CN215610867U

CN215610867U - Can invariable OG mud whitewashing concentration's device

Info

Publication number: CN215610867U
Application number: CN202122078739.2U
Authority: CN
Inventors: 高鹏; 戚义龙; 樊晶莹; ***
Original assignee: Maanshan Iron and Steel Co Ltd
Current assignee: Maanshan Iron and Steel Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-01-25
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a device capable of keeping OG mud guniting concentration constant, which comprises an OG mud inlet pipeline, a guniting pipeline and a guniting pump arranged on the guniting pipeline, and further comprises a stirring tank, a weighing pressure head, a clear water replenishing inlet pipeline and a stirring structure for slurry in the stirring tank, wherein pipe orifices of the OG mud inlet pipeline and the clear water replenishing inlet pipeline are arranged corresponding to the top opening of the stirring tank, the stirring tank is arranged on the weighing pressure head, and a liquid level meter is arranged in the stirring tank. The concentration of guniting in the sintering mixture or the mixer can be kept constant, so that the accurate calculation of the moisture brought into the sintering mixture by OG guniting during normal sintering production is realized, and the accurate control and adjustment of water addition of the mixer are facilitated; the moisture fluctuation in the sintering process is reduced, the stable progress of the subsequent sintering process is supported, and the undisturbed comprehensive utilization of the OG mud in the sintering process is realized.

Description

Can invariable OG mud whitewashing concentration's device

Technical Field

The utility model relates to the technical field of steelmaking sludge treatment, in particular to a device capable of keeping OG sludge guniting concentration constant.

Background

The steelmaking wastewater is generated after wet dedusting of the converter, and the smoke dust contained in the wastewater is called steelmaking sludge. The steelmaking sludge contains 40-50% of iron content and valuable elements such as Ca and the like, so the recovery and utilization of the steelmaking sludge wastewater not only can save water resources, but also has great significance for the recovery and utilization of the valuable elements. Because the steelmaking wastewater has high alkalinity and high hardness, and the steelmaking sludge contained in the wastewater has fine granularity and high viscosity, the large-scale utilization of the steelmaking wastewater, especially the replacement of clear water and the reasonable addition of the steelmaking sludge wastewater are difficult points and hot points of the current research.

At present, the treatment process of adding steel-making sludge by sintering mainly comprises a mud cake method and a mud slurry method. However, in view of the current research progress, these methods mainly have the following disadvantages: (1) the sludge can be dehydrated to below 13 percent, the sludge has loose property, the transportation and the process production addition are easy to realize, but the sludge treatment time is long, the investment of manpower and material resources is large, the environmental pollution can be further expanded, and the utilization cost of the sludge is very high. (2) When the sludge is dehydrated to 30-40%, the treated sludge is not leaked in transportation, is not dusted in transportation and is beneficial to environmental maintenance, but the sludge has high viscosity, and is difficult to use common batching equipment during adding. Firstly, glue easily stifled discharge gate and join in marriage and add equipment, secondly the material glues a dispersity poor, and is inhomogeneous when participating in the batching, leads to the fact certain influence to production stability. (3) The steel-making sludge wastewater is added by adopting a slurry method, when the sludge concentration is low, the sludge amount used by sintering is small, and a large amount of sludge is easy to accumulate. When the sludge concentration is high, the blockage of pipelines and spray heads is easily caused. Meanwhile, because the concentration change of the steelmaking sludge is large, the moisture control fluctuation of the sintering mixture can be caused due to the concentration change of the steelmaking sludge when the steelmaking sludge is directly sprayed and used in the sintering process, and the adverse effect can be generated on the sintering process.

If chinese patent CN205616936U discloses a steelmaking mud dosing unit of steel enterprise, by the sludge impoundment, the defeated grey machine of double helix, a plurality of agitator pump, stock sludge pump and batching belt are constituteed, the defeated grey machine of double helix sets up respectively in the sludge impoundment both sides with the batching belt, set up two augers in the defeated grey machine of double helix, set up a plurality of shower nozzles on the inner wall of the defeated grey machine import of double helix, the defeated grey machine of double helix sets up the arc export, agitator pump evenly distributed is in the sludge impoundment, the export of stock sludge pump links to each other with the batching belt. The chinese patent application CN108070714A discloses a method for treating sludge by using a metallurgical sintering process, which comprises the following steps: (A) sludge pretreatment: dehydrating the sludge; (B1) removing non-free water: mixing and reacting quicklime and the dewatered sludge to obtain a sludge mixture; (C1) the material preparation step: mixing the obtained sludge mixture with other raw materials, and uniformly mixing to obtain a sintering mixture; (D) and (3) uniformly mixing and granulating: mixing the sintering mixture by a mixer for the first time and the second time to obtain a sintering and mixing material; (E) sintering: and putting the sintering mixture into a sintering machine trolley for sintering. Chinese patent CN109762984B discloses a process for treating sludge produced by adding steel-making during sintering, which comprises using iron ore powder and sludge as main raw materials, limestone and dolomite as flux, coke powder and coal powder as fuel, and waste water and clear water as added water, adding sludge into sintering process, wherein the metallurgical properties of the obtained sintered ore are that the softening starting temperature of the sintered ore can reach 1210 deg.C, the softening temperature is 110 deg.C, the reducibility can reach 78%, and the low-temperature reduction pulverization is 63%.

The above methods all have certain disadvantages. If the method is not suitable for a common sintering plant, the existing common sintering process needs to be modified if the method is adopted, so that the economical efficiency and the practicability are limited; meanwhile, the negative effects of insufficient uniform mixing, difficult stable control of sintering moisture, homogeneity of sintered ores and the like still exist.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a device capable of keeping the OG mud spraying concentration constant, which can keep the concentration of the OG mud spraying into a sintering mixture or a mixer constant.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

this but invariable OG mud whitewashing concentration's device, include OG mud inlet pipeline, whitewashing pipeline and establish the whitewashing pump on whitewashing pipeline, still include agitator tank, the pressure head of weighing, clear water moisturizing inlet pipeline and be arranged in the stirring tank stirring structure of mud, OG mud inlet pipeline and clear water moisturizing inlet pipeline's the equal open-top setting that corresponds the agitator tank of mouth of pipe, the agitator tank is established on the pressure head of weighing, be equipped with the level gauge in the agitator tank.

Further or preferred:

and electric valves are arranged on the OG mud inlet pipeline and the clean water replenishing inlet pipeline.

The top of agitator tank is equipped with supporting platform, OG mud inlet pipeline and clear water moisturizing inlet pipeline establish on supporting platform.

And the top of the stirring tank is provided with a buffer baffle corresponding to the pipe orifices of the OG mud inlet pipeline and the clear water replenishing inlet pipeline.

The liquid level meter is provided with a low liquid level value, a liquid level central value and a high liquid level value, and is connected with the electric valve.

Stirring structure includes agitator tank driving motor, (mixing) shaft and establishes at the epaxial stirring vane of stirring, agitator tank driving motor establishes on supporting platform, and the upper end of (mixing) shaft links to each other with agitator tank driving motor's pivot, and stirring vane is arranged in the agitator tank.

Compared with the prior art, the utility model has the following advantages:

the device capable of keeping the OG mud guniting concentration constant is reasonable in structural design, and can keep the concentration of guniting in a sintering mixture or a mixer constant, so that the accurate calculation of water brought into the sintering mixture by OG guniting during normal sintering production is realized, and the accurate control and adjustment of water added by the mixer are facilitated; the moisture fluctuation in the sintering process is reduced, the stable progress of the subsequent sintering process is supported, and the undisturbed comprehensive utilization of the OG mud in the sintering process is realized.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic view of the structure of the apparatus of the present invention.

In the figure:

the system comprises an OG mud inlet pipeline, an electric valve I, an agitation tank driving motor, a clear water replenishing inlet pipeline, an electric valve II, an electric valve 6, a supporting platform, a buffer baffle 7, a liquid level meter 8, an agitation tank 9, an agitation blade 10, a weighing pressure head 11, a guniting pipeline 12, a guniting pipeline 13 and a guniting pump 14.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

As shown in figure 1, the device capable of keeping OG mud guniting concentration constant comprises an OG mud inlet pipeline 1, a guniting pipeline 13, a guniting pump 14 arranged on the guniting pipeline, a stirring tank 9, a weighing pressure head 11, a clean water replenishing inlet pipeline 4 and a stirring structure for slurry in the stirring tank.

The mouth of pipe of OG mud inlet pipe way and clear water moisturizing inlet pipe all corresponds the open-top setting of agitator tank, and the bottom export of guniting pipeline through guniting pipeline soft 12 connection agitator tank, the agitator tank is established on weighing the pressure head, is equipped with level gauge 8 in the agitator tank.

A liquid level meter is arranged in the stirring tank and used for detecting the liquid level of the OG slurry in real time, and detection data of the liquid level meter is used for adjusting and controlling the concentration of the OG slurry; the agitator tank is fixed in on the weighing pressure head, and its weighing pressure head is used for real-time detection agitator tank and jar interior OG mud liquid's the total weight.

An electric valve I2 is arranged on the OG mud inlet pipeline, the OG mud inlet pipeline is connected with the OG mud concentration tank, and an electric valve I is arranged on the pipeline and used for controlling slurry feeding of the OG mud into the stirring tank; be equipped with motorised valve II 5 on the clear water moisturizing inlet line, realize the regulation of OG concentration in the agitator tank through controlling its moisturizing volume.

A supporting platform 6 is arranged at the top of the stirring tank, and the OG mud inlet pipeline and the clean water replenishing inlet pipeline are arranged on the supporting platform; the stirring structure comprises a stirring tank driving motor 3, a stirring shaft and stirring blades 10 arranged on the stirring shaft, wherein the stirring tank driving motor is arranged on the supporting platform, the upper end of the stirring shaft is connected with a rotating shaft of the stirring tank driving motor, and the stirring blades are positioned in the stirring tank; the structure is compact.

The top of agitator tank corresponds OG mud inlet pipeline and the mouth of pipe of clear water moisturizing inlet pipeline and is equipped with buffer stop 7, and job stabilization is reliable.

A low liquid level value, a liquid level central value and a high liquid level value are arranged in the liquid level meter 8, and the liquid level meter is connected with the electric valve and participates in the control of OG mud slurry feeding and clear water replenishing; and tracking and calculating the bulk density of the OG mud according to the volume calculated by the weighing value of the stirring tank and the indicating value of the liquid level meter, and further tracking and calculating the corresponding concentration value of the OG mud.

The OG mud slurry feeding concentration after concentration in the concentration tank generally fluctuates between 20% and 35%, and the OG mud concentration target value adjusted in the above mode is 20% to 21%. When the indication value of the liquid level reaches the central value, the electric valve on the clean water replenishing inlet pipeline is controlled to be opened in an interlocking mode to replenish clean water in the stirring tank, at the moment, the control program automatically tracks the trend of the calculated concentration value according to the calculation formula in real time, and when the OG mud concentration value in the stirring tank reaches the set target value, the electric valve on the clean water replenishing inlet pipeline is closed. And then interlocking and opening the electric valve to finely adjust the concentration and supplement water when the OG mud concentration is more than the target value of 0.5%, and repeatedly supplementing clear water according to the method when the liquid level meter does not reach a high level value so as to realize that the OG mud concentration in the stirring tank is always controlled at a target control value. And when the liquid level meter reaches a high liquid level value, the electric valve on the OG mud inlet pipeline is controlled in an interlocking mode to close to stop slurry feeding.

Preferably, the agitator tanks are provided in 2 sets, one for each other. And the spare stirring tank is used for adjusting the approved concentration by feeding OG mud into the slurry and supplementing water, and the stirring tank is used for adjusting the concentration to a target value by spraying the slurry into the sintered mixture or the mixer normally. The constant concentration of the slurry sprayed into the sintering mixture or the mixer can be realized after the control according to the method

The device capable of keeping the OG slurry spraying concentration constant is reasonable in structural design, and can keep the concentration of the slurry sprayed into a sintering mixture or a mixer constant, so that the accurate calculation of the moisture brought into the sintering mixture by OG slurry spraying during normal sintering production is realized, and the accurate control and adjustment of water added into the mixer are facilitated; the moisture fluctuation in the sintering process is reduced, the stable progress of the subsequent sintering process is supported, and the undisturbed comprehensive utilization of the OG mud in the sintering process is realized.

The control method comprises the following specific steps:

firstly, putting all parts of the device in place and preparing before assembly;

secondly, connecting an OG sludge inlet pipeline with an OG sludge concentration tank, wherein an electric valve I is arranged on the pipeline and is used for controlling slurry feeding of the OG sludge into the stirring tank;

step three, OG sludge generated in the steel mill is conveyed to an OG sludge receiving system in a sintering process through a pipeline, wherein the concentration of OG supplied materials is generally 7-13%, and the concentration of OG supplied materials fluctuates generally 20-35% after being concentrated by a concentration tank;

step four, the stirring tank is provided with a clear water replenishing inlet pipeline and an electric valve II, and the OG concentration in the stirring tank is adjusted by controlling the water replenishing amount of the electric valve II;

fifthly, a buffer baffle is arranged at the position below the outlet ends of the OG mud inlet pipeline and the clear water replenishing inlet pipeline, and the buffer baffle is fixedly connected with the supporting platform;

sixthly, stirring blades and a stirring tank driving motor are arranged in the stirring tank, and the stirring tank driving motor is fixed on the supporting platform;

seventhly, a liquid level meter is arranged in the stirring tank and used for detecting the liquid level of the OG slurry in the stirring tank in real time, and detection data of the liquid level meter is used for adjusting and controlling the concentration of the OG slurry in the stirring tank;

eighthly, fixing the stirring tank on 3 weighing pressure heads, wherein the weighing pressure heads are used for detecting the total weight of the OG slurry in the stirring tank and the OG slurry in the stirring tank in real time, and the weight values detected by the weighing pressure heads are subjected to mean value processing and are used for adjusting and controlling the concentration of the OG slurry in the stirring tank;

ninthly, connecting the lower part of the stirring tank with a guniting pipeline through flexible connection of the guniting pipeline, and spraying OG mud in the stirring tank onto materials on a sintering mixture feeding belt or into a sintering mixer through a guniting pump to participate in sintering, uniformly mixing, granulating and subsequent sintering;

step ten, the buffer baffle plate is used for clearing up the acting force of the stirring tank when OG mud and clean water are injected into the stirring tank, and meanwhile, the stirring tank is connected with a subsequent slurry spraying pipeline through flexible connection of the slurry spraying pipeline, so that the total weight of the stirring tank and the OG mud liquid in the stirring tank, which is detected by the weighing pressure head, is not influenced by the external force factor, and the total weight of the OG mud liquid is ensured to be accurate;

step eleven, further, a control method for the constant OG mud guniting concentration is explained in detail.

Step twelve, obtaining the corresponding relation between different concentrations of OG mud and the bulk density of the OG mud according to a test method, wherein the specific test result is as follows;

a calculation formula for obtaining the concentration of OG mud can be derived:

OG mud concentration (%) -64.831 × specific gravity-55.871 formula 1

Step thirteen, the specific gravity can be obtained by calculating the weighing average value Z of the weighing pressure head 11 of the stirring tank 9 and the indicating value of the corresponding liquid level meter 8. The calculation formula is as follows:

ρ＝(Z-Z₀)/π*R²h formula 2

Wherein rho is the measured bulk density t/m3, Z is the weight average value t of a pressure head, Z0 is the weight t of an empty stirring tank and a liquid level meter, R is the radius m of the stirring tank, and H is the indication value m of the liquid level meter;

step fourteen, the result of the formula 2 is brought into the formula 1, and the concentration value of OG mud in the stirring tank can be obtained in real time;

fifteen, the liquid level meter is provided with a low liquid level value, a liquid level center value and a high liquid level value and participates in the control of OG mud slurry feeding and clear water replenishing; specifically, when the liquid level reaches a low level value, an electric valve I on an OG mud inlet pipeline is controlled to be opened in an interlocking mode to feed slurry into the stirring tank;

sixthly, when the indication value of the liquid level reaches the central value, the electric valve II on the clean water replenishing inlet pipeline is controlled to be opened in an interlocking mode to replenish clean water in the stirring tank, and meanwhile the corresponding replenishing flow of the clean water replenishing inlet pipeline when the electric valve II is opened is larger than the slurry inlet flow of the electric valve I on the OG mud inlet pipeline 1 when the electric valve I is opened, so that the OG mud concentration in the stirring tank is adjusted in real time;

seventhly, after the OG sludge is concentrated by the concentration tank, the slurry inlet concentration of the OG sludge generally fluctuates between 20% and 35%, and the OG sludge concentration target value adjusted in the mode is 20% to 21%. And when the indication value of the liquid level reaches the central value, the electric valve II on the clean water replenishing inlet pipeline is controlled to be opened in an interlocking mode to replenish clean water in the stirring tank, at the moment, the control program automatically tracks the trend of the calculated concentration value according to the calculation formula in real time, and the electric valve II on the clean water replenishing inlet pipeline is closed when the OG mud concentration value in the stirring tank reaches the set target value. And then interlocking and opening an electric valve II to finely adjust the concentration and supplement water when the OG mud concentration is more than the target value of 0.5%, and repeatedly supplementing clear water according to the method when the liquid level meter does not reach a high level value so as to realize that the OG mud concentration in the stirring tank is always controlled at a target control value.

Eighteen, further, when the liquid level meter reaches a high liquid level value, closing the electric valve I on the OG mud inlet pipeline 1 in an interlocking control mode to stop slurry feeding.

And nineteen steps, 2 groups of stirring tanks are arranged and are mutually standby. And the spare stirring tank is used for adjusting the approved concentration by feeding OG mud into the slurry and supplementing water, and the stirring tank is used for adjusting the concentration to a target value by spraying the slurry into the sintered mixture or the mixer normally. The concentration of the slurry sprayed into the sintering mixture or the mixer can be constant after the control according to the method.

And step twenty, the flow of the guniting to the sintering mixture or the mixer can be obtained according to the accumulated liquid level drop value. Therefore, the accurate calculation of the moisture brought into the sintering mixture by OG guniting during normal sintering production is realized, and the accurate control and adjustment of the water added by the mixer are facilitated. Reduce the water fluctuation in the sintering process and support the stable progress of the subsequent sintering process.

The above-mentioned features are merely for describing preferred embodiments of the present invention and may be arbitrarily combined to form a plurality of embodiments of the present invention.

The utility model is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the utility model is not limited by the above-mentioned manner, and it is within the scope of the utility model to adopt various insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. The utility model provides a device that can invariable OG mud whitewashing concentration, includes OG mud inlet pipe way, whitewashing pipeline and establishes the guniting pump on the whitewashing pipeline, its characterized in that: still include the agitator tank, weigh pressure head, clear water moisturizing inlet pipeline and be arranged in the stirring tank stirring structure of mud, the top opening setting of the equal agitator tank that corresponds of mouth of pipe of OG mud inlet pipeline and clear water moisturizing inlet pipeline, the agitator tank is established on weighing the pressure head, be equipped with the level gauge in the agitator tank.

2. The apparatus for controlling OG slurry guniting concentration according to claim 1, wherein: and electric valves are arranged on the OG mud inlet pipeline and the clean water replenishing inlet pipeline.

3. The apparatus for controlling OG slurry guniting concentration according to claim 1, wherein: the top of agitator tank is equipped with supporting platform, OG mud inlet pipeline and clear water moisturizing inlet pipeline establish on supporting platform.

4. The apparatus for controlling OG slurry guniting concentration according to claim 1, wherein: and the top of the stirring tank is provided with a buffer baffle corresponding to the pipe orifices of the OG mud inlet pipeline and the clear water replenishing inlet pipeline.

5. The apparatus for controlling OG slurry guniting concentration according to claim 2, wherein: the liquid level meter is provided with a low liquid level value, a liquid level central value and a high liquid level value, and is connected with the electric valve.

6. The apparatus for controlling OG slurry guniting concentration according to claim 3, wherein: stirring structure includes agitator tank driving motor, (mixing) shaft and establishes at the epaxial stirring vane of stirring, agitator tank driving motor establishes on supporting platform, and the upper end of (mixing) shaft links to each other with agitator tank driving motor's pivot, and stirring vane is arranged in the agitator tank.