CN107973503B - Integrated granular sludge sulfurization decalcification device and method - Google Patents
Integrated granular sludge sulfurization decalcification device and method Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F11/00—Treatment of sludge; Devices therefor
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- C02F11/00—Treatment of sludge; Devices therefor
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Abstract
The invention discloses an integrated granular sludge vulcanization decalcification device and method. The main body of the device consists of a sludge collecting area, a water distributing area, a decalcification area, a vulcanization area and a circulation area. The mud collecting area is provided with a mud collecting chamber and a mud guide pipe; the water distribution area is provided with a water inlet pipe and a water distribution chamber; the decalcification area is provided with a granular sludge chamber and a precipitation separation chamber; the vulcanizing area is provided with an air supply chamber, a sulfur particle bed and an annular acid storage chamber; the circulating area is provided with an acid liquor circulating system and a mixed liquid circulating system. The continuous production of sulfuric acid is realized through the action of a vulcanization zone; the continuous dissolution of calcium carbonate is realized through the action of the decalcification area; the sulfuric acid solution is recycled under the action of a circulation area; and the output of the decalcified granular sludge is realized through the action of the sludge collection area. The invention integrates the sulfuration acidogenesis and the granular sludge decalcification into a whole, and the device has compact structure; sulfuration bacteria are used for producing acid, the cost is low, and the sulfuration bacteria can oxidize the monomer sulfur into sulfuric acid only by aerating the sulfur granule bed; the acid liquor is used for dissolving and decalcifying, the acid amount is controllable, and the damage of granular sludge can be reduced.
Description
Technical Field
The invention relates to a granular sludge decalcification device, in particular to an integrated granular sludge vulcanization decalcification device and method.
Background
A large amount of organic wastewater is discharged in human life and production activities, which causes serious pollution to lakes, rivers, offshore water bodies and other water bodies in China. As a class of economic and efficient wastewater treatment technologies, UASB, EGSB and IC reactors are widely applied to organic wastewater treatment. Organic waste water, especially industrial organic waste water, generally contains calcium. During anaerobic biological treatment, organic contaminants are converted to carbon dioxide, which combines with calcium to produce calcium carbonate, which is distributed inside and on the surface of the granular sludge and can affect activity by affecting mass transfer. The calcified granular sludge is accumulated in the reactor, which not only reduces the effective volume of the device and increases the cost of anaerobic digestion engineering, but also limits the application of anaerobic digestion technology.
Anaerobic granular sludge is a natural aggregate of anaerobically digested microorganisms, and the effectiveness of UASB, EGSB and IC reactors is closely related to the activity of anaerobic granular sludge. Prevent anaerobic granular sludge calcification, promote calcification anaerobic granular sludge decalcification, be favorable to keeping anaerobic granular sludge's function undoubtedly, the continuous operation of helping hand high efficiency anaerobic reactor. So far, the main means for dealing with the calcification of granular sludge in engineering is to carry out chemical calcium removal pretreatment on wastewater or increase the replacement frequency of calcified granular sludge in a reactor, wherein the former needs to add a large amount of medicament, and the latter needs to supplement a large amount of high-efficiency sludge, so that the cost is high. The development of an economical and effective method for preventing and removing calcium from granular sludge becomes an urgent priority for guaranteeing the development of anaerobic digestion technology. The invention takes cheap bulk sulfur granules as materials, produces sulfuric acid through biological vulcanization, and then dissolves calcium carbonate with the sulfuric acid, the acid production amount is controllable, the decalcification product is pollution-free, the treatment process is low in cost, and the invention has good popularization and application prospects.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an integrated granular sludge vulcanization decalcification device. The invention adopts the following specific technical scheme:
the integrated granular sludge sulfurization decalcification device comprises a device main body which is sequentially divided into a sludge collecting area, a water distribution area, a decalcification area and a sulfurization area from bottom to top, wherein a circulation area is independent of the device main body and is used for communicating the water distribution area with the decalcification area and communicating the water distribution area with the sulfurization area; the mud collection area is sequentially connected with a mud guide water pump, a water stop valve and the bottom of the inverted cone-shaped mud collection chamber from bottom to top through a mud guide pipe; the water distribution area is provided with a water inlet pipe and a water distributor from bottom to top, and the water inlet pipe is provided with a water inlet pump; the side wall of the decalcification area is provided with a plurality of pH detection ports, the decalcification area is divided into a granular sludge decalcification reaction chamber and a precipitation separation chamber from bottom to top, a mud-water separator is arranged above the precipitation separation chamber, and the side wall of the device above the mud-water separator is provided with a water outlet pipe with a control valve; the bottom of the vulcanization zone is separated from the decalcification zone through a porous filter plate, the middle part of the vulcanization zone is wrapped by a cylindrical outer wall to form a sulfur granule bed, the bottom of the outer wall of the sulfur granule bed is sealed with the inner wall of the device main body through an annular water baffle plate, the bottom of the sulfur granule bed is provided with an air supply device consisting of an air supply pipe and a tubular microporous aeration head, a porous bottom plate for supporting sulfur granules is arranged in the sulfur granule bed, a headspace chamber is arranged above the sulfur granule bed, and the headspace chamber is communicated with a tail gas pipe for discharging tail gas; the periphery of the sulfur particle bed is wrapped with an annular acid storage chamber which is used for collecting sulfuric acid solution overflowing from the sulfur particle bed; the circulation zone is provided with an acid liquor return pipe, an acid liquor reflux pump, a mixed liquor return pipe and a mixed liquor reflux pump, the upper part of the decalcification zone returns to the water distribution zone through the mixed liquor return pipe and the mixed liquor reflux pump, and the annular acid storage chamber is introduced into the water distribution zone through the acid liquor return pipe and the acid liquor reflux pump.
The scheme can further adopt the following preferred modes:
the volume ratio of the sludge collection zone, the water distribution zone, the decalcification zone to the vulcanization zone is 1-1.5: 1: 8-10: 1.5 to 2.
The bottom of the annular acid storage chamber is level to the porous bottom plate of the sulfur particle bed, and the height of the acid liquid in the acid storage chamber is controlled to be 10-20% of the height of the sulfur particle bed; the volume ratio of the sulfur particle bed to the annular acid storage chamber is 1:0.8 to 1.
The volume ratio of the granular sludge decalcification reaction chamber to the precipitation separation chamber in the decalcification area is 1:0.3 to 0.4; the included angle between the baffle of the mud-water separator and the side wall of the device main body is 30-40 degrees; the vertical distance between the water outlet pipe in the precipitation separation chamber and the top of the decalcification area is 5-10 cm; three pH detection ports are arranged in the decalcification area along the height direction at equal intervals, and the vertical distance between the pH detection port at the bottom end and the water inlet pipe is 15-20 cm.
The vertical distance between the liquid inlet end of the acid liquid return pipe and the bottom of the vulcanization area is 5-10 cm; the vertical distance between the liquid inlet end of the mixed liquid return pipe and the top of the decalcification area is 10-15 cm.
The height-diameter ratio of the whole granular sludge vulcanization decalcification device is 5-7: 1, the height-diameter ratio of the sludge collection area to the water distribution area to the vulcanization area is 0.5-1: 1, the height-diameter ratio of the decalcification area is 3-4: 1.
the bottom angle of the inverted cone-shaped sludge collection chamber is 50-70 degrees; the vertical distance between the water inlet pipe and the top of the chamber is 5-10 cm; the vertical distance between the liquid outlet ends of the acid liquid return pipe and the mixed liquid return pipe and the water inlet pipe is 5-10 cm.
The sulfur particle bed can be filled with elemental sulfur particles, and the decalcification area can be filled with granular sludge.
And an overflow weir is arranged at the top of the outer wall of the sulfur particle bed.
A method for vulcanizing and decalcifying granular sludge by using the device comprises the following steps:
opening a water stop valve, pumping calcified granular sludge into a decalcification area of the reactor through a sludge guide pipe by using a sludge guide pump, and closing the water stop valve; the water inlet pump sets a flow value for water inlet, and when the liquid level in the device continuously rises to the top of the decalcification area, the flow value of the water inlet is adjusted to ensure that the liquid level slowly rises and enters the vulcanization area through the porous filter plate; the gas pipe starts aeration and enters the sulfur granule bed through the tubular microporous aeration head, acid production starts in the sulfur granule bed, sulfuric acid liquid flows into the annular acid storage chamber through the overflow weir and is continuously accumulated, when the liquid level of the acid storage chamber reaches the upper limit of the height of the control liquid level, the aeration is stopped, and the water inlet pump is closed; opening the mixed liquid reflux pump and the acid liquid reflux pump, and closing the acid liquid reflux pump when the liquid level in the acid storage chamber reaches the lower limit of the control liquid level height; and (3) keeping the mixed liquid to flow back to enable sulfuric acid liquid to be used for multiple times, continuously carrying out acid pickling and decalcification in the decalcification area, after multiple times of circulating cleaning, closing the mixed liquid reflux pump, opening the water inlet pump and the water outlet pipe control valve, discharging the mixed liquid after acid pickling, discharging the granular sludge after decalcification through the sludge guide pipe, and continuing the next cycle.
Compared with the prior art, the invention has the following beneficial effects: 1. the sulfuration acid production and the granular sludge decalcification are integrated, the device has compact structure, convenient decalcification operation and convenient popularization and use; 2. sulfureted bacteria are used for producing acid, the cost is low, and the sulfureted bacteria can oxidize the singlet oxygen into the sulfuric acid only by aerating the sulfur granule bed; 3. the acid liquor is used for dissolving and decalcifying, the acid amount is controllable, and the damage to the granular sludge can be reduced.
Drawings
FIG. 1 is a structural diagram of an integrated granular sludge sulfurization decalcification apparatus;
FIG. 2 is a top view of the water distribution region.
In the figure: the device comprises a mud collection area I, a water distribution area II, a decalcification area III, a vulcanization area IV, a circulation area V, a mud guide water pump 1, a mud guide pipe 2, a water stop valve 3, an inverted cone-shaped mud collection chamber 4, a pH detection port 5, a water distributor 6, a granular sludge decalcification reaction chamber 7, a precipitation separation chamber 8, a mud-water separator 9, a water baffle 10, a gas pipe 11, a tubular microporous aeration head 12, a porous bottom plate 13, a sulfur particle bed 14, an overflow weir 15, a headspace chamber 16, a tail gas pipe 17, an acid storage chamber liquid level control height line 18, an annular acid storage chamber 19, a porous filter plate 20, a control valve 21, a water outlet pipe 22, a mixed liquid reflux pipe 23, an acid reflux pipe 24, an acid reflux pump 25, a mixed liquid reflux pump 26, a water inlet pipe 27 and a water inlet water pump 28.
Detailed Description
The invention will be further elucidated and described with reference to the drawings and specific embodiments.
As shown in fig. 1 and 2, in the integrated granular sludge sulfurization decalcification apparatus, an apparatus main body is sequentially divided into a sludge collection zone i, a water distribution zone ii, a decalcification zone iii and a sulfurization zone iv from bottom to top, and a circulation zone v is independent of the apparatus main body and is used for communicating the water distribution zone ii with the decalcification zone iii and the water distribution zone ii with the sulfurization zone iv. The concrete structure of each part is as follows: the mud collection area I is sequentially connected with a mud guide water pump 1, a water stop valve 3 and the bottom of an inverted cone mud collection chamber 4 from bottom to top through a mud guide pipe 2. The water distribution area II is provided with a water inlet pipe 27 and a water distributor 6 from bottom to top, and the water inlet pipe 27 is provided with a water inlet pump 28. Three pH detection ports 5 are equidistantly arranged on the side wall of the decalcification area III, the decalcification area III is divided into a granular sludge decalcification reaction chamber 7 and a precipitation separation chamber 8 from bottom to top, a mud-water separator 9 is arranged above the precipitation separation chamber 8, and a water outlet pipe 22 with a control valve 21 is arranged on the side wall of the vulcanization decalcification device above the mud-water separator 9. The bottom of the vulcanization area IV is separated from the decalcification area III through a porous filter plate 20, and the middle of the vulcanization area IV is wrapped by a bottomless uncovered cylindrical outer wall to form a sulfur particle bed 14. Elemental sulfur particles are filled in the sulfur particle bed 14, and granular sludge is filled in the decalcification area III. The bottom of the outer wall of the sulfur granule bed 14 is sealed with the inner wall of the device main body by an annular water baffle plate 10, so that water below the water baffle plate 10 enters the sulfur granule bed 14 under the guidance of the water baffle plate 10; the bottom of the sulfur particle bed 14 is provided with an air supply device consisting of an air pipe 11 and a tubular microporous aeration head 12, a porous bottom plate 13 for supporting sulfur particles is arranged in the sulfur particle bed 14, a headspace chamber 16 is arranged above the sulfur particle bed 14, and the headspace chamber 16 is communicated with a tail gas pipe 17 for discharging tail gas; the top of the outer wall of the sulfur granule bed 14 is provided with an overflow weir 15, the periphery of the sulfur granule bed 14 is wrapped with an annular acid storage chamber 19 for collecting sulfuric acid solution overflowed from the sulfur granule bed 14, and the annular acid storage chamber 19 can be formed by clamping the outer wall of the sulfur granule bed 14 and the inner wall of the device main body. The circulation zone V is provided with an acid liquor return pipe 24, an acid liquor return pump 25, a mixed liquor return pipe 23 and a mixed liquor return pump 26, the upper part of the decalcification zone III returns to the water distribution zone II through the mixed liquor return pipe 23 and the mixed liquor return pump 26, and the annular acid storage chamber 19 is connected into the mixed liquor return pipe 23 through the acid liquor return pipe 24 and the acid liquor return pump 25 and is distributed to the decalcification zone III through the water distributor 6.
In addition, in the above apparatus, the parameters of the respective components may be set as follows: the volume ratio of the sludge collection zone I, the water distribution zone II, the decalcification zone III to the vulcanization zone IV is 1-1.5: 1: 8-10: 1.5 to 2. The bottom of the annular acid storage chamber 19 is level with the porous bottom plate 13 of the sulfur particle bed, the height of the acid liquid in the acid storage chamber is controlled to be 10-30% of the height of the sulfur particle bed, and a liquid level control height line 18 of the acid storage chamber can be preset for convenient control. The ratio of the volume of the sulfur particle bed 14 to the annular acid storage chamber 19 is 1:0.8 to 1. The volume ratio of the granular sludge decalcification reaction chamber 7 to the precipitation separation chamber 8 in the decalcification area III is 1:0.3 to 0.4; the included angle between the baffle of the mud-water separator 9 and the side wall of the device main body is 30-40 degrees; the vertical distance between the water outlet pipe 22 in the precipitation separation chamber 8 and the top of the decalcification area III is 5-10 cm; the vertical distance between the pH detection port 5 at the bottommost end of the decalcification area III and the water inlet pipe 27 is 15-20 cm. The vertical distance between the liquid inlet end of the acid liquid return pipe 24 and the bottom of the vulcanization area IV is 5-10 cm; the vertical distance between the liquid inlet end of the mixed liquid return pipe 23 and the top of the decalcification area III is 10-15 cm. The vertical distance between the tubular microporous aeration head 12 and the porous bottom plate 13 is 5-10 cm, and the vertical distance between the porous filter plate 20 and the gas delivery pipe is 5-10 cm. The height-diameter ratio of the whole granular sludge vulcanization decalcification device is 5-7: 1, the height-diameter ratio of the sludge collection area I, the water distribution area II and the vulcanization area IV is 0.5-1: 1, the height-diameter ratio of the decalcification area III is 3-4: 1. the bottom angle of the inverted cone-shaped sludge collection chamber 4 is 50-70 degrees; the vertical distance between the water inlet pipe 27 and the top of the chamber is 5-10 cm; the vertical distance between the liquid outlet ends of the acid liquid return pipe 24 and the mixed liquid return pipe 23 and the water inlet pipe 27 is 5-10 cm.
According to the invention, oxygen is supplied by aeration in a vulcanization zone IV, sulfur is oxidized into sulfuric acid by utilizing vulcanized bacteria, and the sulfuric acid is stored in an annular acid storage chamber 19; and pumping sulfuric acid solution into the water distribution area II by virtue of an acid solution circulating system, and refluxing mixed solution in the decalcification area III by virtue of a mixed solution circulating system to remove calcium carbonate in and on the surface of the granular sludge by virtue of the acid solution so as to recover the mass transfer capacity of the granular sludge. The main system of the invention works as follows:
the sulfuration area IV is an acid production system and mainly comprises a porous filter plate 20, a water baffle plate 10, a gas conveying pipe 11, a tubular microporous aeration head 12, a porous bottom plate 13, a sulfur granule bed 14, an annular acid storage chamber 19, an overflow weir 15, a headspace chamber 16 and a tail gas pipe 17. The water flow rising in the decalcification area III enters the sulfur granule bed 14 through the porous filter plate 20, the air enters the sulfur granule bed 14 through the air delivery pipe 11 and the tubular microporous aeration head 12, and under the condition of sufficient oxygen supply, the sulfureted bacteria convert the elemental sulfur in the sulfur granule bed 14 into sulfuric acid. The generated acid liquid flows into the annular acid storage chamber 19 through the overflow weir 15, an acid liquid return pipe 24 is arranged at the bottom of the annular acid storage chamber 19, and the acid liquid return pipe 24 is used for communicating the water distribution area II and the vulcanization area IV.
The decalcification area III is a granular sludge decalcification system and mainly comprises a granular sludge decalcification reaction chamber 7, a pH detection port 5, a precipitation separation chamber 8, a sludge-water separator 9 and a water outlet pipe 22. The returned sulfuric acid solution and the mixed solution uniformly enter a granular sludge decalcification reaction chamber 7 through a water distributor 6 for decalcification reaction, and a precipitation separation zone 8 for mud-water separation. The mixed liquid after multiple acid washing is discharged through the water outlet pipe 22, and a pH detector can be arranged in the pH detection port 5 and used for monitoring the pH value to reflect the working state of the decalcification system.
The water distribution area II is a liquid uniform mixing system and mainly comprises a water inlet pipe 27 and a water distributor 6. The returned sulfuric acid solution and the mixed solution are connected with a water distributor 6, enter a decalcification area III through the water distributor 6, and ensure that the pH value of the acid solution entering the decalcification area is controlled within a range which can not only remove calcium but also can not damage granular sludge through the flow regulation of a reflux pump.
The sludge collection area I is an input and output system of granular sludge. Mainly comprises a mud guide water pump 1, a water stop valve 3, a mud guide pipe 2 and an inverted cone-shaped mud collection chamber 4. The calcified granular sludge is pumped into the reactor through the sludge guide pipe 2, and the water stop valve 3 is closed; after the granular sludge is decalcified, the water stop valve 3 is opened, and the granular sludge is discharged through the sludge guide pipe 2 by using the sludge guide water pump 1.
The circulation zone V is an acid liquor recycling system and mainly comprises an acid liquor return pipe 24, an acid liquor return pump 25, a mixed liquor return pipe 23 and a mixed liquor return pump 26. The acid liquid return pipe 24 is used for communicating the water distribution area II with the vulcanization area IV, and the mixed liquid return pipe 22 is used for communicating the water distribution area II with the decalcification area III.
Based on the device, the invention also provides an integrated granular sludge sulfurization decalcification method, which comprises the following steps:
opening a water stop valve 3, pumping calcified granular sludge into a decalcification area III of the reactor through a sludge guide pipe 2 by using a sludge guide water pump 1, and closing the water stop valve 3; the water inlet pump 28 sets a flow value for water inlet, and when the liquid level in the device continuously rises to the top of the decalcification area III, the flow value of the water inlet is adjusted to ensure that the liquid level slowly rises and enters the vulcanization area IV through the porous filter plate 20; the gas pipe 11 starts aeration and enters the sulfur granule bed 14 through the tubular microporous aeration head 12, acid production starts in the sulfur granule bed 14, sulfuric acid liquid flows into the annular acid storage chamber 19 through the overflow weir 15 and is continuously accumulated, when the liquid level of the acid storage chamber reaches the upper limit of the control liquid level (about 20-30% of the height of the sulfur granule bed), the aeration is stopped, and the water inlet pump 28 is closed; the mixed liquid reflux pump 26 and the acid liquid reflux pump 25 are opened, and the acid liquid reflux pump 25 is closed when the liquid level in the acid storage chamber 19 reaches the lower limit of the height of the control liquid level (about 10-15% of the height of the sulfur particle bed); and (3) keeping the mixed liquor to flow back to enable the sulfuric acid liquor to be used for multiple times, continuously carrying out acid pickling and decalcification in the decalcification area III, after multiple times of circulating cleaning, closing the mixed liquor reflux pump 26, opening the water inlet pump 28 and the water outlet pipe control valve 21, discharging the mixed liquor after acid pickling, discharging the granular sludge after decalcification through the sludge guide pipe 2, and continuing the next cycle.
Claims (8)
1. The utility model provides an integral type granular sludge vulcanizes decalcification device which characterized in that: the device main body is sequentially divided into a sludge collecting area (I), a water distribution area (II), a decalcification area (III) and a vulcanizing area (IV) from bottom to top, and the circulating area (V) is independent from the device main body and is used for communicating the water distribution area (II) with the decalcification area (III) and communicating the water distribution area (II) with the vulcanizing area (IV); the sludge collection area (I) is sequentially connected with a sludge guide water pump (1), a water stop valve (3) and the bottom of an inverted cone-shaped sludge collection chamber (4) from bottom to top through a sludge guide pipe (2); the water distribution area (II) is provided with a water inlet pipe (27) and a water distributor (6) from bottom to top, and the water inlet pipe (27) is provided with a water inlet pump (28); the side wall of the decalcification area (III) is provided with a plurality of pH detection ports (5), the decalcification area (III) is divided into a granular sludge decalcification reaction chamber (7) and a precipitation separation chamber (8) from bottom to top, a mud-water separator (9) is arranged above the precipitation separation chamber (8), and the side wall of the device above the mud-water separator (9) is provided with a water outlet pipe (22) with a control valve (21); the bottom of a vulcanization area (IV) is separated from a decalcification area (III) through a porous filter plate (20), the middle of the vulcanization area (IV) is wrapped through a cylindrical outer wall to form a sulfur granule bed (14), the bottom of the outer wall of the sulfur granule bed (14) and the inner wall of a device main body are sealed through an annular water baffle plate (10), the bottom of the sulfur granule bed (14) is provided with an air supply device consisting of an air conveying pipe (11) and a tubular microporous aeration head (12), a porous bottom plate (13) for supporting sulfur granules is arranged in the sulfur granule bed (14), a headspace chamber (16) is arranged above the sulfur granule bed (14), and the headspace chamber (16) is communicated with a tail gas pipe (17) for discharging tail gas; the periphery of the sulfur granule bed (14) is wrapped with an annular acid storage chamber (19) for collecting sulfuric acid solution overflowed from the sulfur granule bed (14); the circulation zone (V) is provided with an acid liquor return pipe (24), an acid liquor reflux pump (25), a mixed liquor return pipe (23) and a mixed liquor reflux pump (26), the upper part of the decalcification zone (III) returns to the water distribution zone (II) through the mixed liquor return pipe (23) and the mixed liquor reflux pump (26), and the annular acid storage chamber (19) is introduced into the water distribution zone (II) through the acid liquor return pipe (24) and the acid liquor reflux pump (25);
the bottom of the annular acid storage chamber (19) is level to the porous bottom plate (13) of the sulfur particle bed, and the height of the acid liquor in the acid storage chamber is controlled to be 10-30% of the height of the sulfur particle bed; the volume ratio of the sulfur particle bed (14) to the annular acid storage chamber (19) is 1:0.8 to 1;
the volume ratio of the granular sludge decalcification reaction chamber (7) to the precipitation separation chamber (8) in the decalcification area (III) is 1:0.3 to 0.4; the included angle between the baffle of the mud-water separator (9) and the side wall of the main body of the device is 30-40 degrees; the vertical distance between a water outlet pipe (22) in the precipitation separation chamber (8) and the top of the decalcification area (III) is 5-10cm; three pH detection ports (5) are arranged in the decalcification area (III) at equal intervals along the height direction, and the vertical distance between the pH detection port (5) at the bottom end and the water inlet pipe (27) is 15-20cm.
2. The integrated granular sludge sulfurization decalcification apparatus according to claim 1, wherein: the volume ratio of the sludge collection area (I), the water distribution area (II), the decalcification area (III) to the vulcanization area (IV) is 1 to 1.5:1:8 to 10:1.5 to 2.
3. The integrated granular sludge sulfurization decalcification apparatus according to claim 1, wherein: the vertical distance between the liquid inlet end of the acid liquid return pipe (24) and the bottom of the vulcanization area (IV) is 5-10cm; the vertical distance between the liquid inlet end of the mixed liquid return pipe (23) and the top of the decalcification area (III) is 10-15cm.
4. The integrated granular sludge sulfurization decalcification apparatus according to claim 1, wherein: the height-diameter ratio of the whole granular sludge vulcanization decalcification device is 5~7:1, the height-diameter ratio of the sludge collection area (I), the water distribution area (II) and the vulcanization area (IV) is 0.5 to 1:1, the height-diameter ratio of the decalcification area (III) is 3~4:1.
5. the integrated granular sludge sulfurization decalcification apparatus according to claim 1, wherein: the bottom angle of the inverted conical mud collection chamber (4) is 50-70 degrees, and the vertical distance between the water inlet pipe (27) and the top of the chamber is 5-10 cm; the vertical distance between the liquid outlet ends of the acid liquid return pipe (24) and the mixed liquid return pipe (23) and the water inlet pipe (27) is 5-10cm.
6. The integrated granular sludge sulfurization decalcification apparatus according to claim 1, wherein: elemental sulfur particles are filled in the sulfur particle bed (14), and granular sludge is filled in the decalcification area (III).
7. The integrated granular sludge sulfurization decalcification apparatus according to claim 1, wherein: and an overflow weir (15) is arranged at the top of the outer wall of the sulfur granule bed (14).
8. A method for sulfurizing and decalcifying granular sludge by using the apparatus of claim 1, comprising the steps of:
opening a water stop valve (3), pumping calcified granular sludge into a decalcification area (III) of the reactor through a sludge guide pipe (2) by using a sludge guide water pump (1), and closing the water stop valve (3); a flow value is set for water inlet by a water inlet pump (28), and when the liquid level in the device continuously rises to the top of the decalcification area (III), the flow value of the water inlet is adjusted to enable the liquid level to rise and enter a vulcanization area (IV) through a porous filter plate (20); the gas pipe (11) starts to aerate and enters the sulfur particle bed (14) through the tubular microporous aeration head (12), acid is started to generate in the sulfur particle bed (14), sulfuric acid solution flows into the annular acid storage chamber (19) through the overflow weir (15) and is continuously accumulated, when the liquid level of the acid storage chamber reaches the upper limit of the control liquid level, the aeration is stopped, and the water inlet pump (28) is closed; opening the mixed liquid reflux pump (26) and the acid liquid reflux pump (25), and closing the acid liquid reflux pump (25) when the liquid level in the annular acid storage chamber (19) reaches the lower limit of the control liquid level height; and (3) keeping the mixed liquor to flow back to enable sulfuric acid liquor to be used for multiple times, continuously carrying out acid pickling and decalcification in the decalcification area (III), after multiple times of circulating cleaning, closing the mixed liquor reflux pump (26), opening the water inlet pump (28) and the water outlet pipe control valve (21), discharging the mixed liquor after pickling, discharging the granular sludge after decalcification through the sludge guide pipe (2), and continuing the next round of circulation.
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| KR101156737B1 (en) * | 2010-06-30 | 2012-06-14 | 최윤진 | Additive for sludge solidifying agent, method of preparing the same, and solidification treatment method of sludge using the same |
| CN103045299A (en) * | 2011-10-17 | 2013-04-17 | 中国石油天然气股份有限公司 | Method for circulating decalcification of crude oil by chemical precipitation |
| KR101432248B1 (en) * | 2012-12-28 | 2014-08-22 | 주식회사 와이씨씨 | method and apparatus for treating sludge generated in calciumchloride liquid type snow-removing agent, manufacturing apparatus of snow-removing agent |
| KR101656665B1 (en) * | 2015-11-30 | 2016-09-12 | 한국건설기술연구원 | Phosphorus removal and withdrawal system using multifuntional granular seed crystal and phosphorus removal or withdrawal method using the same |
| CN106007272A (en) * | 2016-08-11 | 2016-10-12 | 桂琪 | Biochemical treatment method and apparatus for high calcium and high magnesium waste water |
| CN206395925U (en) * | 2017-01-13 | 2017-08-11 | 上海碧州环保设备工程有限公司 | Deliming anaerobic reactor |
| CN207877538U (en) * | 2017-12-11 | 2018-09-18 | 浙江大学 | Integral type granule sludge vulcanizes decalcification device |
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