CN211189524U - Powdery resource recovery device - Google Patents

Abstract

A powdery resource recovery device is characterized in that hollow fiber membrane filaments, particularly polytetrafluoroethylene hollow fiber membranes, are used as filtering materials, the filtering precision is more than 1000 times higher than that of a traditional bag-type dust collector, the spacing distance between the membrane filaments is 2-20mm, dust blockage is effectively prevented, a back-blowing mechanism consisting of a nozzle and a membrane filament nozzle is arranged, and long-term stable continuous work is guaranteed. The method can be widely used for extracting metals and metal oxides, separating powdery resources from gas mixed with the powdery resources in the industries of cement, plastics and pharmacy, and has high recovery efficiency and low leakage rate.

Description

Powdery resource recovery device

Technical Field

Powdery resource recovery device. In particular to a recovery device for recovering powder resources loaded in flue gas.

Background

Many resources exist in a powder state, particularly in the preparation process, dry preparation is a simpler mode, but the resources in a micro-particle dust state are loaded in flue gas and are difficult to collect, because the resources in the micro-particle dust state are easy to escape and lose and even form pollutants, particularly beryllium, lead, tin, cadmium, zinc, manganese, nickel and other resources, in the smelting process, the particles are extremely small, the value is high, the toxicity is high, and the contradiction between resource collection and pollution control is particularly prominent. In order to avoid the contradiction, a wet process is often adopted, so that the cost is greatly increased, and the resource utilization rate is reduced.

The core problem is to separate these resources from the flue gas carrying them, and the core difficulty is the technical performance problems of efficiency, wind resistance, dust holding capacity, corrosion resistance and high temperature resistance of the filter used for separating the flue gas from the tiny granular resources.

For example, the currently used dust removal and recovery technologies are electrostatic dust removal and bag-type dust removal technologies, the highest reported treatment level is a membrane-coated bag-type dust remover, the filtration effect of the bag-type dust remover can reach 5-7mg/m for cultivation, and although the value is high, the method is not enough in the aspects of resource recovery and pollution treatment. In particular, beryllium and lead metal dusts are highly toxic and must be handled more thoroughly, the most desirable indicator of leakage is at a level below the level of 1-30 ug/m for cultivation under the most stringent standard of 5-7mg/m for cultivation under the most stringent circumstances, with thousands of times of the difference from the ideal target. This indication is only achieved at the level of the so-called "absolute filter" in the art, and the powder resource recovery device in this sense may be referred to as an "absolute powder resource recovery device".

Conventional 13-14 stage high efficiency filters (hape), often used to make "absolute filters" in standard filtration devices, but such hape wind resistance is extremely large; the energy consumption is very high; the dust holding capacity is extremely small, the dust holding capacity is easy to be blocked, the dust holding capacity needs to be replaced frequently, the running cost is extremely high, and the defects cause that the traditional hape is not suitable for manufacturing recovery and filtration equipment of powder resources in the large-scale production process.

The patent application of 'a hollow fiber membrane module for treating high-dust gas and an application structure thereof' (2018209712467) filed by the national intellectual property office in 2018 is accepted. A large number of experiments and field applications show that the technology can reach the level of 1-10 ug/m and can possibly solve the problems if the technology can be used for powdery resource recovery.

Apparently, gas purification and resource recovery are the same problem, but the difference between the two is very clear, the former focuses on gas purity, and the latter pursues recovery of powdery resources. The different points of view may be different in the structure of the device concerned. For example, in the conventional membrane module, the spacing between membrane filaments is very small in pursuit of packing rate, but the membrane module for resource recovery must increase the spacing between membrane filaments appropriately to avoid dust accumulation, which puts new demands on the structure.

Therefore, the absolute recovery device of the powdery resources, which can reach the microgram level, is a new design which needs innovation.

Disclosure of Invention

Aiming at the problems, the invention aims to provide a solution for efficiently separating powdery resource substances from mixed flue gas of gas and powdery resources, and provides a powdery resource recovery device which comprises a membrane component and a cabinet;

wherein the membrane module is characterized in that: the device comprises film filaments, a shell, a pattern plate, a nozzle plate, film filament nozzles, sealing rings and a dust sensor, wherein the film filament nozzles are hollow tubes, all the film filament nozzles penetrate through the pattern plate, the film filaments are fixed at one end of the film filament nozzles one by one, and the other ends of the film filament nozzles are fixed on the pattern plate in a threaded or compression joint mode to form an array; a nozzle plate which is 3-30 mm away from the upward side of the flower plate, wherein a nozzle array is fixed on the nozzle plate, and the nozzles are downward opposite to each central hole penetrating through the film filament nozzle of the flower plate; the pattern plate and the nozzle plate are arranged in the shell, the shell is divided into a high-pressure bin and a low-pressure bin by the nozzle plate, high-pressure air inlets are distributed on the outer wall of the high-pressure bin of the shell, and low-pressure air outlets are distributed on the outer wall of the low-pressure bin of the shell;

the sealing ring is arranged below the pattern plate and combined with the cabinet. I.e. on the upper and lower partitions of the cabinet, known in the trade as the ceiling.

The high-pressure air inlet on the high-pressure bin of the membrane module is connected with a compressed air source through a pulse valve, when compressed air is filled in the high-pressure bin, high-pressure air flow can pass through each nozzle on the nozzle array, and the high-pressure air flow is flushed into the membrane filament mouths corresponding to the nozzles and then enters the inner cavities of the membrane filaments to form back-flushing high pressure, so that powdery resources adsorbed on the outer walls of the membrane filaments are blown down and fall on the funnel opening at the bottom of the lower layer of the cabinet, and the funnel opening is recovered.

The plastic hollow fiber membrane filaments are polytetrafluoroethylene hollow fiber membrane filaments, the diameter of the plastic hollow fiber membrane filaments is 3 mm-20 mm, and the length of the plastic hollow fiber membrane filaments is 0.3 m-2 m; the diameter of the membrane assembly is 50 mm-300 mm, the number of membrane filaments of each membrane assembly is 30-1000, and the distance between the membrane filaments is 2 mm-20 mm;

the membrane modules form a recovery array; the membrane recycling device comprises a membrane assembly, a recycling array, a cabinet and a membrane filament part, wherein the recycling array is installed in the cabinet, the cabinet is divided into an upper layer and a lower layer, the shell part of the membrane assembly is arranged on the upper layer of the cabinet, and the membrane filament part of the membrane assembly is arranged on the lower layer of the cabinet.

Drawings

Fig. 1 is a schematic view showing an example of a high-temperature membrane module used in the powdery resource recovery apparatus according to the present invention.

Fig. 2 is a schematic view of a design scheme of a cabinet used in the powdery resource recovery device according to the present invention.

Detailed Description

An embodiment example of a high-temperature membrane module used in the powdery resource recovery device according to the present invention is shown in fig. 1. But this is not the only design.

Wherein

(1) The high-pressure air inlet is arranged on a high-pressure bin and is used for connecting a high-pressure back-blowing compressed air source, and pulse high-pressure back-blowing air is received through a control valve.

(2) Is the upper half of the shell and is used for forming a high-pressure cabin.

(3) Is an array of nozzles, each nozzle facing the upper half of a film filament nozzle.

(4) Is a flower plate, and a membrane silk mouth array is arranged on the flower plate.

(5) Is the lower half part of the shell and is used for forming a low-pressure bin, and low-pressure air outlets (6) are distributed on the bin wall of the low-pressure bin.

(6) Is a low pressure outlet.

(7) The membrane filament nozzle is a hollow tube, the upper end of the membrane filament nozzle is provided with threads and screwed on the pattern plate, the other end of the membrane filament nozzle is fixed with membrane filaments, and each membrane filament can be screwed off and replaced together with the membrane filament nozzle.

(8) Is a sealing ring used for sealing the joint part of the membrane component and the cabinet.

(9) Is a protective steel cage.

(10) Is a membrane thread.

(01) Each membrane component is provided with a dust sensor independently and used for monitoring the working state of the membrane component.

Fig. 2 is a perspective schematic view of a cabinet design scheme adopted in the powdery resource recovery device according to the present invention, but this scheme is not the only design scheme.

Wherein

(11) Is the cabinet body of the cabinet.

(12) Is the upper layer of the cabinet, and the upper half part of the membrane module array is arranged in the space and is provided with air with negative pressure.

(13) Is a funnel mouth

(14) Is the lower layer of the cabinet, and the lower half part of the membrane component array, mainly the membrane filament array, is arranged in the space.

The small experimental device manufactured according to the purpose of the invention is used for carrying out online experiments on a zinc oxide production line, and experiments prove that the upper limit of the working temperature of the high-temperature membrane component can reach 300 ℃, the high-temperature membrane component can work for a long time under the condition of 210 ℃, and the phenomenon of blockage can not occur after long-term operation. Dust collection rate can reach more than 99.999%, reveal dust PM2.5 and be 2ug/m high flowering plants, PM10 is 0ug/m high flowering plants, windage is less than 900 pa.

Has the advantages of

The powdery resource recovery device designed according to the purpose of the present invention can work under high temperature conditions; the wind resistance of the bag-type dust collector is equivalent to that of a common bag-type dust collector; the interception index is improved by 1000-10000 times, and the method can be widely used in the powdery resource recovery occasion of dry smelting, completely and cleanly recover the resource, and thoroughly avoid the pollution caused by dust leakage. Has great economic value and social value.

Claims (1)

1. A powdery resource recovery device comprises a membrane component and a cabinet;

wherein the membrane module is characterized in that: the device comprises film filaments, a shell, a pattern plate, a nozzle plate, film filament nozzles, sealing rings and a dust sensor, wherein the film filament nozzles are hollow tubes, all the film filament nozzles penetrate through the pattern plate, the film filaments are fixed at one end of the film filament nozzles one by one, and the other ends of the film filament nozzles are fixed on the pattern plate in a threaded or compression joint mode to form an array; a nozzle plate which is 3-30 mm away from the upward side of the flower plate, wherein a nozzle array is fixed on the nozzle plate, and the nozzles are downward opposite to each central hole penetrating through the film filament nozzle of the flower plate; the pattern plate and the nozzle plate are arranged in the shell, the shell is divided into a high-pressure bin and a low-pressure bin by the nozzle plate, high-pressure air inlets are distributed on the outer wall of the high-pressure bin of the shell, and low-pressure air outlets are distributed on the outer wall of the low-pressure bin of the shell; the sealing ring is arranged below the pattern plate and combined with the cabinet; the plastic hollow fiber membrane filaments are polytetrafluoroethylene hollow fiber membrane filaments, the diameter of the plastic hollow fiber membrane filaments is 3 mm-20 mm, and the length of the plastic hollow fiber membrane filaments is 0.3 m-2 m; the diameter of the membrane assembly is 50 mm-300 mm, the number of membrane filaments of each membrane assembly is 30-1000, and the distance between the membrane filaments is 2 mm-20 mm;

the membrane modules form a recovery array; the membrane recycling device comprises a membrane assembly, a recycling array, a cabinet and a membrane filament part, wherein the recycling array is installed in the cabinet, the cabinet is divided into an upper layer and a lower layer, the shell part of the membrane assembly is arranged on the upper layer of the cabinet, and the membrane filament part of the membrane assembly is arranged on the lower layer of the cabinet.

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