Environment-friendly metal smelting tail gas treatment system

Abstract

The utility model relates to the technical field of metal smelting, in particular to an environment-friendly metal smelting tail gas treatment system. An environment-friendly metal smelting tail gas treatment system comprises a smelting furnace, and the smelting furnace is sequentially communicated with a waste heat recovery device, a dust removal device, a cooling device, a desulfurization device, an adsorption device, a deep dust removal device and a high chimney. Heat energy in tail gas is recovered through the waste heat recovery device, so that the energy utilization efficiency is improved, and the energy consumption is reduced; the system is compact in structure, complete in function and suitable for metal smelting enterprises of various scales, and has high market popularization value.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal smelting technical field more specifically relates to a kind of environmental protection type metal smelting tail gas treatment system. BACKGROUND

[0002] Smelting tail gas contains a large amount of harmful substances, if not treated directly discharged, will cause serious pollution to atmospheric environment, affect air quality, even form acid rain and other environmental problems, by smelting tail gas treatment, can effectively remove these harmful substances, reduce the pollution degree of tail gas to environment.

[0003] At present, SO2, VOCs, dust is the main atmospheric pollutants, is the important pollution source of haze, with the continuous increase of total industrial pollution, the limitation of environmental bearing capacity, need to further improve emission standard, reduce pollutant emission concentration.

[0004] Therefore, provide a kind of environmental protection type metal smelting tail gas treatment system capable of increasing energy recycling rate in waste gas treatment, reduce the secondary pollution of adsorption material, it is the urgent problem of those skilled in the art. UTILITY MODEL CONTENT

[0005] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an environmental protection type metal smelting tail gas treatment system with high treatment efficiency, low cost, tail gas purification up to standard and beneficial to resource recycling and reuse.

[0006] To achieve the above object, the utility model provides the following technical scheme, mainly includes:

[0007] An environmental protection type metal smelting tail gas treatment system includes smelting furnace, the smelting furnace is sequentially connected with waste heat recovery device, dust removal device, cooling device, desulfurization device, adsorption device, deepening dust removal device and high chimney;

[0008] Waste heat recovery device recovers the heat energy in tail gas;

[0009] Dust removal device, dust removal device carries out preliminary treatment to tail gas, removes large particle matters and part of easily handled ingredients therein;

[0010] Cooling device, the tail gas after dust removal is cooled and handled, so that solid particles and harmful gases in tail gas are wetted and removed;

[0011] Desulfurization device, the tail gas after condensation is handled by desulfurization;

[0012] Adsorption device, the tail gas is handled by macromolecular adsorption;

[0013] Deepening dust removal device, remove some small particles in tail gas after the above treatment, and safely discharged into atmosphere by high chimney.

[0014] Preferably, a blower is installed between the smelting furnace and the waste heat recovery device, and a blower is installed between the deepening dust removal device and the high chimney.

[0015] Preferably, the waste heat recovery device adopts a heat exchanger to recover the heat energy in the tail gas.

[0016] Preferably, the dust removal device comprises a cyclone dust collector and a collection barrel, and the collection barrel is installed below the cyclone dust collector.

[0017] Preferably, the cooling device adopts a wet dust collector to wet and remove the solid particles and harmful gases in the tail gas by spraying water mist or chemical agents.

[0018] Preferably, the desulfurization device adopts a desulfurization tower to remove SO2 in the tail gas.

[0019] Preferably, the adsorption device adopts an activated carbon adsorber to adsorb VOCs in the tail gas.

[0020] Preferably, the deepening dust removal device comprises an electrostatic precipitator and a wet electrostatic precipitator, and the electrostatic precipitator and the wet electrostatic precipitator are sequentially connected, the electrostatic precipitator is connected with the activated carbon adsorber, and the wet electrostatic precipitator is connected with the high chimney.

[0021] Preferably, a ring-shaped sprayer is installed in the high chimney.

[0022] Compared with the prior art, the technical scheme can efficiently remove heat energy, particulate matter, harmful gases (such as SO2 and VOCs) and other pollutants in the tail gas, ensure that the tail gas meets the emission standard, significantly reduce the pollution to the atmosphere, pay attention to the recycling and utilization of energy, meet the concept of sustainable development, and has a relatively simple structure, a low cost, is easy to maintain and operate, is suitable for processing various types of metal smelting tail gas, has a wide application prospect and high economic efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme 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 the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0024] Figure 1 It is a structural schematic view of the present application.

[0025] Explanation of reference signs: 1 - smelting furnace, 2 - waste heat recovery device, 201 - heat exchanger, 3 - dust removal device, 301 - cyclone dust collector, 302 - collection bucket, 4 - cooling device, 401 - wet dust collector, 5 - desulfurization device, 501 - desulfurization tower, 6 - adsorption device, 601 - activated carbon adsorber, 7 - deep dust removal device, 701 - electrostatic precipitator, 702 - wet electrostatic precipitator, 8 - high chimney, 801 - annular sprayer, 9 - air blower. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Embodiment

[0028] An environmentally friendly metal smelting tail gas treatment system, as shown in Figure 1 , includes:

[0029] Waste heat recovery device 2

[0030] Energy recovery: The waste heat recovery device 2 recovers the heat energy in the tail gas through the heat exchanger 201, which can be used for other production links such as preheating raw materials, power generation, etc., thereby improving the energy utilization efficiency.

[0031] Reducing costs: The recovered heat energy reduces the enterprise's demand for external energy, thereby reducing energy consumption and operating costs.

[0032] Dust removal device 3

[0033] Simple structure: The cyclone dust collector 301 has a relatively simple structure, low cost, and is easy to maintain and operate.

[0034] Preliminary purification: The dust removal device 3 can remove large particles and some easily treated components in the tail gas, providing convenience for subsequent treatment.

[0035] Cooling device 4

[0036] Cooling and decontamination: The cooling device 4 sprays water mist or chemical agents through the wet dust collector 401, not only reducing the temperature of the tail gas, but also moistening and removing solid particles and harmful gases therein.

[0037] Enhancing the effect of subsequent treatment: The tail gas after cooling treatment is more conducive to the stable operation of subsequent desulfurization, adsorption and other treatment equipment, improving the overall treatment efficiency.

[0038] Desulfurization device 5

[0039] High-efficiency desulfurization: The desulfurization tower 501 adopts a high-efficiency desulfurization process, which can remove SO2 in the tail gas and reduce air pollution.

[0040] Product resourceization: The desulfurization products of some desulfurization processes (such as ammonia desulfurization) can be resourceized and utilized, such as producing ammonium sulfate and other fertilizers, increasing the economic benefits of enterprises.

[0041] Adsorption device 6

[0042] Removal of VOCs: The activated carbon adsorber 601 has strong adsorption capacity and can remove VOCs and other organic pollutants in the tail gas, improving the purification effect of the tail gas.

[0043] Wide application range: The activated carbon adsorption device 6 is suitable for treating various organic waste gas and has wide application prospects.

[0044] Deepening dust removal device 7

[0045] Fine dust removal: The combination of the electrostatic precipitator 701 and the wet electrostatic precipitator 702 can remove residual fine particulate matter in the tail gas, ensuring that the tail gas meets the emission standards.

[0046] Advanced technology: The electrostatic precipitation and wet electrostatic precipitation technologies are mature and efficient, and are important means in tail gas treatment.

[0047] High chimney 8

[0048] Optimized emission: The design of the high chimney 8 can ensure that the tail gas is fully diffused and diluted during the emission process, reducing pollution to the surrounding environment.

[0049] Safe emission: The annular sprayer 801 that may be installed inside the high chimney 8 can further optimize the emission effect of the tail gas, ensuring that the tail gas is safely and harmlessly discharged into the atmosphere. In order to further optimize the above scheme, the first resin tower 3 and the second resin tower 4 connected in series are stainless steel adsorption towers.

[0050] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0051] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environmentally friendly metal smelting off-gas treatment system, characterized by, The application relates to a smelting furnace (1) which is sequentially connected with a waste heat recovery device (2), a dust removal device (3), a cooling device (4), a desulfurization device (5), an adsorption device (6), a deep dust removal device (7) and a high chimney (8). The waste heat recovery device (2) recovers heat energy in tail gas. The dust removal device (3) preliminarily processes the tail gas to remove large particles and part of easily treated components. The cooling device (4) cools the tail gas after dust removal so that solid particles and harmful gas in the tail gas are wetted and removed. The desulfurization device (5) desulfurizes the condensed tail gas. The adsorption device (6) adsorbs macromolecules in the tail gas. The deep dust removal device (7) removes some small particles in the tail gas after the above treatment and safely discharges the tail gas into the atmosphere through the high chimney (8).

2. The environmentally friendly metal smelting tail gas treatment system according to claim 1, characterized in that, A blower (9) is arranged between the smelting furnace (1) and the waste heat recovery device (2), and a blower (9) is arranged between the deep dust removal device (7) and the high chimney (8).

3. The environmentally friendly metal smelting tail gas treatment system according to claim 1, characterized in that, The waste heat recovery device (2) adopts a heat exchanger (201) to recover heat energy in the tail gas.

4. The environmentally friendly metal smelting tail gas treatment system according to claim 1, characterized in that, The dust removal device (3) comprises a cyclone dust collector (301) and a collecting barrel (302), and the collecting barrel (302) is arranged below the cyclone dust collector (301).

5. The environmentally friendly metal smelting off-gas treatment system according to claim 1, characterized in that, The cooling device (4) adopts a wet dust collector (401) to wet and remove solid particles and harmful gas in the tail gas by spraying water mist or chemical agents.

6. The environmentally friendly metal smelting off-gas treatment system according to claim 1, characterized in that, The desulfurization device (5) adopts a desulfurization tower (501) to remove SO2 in the tail gas.

7. The environmentally friendly metal smelting off-gas treatment system according to claim 1, characterized in that, The adsorption device (6) adopts an activated carbon adsorber (601) to adsorb VOCs in the tail gas.

8. The environmentally friendly metal smelting tail gas treatment system according to claim 1, characterized in that: The deep dust removal device (7) comprises an electrostatic dust collector (701) and a wet electrostatic dust collector (702), the electrostatic dust collector (701) and the wet electrostatic dust collector (702) are sequentially connected, the electrostatic dust collector (701) is connected with the activated carbon adsorber (601), and the wet electrostatic dust collector (702) is connected with the high chimney (8).

9. The environmentally friendly metal smelting off-gas treatment system according to claim 1, characterized in that, The high chimney (8) is internally provided with a ring-shaped sprayer (801).

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