Rare and precious metal ore smelting waste gas treatment device
By combining a multi-stage reverse-jet scrubbing tower and an activated carbon adsorber, the problem of treating oily volatile organic compounds in the waste gas from rare and precious metal ore smelting was solved, achieving a highly efficient waste gas purification effect and meeting emission standards.
Patent Information
- Application Number
- CN202422904006.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-26
AI Technical Summary
Existing technologies are insufficient to effectively treat the oil-containing volatile organic compounds generated during the smelting of rare and precious metal ores, resulting in exhaust gases failing to meet relevant emission standards.
The treatment device, which combines a multi-stage reverse-jet scrubbing tower and an activated carbon adsorber, includes a fan, a fireproof buffer box, a condensation recovery system, primary and secondary reverse-jet scrubbing towers, adsorbers, and an induced draft fan. It removes volatile organic compounds through a multi-stage washing and adsorption process.
It achieved a volatile organic compound removal rate of over 90%, and the emission concentration of non-methane total hydrocarbons was ≤120mg/m3, meeting emission standards and significantly improving treatment efficiency.
Smart Images
Figure CN223517253U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of waste gas treatment, and particularly relates to a rare and precious metal ore smelting waste gas treatment device. BACKGROUND
[0002] In the rare and precious metal ore smelting process, the raw materials need to be roasted and pretreated in the roasting workshop, and the dust of the slag, the oil-containing water vapor, and the volatile organic matter are discharged with the tail gas. At the same time, non-polar hydrocarbon oils (such as diesel oil, kerosene, etc.) are often mixed in the ore powder as collectors for flotation. Therefore, in the mineral drying process, kerosene volatilizes under heat, forms kerosene water vapor with water vapor, and also accompanies volatile organic gases with obvious odor. For this, the enterprises often use dust collectors to treat the roasting tail gas, but the device only has an effect on dust removal, and the treatment effect on oil-containing volatile organic matter is very poor, which cannot meet the relevant emission standards. UTILITY MODEL CONTENTS
[0003] Therefore, the utility model wants to solve the technical problem, provides a rare and precious metal ore smelting waste gas treatment device, so that the oil-containing waste gas generated in the roasting workshop meets the relevant emission standards.
[0004] To solve the above technical problems, the utility model adopts the technical scheme of:
[0005] A rare and precious metal ore smelting waste gas treatment device, comprising: a fan connected with a waste gas collecting pipeline, a fireproof buffer tank connected with the fan, a condensation recovery system connected with the fireproof buffer tank, a first-stage reverse spray scrubbing tower connected with the condensation recovery system, a second-stage reverse spray scrubbing tower connected with the first-stage reverse spray scrubbing tower, an adsorber connected with the second-stage reverse spray scrubbing tower, a draft fan connected with the adsorber, and an exhaust cylinder connected with the draft fan.
[0006] Optionally, a wind pressure measuring hole is arranged on the waste gas collecting pipeline, on the front and rear main pipes of the fan, and on the exhaust cylinder.
[0007] Optionally, the condensation recovery system comprises a water-cooled tube condenser.
[0008] Optionally, the first-stage reverse spray scrubbing tower and the second-stage reverse spray scrubbing tower each comprise a tower body, and a cyclone plate, a spray layer, a packing layer, and a demisting layer arranged in the tower body, the spray layer is 3 layers, a plurality of atomizing nozzles are arranged on each spray layer, the atomizing nozzles are connected with a scrubbing liquid circulating pump, the scrubbing liquid circulating pump is a vertical anti-idling chemical pump, the packing layer is provided with hollow spheres, and the demisting layer is provided with a demister.
[0009] Optionally, the first-stage reverse spray scrubbing tower and the second-stage reverse spray scrubbing tower are respectively provided with an automatic liquid supplementing system, and the liquid supplementing includes a detergent and tap water.
[0010] Optionally, the adsorber is an activated carbon adsorber.
[0011] Compared with the prior art, the beneficial effects of the present application are as follows:
[0012] The present application provides a rare and precious metal ore smelting waste gas treatment device based on the above technical solutions, wherein the waste gas components are mainly volatile organic compounds generated in the roasting workshop, which can be summarized as non-methane total hydrocarbons, and the highest emission concentration of non-methane total hydrocarbons in the exhaust cylinder after treatment by the device is ≤120mg / m 3 , which meets the relevant emission standards, and the treatment efficiency is more than 90%, with remarkable effect. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0014] Figure 1 The present application is a rare and precious metal ore smelting waste gas treatment device structure schematic diagram;
[0015] Among them, 1, fan;2, fireproof buffer tank;3, condensation recovery system;4, first-stage reverse spray scrubbing tower;5, second-stage reverse spray scrubbing tower;6, adsorber;7, induced draft fan;8, exhaust cylinder;9, automatic liquid supplementing system. DETAILED DESCRIPTION
[0016] In order to better understand the present application, the following will further clearly explain the content of the present application combined with the embodiments, but the protection content of the present application is not limited to the following embodiments. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present application. However, it is obvious for those skilled in the art that the present application can be implemented without one or more of these details.
[0017] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0018] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0019] As Figure 1 shown, a rare and precious metal smelting waste gas treatment device, comprising: with the waste gas collection pipeline connected fan 1, with fan 1 connected with fire buffer tank 2, with fire buffer tank 2 connected with condensation recovery system 3, with condensation recovery system 3 connected with the first reverse spray scrubber 4, with the first reverse spray scrubber 4 connected with the second reverse spray scrubber 5, with the second reverse spray scrubber 5 connected with adsorber 6, and with adsorber 6 connected with induced draft fan 7, induced draft fan 7 connected with exhaust cylinder 8.
[0020] Thus, the rare and precious metal smelting waste gas is discharged by fan 1, first enters the fire buffer tank 2 for pressure stabilization, and then enters the subsequent treatment process. Since the waste gas temperature at the outlet of fan 1 is high (about 80℃), the effect of direct washing and absorption is poor. Therefore, the waste gas discharged from the fire buffer tank 2 first enters the condensation recovery system 3, so that the waste gas temperature is reduced to below 10℃, and then enters the first reverse spray scrubber 4. In the first reverse spray scrubber 4, the scrubbing agent is used, and under the interaction of various forces such as the impact of upward high-speed airflow, the buoyancy of liquid and its own gravity, the spherical packing in the tower is suspended to form turbulence, rotation and mutual collision, causing close contact between gas and liquid, further mass transfer and absorption, so that volatile organic compounds in the waste gas can be removed, and then enter the second reverse spray scrubber 5 for further treatment. The removal rate of volatile organic compounds by the two-stage scrubber can reach 85% or more. After absorption treatment by the two-stage reverse spray scrubber, the waste gas enters the mist eliminator to remove the residual water mist in the waste gas, and then enters the activated carbon adsorber 6 to further purify the treatment by using the high adsorption property of activated carbon. The removal rate of volatile organic compounds can reach 90% or more, and the waste gas can be discharged after meeting the standard after the combination of the above treatment processes.
[0021] In some specific embodiments of the present application, a wind pressure measuring hole is arranged on the waste gas collection pipeline, on the front and rear main pipes of fan 1, and on the exhaust cylinder 8. In this way, the pressure distribution of the pipeline can be determined to adjust the system wind pressure; the performance and working state of fan 1 can be determined; and the emission concentration of the purified gas can be determined.
[0022] In some specific embodiments of the present application, the condensation recovery system 3 comprises a water-cooled tube condenser. Based on this, the condensation recovery system 3 uses refrigeration technology to cool the waste gas containing volatile organic compounds to a temperature lower than its condensation point, so that it changes from gas to liquid, thereby realizing the recovery of various volatile organic compound (VOCs) gases. This method has the advantages of simple process, good performance, and recovered material directly as oil products.
[0023] In some specific embodiments of the utility model, the first reverse spray washing tower 4 and the second reverse spray washing tower 5 all include: a tower body, and a cyclone plate, a spray layer, a filler layer and a demisting layer arranged in the tower body, the spray layer is 3 layers, a plurality of atomizing nozzles are arranged on each spray layer, the atomizing nozzles are connected with a washing liquid circulating pump, the washing liquid circulating pump is a vertical anti-idling chemical pump, the filler layer is provided with hollow spheres, and the demisting layer is provided with a demister. Through the cooperation of the above two reverse spray washing towers, the removal rate of volatile organic compounds can reach 85% and above.
[0024] In some specific embodiments of the utility model, the first reverse spray washing tower 4 and the second reverse spray washing tower 5 are respectively provided with an automatic liquid supplementing system 9, and the supplementing liquid includes a detergent and tap water. Two middle and low liquid supplementing level points are set in the automatic liquid supplementing system 9, when the liquid level of the washing tower is lower than the middle liquid level point, the automatic detergent supplementing function is realized first, and when the liquid level of the washing tower is lower than the low liquid level point, the automatic tap water supplementing function is started.
[0025] In some specific embodiments of the utility model, the adsorber 6 is an activated carbon adsorber 6. Efficient adsorption carbon bricks are adopted to further adsorb and purify volatile organic compounds.
[0026] The treatment device is used for a rare metal production line of an enterprise, the volatile organic compound concentration generated in a workshop is measured as 290mg / m 3 , after treatment, the average emission concentration of non-methane total hydrocarbon obtained by multi-point monitoring of the exhaust cylinder 8 is 27mg / m 3 , meets the relevant emission standard regulations, the treatment efficiency is 90.7%, and the treatment effect is remarkable.
[0027] Finally, it is explained that the above examples are only used to illustrate the technical scheme of the utility model and not limit, other modifications or equivalent replacements of the technical scheme of the utility model made by the ordinary skill in the art should be covered in the claim range of the utility model.
[0028] The above are only preferred embodiments of the utility model, and are not used to limit the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection range of the utility model.
Claims
1. A device for treating exhaust gas from smelting of rare and precious metal ores, characterized in that: The application relates to a waste gas collection pipeline, a fan connected with the waste gas collection pipeline, a fireproof buffer tank connected with the fan, a condensate recovery system connected with the fireproof buffer tank, a first-stage reverse spray washing tower connected with the condensate recovery system, a second-stage reverse spray washing tower connected with the first-stage reverse spray washing tower, an adsorber connected with the second-stage reverse spray washing tower, a draft fan connected with the adsorber, and an exhaust cylinder connected with the draft fan. Air pressure measuring holes are arranged on the waste gas collection pipeline, front and rear main pipes of the fan and the exhaust cylinder.
2. A device for treating exhaust gases from the smelting of rare and precious metals as claimed in claim 1, characterized in that: The condensate recovery system comprises a water-cooled shell-and-tube condenser.
3. A device for treating exhaust gases from the smelting of rare and precious metals as claimed in claim 2, characterized in that: The first-stage reverse spray washing tower and the second-stage reverse spray washing tower each comprise a tower body, a cyclone plate arranged in the tower body, a spray layer, a filler layer and a demisting layer; the spray layer is three layers; a plurality of atomizing nozzles are arranged on each spray layer; the atomizing nozzles are connected with a washing liquid circulating pump; the washing liquid circulating pump is a vertical anti-idling chemical pump; the filler layer is provided with hollow spherical balls; and the demisting layer is provided with a demister.
4. A device for treating exhaust gases from the smelting of rare and precious metals as claimed in claim 3, characterized in that: The first-stage reverse spray washing tower and the second-stage reverse spray washing tower are respectively provided with an automatic liquid supplementing system, and the supplementing liquid comprises a washing agent and tap water.
5. A device for treating exhaust gases from the smelting of rare and precious metals as claimed in claim 4, characterized in that: The adsorber is an activated carbon adsorber.
6. A device for treating exhaust gases from the smelting of rare and precious metals as claimed in claim 5, characterized in that: