CN213803270U

CN213803270U - Chemical oil remover

Info

Publication number: CN213803270U
Application number: CN202022654136.8U
Authority: CN
Inventors: 贾明贻; 徐志永; 汪峰
Original assignee: Shandong Laigang Yongfeng Steel and Iron Co Ltd
Current assignee: Shandong Laigang Yongfeng Steel and Iron Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-07-27
Anticipated expiration: 2030-11-17

Abstract

The utility model belongs to a chemical degreaser, including mixing chamber and drip chamber, the both sides of mixing chamber are equipped with first backwater portion and second backwater portion, and first backwater portion is equipped with first return pipe, first return header tank and first filter screen, and second backwater portion is equipped with second return pipe, second return header tank and second filter screen, and is equipped with the pipeline of slope between first return pipe and the second return pipe for communicate first return pipe and second return pipe, and the side of first backwater portion and second return pipe all is connected with overflow and moves back the basin; an oil baffle plate is arranged in the overflow toothed plate group; the bottom of drip chamber is equipped with annular blow off pipe, and the top of annular blow off pipe is equipped with a plurality of evenly distributed's blowoff hole, and annular blow off pipe is connected with first pipeline and with first pipeline vertically second pipeline and third pipeline, and first pipeline is equipped with first blowoff valve, second blowoff valve and tubing pump, is connected with the third blowoff valve on the second pipeline, is connected with the check valve on the third pipeline.

Description

Chemical oil remover

Technical Field

The utility model belongs to the technical field of water treatment, concretely relates to chemistry degreaser.

Background

The existing oil remover is MHCYG-400 chemical oil remover every timeThe hourly water treatment amount is 400m³H, the original design drawing speed of the continuous casting machine is 2.8-3.2m/min, and the water treatment capacity of the existing chemical oil remover can meet the water consumption requirement of the continuous casting machine according to the design requirement of turbid circulating water distribution of the continuous casting machine; in recent years, with the continuous upgrading and reconstruction of continuous casting machine equipment, the steel billet drawing speed is gradually increased from 2.8-3.2m/min to 3.6-3.7m/min, and with the continuous increase of the drawing speed, the turbid circulating water volume of the continuous casting machine is increased from 400m³H rises to 580m³H, the amount of cooling water in the turbid ring rises by 180m³The chemical degreaser causes a number of serious problems:

a. the circulating water amount exceeds the designed water amount:

the circulating water amount of turbid circulating water is 400m³H is increased to 580m³H, water yield increased by 180m³After the time/hour, in order to prevent the water quality index of the oil remover from deteriorating due to overload, the opening of a water inlet valve is closed to 50 percent from 100 percent, the opening of the valve is reduced, but the phenomenon that the effluent turbidity index exceeds the standard still occurs when the flow rate of circulating water in the oil remover is too high.

b. The water returning of the water returning groove is not timely, the overflow toothed plate group is directly submerged, and the oil remover is seriously deflected:

after the circulating water quantity is increased, the chemical oil remover overflows and is seriously full of water in the water return tank, only one set of backflow water collecting tank and one set of water return pipe are designed on the right side of the existing chemical oil remover, so that the circulating water on the upper part of inclined pipe filler of the oil remover obviously appears a virtual water distribution line taking a dotted line as a boundary line, the circulating water on the left side of the virtual water distribution line basically does not flow, and the circulating water flow rate in the right area is increased by 4 times compared with the original design.

c. The effluent turbidity seriously exceeds the standard and does not meet the requirement of high drawing speed of a continuous casting machine:

after the oil remover has serious bias flow, the water flow speed of an inner water through hole of the inclined tube filler and a water purification area at the upper part of the filler reaches 1.315m/s (the original design flow speed is 0.907m/s), exceeds the design flow speed by 0.408m/s, flocs generated after adding the medicine cannot be deposited for enough time, backwater in an overflow water returning tank is caused to carry a large amount of flocs to return to a cooling water system of a continuous casting machine again, the highest turbidity of the effluent of the oil remover reaches 15NUT/L, the general turbidity test value is between 9 and 13NUT/L, the average turbidity is NUT/L (if the oil remover observes the water quality on site, the inclined tube filler cannot be basically seen), the cooling nozzle of the continuous casting machine is seriously blocked, and the online service cycle is greatly shortened.

d. The blow off pipe design is unreasonable, causes the unable thorough discharge of deposit room mud:

the circulating water flow rate on the right side of the virtual diversion line is too high, so that the flocculate deposition amount in the area is more than that on the left side, in addition, the pipe joint of the originally designed drain pipe is directly welded on a steel plate on the side surface of the bottom of the box body, and in addition, the design size of the bottom of the settling chamber is 2000 multiplied by 2000mm, the height is 3200mm and the size is larger, when the drain butterfly valve is opened to 100 percent to achieve full pipe drain in the drain operation, because the sludge contains fine oxide scale particles, the density is high, the self-flowing performance is poor, only the sludge in the range of yellow dotted line in the attached drawing 1 can be discharged, the sludge in the far area of the drain pipe opening cannot be completely discharged, and the effect of thorough drain of the settling chamber cannot be achieved; if the sewage discharge time is prolonged, excessive clear water can be discharged, so that water resource waste is caused, and the production cost is increased.

e. The wall of the sedimentation tank is corroded, and the phenomenon of serious sludge accumulation exists:

the four walls of the sedimentation tank are made of Q235, and the sedimentation tank belongs to common plates and is poor in corrosion resistance. In order to control the growth of microorganisms in the circulating water, the sterilizing algicide needs to be added into the circulating water regularly and quantitatively. The agent contains chlorine ion elements, and can cause pitting corrosion to Q235 steel in a circulating water system after long-term use, so that a plurality of corrosion protrusions on the peripheral steel plate of the sedimentation tank become rough, certain resistance is generated on sludge gathered on the inclined plate of the sedimentation chamber, and the sludge can not smoothly slide into the bottom of the chamber, so that the accumulation of the four walls is serious. After a long time, if the oil remover cannot be thoroughly washed, sludge can be accumulated to the position close to the filler pipe opening of the inclined pipe, so that not only can certain influence be caused on the downward sliding of the newly generated flocculate sediment, but also the flow rate of circulating water of the inclined pipe is accelerated, the flocculate is stirred, and the flocculate can reenter the circulating water to cause the over-standard turbidity.

f. The water and the medicine in the mixing chamber are mixed unevenly, which means that the mixing time is shortened, and the turbidity index of the effluent is easy to fluctuate:

because the direct-through mixing chamber of inlet channel in the mixing chamber, can't carry out the intensive mixing to the polypropylene medicament that adds on the trunk line, the medicament directly gets into the settling zone in short time, mixes inhomogeneous medicament and can not play abundant flocculation and precipitation effect in circulating water, makes to have a large amount of tiny suspended solids in the circulating water, and the turbidity index can't obtain the guarantee.

g. The pollution discharge work is greatly influenced by factors such as the working mode of operators, the pollution discharge principle and the like, so that the pollution discharge efficiency is low, and the effluent turbidity index is greatly fluctuated.

The current oil remover blowdown principle is a static pressure manual blowdown operation mode, and a blowdown pipeline in a settling chamber is unreasonably designed; the sewage discharge mode and the working experience of operators limit the sludge in the settling chamber, so that the sludge in the settling chamber cannot be completely discharged, the sewage discharge efficiency is low, and the effluent turbidity index fluctuation is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a chemical degreaser.

The utility model provides a technical scheme that its technical problem adopted is: a chemical oil remover comprises a mixing chamber and a settling chamber, wherein a first return water part and a second return water part are arranged on two sides of the mixing chamber, the first return water part is provided with a first return pipe, a first return water collecting tank and a first filter screen, the second return water part is provided with a second return pipe, a second return water collecting tank and a second filter screen, an inclined pipeline is arranged between the first return pipe and the second return pipe and used for communicating the first return pipe and the second return pipe, and the side surfaces of the first return water part and the second return water part are both connected with an overflow water returning tank so that water in the overflow water returning tank flows through the return pipe at the bottom of the return water collecting tank after entering the return water collecting tank through the filter screens; the oil baffle plates are positioned on two sides of the overflow toothed plate group; the lateral wall of drip chamber is equipped with the PVC board, the bottom of drip chamber is equipped with annular blow off pipe, the top of annular blow off pipe is equipped with a plurality of evenly distributed's blowoff hole, the top of the inlet tube of drip chamber is equipped with the sphere agitator, annular blow off pipe is connected with first pipeline, and with first pipeline vertically second pipeline and third pipeline, first pipeline is equipped with first blowoff valve, second blowoff valve and tubing pump, be connected with the third blowoff valve on the second pipeline, be connected with the check valve on the third pipeline.

Specifically, the oil remover is also provided with an overflow toothed plate group and oil baffle plates positioned on two sides of the overflow toothed plate group.

Specifically, an inclined tube filling position and a water distribution port are further arranged in the mixing chamber, and a water retaining partition plate is arranged between the inclined tube filling position and the water distribution port.

Specifically, the top of the mixing chamber is provided with a platform rail.

The utility model discloses following beneficial effect has: the chemical oil remover meets the treatment requirement of high water quantity of circulating water, and ensures that the water treatment index meets the technical requirement; the phenomenon that the water return tank is seriously full of water is eliminated, and the problem of bias flow of the oil remover is solved; the effluent turbidity index is reduced, and the requirement of high-casting-speed water use of a continuous casting machine is met; the problem of corrosion of the wall of the sedimentation tank is solved, and the problem of serious sludge accumulation on the wall of the sedimentation tank is solved; the polypropylene medicament in the mixing chamber is not uniformly mixed for a short time, and cannot meet the requirement of polypropylene mixing time, so that the particle size of flocculate of the oil remover is too small, and the precipitation effect is poor; improve the unreasonable design of blow off pipe, make the sludge in the settling chamber discharge thoroughly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of fig. 1.

In the figure: 1-inclined tube filling; 2-a first return pipe; 3-a first return header tank; 4-a first filter screen; 5-overflow water-withdrawal tank; 6-platform railing; 7-oil baffle; 8-water retaining partition board; 9-a mixing chamber; 10-an overflow fluted plate group; 11-water distribution port; 12-a second filter screen; 13-a second return header tank; 14-a second return conduit; 15-PVC board; 16-a spherical agitator; 17-a water inlet pipe; 18-annular blow-off pipes; 19-a first waste valve; 20-a second blowdown valve; 21-a third blowdown valve; 22-a check valve; 23-a pipeline pump; 24-a precipitation chamber.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-2, a chemical degreaser comprises a mixing chamber and a settling chamber, wherein a first return water part and a second return water part are arranged on two sides of the mixing chamber, the first return water part is provided with a first return pipe 2, a first return water collecting tank 3 and a first filter screen 4, the second return water part is provided with a second return pipe 14, a second return water collecting tank 13 and a second filter screen 12, an inclined pipeline is arranged between the first return pipe 2 and the second return pipe 14 and used for communicating the first return pipe 2 and the second return pipe 14, and the side surfaces of the first return water part and the second return water part are both connected with an overflow water returning tank 5, so that water in the overflow water returning tank 5 flows through the return pipe at the bottom of the return water collecting tank after entering the return water collecting tank through the filter screens; the side wall of the settling chamber is provided with a PVC plate 15, the bottom of the settling chamber is provided with an annular blow-off pipe 18, the top of the annular blow-off pipe 18 is provided with a plurality of blow-off holes which are uniformly distributed, the top of a water inlet pipe 17 of the settling chamber is provided with a spherical stirrer 16, the annular blow-off pipe 18 is connected with a first pipeline, a second pipeline and a third pipeline which are vertical to the first pipeline, the first pipeline is provided with a first blow-off valve 19, a second blow-off valve 20 and a pipeline pump 23, the second pipeline is connected with a third blow-off valve 21, wherein the first blow-off valve 19 is a manual blow-off valve, the second blow-off valve 20 and the third blow-off valve 21 are both electric blow-off valves, and the third pipeline is connected with a check valve 22; the oil remover is also provided with an overflow toothed plate group 10 and oil baffle plates 7 positioned at two sides of the overflow toothed plate group 10, an inclined tube filling part 1 and a water distribution port 11 are also arranged in the mixing chamber, and a water baffle plate 8 is arranged between the inclined tube filling part 1 and the water distribution port 11; the top of the mixing chamber is provided with a platform rail 6.

The chemical oil remover is additionally provided with two parts, namely, a set of first water return part is additionally arranged on one side of the overflow water returning groove; secondly, a set of forced sewage discharging device is added on the sewage discharging pipeline of the settling chamber.

PVC plates 15 are riveted on steel plates on the periphery of the settling chamber 24, so that the problem of corrosion and mud hanging of the tank walls on the four sides is solved, and the gliding resistance of the mud is reduced; an annular flute-shaped blow-off pipe 19 is arranged at the bottom of the sedimentation tank, so that the problem that the sedimentation tank 24 cannot completely discharge the sludge is solved.

The spherical stirrer 16 is arranged at the top of the water inlet of the mixing chamber, so that the problem of poor mixing of the medicament is solved, circulating water mixed with the medicament is fully mixed after entering the mixing chamber, and the flocculation precipitation effect of the oil remover is improved.

An ISG (B)125-160B and a flow 138m are added on the annular sewage draining pipe 18³The electric blow-down valve 21 and the check valve 22 are respectively arranged at the front and the rear of the pipeline pump 23 of 24 m/h and the pipeline pump 23, and the traditional static pressure blow-down mode is changed into forced blow-down, so that the sludge can be thoroughly discharged in the shortest time, and the purpose of less water loss is achieved.

The treatment capacity of the chemical oil remover in effluent is increased by 180m³Under the condition of/h (exceeding 45 percent of the designed water quantity), the bias current is eliminated, the problem of over standard turbidity indexes is solved, and a high-quality water source is provided for high and stable yield of the continuous casting machine.

The utility model discloses a structure is constituteed:

mainly comprises the following steps: the device comprises a first return pipe 2, a first return header tank 3, a first filter screen 4, an oil baffle plate 7, a PVC plate 15, a spherical stirrer 16, a third blowdown valve 21, a check valve 22 and a pipeline pump 23.

The first reflux pipe is about 20 meters of a spiral welded pipe with the diameter of 355.6 multiplied by 10 mm; 3 DN350 multiplied by 10mm, 90 degrees punching bend; 1 DN350 multiplied by 10mm, 135 degrees punching elbow; 10a channel steel 4 m.

An inclined pipeline with the diameter of 355.6 is welded at the bottom of the first return water collecting tank 3 of the oil remover and led to the second return pipe 14, the inclination angle is not lower than 10 degrees when the pipeline is installed, and the first return pipe 2 and the second return pipe 1 are connected in a mode of being 45 degrees along the water direction, so that the phenomenon of water return and flow blocking of a new pipeline and an old pipeline can be avoided when the pipeline is installed.

The first backflow water collecting tank 3 is made of a Q235 steel plate made of a material delta equal to 6mm, the second backflow water collecting tank is manufactured by full welding according to the size of 14 second backflow water collecting tanks, the manufactured backflow water collecting tanks and the oil remover tank body are welded together, the position of the bottom plate of the first backflow water collecting tank 3 is about 800mm lower than that of the bottom plate of the overflow water returning tank 5, and the welding mode is angle type continuous welding. And cutting part of the box body at the first backflow water collecting box 3 according to the outline size of the inner diameter of the water collecting box, and manufacturing a water outlet of the overflow water returning groove 5, wherein the lowest part of the water outlet is consistent with the bottom plate of the overflow water returning groove 5.

First filter screen 4 is located 5 export of overflow water trap 5 and welds the angle steel on the 100mm position department of the perpendicular direction and does filter screen track groove, does the skeleton with 40 x 4's grid board, and the steel mesh of aperture 5mm is fixed with the grid board skeleton and is made into first filter screen 4 together, exports at the water trap and increases first filter screen 4 after, can effectively block the suspended solid in the circulating water, reduces degreaser play water suspended solid content.

The method comprises the following steps of (1) adding a layer of PVC plate 15 with delta of 10mm on a Q235 steel plate in a settling chamber 24, wherein the surface roughness of the PVC plate 15 is required to be less than Ra0.16, the blanking size is required to be consistent with the size of the trapezoidal plate around the settling chamber 24, machining an angle 60-degree chamfer at the top of the PVC plate 15, machining a plurality of bolt holes with phi 11mm on the surface of the PVC plate 15, then reaming a counter bore with the depth of 5mm, enabling the bolt holes to be spaced at a distance of 200mm, keeping the distance from the edge of the PVC plate 15 to be 20mm, and cleaning up burrs at the edge of the counter bore after machining; the PVC plate 15 and the peripheral steel plate of the settling chamber 24 are fixed firmly by using M10 multiplied by 20 countersunk head bolts, finally, the edge of the PVC plate 15 is in seamless fusion with the steel plate of the box body, and the anti-seepage water treatment is well carried out, so that the purpose of preventing the steel plate from being corroded and rusted due to the water entering between the PVC plate 15 and the steel plate crack is realized, and the PVC plate 15 is bulged.

The spherical stirrer 16 is made of 304 stainless steel plates with the thickness delta equal to 8mm, the spherical contour diameter phi 456mm is 100mm larger than the diameter of a water inlet pipe orifice, the spherical stirrer 16 is connected with the water inlet pipe 17 through three M36L-650 mm double-head stainless steel bolts, 3 supporting bolts are fixed on a pipe seat of the water inlet pipe 17 respectively, an M36 nut is added to each pipe seat for loosening and loosening during installation, fastening is firm, loosening and falling after long-time water flow washing are prevented, an M36 nut is screwed on the top of each bolt for height positioning of the stirrer, and the height deviation of the three nuts is required to be controlled within 1 mm; and then the spherical stirrer 16 is installed in place, the height of the nut is adjusted to ensure that the gravity center of the spherical stirrer 16 is superposed with the center of the pipeline, after the position of the spherical stirrer 16 is adjusted, a phi 36 flat pad, a phi 36 spring washer and an M36 nut are sequentially installed on the spherical panel to firmly fix the arc plate.

The third blow-down valve 21, the second blow-down valve 20 at the outlet of the annular blow-down pipe 18 and the inlet of the pipe pump 23 are D941F-10C-DN200, the second blow-down valve 20 and the third blow-down valve 21 can realize local manual operation and remote automatic control functions, and the control box is arranged at the outlet of the blow-down pipe, so that an operator can conveniently check the pipe blow-down condition.

The check valve 22 is installed on the annular sewage draining pipe 18, the model of the check valve 22 is H42H-16C-DN200, and the problem of sewage backflow in the outlet pipeline vertical pipe and the overhead chute can be avoided when the pipeline pump 23 stops pumping after the check valve 22 is installed on the annular sewage draining pipe 18 behind the pipeline pump 23.

The pipeline pump 23 is selected from ISG (B)125-160B centrifugal pumps with rated water supply flow rate of 138m³The pump head is 24 meters, the matched power is 15KW, the pipeline pump 23, the second blow-down valve 20 and the third blow-down valve 21 are used for realizing the timing and automatic interlocking control function, the traditional static pressure blow-down mode is changed into a negative pressure forced blow-down mode, the blow-down efficiency can be improved, the blow-down time is shortened, the occupation of personnel is reduced, the labor intensity is reduced, the automatic control level of the chemical oil remover is improved, and the effluent turbidity index of the chemical oil remover is stabilized.

The utility model discloses a chemical degreaser:

a. adding a certain amount of polyaluminium chloride and polypropylene medicament in time according to the increased circulating water amount in proportion (the medicament addition amount can be reasonably increased according to the daily billet yield, namely the medicament amount is determined according to the billet yield);

b. along with the continuous increase of circulating water volume, the flocculation precipitation volume in pipe chute filler 1 and the drip chamber 24 also can increase of different degree, this must change the operation mode, shortens drip chamber blowdown and pipe chute filler and washes the interval time, increases drip chamber sludge discharge, accomplishes row less, arranges on duty.

c. Cleaning force is increased for the filter screen at the outlet of the overflow water returning groove 5, so that the problem of flooding of the overflow toothed plate group 10 caused by blockage of the filter screen is prevented;

d. the newly installed third control valve 21, the pipe pump 23, and the PVC plate 15 in the settling chamber 24 are periodically checked to ensure that the respective parts are operating normally.

The utility model discloses not be limited to above-mentioned embodiment, anybody should learn the structural change who makes under the teaching of the utility model, all with the utility model discloses have the same or close technical scheme, all fall into the utility model discloses an within the protection scope.

The technology, shape and construction parts which are not described in detail in the present invention are all known technology.

Claims

1. A chemical oil remover is characterized by comprising a mixing chamber and a settling chamber, wherein a first water return part and a second water return part are arranged on two sides of the mixing chamber, the first water return part is provided with a first return pipe, a first return water collecting tank and a first filter screen, the second water return part is provided with a second return pipe, a second return water collecting tank and a second filter screen, an inclined pipeline is arranged between the first return pipe and the second return pipe and used for communicating the first return pipe and the second return pipe, and the side surfaces of the first water return part and the second water return part are both connected with an overflow water returning groove so that water in the overflow water returning groove flows through the return pipe at the bottom of the return water collecting tank after entering the return water collecting tank through the filter screens; the lateral wall of drip chamber is equipped with the PVC board, the bottom of drip chamber is equipped with annular blow off pipe, the top of annular blow off pipe is equipped with a plurality of evenly distributed's blowoff hole, the top of the inlet tube of drip chamber is equipped with the sphere agitator, annular blow off pipe is connected with first pipeline, and with first pipeline vertically second pipeline and third pipeline, first pipeline is equipped with first blowoff valve, second blowoff valve and tubing pump, be connected with the third blowoff valve on the second pipeline, be connected with the check valve on the third pipeline.

2. The chemical oil remover according to claim 1, wherein the chemical oil remover is further provided with an overflow toothed plate group and oil baffle plates positioned at two sides of the overflow toothed plate group.

3. The chemical oil remover according to claim 1, wherein a pipe chute filling part and a water distribution port are further arranged in the mixing chamber, and a water baffle plate is arranged between the pipe chute filling part and the water distribution port.

4. The chemical degreaser of claim 1 wherein the top of the mixing chamber is provided with a platform rail.