CN117142744B - Continuous sludge dewatering equipment and method - Google Patents
Continuous sludge dewatering equipment and method Download PDFInfo
- Publication number
- CN117142744B CN117142744B CN202311294582.4A CN202311294582A CN117142744B CN 117142744 B CN117142744 B CN 117142744B CN 202311294582 A CN202311294582 A CN 202311294582A CN 117142744 B CN117142744 B CN 117142744B
- Authority
- CN
- China
- Prior art keywords
- sludge
- tank
- iron salt
- concentration
- continuous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 265
- 238000000034 method Methods 0.000 title claims description 21
- 239000000126 substance Substances 0.000 claims abstract description 66
- 230000003750 conditioning effect Effects 0.000 claims abstract description 35
- 208000005156 Dehydration Diseases 0.000 claims abstract description 19
- 230000018044 dehydration Effects 0.000 claims abstract description 19
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 19
- 230000007935 neutral effect Effects 0.000 claims abstract description 10
- 238000006386 neutralization reaction Methods 0.000 claims description 57
- 238000003756 stirring Methods 0.000 claims description 49
- 150000002505 iron Chemical class 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000002378 acidificating effect Effects 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 9
- 230000001143 conditioned effect Effects 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 7
- 238000005188 flotation Methods 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims 2
- 159000000014 iron salts Chemical class 0.000 claims 1
- 238000010979 pH adjustment Methods 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 50
- 230000003113 alkalizing effect Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
- C02F11/145—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances using calcium compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The application provides continuous sludge dewatering equipment, which comprises a high-pressure elastic squeezer, a sludge conditioning tank and a concentration tank. One end of the concentration tank is connected with sludge; the input end of the sludge conditioning tank is communicated with the output end of the concentration tank, the sludge conditioning tank is used for adjusting the acidity and alkalinity of the sludge, and the sludge conditioning tank is used for adjusting the acidity and alkalinity of the sludge in the tank in a mode of sequentially adding alkaline substances and ferric salts into the sludge; the input end of the high-pressure elastic squeezer is communicated with the output end of the sludge conditioning tank, and the high-pressure elastic squeezer is used for squeezing and dehydrating the sludge subjected to pH value adjustment. The continuous sludge treatment dehydration equipment provided by the application can realize continuous dehydration treatment of sludge, condition the sludge, adjust the sludge to be neutral, greatly reduce the corrosiveness of the sludge, and ensure that the treated sludge is more environment-friendly.
Description
Technical Field
The invention relates to the field of sludge treatment, in particular to continuous sludge treatment dehydration equipment and method.
Background
In order to facilitate subsequent treatment, disposal and utilization of the sludge, the sludge is usually required to be dehydrated, the volume is reduced by reducing the water content of the sludge, the transportation and storage of the sludge and the progress of various treatment and disposal processes are facilitated, and simultaneously, organic matters, pathogenic bacteria and other toxic and harmful substances which can emit malodor, cause diseases and pollute the environment can be eliminated, so that the sludge is hygienically and stabilized. The traditional sludge dewatering equipment is generally used for simply reducing the water content of the sludge, and pH value of the sludge is not regulated, so that a small amount of acidic substances exist in the dewatered sludge, the sludge still has certain corrosiveness, and the environment is easily polluted.
Disclosure of Invention
The invention aims to provide continuous sludge treatment and dehydration equipment, which is used for solving the technical problem that the sludge after dehydration still has certain corrosiveness because the traditional sludge dehydration equipment cannot adjust the pH value of the sludge.
In order to achieve the above purpose, the invention adopts the following technical scheme: there is provided a continuous treatment sludge dewatering apparatus including:
a concentration tank, wherein one end of the concentration tank is connected with sludge;
the sludge conditioning tank is used for adjusting the acidity and alkalinity of the sludge, and the sludge conditioning tank is used for adjusting the acidity and alkalinity of the sludge in the tank in a mode of sequentially adding alkaline substances and ferric salts into the sludge;
A high-pressure elastic squeezer, wherein the input end of the high-pressure elastic squeezer is communicated with the output end of the sludge conditioning tank, the high-pressure elastic squeezer is used for squeezing and dehydrating the sludge with the pH value adjusted.
In one embodiment, the sludge conditioning tank comprises:
an alkalization tank, wherein one side of the alkalization tank is provided with a sludge input pipe;
the tail end of the alkaline substance input pipe extends into the alkalizing tank;
the neutralization tank is arranged at one side of the alkalization tank, and one side of the neutralization tank is provided with a sludge output pipe;
the sludge conveying device is arranged between the alkalization tank and the neutralization tank and is used for conveying sludge from the alkalization tank to the neutralization tank;
and the ferric salt input part is arranged at one side of the neutralization tank and is used for inputting ferric salt into the neutralization tank.
In one embodiment, the sludge conveying device is a screw feeding mechanism, the screw feeding mechanism is obliquely arranged, a bottom input port of the screw feeding mechanism is arranged at the bottom of the alkalization tank, and a top outlet of the screw feeding mechanism is positioned at the upper end of one side of the neutralization tank.
In one embodiment, the outlet end of the alkaline material input tube is located near the bottom input port of the screw feed mechanism.
In one embodiment, the iron salt input comprises:
the ferric salt temporary storage cavity is positioned above the outlet position of the sludge conveying device, and the bottom of the ferric salt temporary storage cavity is provided with a conveying channel communicated with the neutralization tank;
The ferric salt conveying pipe is communicated with the ferric salt temporary storage cavity and is used for conveying ferric salt powder into the ferric salt temporary storage cavity;
The telescopic check block is arranged in a chute intersecting with the conveying channel in a sliding manner, and a through hole is formed in the telescopic check block;
The elastic piece is positioned in the sliding groove, one end of the elastic piece is connected with the sliding groove, and the other end of the elastic piece is connected with the telescopic stop block;
The rotating wheel is rotatably arranged at the outlet position of the sludge conveying device, and a plurality of baffles are uniformly arranged on the rotating wheel; when the sludge conveying device conveys sludge into the neutralization tank, the sludge pushes the rotating wheel to rotate, and when the baffle rotates to the lower part of the telescopic stop block, the baffle pushes back the telescopic stop block, so that the through hole on the telescopic stop block is communicated with the conveying channel.
In one embodiment, the sludge conditioning tank further comprises a stirring part, wherein the stirring part is arranged in the neutralization tank and is used for stirring the sludge in the neutralization tank.
In one embodiment, the stirring section includes:
a power unit disposed above the neutralization tank;
The stirring shaft is in a hollow structure, a water inlet hole is formed in the stirring shaft, an air inlet hole is formed in the top of the stirring shaft, and the water inlet hole is inclined downwards from outside to inside;
the air extracting pump is communicated with the stirring shaft through a rotary joint;
The capillary tube is sleeved outside the stirring shaft, and the capillary tube covers the water inlet hole.
Another object of the present invention is to provide a continuous sludge dewatering method, which uses the continuous sludge dewatering apparatus according to any one of the above embodiments, and includes the following steps:
s1, concentrating sludge, namely, inputting the sludge into a concentration tank through a pipeline for concentration so as to carry out primary dehydration treatment on the sludge;
S2, sludge conditioning, namely pumping the sludge in the concentration tank into the sludge conditioning tank through a pipeline, and firstly adding a sufficient amount of alkaline substances into the sludge to neutralize and remove acidic substances in the sludge; adding enough ferric salt into the sludge, and removing the redundant alkaline substances by utilizing the reaction of the ferric salt and the redundant alkaline substances so as to make the sludge neutral and realize the regulation of the pH value of the sludge;
S3, squeezing and dehydrating the sludge, conveying the conditioned sludge into a high-pressure elastic squeezer, and further dehydrating the sludge by using the high-pressure elastic squeezer;
S4, carrying out sludge, and taking out and carrying out the dewatered sludge from the high-pressure elastic squeezer.
In one embodiment, the concentration mode of the concentration tank can be specifically a gravity concentration method, an air flotation concentration method or a centrifugal concentration method.
The above-mentioned one or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
According to the continuous sludge treatment dehydration equipment provided by the embodiment of the invention, the concentration tank is arranged, so that the sludge is firstly sent into the concentration tank for concentration, the sludge is subjected to preliminary dehydration, and the volume of the sludge is reduced, so that the subsequent treatment is facilitated. After the sludge is concentrated in the concentration tank, the sludge is pumped into the sludge conditioning tank through a pipeline, a sufficient amount of alkaline substances (specifically, calcium oxide powder or calcium hydroxide solution) is added into the sludge conditioning tank, and acid-base neutralization reaction is carried out by utilizing the alkaline substances and acidic substances in the sludge, so that the acidic substances in the sludge are removed. And then adding enough ferric salt into the sludge, and removing the redundant alkaline substances because the ferric salt reacts with the redundant alkaline substances, so that the sludge tends to be neutral. And then pumping the conditioned sludge into a high-pressure elastic squeezer for further dehydration treatment. Further, continuous dehydration treatment of the sludge is realized, the sludge is conditioned, the sludge is adjusted to be neutral, the corrosiveness of the sludge is greatly reduced, and the treated sludge is more environment-friendly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a continuous sludge dewatering treatment apparatus according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a sludge conditioning tank according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of an iron salt input part in a closed state according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of an iron salt input part provided in an embodiment of the present invention in an open state;
fig. 5 is a partially enlarged view at a in fig. 2.
Wherein, each reference sign is as follows:
1. An alkalizing tank; 2. an alkaline substance input tube; 3. a neutralization tank; 4. a sludge conveying device; 5. an iron salt input unit; 6. a sludge input pipe; 7. a sludge output pipe; 8. a stirring section; 51. a ferric salt temporary storage cavity; 52. a ferric salt conveying pipe; 53. a telescopic stop block; 54. an elastic member; 55. a rotating wheel; 81. a power section; 82. a stirring shaft; 83. an air extracting pump; 84. a capillary tube; 511. a conveying channel; 531. a through hole; 551. a baffle; 821. and a water inlet hole.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1, an embodiment of the present application provides a continuous sludge dewatering apparatus, which includes a high-pressure elastic squeezer, a sludge conditioning tank, and a concentration tank. One end of the concentration tank is connected with sludge; the input end of the sludge conditioning tank is communicated with the output end of the concentration tank, the sludge conditioning tank is used for adjusting the acidity and alkalinity of the sludge, and the sludge conditioning tank is used for adjusting the acidity and alkalinity of the sludge in the tank in a mode of sequentially adding alkaline substances and ferric salts into the sludge; the input end of the high-pressure elastic squeezer is communicated with the output end of the sludge conditioning tank, and the high-pressure elastic squeezer is used for squeezing and dehydrating the sludge subjected to pH value adjustment.
The continuous treatment sludge dewatering equipment provided by the embodiment is characterized in that the concentration tank is arranged, the sludge is firstly sent into the concentration tank for concentration, the sludge is subjected to preliminary dewatering, and the volume of the sludge is reduced so as to facilitate subsequent treatment. After the sludge is concentrated in the concentration tank, the sludge is pumped into the sludge conditioning tank through a pipeline, sufficient alkaline substances are added into the sludge conditioning tank, and acid-base neutralization reaction is carried out by utilizing the alkaline substances and acidic substances in the sludge, so that the acidic substances in the sludge are removed. And then adding enough ferric salt into the sludge, and removing the redundant alkaline substances because the ferric salt reacts with the redundant alkaline substances, so that the sludge tends to be neutral. And then pumping the conditioned sludge into a high-pressure elastic squeezer for further dehydration treatment. Further, continuous dehydration treatment of the sludge is realized, the sludge is conditioned, the sludge is adjusted to be neutral, the corrosiveness of the sludge is greatly reduced, and the treated sludge is more environment-friendly.
The alkaline substance may specifically be calcium oxide powder or calcium hydroxide solution, and the addition of calcium oxide powder to the sludge can avoid the increase of the water content of the sludge due to the addition of calcium hydroxide powder while removing the acidic substance in the sludge as well, because calcium oxide reacts with the water in the sludge to become calcium hydroxide and then reacts with the acidic substance in the sludge, compared with the addition of calcium hydroxide solution.
As shown in fig. 2, in one embodiment, the sludge conditioning tank includes an alkalizing tank 1, an iron salt input section 5, a neutralization tank 3, a sludge transporting device 4, and an alkaline substance input pipe 2. Wherein, one side of the alkalization tank 1 is provided with a sludge input pipe 6; the tail end of the alkaline substance input pipe 2 extends into the alkalizing tank 1; the neutralization tank 3 is arranged at one side of the alkalization tank 1, and one side of the neutralization tank 3 is provided with a sludge output pipe 7; the sludge conveying device 4 is arranged between the alkalization tank 1 and the neutralization tank 3, and the sludge conveying device 4 is used for conveying sludge from the alkalization tank 1 into the neutralization tank 3; the iron salt input unit 5 is provided on one side of the neutralization tank 3, and the iron salt input unit 5 is configured to input iron salt into the neutralization tank 3.
After the sludge enters the alkalizing tank 1 through the sludge input pipe 6, alkalizing treatment is carried out in the alkalizing tank 1, sufficient alkaline substances are input into the alkalizing tank 1 through the alkaline substance input pipe 2, and the alkaline substances react with acidic substances in the sludge to remove the acidic substances in the sludge. The sludge after the alkalization treatment is input into the side neutralization tank 3 through a sludge conveying device 4, and the sludge conveying device 4 can be a screw feeding mechanism or a slurry pump. Since the sludge entering the neutralization tank 3 contains a small amount of residual alkaline substances in order to remove the alkaline substances, ferric salt (specifically, ferric chloride solution or powder) is added into the neutralization tank 3 through the ferric salt input part 5, and neutral ferric hydroxide precipitate and strong acid and strong alkali salt (such as calcium chloride) are generated after the ferric salt reacts with the alkaline substances, so that the sludge is regulated to be neutral, the corrosiveness of the dehydrated sludge is reduced, and the environment is protected.
In one embodiment, the sludge conveying device 4 is a screw feeding mechanism, the screw feeding mechanism is obliquely arranged, the bottom input port of the screw feeding mechanism is arranged at the bottom of the alkalization tank 1, and the top outlet of the screw feeding mechanism is positioned at the upper end of one side of the neutralization tank 3. By adopting the screw feeding mechanism to transport the sludge in the alkalizing tank 1 to the neutralizing tank 3, the screw feeding mechanism can continuously stir the sludge while transporting the sludge, so that the acidic substances in the sludge can fully and thoroughly react with the alkaline substances, and the reaction efficiency of the acidic substances and the alkaline substances is improved. Therefore, the screw feeding mechanism can stir the sludge while transporting the sludge, and ensure that acidic substances and alkaline substances in the sludge thoroughly react.
In one embodiment, the outlet end of the alkaline substance inlet pipe 2 is located near the bottom inlet of the screw feed mechanism. The output end of the alkaline substance input pipe 2 is arranged near the bottom input port of the screw feeding mechanism, and the output rate of the alkaline substance input pipe 2 can be adjusted as well because the conveying power of the screw feeding mechanism can be adjusted, so that the conveying power of the screw feeding mechanism and the alkaline substance input pipe 2 can be controlled by setting the proportion of sludge to alkaline substance according to specific requirements, the sludge and the alkaline substance entering the screw feeding mechanism are kept in a specific proportion, and uniform mixing of the alkaline substance and the sludge is ensured, so that the sludge alkalization treatment is facilitated.
In order to facilitate uniform and quantitative mixing of the ferric salt with the sludge so as to facilitate the reaction of the ferric salt with the excessive alkaline substances in the sludge, as shown in fig. 2-4, in one embodiment, the ferric salt input part 5 comprises a rotating wheel 55, a ferric salt conveying pipe 52, a telescopic stop 53, an elastic piece 54 and a ferric salt temporary storage cavity 51. Wherein, the ferric salt temporary storage cavity 51 is positioned above the outlet position of the sludge conveying device 4, and the bottom of the ferric salt temporary storage cavity 51 is provided with a conveying channel 511 communicated with the neutralization tank 3; the ferric salt conveying pipe 52 is communicated with the ferric salt temporary storage cavity 51, and the ferric salt conveying pipe 52 is used for conveying ferric salt powder into the ferric salt temporary storage cavity 51; the telescopic stop block 53 is arranged in a sliding groove intersecting with the conveying channel 511 in a sliding way, and a through hole 531 is formed in the telescopic stop block 53; the elastic piece 54 is positioned in the chute, one end of the elastic piece 54 is connected with the chute, and the other end of the elastic piece 54 is connected with the telescopic stop block 53; the rotating wheel 55 is rotatably arranged at the outlet position of the sludge conveying device 4, and a plurality of baffles 551 are uniformly arranged on the rotating wheel 55; when the sludge conveying device 4 conveys sludge into the neutralization tank 3, the sludge pushes the rotating wheel 55 to rotate, and when the baffle 551 rotates below the telescopic baffle 53, the baffle 551 pushes back the telescopic baffle 53, so that the through hole 531 on the telescopic baffle 53 is communicated with the conveying channel 511.
When the sludge in the alkalization tank 1 is transported to the neutralization tank 3 through the sludge transporting device 4, the sludge slides into the neutralization tank 3 along the inclined passage at the top, the baffle 551 on the rotating wheel 55 is driven in the process of sliding the sludge, so that the rotating wheel 55 rotates, after the rotating wheel 55 rotates to a certain angle, the baffle 551 can push the telescopic stop 53 back upwards, the through hole 531 on the telescopic stop 53 is communicated with the transporting passage 511, the transporting passage 511 is smooth (the telescopic stop 53 is in an extending state under the elastic force of the elastic piece 54 before, so that the telescopic stop 53 stops the transporting passage 511), and further, the ferric salt in the ferric salt temporary storage cavity 51 can slide into the neutralization tank 3 downwards through the transporting passage 511 (as shown in fig. 4), and the ferric salt powder output from the transporting passage 511 can just fall onto the sludge just entering the neutralization tank 3. When the rotating wheel 55 continues to rotate, the baffle 551 releases the telescopic stop 53, so that the telescopic stop 53 stretches out and blocks the conveying channel 511 under the action of the elastic force of the elastic member 54 (the elastic structure such as a spring or a shrapnel), and the conveying channel 511 stops conveying the ferric salt into the neutralization tank 3 (as shown in fig. 3). Therefore, the ferric salt input part 5 in this embodiment can automatically adjust the output of ferric salt according to the amount of sludge entering the neutralization tank 3 (the faster the sludge is input, the faster the rotating speed of the rotating wheel 55 is, so that the faster the frequency of opening the telescopic stopper 53 is, and the further the amount of ferric salt entering the neutralization tank 3 is increased accordingly). And because the ferric salt is input into the neutralization tank 3 through the ferric salt input part 5, the ferric salt can be primarily and quantitatively mixed with the sludge according to the amount of the sludge input into the neutralization tank 3, so that the subsequent ferric salt and alkaline substances in the sludge can be conveniently reacted.
As shown in fig. 2, in one embodiment, the sludge conditioning tank further includes a stirring portion 8, the stirring portion 8 is disposed in the neutralization tank 3, and the stirring portion 8 is used for stirring the sludge in the neutralization tank 3. By arranging the stirring part 8 to stir the sludge, the reaction rate of the ferric salt and the alkaline substance is improved, and the alkaline substance in the sludge can be fully reacted with the ferric salt.
As shown in fig. 2-5, in one embodiment, the stirring section 8 includes a motive section 81, a capillary tube 84, a suction pump 83, and a stirring shaft 82. Wherein the power part 81 is arranged above the neutralization tank 3; one end of a stirring shaft 82 is communicated with a power output shaft of the power part 81, the other end of the stirring shaft 82 is rotatably fixed at the bottom of the neutralization tank 3, the stirring shaft 82 is of a hollow structure, a water inlet hole 821 is formed in the stirring shaft 82, an air inlet hole is formed in the top of the stirring shaft 82, and the water inlet hole 821 is inclined downwards from outside to inside; the air pump 83 is communicated with the stirring shaft 82 through a rotary joint; the capillary tube 84 is sleeved outside the stirring shaft 82, and the capillary tube 84 covers the water inlet 821.
When the power unit 81 (motor, etc.) is started, the stirring shaft 82 rotates and stirs the sludge in the neutralization tank 3 so that the iron salt reacts with the alkaline substances in the sludge. At this time, the air pump 83 is started, because the surface of the stirring shaft 82 is provided with the capillary tube 84, under the capillary action, the moisture in the sludge can move inwards from the surface of the capillary tube 84 to the side close to the stirring shaft 82, and because the air flow from top to bottom exists under the action of the air pump 83 in the stirring shaft 82, the moisture in the capillary tube 84 can be sucked into the stirring shaft 82 from the water inlet under the action of vacuum negative pressure, and the moisture entering the stirring shaft 82 flows downwards along the stirring shaft 82 and flows out of the neutralization tank 3, so that the dehydration treatment of the sludge is realized. Therefore, the stirring part 8 in this embodiment can stir the sludge to increase the reaction rate of the alkaline substance and the ferric salt, and simultaneously remove part of the water in the sludge, reduce the water content of the sludge, and relieve the dehydration treatment pressure of the subsequent high-pressure elastic squeezer.
Another object of the present invention is to provide a continuous sludge dewatering method, which adopts the continuous sludge dewatering apparatus according to any one of the above embodiments, and includes the following steps:
s1, concentrating sludge, namely, inputting the sludge into a concentration tank through a pipeline for concentration so as to carry out primary dehydration treatment on the sludge;
S2, sludge conditioning, namely pumping the sludge in the concentration tank into the sludge conditioning tank through a pipeline, and firstly adding a sufficient amount of alkaline substances into the sludge to neutralize and remove acidic substances in the sludge; adding enough ferric salt into the sludge, and removing the redundant alkaline substances by utilizing the reaction of the ferric salt and the redundant alkaline substances so as to make the sludge neutral and realize the regulation of the pH value of the sludge;
S3, squeezing and dehydrating the sludge, conveying the conditioned sludge into a high-pressure elastic squeezer, and further dehydrating the sludge by using the high-pressure elastic squeezer;
S4, carrying out sludge, and taking out and carrying out the dewatered sludge from the high-pressure elastic squeezer.
In one embodiment, the concentration mode of the concentration tank can be specifically a gravity concentration method, an air flotation concentration method or a centrifugal concentration method. Specifically, the gravity concentration method adopts a sludge concentration tank, which has two continuous and intermittent modes, the structure of the concentration tank is similar to that of a sedimentation tank, and most of the gravity concentration method adopts a round tank with the diameter of 5-20 meters, and a stirring machine is arranged in the round tank for slow stirring. The air-floating concentration method is opposite to the gravity concentration method, so that sludge particles attach with micro bubbles and float up to the water surface, then concentrated sludge is scraped into a sludge discharge groove by a scraper, and sludge water flows out from the bottom of the tank. Centrifugal concentration processes are carried out in specially manufactured centrifugal concentrators. The sludge has different solid and liquid specific gravities and different centrifugal tendencies, so as to separate the sludge and the water, thereby achieving the purpose of concentration.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311294582.4A CN117142744B (en) | 2023-10-08 | 2023-10-08 | Continuous sludge dewatering equipment and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311294582.4A CN117142744B (en) | 2023-10-08 | 2023-10-08 | Continuous sludge dewatering equipment and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117142744A CN117142744A (en) | 2023-12-01 |
| CN117142744B true CN117142744B (en) | 2024-11-22 |
Family
ID=88910133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311294582.4A Active CN117142744B (en) | 2023-10-08 | 2023-10-08 | Continuous sludge dewatering equipment and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117142744B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671923A (en) * | 2019-09-26 | 2020-01-10 | 艾特克控股集团股份有限公司 | A vertical unpowered helical stirring biological drying device and method |
| CN216737976U (en) * | 2021-12-17 | 2022-06-14 | 张家港市清源水处理有限公司 | Pretreatment system of oily wastewater |
| CN217265395U (en) * | 2022-01-25 | 2022-08-23 | 太原市润民环保节能有限公司 | Municipal sludge low-pressure deep dehydration device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106115886B (en) * | 2016-08-31 | 2022-05-17 | 开源环保（集团）有限公司 | Sewage filters charge device |
| CN107337334A (en) * | 2017-07-18 | 2017-11-10 | 无锡绿麦环保科技有限公司 | Sludge drying dewatering system based on disk desiccation |
-
2023
- 2023-10-08 CN CN202311294582.4A patent/CN117142744B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671923A (en) * | 2019-09-26 | 2020-01-10 | 艾特克控股集团股份有限公司 | A vertical unpowered helical stirring biological drying device and method |
| CN216737976U (en) * | 2021-12-17 | 2022-06-14 | 张家港市清源水处理有限公司 | Pretreatment system of oily wastewater |
| CN217265395U (en) * | 2022-01-25 | 2022-08-23 | 太原市润民环保节能有限公司 | Municipal sludge low-pressure deep dehydration device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117142744A (en) | 2023-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101851988B1 (en) | Sludge dehydrator | |
| JP5340813B2 (en) | Screw press dehydrator, sludge treatment system, and method of operating sludge treatment system | |
| CN109250886B (en) | Stacked screw type sludge dewatering machine and use method thereof | |
| CN206736066U (en) | A kind of combined type deep dehydration system for sludge | |
| CN208395030U (en) | A kind of novel oily sludge dehydration treatment equipment | |
| CN218740760U (en) | A wastewater sedimentation treatment device | |
| CN117142744B (en) | Continuous sludge dewatering equipment and method | |
| CN221522242U (en) | A device for treating and reusing agricultural wastewater | |
| CN215905433U (en) | Vacuum conveying sludge dewatering device | |
| CN217350990U (en) | An integrated liquid-liquid reaction device for reaction and sedimentation | |
| KR20060005795A (en) | Dehydration Vehicle System | |
| CN111233273A (en) | Sewage treatment equipment and method | |
| CN108658414B (en) | Sludge concentration and conditioning device and method for treating sludge by using same | |
| JP7003192B1 (en) | Organic sludge treatment equipment and treatment method | |
| CN207913765U (en) | A kind of consersion unit dirty for metal acid | |
| CN116395815A (en) | A sewage treatment method based on desulfurization and denitrification | |
| JP3035250B2 (en) | Powder mixing device and powder reactor equipped with the same | |
| CN209740789U (en) | Desulfurization wastewater treatment system of power plant | |
| CN222647832U (en) | A squeezing device for deep sludge reduction | |
| CN112429886A (en) | Glass polishing wastewater treatment method | |
| CN221608156U (en) | Device for treating gold ore heap leaching solution | |
| CN216513436U (en) | Safe integrated equipment of sludge high-pressure dehydration mummification deodorization | |
| CN220182918U (en) | Novel sewage flocculation separation treatment device | |
| CN216472805U (en) | Sludge blocking prevention structure of belt type dewatering machine | |
| CN210559976U (en) | River sludge treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |