RU2444395C1 - Multi-zone process module for thin-layer cleaning of major volumes of fluids from mechanical impurities - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to circulation water treatment, processing fluids, coolant-lubricants, detergents, and may be used at metal processing plants at metal cutting, rolling, etc. Module comprises tank with processed fluid accommodating horizontal elements, feed and discharge branch pipes, grids communicated with distribution and intake chambers, guide hoses, floating platform provided with pump, manifold valve with nozzles directed toward aforesaid horizontal elements. Device comprises additionally inclined elements arranged upstream of horizontal elements. Horizontal and inclined elements are made up of stacks made form cellular plastic sections, for example, cellular polycarbonate. Quantity of stacks with horizontal and inclined elements, height and length of bar spacing in every stack is selected while purification degree is defined by the formula and compared with selected value.

EFFECT: higher quality, simplified design and expanded performances.

3 cl, 4 dwg

Description

The invention relates to the field of purification of liquids, in particular large-volume circulating water, as well as process fluids (TFA), cutting fluids (coolant), washing solutions and can be used in metalworking industries for metal forming, cutting and rolling.

A device is known "Integrated technological module for thin-layer cleaning of large volumes of water from mechanical impurities and oil products" (see patent for utility model of the Russian Federation No. 57269. Cl. C02F 1/40. Publish. 10.10. 2006. Bull. No. 28), containing established in containers with treated water, packages of horizontally oriented elements, inlet and outlet pipes, gratings connected to the distribution and reception chambers.

The reasons that impede the achievement of the technical result indicated below when using the known device include the fact that the sediment accumulated on horizontally oriented elements is removed using knives that rotate around the axis by means of a drive. In addition, the known design involves the manufacture of horizontally oriented elements from durable steel sheets from stainless steel.

These circumstances sharply increase the cost of the known cleaning device, and the design of the open tank does not allow the use of these devices in pressure treatment systems.

It is known "Device for cleaning liquids from particles by the deposition method" (see patent for invention No. 1058522. Cl. C01N 15/04. Publ. 30.11.1983) containing a series of parallel inclined plates enclosed between the side walls, a chamber located under the plates for sediment collection. The reasons that impede the achievement of the technical result indicated below when using the known device include the fact that one cleaning step does not provide the required quality of liquid cleaning. For high-quality cleaning of liquids, it is necessary to use several stages of cleaning.

A device is known "Technological module for thin-layer cleaning of large volumes of water from mechanical impurities" (see Patent for the invention of the Russian Federation No. 2372133. Cl. C02F 1/40. Publ. 10.11.2009) containing horizontally oriented elements installed in a tank with treated water, made in the form of an elastic tape, envelopes of support and tension elements installed on the sides of the tank, inlet and outlet pipes, gratings connected to the distribution and reception chambers. In addition, the container on the drain side of the liquid to be cleaned is equipped with guide rods, and a platform made in the form of a float floats along the guide rods on the water surface. The platform itself is equipped with a pump, and a comb with nozzles directed towards the horizontally oriented elements is installed on the upper part of the platform.

The reasons that impede the achievement of the technical result indicated below when using the known device include the fact that with a high degree of contamination of the liquid being cleaned (for example, more than 10 g / l), the time of the liquid cleaning cycle between rinses sharply decreases, which ultimately reduces the efficiency of the process module (quality of cleaning worsens, device performance decreases). In addition, for high-quality cleaning of liquids, it is necessary to use several stages of cleaning.

The essence of the invention lies in the fact that the device is additionally equipped with oblique-oriented elements mounted in front of horizontally oriented elements, while the oblique and horizontally oriented elements are made in the form of packets drawn from sheets of a honeycomb plastic profile, such as polycarbonate. The liquid being cleaned is sent to the inside of the honeycomb polycarbonate sheet. The number of packets m with oblique and horizontally oriented elements located one after another, as well as the clearance height h of the sheets of the honeycomb profile in each packet are set, and the degree of cleaning is determined by the formula

based on a given degree of liquid purification ε _m , physico-chemical state of the liquid and contaminants, where m is the number of packets with oblique and horizontally oriented elements located one after the other (number of cleaning stages); n is the number of fractions of particles; L _j , h _j - the length and height of the gap of the sheets of cellular polycarbonate of the jth stage of the system, m; ρ _W and ρ _Ki - the density of the liquid being cleaned and the average density of the settling complex "solid particle - hydration shell", respectively, kg / m ³ ; g = 9.8 acceleration of gravity, m / s ² ; η — dynamic fluid viscosity coefficient, Pa · s; V is the velocity of the fluid and particles in the process module, m / s; With _and - the initial concentration of sludge in the cleaned liquid, mg / DM ³ ; l - exponent, l≈1; d _кi - equivalent diameter of the i-th complex “solid particle - hydration shell”, m; f _i is the particle frequency of the i-th fraction of mechanical impurities in the initial liquid, C _d is the boundary concentration of mechanical impurities during the additive deposition of particles, mg / dm ³ .

The use of the invention provides the following technical result:

- expanding the scope of the cleaning device,

- improving the efficiency of the device (quality of liquid purification).

The specified technical result during the implementation of the invention is achieved by the fact that the multi-zone technological module for thin-layer cleaning of large volumes of liquids from mechanical impurities contains horizontally oriented elements installed in containers with the liquid to be processed, inlet and outlet pipes, grids connected to distribution and reception chambers, guide rods, a floating platform equipped with a pump, a comb with nozzles directed towards the horizontally oriented elements.

The peculiarity lies in the fact that the device is additionally equipped with oblique-oriented elements mounted in front of horizontally oriented elements, and the oblique and horizontally oriented elements themselves are made in the form of packets drawn from sheets of a honeycomb plastic profile, such as polycarbonate. The cleaned liquid is directed to the inside of the honeycomb sheet.

The number of packets m with oblique and horizontally oriented elements located one after another, as well as the clearance height h of the sheets of the honeycomb profile in each packet are set, and the degree of cleaning is determined by the formula

based on a given degree of fluid purification ε _m , physico-chemical state of the liquid and contaminants.

The analysis of the prior art by the applicant, including a search by patents and scientific and technical sources of information and identification of sources containing information about analogues of the claimed invention, allowed to establish that the applicant did not find an analogue characterized by features identical to all the essential features of the claimed invention. The definition from the list of identified analogues of the prototype as the closest in the set of essential features of the analogue made it possible to identify the set of essential distinguishing features in relation to the applicant's technical result in the claimed invention set forth in the claims.

Therefore, the claimed invention meets the condition of "novelty."

The design of the invention is presented in the drawings (figures 1-4).

Figure 1 - section of the device in the purification mode of the liquid.

Figure 2 - section of the device in the washing mode.

Figure 3 is a fragment of the inner part of the inclined oriented element.

Figure 4 is a fragment of the inner part of a horizontally oriented element.

The liquid purification device consists of a housing 1 with a distribution 2 and a receiving 3 chambers, inlet 4 and 5 outlet pipes, grids 6 and 7, guide rods 8, platform 9, pump 10, combs 11, nozzles 12, valves 13 and 14, overflow pipe 15, a bag 16 composed of sheets of obliquely oriented elements 17 and forming a first cleaning zone, bags 18 and 19 composed of sheets of horizontally oriented elements 20 and forming a second and third cleaning zone.

The device operates as follows.

In cleaning mode. The liquid to be cleaned through the valve 13 (valve 14 is closed) and the inlet pipe 4 is fed into the distribution chamber 2, and then through the grill 6 into the housing 1 of the device. Passing between the sheets of oblique-oriented elements 17 of the package 16, due to gravity, the liquid is cleaned of foreign inclusions that fall on the surface of the sheets 17, accumulate on them, and then, as they accumulate under their own weight, slide along the sheet surface into the lower part of the distribution chamber 2 of the housing 1. Partially purified liquid from the first zone flows into the second zone, and then into the third and so on (depending on the number of calculated zones), where it is purified by gravity. Foreign impurities fall on the surface of the sheets 20. When leaving the last zone, the liquid flows into the overflow pipe 15, and then the pipe 5 is sent to the consumer or further cleaning. When a certain amount of sediment accumulates on the surface of the sheets 20, the valve 13 automatically closes and the valve 14 opens and the device enters the washing mode.

In flushing mode. In this mode, the sediment accumulated in the lower part of the distribution chamber 2 by gravity through the gate valve 14 begins to merge from the housing 1. At this moment, the pump 10 mounted on the platform 9 is turned on, which pressurizes the fluid into the comb 11, and then directs it through the nozzles 12 it into the spaces of horizontally oriented elements, thereby washing away the sediment layer deposited on the surface of the sheets 20.

Going down the guides 8, floating on the surface of the drained liquid, the platform 9 with the pump 10 provide a washing of all the openings of the horizontally oriented elements 20. The washed-off sediment together with the liquid is sent through the valve 14 to the further thickening device.

After the washing mode, the valve 14 closes and the valve 13 opens and thereby the device is transferred to the liquid purification mode.

The filled housing 1 through the nozzle 4, the liquid raises the platform 9 to the upper position and thereby prepares it for the washing mode.

The closed design of the housing 1 expands the capabilities of the device and allows its use in pressure and pressureless systems for cleaning liquids.

The absence of any actuators with electric drive elements simplifies the proposed design of the device and reduces its cost.

The use of a set of oblique and horizontally oriented elements and the creation of several zones for the deposition of foreign inclusions from the liquid allows us to expand the scope of application of the cleaning device and increase its efficiency (quality of liquid cleaning).

The calculation of the design parameter of the device - the h-gap, for various cleaning zones, depending on the given degree of liquid purification ε _m , as well as the physicochemical state of the liquid and contaminants, also increases its efficiency.

An example of the calculation of a single-zone technological module for thin-layer cleaning is presented in table 1, and multi-zone in table 2.

Table 1 Initial data and calculation results of a single-zone technological module of thin-layer cleaning (TGO) Condition number Conditions Dimension Value one 2 3 four one The required concentration of solids in the purified coolant, C _o mg / dm ³ twenty 2 The concentration of solids in the original coolant, C _and mg / dm ³ one hundred 3

The arithmetic mean of the particle size,

μm 10 four The root-mean-square deviation of the arithmetic particle size, σ (Gauss law) μm 3.3 5 TGO productivity, Q m ³ / h one hundred 6 Coolant temperature, T ° C twenty 7 The coefficient of dynamic viscosity of the cleaned coolant, η Pass 0.001 8 The density of the cleaned coolant, ρ _W kg / m ³ 1000 9 The content of the metal component, C _m % one hundred 10 The density of particles of the metal component, ρ _t kg / m ³ 7800

eleven The boundary concentration of additive deposition of particles, With _d mg / dm ³ 40 12 The coefficient of thickness of the hydration shell, k _hg - 0.6 13 We calculate the allowable value [ε]:

fourteen From constructive considerations we accept: m 0.5 - the length of the precipitation partition L; m 0,03 - the value of the gap h; m / s 0.01 - the speed of the coolant in the gap V fifteen We expect: - the concentration of particles of mechanical impurities of the i-th fraction in the original coolant, C and _i ; mg / dm ³ C and _i = C _and f _i is the generalized parameter, R 1 / m ² R = R _to · R _p · R _f · R _a - the degree of purification of particles of mechanical impurities of the i-th fraction, the fineness of purification by parameter d ₅₀

- the concentration of particles of mechanical impurities of the i-th fraction in purified coolant C _oi ; mg / dm ³ C _oi = (1-ε _i) · C _ANDi - the total concentration of particles of mechanical impurities in the purified coolant C _about ; mg / dm ³ C _o = ∑C _oi - the degree of purification of TGO ε

16 Compare the calculated value of ε with the required [ε] - 0.77 <0.9; does not match 17 We carry out the recount; accept the new value of L m one eighteen We carry out a new calculation (see clause 15), compare the new ε with the required value [ε] - 0.895≈0.9; satisfies 19 We calculate the time of continuous cleaning before regeneration t _n h 80

table 2 Calculation of multi-zone (four-zone) TGO Condition number Conditions Dimension Value one

; σ=3,3 мкм; Q=100 м³/ч; Т=20°С; η=0,001 Па·с; ρ_ж=1000 кг/м³; ρ_т=7800 кг/м³; С_д=40 мг/дм³; k_hг=0,6The initial conditions are similar to paragraph 1, table 1: [ε] = 0.9; C _and = 100 mg / dm ³ ; the number of steps in the cleaning system - 4;

; σ = 3.3 μm; Q = 100 m ³ / h; T = 20 ° C; η = 0.001 Pa · s; ρ _W = 1000 kg / m ³ ; ρ _t = 7800 kg / m ³ ; C _d = 40 mg / dm ³ ; k _hg = 0.6 2 We take ε ₁ = ε ₂ = ε ₃ = 0.5, and for the fourth stage we calculate

-

3 For the first three steps we select L; h and V = const for the whole system; calculation and verification of all three stages is carried out similarly to items 10-19 of table 1. V m / s 0.01 L ₁ m 0.5 h _one m 0,063 ε ₁ - 0.502≈0.5; satisfies t _n1 h 91 L ₂ m 0.75 h ₂ m 0,029 ε ₂ - 0.504≈0.5; satisfies t _n2 h 2345 L ₃ m one h ₃ m 0.012 ε ₃ - 0.503≈0.5; satisfies t _n3 h 7312 four The calculation for the 4th stage is similar to the calculation for the previous stages L ₄ one 0.5 h _four m 0.009 ε ₄ - 0.205≈0.2; satisfies t _n4 h 44804 5 We check the system performance by the condition ε _with ≈ [ε] ε _c = 1- (1-0.502) (1-0.504) × (1-0.503) (1-0.205) = 0.903≈0.9; ε _c > [ε]

From table 2 it follows that the gap between the precipitation walls of the first treatment zone corresponds to 0.063 m, the second zone to 0.029 m, the third zone to 0.012 m and the fourth zone to 0.009 m.

Thus, the foregoing description indicates the fulfillment of the following set of conditions when using the claimed invention:

- a tool embodying the claimed invention, in its implementation is intended for the purification of process fluids (TJ), cutting fluids (coolant), washing solutions and can be used in metalworking industries for metal forming, cutting and rolling;

- for the claimed device in the form as described in the stated claims, the possibility of its implementation using the means and methods described in the application is confirmed;

- a tool embodying the claimed invention in the implementation, is able to ensure the achievement of the perceived by the applicant of the assigned technical tasks. Therefore, the claimed invention meets the condition of "industrial applicability".

Claims (3)

1. A multi-zone technological module for thin-layer cleaning of large volumes of liquids from mechanical impurities, containing horizontally oriented elements installed in containers with the liquid to be processed, inlet and outlet pipes, grids connected to distribution and reception chambers, guide rods, a floating platform equipped with a pump, comb with nozzles directed towards horizontally oriented elements, characterized in that the device is additionally equipped with an obliquely oriented They are installed in front of horizontally oriented elements, and the oblique and horizontally oriented elements themselves are made in the form of packets collected from sheets of a honeycomb plastic profile, for example, cellular polycarbonate. 2. The multi-zone technological module according to claim 1, characterized in that the liquid to be cleaned is sent to the inside of the sheet of cellular polycarbonate. 3. The multi-zone technological module according to claim 1, characterized in that the number of packets m with obliquely and horizontally oriented elements arranged one after another, as well as the clearance height h of the sheets of the honeycomb profile in each packet are set, the degree of cleaning is determined by the formula

based on a given degree of fluid purification ε _m , physico-chemical state of the liquid and contaminants,
where m is the number of packages with obliquely and horizontally oriented elements located one after another (the number of cleaning steps); n is the number of fractions of particles; L _j , h _j - the length and height of the gap of the sheets of cellular polycarbonate of the jth stage of the system, m; ρ _W and ρ _Ki - the density of the liquid being cleaned and the average density of the settling complex "solid particle - hydration shell", respectively, kg / m ³ ; g = 9.8 acceleration of gravity, m / s ² ; η — dynamic fluid viscosity coefficient, Pa · s; V is the velocity of the fluid and particles in the process module, m / s; With _and - the initial concentration of sludge in the cleaned liquid, mg / DM ³ ; l - exponent, l≈1; d _кi - equivalent diameter of the i-th complex “solid particle - hydration shell”, m; f _i is the particle frequency of the i-th fraction of mechanical impurities in the initial liquid, C _d is the boundary concentration of mechanical impurities during the additive deposition of particles, mg / dm ³ .

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