting tank is connected to the input port of the filter booster pump, and the second liquid collecting tank is used to store liquid wastewater discharged from the output port of the lifting pump.
[0040] Here, equipment, pipelines, instruments, and valves must not be made of carbon steel, copper, or zinc to avoid ammonia contamination by related ions. In one possible implementation, the feeder, slurry reactor, solid-liquid separator, first liquid collecting tank, lift pump, filter booster pump, activated carbon filter, and second liquid collecting tank are all made of 316 stainless steel. In another possible implementation, the slurry reactor, solid-liquid separator, first liquid collecting tank, activated carbon filter, and second liquid collecting tank, as well as the corresponding pipelines are made of 304 stainless steel, the outer shell of the lift pump and filter booster pump is made of 316 stainless steel, and the internal material is ceramic and fluoroplastic.
[0041] In a possible implementation, the slurry reactor, the first liquid collecting tank, and the second liquid collecting tank are kept in gas communication to balance the internal gas pressure. When the internal gas pressure is higher than the preset gas pressure, the excess gas desalted water is absorbed and discharged into the flare or boiler air intake system.
[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0043] The above description shows and describes several preferred embodiments of the utility model, but as before, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A crude ammonia purification system, characterized in that: The system comprises: a feeder, a slurry reactor, a solid-liquid separator and a filtering unit; wherein, The discharge port of the feeder is communicated with the feed port of the slurry reactor, and the feeder is used to pour lime powder into the slurry reactor so that the lime powder reacts with the crude ammonia water entering the slurry reactor through the liquid inlet of the slurry reactor to generate a solid-liquid mixture; The input port of the solid-liquid separator is connected to the liquid outlet of the slurry reactor, the first output port of the solid-liquid separator is connected to the input port of the filtration unit, the solid-liquid mixture enters the solid-liquid separator through the liquid outlet of the slurry reactor and the input port of the solid-liquid separator, the solid-liquid separator performs solid-liquid separation on the solid-liquid mixture, the separated liquid wastewater enters the filtration unit through the first output port of the solid-liquid separator and the input port of the filtration unit, the filtration unit filters the liquid wastewater to obtain ammonia water.
2. The crude ammonia purification system according to claim 1, characterized in that: The feeder comprises: a lime bin and a screw conveyor; wherein, A star-shaped discharger is provided inside the lime bin, and the star-shaped discharger is used to control the rotation of star-shaped blades inside the star-shaped discharger to push the lime powder to be discharged from the discharge port of the lime bin; The screw conveyor is provided with a feed port, the discharge port of the lime bin is communicated with the feed port of the screw conveyor, the discharge port of the screw conveyor serves as the discharge port of the feeder and is connected with the feed port of the slurry reactor, and the lime powder discharged from the discharge port of the lime bin enters the slurry reactor through the discharge port of the screw conveyor and the feed port of the slurry reactor.
3. The crude ammonia purification system according to claim 1, characterized in that: The filtering unit comprises: a first liquid collecting tank, a lifting pump, a filtering booster pump and an activated carbon filter; The input port of the first liquid collecting tank is connected to the first output port of the solid-liquid separator as the input port of the filter unit, the output port of the first liquid collecting tank is connected to the input port of the lift pump, the output port of the lift pump is connected to the input port of the filter boost pump, the output port of the filter boost pump is connected to the input port of the activated carbon filter, the output port of the activated carbon filter is connected to the liquid inlet of the liquid storage tank, and the liquid storage tank is used to store the ammonia water; The first liquid collecting tank is used to store the liquid-phase wastewater. The lifting pump extracts the liquid-phase wastewater in the first liquid collecting tank and transports the liquid-phase wastewater to the filtering booster pump located at a high place. The filtering booster pump filters impurities in the liquid-phase wastewater and pressurizes the filtered liquid and transports it to the activated carbon filter. The activated carbon filter adsorbs and purifies the filtered liquid to obtain the ammonia water.
4. The crude ammonia purification system according to claim 3, characterized in that: The system further comprises: a slurry delivery pump; The liquid inlet of the slurry delivery pump is connected to the liquid outlet of the slurry reactor, and the liquid outlet of the slurry delivery pump is connected to the liquid inlet of the slurry reactor; A first control valve is provided on the liquid inlet of the slurry delivery pump, and the first control valve is used to open or close the liquid inlet of the slurry delivery pump.
5. The crude ammonia purification system according to claim 4, characterized in that: The output port of the activated carbon filter is also connected to the output port of the lift pump and the liquid inlet of the slurry delivery pump respectively; A second control valve is also provided on the output port of the activated carbon filter, and the purified liquid is released to the output port of the lift pump, the liquid inlet of the slurry delivery pump or the liquid inlet of the liquid storage tank through the second control valve.
6. The crude ammonia purification system according to claim 1, characterized in that: The slurry reactor is provided with a radar level meter; The radar level meter is used to monitor the liquid level of the mixed liquid formed by lime powder and crude ammonia water in the slurry reactor.
7. The crude ammonia purification system according to claim 3, characterized in that: The system also includes: a second liquid collecting tank, the water inlet of the second liquid collecting tank is connected to the output port of the lifting pump, the water outlet of the second liquid collecting tank is connected to the input port of the filtering booster pump, and the second liquid collecting tank is used to store the liquid wastewater discharged from the output port of the lifting pump.
8. The crude ammonia purification system according to claim 1, characterized in that: The solid-liquid separator further comprises a second output port, and the second output port of the solid-liquid separator is used to discharge the separated solid phase impurities.
9. The crude ammonia purification system according to claim 7, characterized in that: The feeder, the slurry reactor, the solid-liquid separator, the first liquid collecting tank, the lifting pump, the filter booster pump, the activated carbon filter and the second liquid collecting tank are all made of 316 stainless steel.
10. The crude ammonia water purification system according to claim 2, characterized in that: A limit sensor for controlling the opening and closing of the discharge port of the screw conveyor is provided on the discharge port of the screw conveyor.