JPS5916585A - Flotation cyclone device - Google Patents

Abstract

PURPOSE:To improve the treatment capacity for sepn., by providing a tank for applying conditions to raw water, a supply device for chemicals to the system for applying conditions, an agitator, a flotation cyclone, a supply device for gas, a supply device for chemicals to the flotation system, etc. CONSTITUTION:Raw water is admitted from the 1st tank 13 into the 2nd tank 14, and an X agent is fed from a chemical tank 31 into the raw water. After the water is agitated with a pump 22, the water is pumped 73 to the upper part of the 1st flotation cyclone body 41, where easily floatable scum is formed by the low pressure air fed from a pump 90 and the ZK agent fed to the suction side of the pump 73. The scum is separated in a cyclone 40, and the remaining water after the sepn. is introduced into the 2nd flotation cyclone 50, so that the scum is separated in a cyclone body 51. The underflow in the body 51 passes through a pipe 72, and is discharged to the outside through a draining tank 120 having a level controller 121. Part thereof is delivered as circulating water to a tank 10 for applying conditions.

Description

[Detailed description of the invention]

The present invention relates to a flotation separation device for flotation separation of dissolved substances, suspended substances, sedimented substances, etc. in wastewater. Conventionally, dissolved substances in wastewater, 111 suspended substances, and sedimentation IJ1
There are various methods for separating and removing J-type substances, such as filtration, coagulation, precipitation, electrolysis, addition of L1°, etc., but each method has its own technical, economical, processing capacity, or tit location. Row a'1
There are many problems. As a countermeasure to this problem, the low-pressure flotation-1 separation method (Japanese Patent Application No. 54-2781), developed by the inventor of Wood, uses a foaming agent such as an interfacial agent to remove wastewater or pretreated wastewater. When a large amount of air and chemicals are mixed and stirred in the presence of water, the highly adhesive foam that is generated reduces the amount of various substances in wastewater.
Turbidity? Capture 1>, 4 L, add special medicine to this,
Although it has many advantages as a solid scum), it has been desired to further improve the processing capacity and the dewatering properties of the separated scum as it becomes a large-scale treatment. present invention

[A31% in 3L floating lift culm] Due to the dramatic improvement in 1lll capacity and improved dewatering properties of separated scum, only natural dewatering and air drying eliminates the need for mechanical dewatering process, reducing installation costs. Hereinafter, embodiments of the present invention will be explained with reference to the drawings.In Fig. 1, 1 indicates a place where 1!I!-J wastewater or scum dewatering tank 110, which will be described later, is collected. A raw water tank that stores filtered water (inclusive of both names, written as raw water - 0), 2 is a pump that sends raw water A in the raw water tank to tank 10 (= pump to send it to tank 10, 3 is a pipe, 4 is A valve 5 is a water level detector that detects the level of raw water Δ in the raw water tank 1 and sends out a signal 8 for starting and stopping the pump 2. 10 is a tank for adding strips 1, and a partition plate 11 .12 by 3
The I'fV is divided into 1st tank 13, 2nd tank 14, and 33rd tank 15, and 6 tanks (each with partition plate 11a□-1
lb, 12a to 121+ are connected to the open circuits J, .). In the first tank 13, when the water level exceeds the set water level height, the raw water is returned to the raw water tank 1.Δ-Part 111-1! , neck 1
6 is installed and it is full. 30 is article 1'l (=J drug supply device, e.g. J
- A chemical tank 31 that stores a chemical for preventing the destruction of 1-mulsion in flusicon oil-containing wastewater (this is referred to as X agent 1°)
and a chemical for adsorbing and collecting decomposed free oil (01
-1 drug and distribution. ) is stored in the drug (f'j L32) and the
4(, Y people in 2, 01-(drug J in pump 3/I,
The 33rd 4iIl115 will have 71 people. , 3rd
The appropriate loading force 11 of the 011 agent is automatically applied to the tank 15 (, shi, shi).
P 11: 'i+ 17 is set (nore-C.) 22 is a combination of 1 water and the x agent added to I in the second tank 1/I. Reaction 1, :Meni 1 Ka 1'l'
=l pump, 23 [Yo pump 22 is installed], 25 is a3 injected into the third tank 15, 011
d)y11v'? I Luponzo, 2 (The 3Lj pump 25 is installed and the I pipe. 40 is the first float.) - Branch 11 Reik 1-1, ji O
T, L second lewd separation reikku 11. 'I 1
, 5 ``N, i'E sore reikron book, 1 piece, 42.
521.1 A-barf []-receiving amount of soil molecule PIl sucano, from reikku 11, 43.5ζ3 is scum outflow 1-1.1101J, scum outflow]]43.13ζ)
112 receives the scum flowing out from the eyes and drains the liquid from the scum through the filtration tank 111;
It is a pipe that leads to. 60 is a flotation separation system co-agent supply device (゛, Article 1'L fJ
'If you use a chemical to scum the C type 11 in tank 1 (this is written as agent 7 or agent 7△).''
C″41 stored /1< drug tank 61, / to drug tank 62 (
zu(1e, /1〈71〈pump 03〉in the medicine tank 61.
6/I L, J, S, pipe 70.71 pump 73
．． Immediately before suctioning 7/I, remove the ZA agent tank (7Δ agent L in 32).
SI, pump 0 (no, 66, 31 people are sent to the discharge 11:!'k of Bonsif 3.74 of pipe 70.71. 11] The liquid in the first lewd - 1 minute freezes, ita 11 n 4
Turn to 0. 71 fJ 1st Jun-V separation 1 noise [Jn tree fA/1
1) Ink 11- to the 2nd lewd 1-public prostitute 11
(pipe leading to jO, 7 3.74 (J vibe 70.
A pump installed at 71, 80.811., l memorial service control valve 1. Although not shown, the medicine in the medicine tank 31. j
,・)(This configuration consists of 1゜90' IJ gas 11 supply ``q 4j Lee [Avon f, solenoid valves 91, 93, flow adjustment 11D valve 92.9
4 Pressure-C, the bar just before the suction of pump 73.7/'I (3, 100 is the 0 for injecting low-pressure air into f70.71 is the second floating fraction 1111 noise) -] N wooden body 51 underflow and the first flotation separation body/11 underflow are communicated (connection material, 1
01 is a communication pipe that connects the underflow of the first flotation and separation Zyclone main body with the third 1*1b underts ['-] of the strip 1*1*2 tank 10;
Responsible for maintaining the balance of the water level) (Iru, 112
0 is the second floating fraction of the final stage flowing from the vibe 72 bs
niJ, t-C second levitation separation leak [''nj)○, first
1-The liquid level of the separated Reikron 40 can be adjusted. 122 +j: A-half [1
-It is a device. 130 sends the treated water in the discharge tank 120 to the second tank 1/I of the soda tank 10 via a suction vibrator 132, a discharge control valve 133, and a vibrator 134 as necessary. The circulation pump, 131, is turned off when the circulation stops.
5 This is a check valve to prevent the raw water from flowing back into the treated water storage tank 120. 1 Next, the operation of the device described in 1-1 will be explained using the treatment of oil-containing wastewater as an example. ,. First, the raw water in the raw water tank 1 is sent to the first tank 13 of the water tank 10 by the pump 2. In the overflow device 16, the raw water stored in the first tank 13 (1. , 1 to 11b flows into the second tank 1/l (drug tank 31 ht
The K agent is mixed and stirred by the pump 22r. This K
- "-, Fludin" in the raw water is destroyed by the agent. The destroyed comargy 1-containing HIF wastewater is placed on the partition plate 12.
a-'121) 71) 11 From the connecting passage to the third tank 1
5, where the 011 agent is injected from the chemical tank 32, stirred by the pump 25, and the decomposed oil'! I7 is made up of K agent and OH agent.
The name is adopted by Idalfrock. After the above treatment, the raw water is pumped to pump 7.
At step 3, the liquid is sent to the upper part of the first floating and dividing Reikron main body 41 through the vibrator 70. At this time, immediately before the pump 73, the air pump 90 sends low L [air (0, 1 to -0
, 2kQ, /l) is injected, at 11, 21 ZK agents are injected into the suction side of the pump 73, and IIL (l
ZA agent is injected into the j side, and J easily floats to this [
A scum with a special composition that is difficult to break is produced. When the row-strengthened raw water is sent to the first flotation separation tank 1-1/IO, it is recycled to the first 17"-min 1, where C and scum are removed by the centrifugal action of 1-40". The water tank [Gathers in the center of 1 tank, floats to dry, is compacted, and is collected in the over half 1 of 1 tank main body 41] and is received in the tank 1111/12, and is drained through the outlet/I3 and drained into the water tank. 1
10 and is naturally dehydrated. The filtrate from the scum dewatering tank 110 is guided to the raw water tank 1. In this way, the scum is centrifuged (11-) and the separated residual water is sent to the pump 74. A/11
The liquid is guided from the upper part of the -C through the vibrator 71 to the second flotation separation re-clone 50. During this time, low temperature air is injected by the air bomb 90, and the pump 64.6
In J: 7, the ZA agent is on the 41 suction side.
(to the exit side), put it in the pump 74 and mix it.
'l' is done. J3, the K agent in the chemical tank 31 is injected into the vibrator 71 if necessary. Then, in the same process, the scum is separated in the second flotation separation liquid [Nine body 51, and the A-
Receive half I, 1- and j into saucer 52. 'l
1. The scum enters the scum escape tank 110 through the outlet 53 and is naturally dehydrated. The filtrate is led to raw water tank 1. Underwear [
]- is passed through the vibrator 72 and discharged to the outside via the drainage tank 120 with the level regulator 121, or as part of the circulating water, the circulation pump 130t'2 is used as the water tank 10. sent to. The water levels of the first and second float separating Reikron 40.50σ) are set by the level controller 121 of the JJI water tank 120,
Second floating fraction v! IJ (J Iku[)un 50's underts, 1-pa, Eve 72, 1st levitation separation recoon 40
underflow vibe 71, condition f/4 (cost 10
Underwear 1 piece's vibe 70 is] middle tube 100.1
01, the water level balance of phase N is automatically adjusted. + IZ A3 flow control valve 80.81
The opening degree should be adjusted on-site depending on the +'l capacity of each pump, but the degree of opening is based on the flow adjustment 10 valves 81.
It is desirable that the opening degree of the flow rate adjustment valve ↑E30 be larger than that of the flow rate adjustment valve ↑E30. Next, Table 1 shows an actual measurement example where emulsion oil-containing wastewater was subjected to flotation separation treatment using the flotation separation cycle of the present invention. (ljW machine maintenance] - field wastewater) 01-1 agent...0.25 ka/ 3rd (To tank 10 with column A'1) 01-1 agent...0.25 ka/ 'l
A.1 To tank 10) 2 + < agent - 0,01 kg / 3rd
(To pipe 70) ZA agent...0.01 kg/
Third (to pipe 70) first flotation separation Leeicron 40
1] [1-・10.
0 second C top 1i 11i
K mark 1 - 0.0 0 5 kg, / m
3ZA agent - 0,005 J, / m3 2nd flotation V separation - 1] 50) PH of raw water after drug injection = 8.5 1st and 2nd flotation separation V The float-V separation time in Ikron 40.50 was 1 minute in each case. In addition, in the case of treating wastewater containing heavy metal compounds, only one of the chemical tanks 31 or 32 is used, and this chemical tank 31 or 32 is used.
．． 32 is the X agent, 01-1 agent is 4A<, a chemical for precipitating heavy metal compounds (hereinafter referred to as FA agent) is stored in the chemical tank 31 (JNiagotJ, 32), and the second (
Alternatively, the third) tank 1/If:A- is poured into 15). Next, the alkaline battery factory wastewater was subjected to a CC treatment using the flotation separation device of the present invention. Battery: [△ agent for pumped and wastewater; linear alkylbenzenesulfonate sodium ZK agent;) j thionic polymer flocculant ZA agent; anionic polymer flocculant 1st flotation separation-like 1] Raw water sent to tank 40 Injection amount of liquid agent "Δ agent - 0,01 kg/m3 2 + < Saito... 0,0 1 k! Vibrator 71 to Con 50?1
Amount of drug to be injected Z
The flotation time for J3 was 1 minute. In the above actual measurements, the quality of the treated water was extremely good θr,
In particular, the sitting time in the cyclone was short, which was extremely short compared to the time required for conventional coagulation sedimentation, pressurized flotation, etc. Also, the temperature was much lower than in low-pressure levitation. That is, the separation time when the above-mentioned wastewater is separated by other conventional methods such as I5 coagulation sedimentation method, pressurized) upper shell method, and low-pressure flotation method, and the separation time of the above-mentioned method of the present invention. Table 3 shows the results of measuring the separation time when separation was avoided using the flotation separation Zylon device. Table 3 In addition, the number of flotation separation [con] is the raw water! ! 1
, depending on the properties of the flocs, etc. Also,
The order of injection of the ZK agent and the Z△ agent may be reversed depending on the type of raw water. As explained above, the floating-1-separation Reicron device of the present invention has a remarkable increase in processing capacity for separating dissolved substances, suspended substances, sedimentary substances, etc.
2 Mechanical filtration, which is often avoided due to its excellent water-based and air-drying properties, eliminates the need for one culm of water, and eliminates the need for conventional floating fraction l.
Since the cycle I, which is much smaller than the 111 tank, is used, it is possible to simplify the treatment installation and reduce the number of strokes.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of one embodiment of the present invention (8 components): 1... raw water tank, 5... water level detector, 1
o... Article i4ijJ! Fj tank, 21...
・・A-bar 71"-D', 22.25)...
・Pump, 30... Article (1) Re-system drug supply unit, 31... Drug tank, 32... Drug tank, /IO... First flotation separation 1 nok [1 nS
i! i placement, 150...second floating portion 1i111 reik 1-1 unit, /l 1.51...reiku [1 n body, 42.52...receiver 1111.43
3, ;53... Outflow 1-1.60...
Flotation separation system chemical supply device, 73.74...Pump, 80.81...Flow W control valve, 90...
-I-apump, 100.101...Communication pipe,
110... Scum dehydration tank, 120...
II outlet tank, 130...Circulation pump.

Claims (1)

[Claims] A raw water tank for storing raw water; A conditional tank for storing raw water sent from this raw water tank; Precipitating heavy metal compounds from the raw water or decomposing emulsion oil-containing wastewater in the raw water a condition C-j system drug supply device for injecting a drug that promotes the adhesion of the flocs and air vesicles into the tank; Stirring the nail water at 4A position; Condition A: 1 separation of the foamy scum from the raw water 1!
a first flotation separation cyclone; one or more second floats for further flotation and separation of foamy scum from the residual water after the foamy scum separation in the first floatation-F separation cyclone; Iku [Jn and; the above article ('l
(=l first flotation fraction 1i111 re-take from the feeding tank) flow path to the tank and first flotation separation cyclone/] day et al.
a gas supply device for injecting one gas into the flow path to the flotation separation cyclone, or from the upstream second cyclone to the downstream second flotation separation cyclone; a pump that is installed in the flow path and mixes and stirs the flowing liquid with the gas injected from the gas supply device; Immediately after the side, a flotation separation system chemical supply device for injecting a chemical to avoid scum of various types of ivy generated in the above-mentioned row A'1 A and ζJ feeding tank; Neuclone A - A scum dehydration tank that separates liquid from half-flowed foamy scum (viscous flotation separation)
Noik [1 device.