This scheme is designed according to the boiler water requirement of Limited Company. Considering the poor water quality and high turbidity of raw water, which is 50~80mg/l, the main process of this system adopts quartz sand filtration and softening.
Water output of filter: ≥4m3/h
Water output of sodium ion exchanger: ≥4m3/h (continuous water output 4t/h)
Raw water quality: river water (hardness1.5 mmol/l; Turbidity 50 ~ 80 mg/L)
Production water: make-up water for low-pressure boilers.
Control mode: microcomputer automatic control.
The water hardness of this system is ≤0.03mmol/L (meeting the water inlet requirements of low-pressure boilers stipulated by the state).
Second, the system flow and description
2. 1 process flow
According to the raw water quality and user's water requirements, the design system technology is as follows:
raw water pump
quartz sand filter
Sodium ion exchanger
Backwash water pump
Salt-liquid system
boiler room
Soft water tank
river water
2.2 system description
2.2. 1 mechanical filter
Mechanical filter, also known as pressure filter, is an important part of pretreatment and water purification system in soft water preparation. According to different filter media, it can be divided into quartz sand filter, multi-media filter, activated carbon filter, manganese sand filter and fiber ball filter.
The system adopts multi-media filter as pretreatment equipment of water treatment system, aiming at removing mud, sand, suspended matter, particles and colloid in water, reducing turbidity and SDI value of influent, and meeting the influent requirements of subsequent equipment; The equipment can recover its pollution interception ability through regular cleaning. The multi-media filter materials in the filter are high-quality homogeneous quartz sand and anthracite, which are scientifically and orderly distributed in the filter pool according to the specific gravity and particle size. For example, anthracite with small specific gravity and slightly larger particle size is placed at the top of the filter bed, quartz sand with moderate specific gravity and small particle size is placed at the middle of the filter bed, and gravel with large specific gravity and large particle size is placed at the bottom of the filter bed. This ratio ensures that the filter will not produce layer disorder during backwashing, thus ensuring the interception ability of the filter material.
At the same time, the filter bed gradually intercepts impurities in the water, so that all layers of filter materials in the pool can be fully and evenly utilized, and the filter layers are effectively increased, thus prolonging the service life of the filter materials and reducing the operating cost of the equipment. The filter performs backwashing and forward washing operations according to the water quality of the influent. Through backwashing, the impurities trapped in the gap between filter materials are washed away, and then positive flushing is carried out to stabilize the filter material layer and restore its filtration efficiency.
2.2.3 Fully automatic sodium ion exchanger
Softening and regeneration principle
Sodium ion exchanger is equipped with 00 1×7FC floating bed strong acid cation resin, which is used as softened water exchanger. When raw water enters the exchange layer from bottom to top, sodium ions on the exchange layer replace calcium and magnesium ions in the raw water to soften the water;
Ca2++2NaR CaR2+2Na+
Mg2++2NaR MgR2+2Na+
After water is exchanged by sodium ions, calcium and magnesium ions in water are replaced by sodium ions, so the hardness in water is removed, while the alkalinity remains unchanged.
After sodium ion exchange resin failed, in order to restore its exchange capacity, industrial salt solution was used for regeneration. Regeneration means that a certain concentration of brine passes through the exchanger layer from top to bottom, and the sodium ions in the brine reversely displace the calcium and magnesium ions on the exchanger, and the calcium and magnesium ions and their compounds are washed out of the exchanger with softened water, so as to regenerate the exchanger and restore its exchange capacity. The reaction principle is as follows:
Calcium R2+2Na+ 2NaR+ Ca2+
Magnesium R2+2Na+ 2NaR+ Mg2+
Third, the water pump
3. 1 raw water pump (provided by users)
Provide necessary operating pressure for the system.
Technical specifications:
project
unit
data
Reserve bill
Quantity of equipment
platform
1
cast iron
rated flow
Cubic meter/hour
six
Rated lift
mH2O
30
Pumping medium
river water
Temperature of conveying medium
standard temperature
Installation position
interior
3.2 backwashing water pump (provided by users)
Provide necessary operating pressure for backwashing water of the filter. Clear water is used for backwashing.
Technical specifications:
project
unit
data
comment
Quantity of equipment
platform
1
cast iron
rated flow
Cubic meter/hour
15
Rated lift
mH2O
20
Pumping medium
Clean water
Temperature of conveying medium
normal atmospheric temperature
Installation position
inside
3.3, control system
This system adopts the microcomputer automatic control of LCD screen designed by our company.
The start and stop of all equipment are controlled by the liquid level signal of the water tank. When the water level of the water tank is high, the equipment and the water inlet pump automatically stop; When the water level is low, start the water inlet pump and the corresponding equipment will run automatically.
Four, automatic filter main performance indicators:
1) model QL-4 vertical cylinder type
2) The number of equipment is 1.
3) Equipment diameter DN700 mm
4) The design pressure is 0.5 MPa and the test pressure is 0.8MPa.
5) The equipment output is 3-5 t/h, and the maximum output is 5 t/h.
6) the operating pressure is 0.2 ~ 0.3 MPa
7) the inlet water temperature is 5 ~ 50℃
8) The operating flow is10 ~12m/h.
9) The filter head loss is 0.02 ~ 0.65438±0 MPa.
10) cleaning operation pressure is 0.05 ~ 0. 1 MPa.
1 1) sewage interception capacity (filter material) 10 ~ 20kg/m3.
12) backwashing strength12 ~15l/m2 s
13) backwashing water pressure is 0.2 ~ 0.3 MPa.
14) failure, the inlet and outlet pressure difference is ≤0. 1 MPa.
15) quartz sand height1100 mm.
16) overall dimensions? 700× 2500mm
17) steel plate material Q235A carbon steel corrosion protection
18) pipeline material steel anticorrosion, with related valves and pressure gauges.
19) The cylinder thickness is 5mm.
20) Head thickness is 6mm.
2 1) influent turbidity ≤ 50mg/L
22) effluent turbidity ≤ 5mg/L.
23) Internal equipment:
Water inlet and water distribution type special water distributor
Type of water outlet device: dome plate thickness: 20 mm.
24) External devices of equipment body:
Equipment manhole diameter:? 400mm quantity: 2 pieces
Specification of equipment peephole (length/width): 220×50mm Quantity: 2.
Mirror material: plexiglass mirror thickness: 15mm
25) Equipment ontology interface:
Inlet and outlet flanges dn = 50mm pn =1.0mpa.
Backwashing inlet and outlet flanges dn = 65mm pn =1.0mpa.
Cleaning the outlet flange DN=50mm PN= 1.0MPa.
Drainage flange dn = 25mm pn =1.0mpa.
Exhaust flange dn = 32mm pn =1.0mpa.
Import and export sampling valve dn =15mm pn =1.0mpa.
29) Total equipment weight:1000 kg; Working weight: 2800kg.
Verb (abbreviation of verb) Main performance indexes of sodium ion exchanger:
Flow rate: 3-5 m3/h Equipment material: 304 stainless steel.
Overall dimension: 1450×400 ×2280 Cylinder diameter: Ф 250 (two rows)
Running flow rate: 30-50m/h Packing: 00 1×7FC cationic resin.
Resin height: 1600 mm Working cycle: 12- 15h.
Regeneration time: 15-20 minutes; Cleaning time: 20-25 minutes.
Regeneration flow: 5m/h Cleaning flow: 12- 15m/h
Working pressure: 0.2-0.3 MPa; Test pressure: 0.6 MPa.
Working temperature: 5-40℃, salt consumption ≤70g/mol.
Resin loading:150kg (particle size range 0.6-1.25mm).
Resin loss rate:
Self-consumption:
Quantity: 1 set Control mode: automatic
Regenerated salt solution concentration: 8- 10% Inlet water quality: calcium and magnesium content < 8 mmol /l L.
Foundation load: 1.5t Effluent water quality: hardness: < 0.03mmol/L.
★ Description of equipment structure:
2- 1- 1.304 service life of stainless steel equipment ≥ 15. The salt-containing tank of 304 stainless steel sodium ion exchanger is a cylindrical container welded with steel, and the body material is 304 stainless steel. All main welds are automatically welded by submerged arc welding. The inside of the salt tank is also coated with epoxy resin for double anticorrosion. 304 stainless steel equipment steel plate head thickness 3mm cylinder! The pipeline adopts UPVC system, and the connection mode of inlet and outlet pipes and other pipelines adopts standard flange connection. The pressure resistance of the pipeline system shall not be lower than 1.6 MPa.
2- 1-2. The water distributor at the top of the equipment is a 304 stainless steel honeycomb water distributor with flange connection, and the lower part is an ABS water cap.
2- 1-3. There are 1 peepholes on the equipment body, and there are resin outlets on the equipment body.
2- 1-4. The program controller meets the normal operation of the switch, and the live circuit can withstand 2000V AC voltage 1 min without breakdown and flicker; The insulation resistance between the live circuit and the shell is greater than 1mω.
2- 1-5. When the equipment fails during operation, "beep!" Sound the alarm.
(1) technical characteristics and unique process: Our F series automatic water softener (sodium ion exchanger) absorbs the characteristics of fixed bed on the basis of fixed bed, moving bed, floating bed and imported equipment, with high exchange capacity of moving bed, large output of floating bed, good effluent quality, small size of imported equipment and high degree of automation. It overcomes many shortcomings of moving bed and fixed bed exchangers, such as large consumption, fast wear, low exchange capacity, high unit consumption of regenerant, large volume, complicated operation, high failure rate, floating bed easy to be stratified, difficult to control the effluent end point, unable to stop frequently, low adaptability of imported equipment to raw water, and easy blockage of salt solution system. Combined with different water quality conditions in different parts of China, after repeated practice and demonstration, it has been successfully developed into a high-tech energy-saving patented product, and the whole machine has realized one use and one standby.
(2) High degree of automation and simple operation. The equipment adopts a unique computer to control the rotation of the valve plate of the multifunctional plane integrated valve (patented technology), which realizes automatic switching, regeneration and cleaning without manual operation, and can be semi-automatic or manual if necessary. The microcomputer is equipped with communication protocol connection, which can realize upper control. Xinyuan patented multifunctional flat valve has a warranty period of 5 years! If it needs to be replaced for more than 5 years, it will be supplied at cost price!
(3) The exchange system adopts two exchange columns, and the plane integrated valve automatically switches and regenerates the uninterrupted water production, so that the continuous water production completely reaches 5t/h..
(4) The salt solution system adopts unique automatic salt supply technology and automatic dilution technology, and does not need auxiliary facilities such as salt pond, salt pump and agitator.
(5) The unique salt filtering technology is adopted to ensure that the salt supply system is not blocked, so that the regenerated liquid can regenerate the invalid resin with good quality and quantity, and ensure the quality of water production.
(6) It has wide adaptability to inlet water quality, and the raw water with hardness ≤8mmol/L can be softened to 0.03mmol/L below the national standard low-pressure boiler.
(7) Using floating bed and countercurrent regeneration technology, the effect of energy saving and consumption reduction is remarkable. Compared with the traditional exchanger, it can save 30% salt, 50% electricity, 30% water and 20% resin.
(8) The equipment belongs to split combined equipment, and the whole set of equipment is divided into two parts: exchange system and regeneration system, which can be arranged and installed at right angles according to the front, back, left, right or two parts of the user's site, and is not limited by the site.
The core patented technology of intransitive verb filtering and softening equipment-multifunctional flat valve
6. 1, Brief Introduction of Plane Valve
1. The valve body and spool of the plane valve are combined by plane rotation, which completely solves the leakage caused by the rotating wear of the valve curved surface. With the increase of service time, the better the sealing performance and the longer the service life.
2. The plane valve is made of PVC material, which is corrosion-resistant, with large opening and large circulation area. The valve, water cover and resin will not be blocked by dirty water, and it is made by hand and labyrinth design, which ensures the stability of the effluent.
3. In the same kind of flat valve, it is the only automatic head designed to use the pressure-free operation seal, which can ensure the stability of normal use for 5-8 years, without operation failure, and its service life exceeds 10- 15 years, greatly reducing the maintenance and repair after use.
4. In the same plane valve, the bonding depth between the valve and the external pipeline is only more than 30mm, which ensures the pipeline to fall off and leak during use.
5. The valve body is threadedly bonded with the valve body, which enhances the bonding strength and prevents the valve body from delaminating.
6. Self-made PE sealing ring is adopted between holes of the plane valve, which has a smooth surface and is easy to seal, thus enhancing the wear resistance, thus ensuring that the damage of the sealing ring will not cause the valve core to be scratched.
(Multifunctional flat valve ensures stable operation for 5-8 years)
Based on the above characteristics and practice, it is proved that the multifunctional plane valve replaces all manual valves and pneumatic/electric valves, and adopts the plane valve structure in the water treatment system, which greatly reduces the investment cost.
6.2, the operation of the plane valve and