Device for removing silicon from hydrochloric acid

Abstract

The utility model relates to a hydrochloric acid silica removal device and belongs to the technical field of environmental protection and water treatment. Comprising a raw water tank, a raw water tank liquid level meter, a raw water tank outlet valve, a raw water pump inlet eccentric reducer, a raw water pump, a raw water pump outlet concentric reducer, a raw water pump outlet pressure gauge, a raw water pump outlet check valve, a raw water pump outlet manual valve, a hydrochloric acid dosing pump, a hydrochloric acid dosing point, a pipeline mixer, a pH probe, a sand filter inlet pressure gauge, a sand filter and a sand filter exhaust pneumatic valve, and a trench, a sand filter outlet pressure gauge and a raw water tank liquidometer maintenance manual valve are arranged. The hydrochloric acid silica removal device disclosed by the utility model is small in occupied area, can be mounted on a pipeline, and has the advantages of full contact, efficient mixing and rapid reaction of hydrochloric acid and water and good silica removal effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hydrochloric acid silicon removal device and belongs to the technical field of environmental protection and water treatment. BACKGROUND

[0002] The requirement of the reverse osmosis membrane water inlet to silicon is that the silicon content in the water inlet should not exceed 30mg / L, when no scale inhibitor is added, the highest allowable concentration at the concentrated water end is 120ppm, when some scale inhibitors are used, the concentration can be relaxed to 240ppm. When the silicon content in the raw water is high, the reverse osmosis membrane is frequently fouled, the water quantity decreases fast, and it is difficult to recover after complete cleaning, therefore, the silicon needs to be removed before entering the reverse osmosis.

[0003] The existing method for reducing the silicon scaling of the reverse osmosis includes two kinds: one is to add scale inhibitor to remove silicon, and the other is to add magnesium agent to remove silicon with lime softening. After adding the scale inhibitor, the chelate is generated, the solubility of the silicon dioxide is temporarily improved, and the precipitation of the silicon is alleviated. The deficiency of using the scale inhibitor to remove silicon is that the cost is high due to continuous use, and the use range is limited because it is only suitable for the water with low silicon content. The principle of adding magnesium agent to remove silicon with lime softening is that, under high pH (pH is adjusted by lime), the magnesium agent reacts with the silicon in the water to form the difficultly soluble magnesium silicate precipitate, then, under the coagulant (ferrous sulfate or ferric chloride), the precipitate is generated to remove the silicon in the water and reduce the silicon concentration. The disadvantage of adding magnesium agent to remove silicon with lime softening is that the land occupation is large, the investment is large, the magnesium agent preparation equipment needs to be equipped, the operation cost is high, and the reverse washing, forward washing, sludge discharge and other supporting equipment need to be equipped.

[0004] Therefore, it becomes a technical problem urgently to be solved in the technical field to provide a hydrochloric acid colloidal silicon removal device which has small land occupation, can be installed in the pipeline, has full contact between the hydrochloric acid and the water, has efficient mixing, fast reaction and good silicon removal effect. SUMMARY

[0005] The utility model discloses a kind of hydrochloric acid colloidal silicon removal devices, and land occupation is small, can be installed in the pipeline, hydrochloric acid and water are fully contacted, efficient mixing, fast reaction, silicon removal effect is good.

[0006] To achieve the above object, the technical scheme provided by the utility model is as follows:

[0007] A hydrochloric acid silicon removal device, characterized by comprising a raw water tank, a raw water tank liquid level meter, a raw water tank outlet valve, a raw water pump inlet eccentric variable diameter, a raw water pump, a raw water pump outlet concentric variable diameter, a raw water pump outlet pressure gauge, a raw water pump outlet check valve, a raw water pump outlet hand valve, a hydrochloric acid dosing pump, a hydrochloric acid dosing point, a pipeline mixer, a pH probe, a sand filter inlet pressure gauge, a sand filter, a sand filter exhaust pneumatic valve, a ditch, a sand filter outlet pressure gauge and a raw water tank liquid level meter maintenance hand valve.

[0008] A raw water tank overflow valve is provided on the upper left side of the raw water tank, which is connected to the raw water tank ditch through a pipe. A raw water tank drain valve is provided on the lower left side of the raw water tank. The lower right side of the raw water tank is connected to the raw water tank level gauge through a raw water tank level gauge inspection valve. The right bottom of the raw water tank is connected to one end of the raw water tank outlet valve through a pipe. The other end of the raw water tank outlet valve is connected to one end of the eccentric reducer of the raw water pump inlet, the other end of the eccentric reducer of the raw water pump inlet is connected to the inlet end of the raw water pump, the outlet end of the raw water pump is connected to one end of the concentric reducer of the raw water pump outlet, and the other end of the concentric reducer of the raw water pump outlet is connected to the raw water pump outlet The raw water pump outlet pressure gauge is connected to the raw water pump outlet manual valve through the raw water pump outlet check valve, the other end of the raw water pump outlet manual valve is connected to the pipeline mixer, the pH dosing point is located in front of the pipeline mixer, and the hydrochloric acid dosing pump is connected to the pipeline mixer through the pH dosing point; the pipeline mixer is connected to the pH probe, the pipeline mixer is connected to the sand filter inlet pressure gauge, the sand filter inlet pressure gauge is connected to the sand filter, a sand filter exhaust pneumatic valve is provided on the top of the sand filter, and is connected to the trench through the sand filter exhaust pneumatic valve; the sand filter outlet pressure gauge is set in the middle of the sand filter.

[0009] Preferably, the sand filter is provided with a sand filter backwash air inlet pneumatic valve, a sand filter water inlet pneumatic valve, a sand filter backwash drainage pneumatic valve, a sand filter backwash water inlet pneumatic valve, and a sand filter water production pneumatic valve. The sand filter water inlet pneumatic valve is connected to the sand filter backwash drainage pneumatic valve, and the sand filter backwash drainage pneumatic valve is connected to the ditch through a pipeline; the backwash water is connected to the sand filter backwash water inlet pneumatic valve through a pipeline, the sand filter backwash water inlet pneumatic valve is connected to the sand filter water production pneumatic valve, the sand filter water production pneumatic valve is connected to the sand filter outlet pressure gauge and is connected to the ultrafiltration system through the sand filter outlet pressure gauge; the backwash pump is connected to the sand filter exhaust pneumatic valve through the sand filter backwash air inlet pneumatic valve, and the sand filter exhaust pneumatic valve is connected to the ditch through a pipeline.

[0010] Preferably, the raw water pump: 45m 3 / h, lift H=35m.

[0011] Preferably, the processing capacity of the sand filter is: 45m 3 / h, size: φ3m*4m(H), material: carbon steel lined with rubber.

[0012] Preferably, the pipeline mixer is carbon steel lined with rubber, L=1.5m.

[0013] Preferably, the hydrochloric acid dosing pump has a processing capacity of 6 L / h and a head of 10.2 bar.

[0014] Beneficial effects:

[0015] The hydrochloric acid silicon removal device has small land occupation, can be installed in a pipeline, and has full contact of hydrochloric acid and water, efficient mixing, rapid reaction and good silicon removal effect.

[0016] The utility model is further described below by the drawings and the specific embodiment, but does not mean the limitation of the utility model protection scope. DRAWINGS

[0017] Figure 1 It is the structure schematic view of the hydrochloric acid silicon removal device of the utility model embodiment 1.

[0018] MAIN REFERENCE MARK EXPLANATION:

[0019] 1 raw water tank 2 raw water tank liquid level meter

[0020] 3 raw water tank outlet manual valve 4 raw water pump inlet eccentric variable diameter

[0021] 5 raw water pump 6 raw water pump outlet concentric variable diameter

[0022] 7 raw water pump outlet pressure gauge 8 raw water pump outlet check valve

[0023] 9 raw water pump outlet manual valve 10 hydrochloric acid dosing pump

[0024] 11 hydrochloric acid dosing point 12 pipeline mixer

[0025] 13 pH probe 14 filter inlet pressure gauge

[0026] 15 sand filter 16 sand filter backwash inlet air-operated valve

[0027] 17 sand filter water inlet air-operated valve 18 sand filter backwash drainage air-operated valve

[0028] 19 sand filter backwash water inlet air-operated valve 20 sand filter water production air-operated valve

[0029] 21 sand filter normal washing discharge air-operated valve 22 sand filter exhaust air-operated valve

[0030] 23 ditch 24 sand filter outlet pressure gauge

[0031] 25 raw water tank liquid level meter maintenance manual valve 26 raw water tank overflow valve

[0032] 27 raw water tank blowdown flow DETAILED DESCRIPTION

[0033] Unless specifically stated, in the utility model embodiment, the used parts are all conventional parts available in the market of the technical field, the connection between the parts is conventional connection, and the unit is length unit.

[0034] Embodiment 1

[0035] As Figure 1 shown is the structure schematic diagram of the hydrochloric acid silicon removal device of the utility model embodiment 1, wherein 1 is raw water tank, 2 is raw water tank liquid level gauge, 3 is raw water tank outlet valve, 4 is raw water pump import eccentric variable diameter, 5 is raw water pump, 6 is raw water pump outlet concentric variable diameter, 7 is raw water pump outlet pressure gauge, 8 is raw water pump outlet check valve, 9 is raw water pump outlet hand valve, 10 is hydrochloric acid dosing pump, 11 is hydrochloric acid dosing point, 12 is pipeline mixer, 13 is pH probe, 14 is sand filter import pressure gauge, 15 is sand filter, 16 is sand filter backwash import air pneumatic valve, 17 is sand filter water import pneumatic valve, 18 is sand filter backwash drainage pneumatic valve, 19 is sand filter backwash water import pneumatic valve, 20 is sand filter water production pneumatic valve, 21 is sand filter normal washing discharge pneumatic valve, 22 is sand filter exhaust pneumatic valve, 23 is ditch, 24 is sand filter outlet pressure gauge, 25 is raw water tank liquid level gauge maintenance hand valve;

[0036] The hydrochloric acid silicon removal device of the utility model includes raw water tank 1, raw water tank liquid level gauge 2, raw water tank outlet valve 3, raw water pump import eccentric variable diameter 4, raw water pump 5, raw water pump outlet concentric variable diameter 6, raw water pump outlet pressure gauge 7, raw water pump outlet check valve 8, raw water pump outlet hand valve 9, hydrochloric acid dosing pump 10, hydrochloric acid dosing point 11, pipeline mixer 12, pH probe 13, sand filter import pressure gauge 14, sand filter 15, sand filter backwash import air pneumatic valve 16, sand filter water import pneumatic valve 17, sand filter backwash drainage pneumatic valve 18, sand filter backwash water import pneumatic valve 19, sand filter water production pneumatic valve 20, sand filter normal washing discharge pneumatic valve 21, sand filter exhaust pneumatic valve 22, ditch 23, sand filter outlet pressure gauge 24, raw water tank liquid level gauge maintenance hand valve 25;

[0037] The left upper part of the raw water tank 1 is provided with a raw water tank overflow valve 26 connected with a raw water tank trench through a pipeline, the left lower part of the raw water tank 1 is provided with a raw water tank blowdown valve 27, the right lower part of the raw water tank 1 is connected with a raw water tank liquid level meter 2 through a raw water tank liquid level meter maintenance valve 25, the right bottom of the raw water tank 1 is connected with one end of a raw water tank outlet valve 3 through a pipeline, the other end of the raw water tank outlet valve 3 is connected with one end of a raw water pump inlet eccentric variable diameter 4, the other end of the raw water pump inlet eccentric variable diameter 4 is connected with an inlet end of a raw water pump 5, the outlet end of the raw water pump 5 is connected with one end of a raw water pump outlet concentric variable diameter 6, the other end of the raw water pump outlet concentric variable diameter 6 is connected with a raw water pump outlet pressure gauge 7, the raw water pump outlet pressure gauge 7 is connected with a raw water pump outlet hand valve 9 through a raw water pump outlet check valve 8, the other end of the raw water pump outlet hand valve 9 is connected with a pipeline mixer 12, a pH dosing point 11 is located in front of the pipeline mixer 12, a hydrochloric acid dosing pump 10 is connected with the pipeline mixer 12 through the pH dosing point 11; the pipeline mixer 12 is connected with a pH probe 13, the pipeline mixer 12 is connected with a sand filter inlet pressure gauge 14, the sand filter inlet pressure gauge 14 is connected with a sand filter 15 (specifically connected with a sand filter water inlet pneumatic valve 17 arranged in the sand filter 15), the top of the sand filter 15 is provided with a sand filter exhaust pneumatic valve 22, and is connected with a trench 23 through the sand filter exhaust pneumatic valve 22; a sand filter outlet pressure gauge 24 is arranged in the middle part of the sand filter 15;

[0038] The sand filter 15 is internally provided with a sand filter backwashing air inlet pneumatic valve 16, a sand filter water inlet pneumatic valve 17, a sand filter backwashing water outlet pneumatic valve 18, a sand filter backwashing water inlet pneumatic valve 19 and a sand filter water production pneumatic valve 20, the sand filter water inlet pneumatic valve 17 is connected with the sand filter backwashing water outlet pneumatic valve 18, the sand filter backwashing water outlet pneumatic valve 18 is connected with the trench 23 through a pipeline; backwashing water is connected with the sand filter backwashing water inlet pneumatic valve 19 through a pipeline, the sand filter backwashing water inlet pneumatic valve 19 is connected with the sand filter water production pneumatic valve 20, the sand filter water production pneumatic valve 20 is connected with the sand filter outlet pressure gauge 24 and is connected with an ultrafiltration system through the sand filter outlet pressure gauge 24; a backwashing pump is connected with the sand filter exhaust pneumatic valve 21 through the sand filter backwashing air inlet pneumatic valve 16, and the sand filter exhaust pneumatic valve 21 is connected with the trench 23 through a pipeline;

[0039] The structure of the raw water tank 1: on the ground; size: φ10m*8m (H), material: carbon steel corrosion prevention;

[0040] The specification of the raw water pump 5: 45m 3 / h, head H=35m, manufacturer: Nanfang Pump Industry Co., Ltd.;

[0041] The specification of the sand filter 15: treatment capacity: 45m 3 / h, size: φ2m*4m (H), material: carbon steel lined with rubber;

[0042] Pipe mixer 12: DN100, carbon steel lined rubber, L=1.5m;

[0043] Hydrochloric acid feed pump 10: treatment capacity: 4.5L / h, head: 10.2bar, manufacturer: Milton Roy Industrial Equipment (Shanghai) Co., Ltd.;

[0044] Raw water tank outlet valve 3: DN150, carbon steel lined rubber, manufacturer: Beijing Holi Valve Group Co., Ltd.;

[0045] Raw water pump outlet manual valve 9: DN65, carbon steel lined rubber, manufacturer: Beijing Holi Valve Group Co., Ltd.;

[0046] Raw water tank liquid level meter maintenance manual valve 25: DN50, carbon steel lined rubber, manufacturer: Beijing Holi Valve Group Co., Ltd.;

[0047] Raw water pump inlet eccentric reducer 7 and raw water pump outlet concentric reducer 9: DN65, SS3304;

[0048] Raw water pump outlet pressure gauge 10, sand filter inlet pressure gauge 13, sand filter outlet pressure gauge 23: φ100mm, SS304, manufacturer: Beijing Blythe Instruments and Meters Co., Ltd.;

[0049] Raw water tank liquid level meter 2: DN50, SS304, static pressure liquid level meter, manufacturer: Siemens (China) Co., Ltd.

[0050] Raw water pump outlet check valve 8: DN65, SS304, manufacturer: Beijing Holi Valve Group Co., Ltd.

[0051] pH probe 13: 1-14, 4-20ma, manufacturer: Hebei Koreida Instrument Technology Co., Ltd.

[0052] Sand filter backwash inlet pneumatic valve 16: DN50, carbon steel lined rubber, manufacturer: Shanghai Valve No. 5 Factory Co., Ltd.;

[0053] Sand filter inlet pneumatic valve 17: DN60, carbon steel lined rubber, manufacturer: Shanghai Valve No. 5 Factory Co., Ltd.;

[0054] Sand filter backwash drain pneumatic valve 18: DN125, carbon steel lined rubber, manufacturer: Shanghai Valve No. 5 Factory Co., Ltd.;

[0055] Sand filter backwash inlet pneumatic valve 19: DN125, carbon steel lined rubber, manufacturer: Shanghai Valve No. 5 Factory Co., Ltd.;

[0056] The specification of the sand filter water production pneumatic valve 20 is DN65, the material is carbon steel lined with rubber, and the manufacturer is Shanghai Valve Factory Co., Ltd.

[0057] The specification of the sand filter positive washing discharge pneumatic valve 21 is DN65, the material is carbon steel lined with rubber, and the manufacturer is Shanghai Valve Factory Co., Ltd.

[0058] The specification of the sand filter exhaust pneumatic valve 22 is DN50, the material is carbon steel lined with rubber, and the manufacturer is Shanghai Valve Factory Co., Ltd.

[0059] The hydrochloric acid silicon removal device of the utility model, through adding hydrochloric acid on the pipeline, forming an acidic environment, the silicate in the silicon can react with the hydrogen ion in the hydrochloric acid, generating silicon acid colloid, and then absorbing and filtering through the filter, reducing the silicon content in the water.

[0060] Application Example 1

[0061] The water source of a certain desalination water project is groundwater, and the silicate content in the water is high, with a detection value of 50-60ppm. The reverse osmosis inlet water has a requirement of not higher than 30ppm for silicon.

[0062] Without a silicon removal process, the silicon pollution is very serious during the reverse osmosis operation process, and the water volume decreases by 50% in half a month. The system cannot operate normally, needs to be stopped for cleaning, and the cleaning process is very difficult.

[0063] The hydrochloric acid silicon removal device is used for treatment, and the residence time of 10-20 seconds can be completely reacted, the silicon removal effect is good, the silicon content of the outlet water is less than 30ppm, the reaction efficiency is improved, the silicate content in the water is reduced, and the normal continuous operation of the reverse osmosis is ensured.

[0064] The hydrochloric acid silicon removal device has the following beneficial effects: 1. The hydrochloric acid silicon removal device occupies a small area and can be installed on the pipeline; 2. The hydrochloric acid and water are fully contacted, efficiently mixed, and quickly reacted, and the residence time of 10-20 seconds can be completely reacted without the need to increase a reaction container; 3. The silicon removal effect is good, and the silicon content of the outlet water is less than 30ppm.

[0065] The above only describes the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the technical field can cover the protection scope of the utility model according to the technical scheme and the utility model concept of the utility model or equivalent replacement or change within the technical range disclosed by the utility model.

Claims

1. A hydrochloric acid desilication device, characterized by: The original water tank, the original water tank liquid level meter, the original water tank outlet valve, the original water pump inlet eccentric reducer, the original water pump, the original water pump outlet concentric reducer, the original water pump outlet pressure gauge, the original water pump outlet check valve, the original water pump outlet manual valve, the hydrochloric acid dosing pump, the hydrochloric acid dosing point, the pipeline mixer, the pH probe, the sand filter inlet pressure gauge, the sand filter, the sand filter exhaust pneumatic valve, the trench, the sand filter outlet pressure gauge, the original water tank liquid level meter maintenance manual valve; the left upper part of the original water tank is provided with an original water tank overflow valve connected with the original water tank trench through a pipeline, the left lower part of the original water tank is provided with an original water tank blowdown valve, the right lower part of the original water tank is connected with the original water tank liquid level meter through the original water tank liquid level meter maintenance valve, the right bottom of the original water tank is connected with one end of the original water tank outlet valve through a pipeline, the other end of the original water tank outlet valve is connected with one end of the original water pump inlet eccentric reducer, the other end of the original water pump inlet eccentric reducer is connected with the inlet end of the original water pump, the outlet end of the original water pump is connected with one end of the original water pump outlet concentric reducer, the other end of the original water pump outlet concentric reducer is connected with the original water pump outlet pressure gauge, the original water pump outlet pressure gauge is connected with the original water pump outlet check valve through the original water pump outlet check valve, the other end of the original water pump outlet check valve is connected with the pipeline mixer, the pH dosing point is located in front of the pipeline mixer, and the hydrochloric acid dosing pump is connected with the pipeline mixer through the pH dosing point; the pipeline mixer is connected with the pH probe, the pipeline mixer is connected with the sand filter inlet pressure gauge, the sand filter inlet pressure gauge is connected with the sand filter, and the top of the sand filter is provided with a sand filter exhaust pneumatic valve and is connected with the trench through the sand filter exhaust pneumatic valve; the sand filter outlet pressure gauge is arranged in the middle part of the sand filter.

2. The apparatus for removing silicon from hydrochloric acid according to claim 1, wherein: The sand filter is internally provided with a sand filter backwashing air inlet pneumatic valve, a sand filter water inlet pneumatic valve, a sand filter backwashing water outlet pneumatic valve, a sand filter backwashing water inlet pneumatic valve and a sand filter water outlet pneumatic valve, the sand filter water inlet pneumatic valve is connected with the sand filter backwashing water outlet pneumatic valve, and the sand filter backwashing water outlet pneumatic valve is connected with the trench through a pipeline; backwashing water is connected with the sand filter backwashing water inlet pneumatic valve through a pipeline, the sand filter backwashing water inlet pneumatic valve is connected with the sand filter water outlet pneumatic valve, the sand filter water outlet pneumatic valve is connected with the sand filter outlet pressure gauge and is connected with the ultrafiltration system through the sand filter outlet pressure gauge; the backwashing pump is connected with the sand filter exhaust pneumatic valve through the sand filter backwashing air inlet pneumatic valve, and the sand filter exhaust pneumatic valve is connected with the trench through a pipeline.

3. The apparatus for removing silicon from hydrochloric acid according to claim 2, wherein: The raw water pump has a treatment capacity of 45 m 3 / h, and a lift H=35 m.

4. The apparatus for removing silicon from hydrochloric acid according to claim 3, wherein: The sand filter has a treatment capacity of 45 m 3 / h, with a size of φ2m*4m(H) and a carbon steel rubber lining.

5. The apparatus for removing silicon from hydrochloric acid according to claim 4, wherein: The pipeline mixer is made of carbon steel lined with rubber, and L is 1.5 m.

6. The apparatus for removing silicon from hydrochloric acid according to claim 5, wherein: The hydrochloric acid dosing pump has a treatment capacity of 4.5 L / h and a head of 10.2 bar.

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