CN105645364A - Device and method using hydrogen peroxide, activated carbon and smelting exhaust gas to produce acid - Google Patents
Device and method using hydrogen peroxide, activated carbon and smelting exhaust gas to produce acid Download PDFInfo
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- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 title claims abstract description 133
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 238000003723 Smelting Methods 0.000 title claims abstract description 69
- 239000002253 acid Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 title claims abstract description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 157
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000003546 flue gas Substances 0.000 claims abstract description 81
- 239000007921 spray Substances 0.000 claims abstract description 71
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 39
- 230000023556 desulfurization Effects 0.000 claims abstract description 39
- 230000008021 deposition Effects 0.000 claims abstract description 28
- 230000008929 regeneration Effects 0.000 claims abstract description 23
- 238000011069 regeneration method Methods 0.000 claims abstract description 23
- 238000003860 storage Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 67
- 239000000243 solution Substances 0.000 claims description 18
- 239000003929 acidic solution Substances 0.000 claims description 10
- 239000002356 single layer Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 20
- 230000003197 catalytic effect Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
- C01B17/80—Apparatus
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
本发明涉及一种利用过氧化氢与活性炭对冶炼烟气制酸的装置和方法，属于化工技术领域。该装置脱硫塔体下部一侧设有冶炼烟气入口，脱硫塔体内部设有若干层过氧化氢溶液喷淋层，最顶端的过氧化氢溶液喷淋层上设有充填有活性炭的固定床，充填有活性炭的固定床上设有稀硫酸喷淋层，充填有活性炭的固定床和稀硫酸喷淋层为一组，脱硫塔体顶部设有尾气出口，过氧化氢溶液喷淋层依次通过泵和阀门顺次连接双氧水储存槽、双氧水调配槽，稀硫酸喷淋层通过泵和阀门连接脱硫塔体中的酸性溶液沉积池上部，酸性溶液沉积池底部通过泵和阀门顺次连接再生池和成品酸槽。该装置能将冶炼系统的烟气中脱硫后生成硫酸。该装置和方法实现了冶炼烟气中二氧化硫资源化利用。
The invention relates to a device and method for producing acid from smelting flue gas by using hydrogen peroxide and activated carbon, belonging to the technical field of chemical industry. There is a smelting flue gas inlet on the lower side of the desulfurization tower body of the device. There are several hydrogen peroxide solution spray layers inside the desulfurization tower body, and a fixed bed filled with activated carbon is installed on the top hydrogen peroxide solution spray layer. , the fixed bed filled with activated carbon is provided with a dilute sulfuric acid spray layer, the fixed bed filled with activated carbon and the dilute sulfuric acid spray layer form a group, the top of the desulfurization tower is provided with an exhaust gas outlet, and the hydrogen peroxide solution spray layer passes through the pump in turn The hydrogen peroxide storage tank and the hydrogen peroxide blending tank are connected in sequence with the valve, the dilute sulfuric acid spray layer is connected to the upper part of the acid solution deposition tank in the desulfurization tower body through the pump and the valve, and the bottom of the acid solution deposition tank is connected to the regeneration tank and the finished product in sequence through the pump and the valve acid tank. The device can desulfurize the flue gas of the smelting system and generate sulfuric acid. The device and method realize resource utilization of sulfur dioxide in smelting flue gas.
Description
技术领域technical field
本发明涉及一种利用过氧化氢与活性炭对冶炼烟气制酸的装置和方法，属于化工技术领域。The invention relates to a device and method for producing acid from smelting flue gas by using hydrogen peroxide and activated carbon, belonging to the technical field of chemical industry.
背景技术Background technique
硫酸是重要的化学用品，广泛应用于肥料、药物、化学品、洗涤剂、水处理等产品生产。截至2014年底，中国硫酸产能达到123Mt/a。目前，硫酸生产主要有3种原料：硫磺制酸、硫铁矿制酸和冶炼烟气制酸，分别占硫酸总产量的45％、25％和30％。Sulfuric acid is an important chemical product, widely used in the production of fertilizers, medicines, chemicals, detergents, water treatment and other products. By the end of 2014, China's sulfuric acid production capacity reached 123Mt/a. At present, there are three main raw materials for sulfuric acid production: sulfuric acid, pyrite ore and smelting flue gas, which account for 45%, 25% and 30% of the total sulfuric acid production respectively.
有色金属冶炼烟气中含有大量的二氧化硫，直接排放会对大气造成严重污染，造成自然生态毁灭性的失衡，也是对硫资源的浪费。随着经济的飞速发展，对有色金属的需求猛增，按照绿色环保的宗旨，对有色金属冶炼烟气的治理就显得尤为重要，其中冶炼烟气制酸是对冶炼烟气中二氧化硫回收利用的主要手段。利用冶炼烟气制酸不仅能够有效的减少污染性气体的排放使其资源化利用，而且在制酸领域产生良好的经济效益。Non-ferrous metal smelting flue gas contains a large amount of sulfur dioxide, direct emission will cause serious pollution to the atmosphere, causing a devastating imbalance in the natural ecology, and it is also a waste of sulfur resources. With the rapid development of the economy, the demand for non-ferrous metals has soared. According to the purpose of green environmental protection, the treatment of non-ferrous metal smelting flue gas is particularly important. Among them, the acid production of smelting flue gas is the recovery and utilization of sulfur dioxide in the smelting flue gas. primary means. The use of smelting flue gas to make acid can not only effectively reduce the emission of polluting gas and make it a resource, but also produce good economic benefits in the field of acid making.
针对不同浓度SO2有色冶炼烟气，处理方法不尽相同。对于SO2浓度在3.5%以上的烟气采用一转一吸法制酸；对于SO2浓度在7%~12%的冶炼烟气，主要采用传统的接触法制酸，比如两转两吸技术，从烟气中回收SO2生成H2SO4;对于SO2在20%以上的富氧冶炼烟气采用三转三吸技术；传统接触法制酸工艺复杂，且成本较高。冶炼烟气的不稳定性也使得冶炼烟气制酸受到一定的限制。For different concentrations of SO 2 non-ferrous smelting flue gas, the treatment methods are different. For the flue gas whose SO2 concentration is above 3.5%, use the one - turn-one-suction method to make acid; for the smelting flue gas with SO2 concentration of 7 %~12%, mainly use the traditional contact method to make acid, such as the two-turn two-suction technology, from Recover SO 2 from the flue gas to generate H 2 SO 4 ; for the oxygen-enriched smelting flue gas with SO 2 above 20%, the three-stage conversion and three-suction technology is adopted; the traditional contact method for acid production is complicated and expensive. The instability of smelting flue gas also limits the production of acid from smelting flue gas.
发明内容Contents of the invention
针对上述现有技术存在的问题及不足，本发明提供一种利用过氧化氢与活性炭对冶炼烟气制酸的装置和方法。该装置和方法实现了冶炼烟气中二氧化硫的资源化利用，本发明技术方案通过以下实现。Aiming at the above-mentioned problems and deficiencies in the prior art, the present invention provides a device and method for making acid from smelting flue gas by using hydrogen peroxide and activated carbon. The device and method realize resource utilization of sulfur dioxide in smelting flue gas, and the technical solution of the present invention is realized through the following.
一种利用过氧化氢与活性炭对冶炼烟气制酸的装置，包括脱硫塔体、冶炼烟气入口1、充填有活性炭的固定床2、稀硫酸喷淋层3、尾气出口4、过氧化氢溶液喷淋层5、双氧水储存槽6、双氧水调配槽7、再生池、成品酸槽12、泵13和阀门14，所述脱硫塔体下部一侧设有冶炼烟气入口1，冶炼烟气入口1上方脱硫塔体内部设有若干层过氧化氢溶液喷淋层5，最顶端的过氧化氢溶液喷淋层5上设有充填有活性炭的固定床2，充填有活性炭的固定床2上设有稀硫酸喷淋层3，充填有活性炭的固定床2和稀硫酸喷淋层3为一组，具体的组数根据情况而定，脱硫塔体顶部设有尾气出口4，过氧化氢溶液喷淋层5依次通过泵13和阀门14顺次连接双氧水储存槽6、双氧水调配槽7，稀硫酸喷淋层3通过泵13和阀门14连接脱硫塔体中的酸性溶液沉积池上部，酸性溶液沉积池底部通过泵13和阀门14顺次连接再生池和成品酸槽12。A device for making acid from smelting flue gas by using hydrogen peroxide and activated carbon, comprising a desulfurization tower body, smelting flue gas inlet 1, fixed bed filled with activated carbon 2, dilute sulfuric acid spray layer 3, tail gas outlet 4, hydrogen peroxide Solution spray layer 5, hydrogen peroxide storage tank 6, hydrogen peroxide blending tank 7, regeneration tank, finished acid tank 12, pump 13 and valve 14, the lower side of the desulfurization tower is provided with a smelting flue gas inlet 1 and a smelting flue gas inlet 1 There are several layers of hydrogen peroxide solution spray layers 5 inside the upper desulfurization tower body, the topmost hydrogen peroxide solution spray layer 5 is provided with a fixed bed 2 filled with activated carbon, and a fixed bed 2 filled with activated carbon is provided with There is a dilute sulfuric acid spray layer 3, a fixed bed 2 filled with activated carbon and a dilute sulfuric acid spray layer 3 form a group. The spray layer 5 is sequentially connected to the hydrogen peroxide storage tank 6 and the hydrogen peroxide preparation tank 7 through the pump 13 and the valve 14, and the dilute sulfuric acid spray layer 3 is connected to the upper part of the acid solution deposition tank in the desulfurization tower body through the pump 13 and the valve 14, and the acid solution is deposited The bottom of the pool is connected to the regeneration pool and the finished acid tank 12 in sequence through a pump 13 and a valve 14 .
所述充填有活性炭的固定床2采用双床层。The fixed bed 2 filled with activated carbon adopts double bed layers.
一种利用过氧化氢与活性炭对冶炼烟气制酸的装置应用方法，其具体步骤如下：A device application method for making acid from smelting flue gas by using hydrogen peroxide and activated carbon, the specific steps are as follows:
（1）首先将冶炼系统的烟气经除尘净化换热降温至温度为85℃以下，然后从冶炼烟气入口1进入到脱硫塔体中，过氧化氢溶液喷淋层5中喷淋的过氧化氢溶液为市售过氧化氢溶液稀释所得，其浓度为27.5wt%以下，单层过氧化氢溶液喷淋层的喷淋量依其浓度及烟气流量和浓度而调整，从而烟气中的二氧化硫氧化生成硫酸，硫酸沉积到酸性溶液沉积池中；(1) First, the flue gas from the smelting system is cooled to a temperature below 85°C through dust removal, purification, and heat exchange, and then enters the desulfurization tower body from the smelting flue gas inlet 1, and the hydrogen peroxide solution spray layer 5 sprays the overgas. The hydrogen peroxide solution is obtained by diluting the commercially available hydrogen peroxide solution, and its concentration is below 27.5wt%. The sulfur dioxide is oxidized to generate sulfuric acid, and the sulfuric acid is deposited into the acidic solution deposition tank;
（2）经步骤（1）处理而未被过氧化氢溶液的烟气上升至充填有活性炭的固定床2中被活性炭吸附，经催化氧化反应生成三氧化硫，三氧化硫与稀硫酸喷淋层3中喷出的含有过氧化氢、浓度为52.2wt%以下的稀硫酸混合生成硫酸沉积到酸性溶液沉积池中，单层稀硫酸喷淋层（3）喷淋量根据实际生产而调整；(2) After being treated in step (1), the flue gas that has not been treated by the hydrogen peroxide solution rises to the fixed bed 2 filled with activated carbon to be adsorbed by activated carbon, and sulfur trioxide is generated by catalytic oxidation reaction, and sulfur trioxide is sprayed with dilute sulfuric acid The dilute sulfuric acid sprayed from layer 3 containing hydrogen peroxide and having a concentration of 52.2wt% or less is mixed to generate sulfuric acid and deposited in the acidic solution deposition tank, and the spraying amount of the single-layer dilute sulfuric acid spray layer (3) is adjusted according to actual production;
（3）将步骤（1）和（2）得到的沉积到酸性溶液沉积池中硫酸通过泵13和阀门14进入到再生池中，最后存储到成品酸槽12。(3) Deposit the obtained in steps (1) and (2) into the acid solution deposition tank. The sulfuric acid enters the regeneration tank through the pump 13 and the valve 14, and finally stores it in the finished acid tank 12.
所述步骤（1）中冶炼系统的烟气中二氧化硫含量为50000mg/m3～800000mg/m3，控制冶炼系统的烟气的流量为50000～200000m3/h。The sulfur dioxide content in the flue gas of the smelting system in the step (1) is 50,000-800,000 mg/m 3 , and the flow rate of the flue gas in the smelting system is controlled to be 50,000-200,000 m3 /h.
本发明的反应原理如下：The reaction principle of the present invention is as follows:
①过氧化氢溶液喷淋吸收段内发生反应：①Reaction occurs in the hydrogen peroxide solution spray absorption section:
H2O2+SO2→H2SO4 H 2 O 2 +SO 2 →H 2 SO 4
过氧化氢溶液中的H2O2与烟气中的SO2反应生成H2SO4，从而达到二氧化硫的处理。The H 2 O 2 in the hydrogen peroxide solution reacts with the SO 2 in the flue gas to generate H 2 SO 4 , so as to achieve the treatment of sulfur dioxide.
②充填有活性炭的固定床层内的反应：②Reaction in the fixed bed filled with activated carbon:
SO2(g)→SO2*SO 2 (g)→SO 2 *
O2(g)→O2*O 2 (g)→O 2 *
H2O(g)→H2O*H 2 O(g)→H 2 O*
SO2*+O2*→SO3*SO2* + O2 * → SO3*
SO3*+H2O*→H2SO4*SO3* + H2O * → H2SO4 *
式中含*的代表吸附态。The ones with * in the formula represent the adsorption state.
当冶炼系统的烟气中SO2通过物理吸附到达活性炭表面上时，由于活性炭表面具有催化作用，会把SO2氧化成SO3，而当遇到稀硫酸中的水时就会变成H2SO4，从而利于这个吸附反应连续的除去SO2。催化反应生成的硫酸富集在活性炭的炭基孔隙中，当脱硫一段时间后孔隙中的硫酸达到饱和后用再生液冲洗出硫酸，活性炭再生脱硫能力得到恢复。When SO 2 in the flue gas of the smelting system reaches the surface of activated carbon through physical adsorption, due to the catalytic effect on the surface of activated carbon, SO 2 will be oxidized into SO 3 , and when it encounters water in dilute sulfuric acid, it will become H 2 SO 4 , thereby facilitating the continuous removal of SO 2 by this adsorption reaction. The sulfuric acid generated by the catalytic reaction is enriched in the carbon-based pores of the activated carbon. When the sulfuric acid in the pores reaches saturation after desulfurization for a period of time, the sulfuric acid is washed out with the regeneration solution, and the regeneration and desulfurization ability of the activated carbon is restored.
本发明的有益效果是：本发明能够有效利用冶炼烟气中的SO2制取H2SO4；本发明可以根据调节过氧化氢溶液的浓度以及喷淋层数来处理不同浓度的二氧化硫烟气，适应范围广；活性炭可再生，吸收液循环利用；无二次污染符合环保发展趋势。The beneficial effects of the present invention are: the present invention can effectively utilize SO 2 in the smelting flue gas to produce H 2 SO 4 ; the present invention can treat sulfur dioxide flue gas with different concentrations according to the concentration of the hydrogen peroxide solution and the number of spraying layers , a wide range of applications; the activated carbon can be regenerated, and the absorption liquid can be recycled; no secondary pollution is in line with the development trend of environmental protection.
附图说明Description of drawings
图1是本发明工艺流程图。Fig. 1 is a process flow diagram of the present invention.
图中：1-冶炼烟气入口，2-充填有活性炭的固定床，3-稀硫酸喷淋层，4-尾气出口，5-过氧化氢溶液喷淋层，6-双氧水储存槽，7-双氧水调配槽，8-稀酸循环泵，9-再生池Ⅰ，10-再生池Ⅱ，11-成品酸泵，12-成品酸槽，13-泵，14-阀门。In the figure: 1-smelting flue gas inlet, 2-fixed bed filled with activated carbon, 3-dilute sulfuric acid spray layer, 4-tail gas outlet, 5-hydrogen peroxide solution spray layer, 6-hydrogen peroxide storage tank, 7- Hydrogen peroxide blending tank, 8- dilute acid circulation pump, 9- regeneration tank Ⅰ, 10- regeneration tank Ⅱ, 11- finished acid pump, 12- finished acid tank, 13- pump, 14- valve.
具体实施方式detailed description
下面结合附图和具体实施方式，对本发明作进一步说明。The present invention will be further described below in combination with the accompanying drawings and specific embodiments.
实施例1Example 1
如图1所示，该利用过氧化氢与活性炭对冶炼烟气制酸的装置，包括脱硫塔体、冶炼烟气入口1、充填有活性炭的固定床2、稀硫酸喷淋层3、尾气出口4、过氧化氢溶液喷淋层5、双氧水储存槽6、双氧水调配槽7、再生池、成品酸槽12、泵13（包括稀酸循环泵8、成品酸泵11以及其它泵）和阀门14，所述脱硫塔体下部一侧设有冶炼烟气入口1，冶炼烟气入口1上方脱硫塔体内部设有若干层过氧化氢溶液喷淋层5，最顶端的过氧化氢溶液喷淋层5上设有充填有活性炭的固定床2，充填有活性炭的固定床2上设有稀硫酸喷淋层3，充填有活性炭的固定床2和稀硫酸喷淋层3为一组，本装置中设有两组，脱硫塔体顶部设有尾气出口4，过氧化氢溶液喷淋层5依次通过泵13和阀门14顺次连接双氧水储存槽6、双氧水调配槽7，稀硫酸喷淋层3通过泵13（稀酸循环泵8）和阀门14连接脱硫塔体中的酸性溶液沉积池上部，酸性溶液沉积池底部通过泵13（成品酸泵11）和阀门14顺次连接再生池和成品酸槽12。其中充填有活性炭的固定床2采用双床层。As shown in Figure 1, the device for making acid from smelting flue gas by using hydrogen peroxide and activated carbon includes a desulfurization tower body, smelting flue gas inlet 1, fixed bed 2 filled with activated carbon, dilute sulfuric acid spray layer 3, and tail gas outlet 4. Hydrogen peroxide solution spray layer 5, hydrogen peroxide storage tank 6, hydrogen peroxide blending tank 7, regeneration tank, finished acid tank 12, pump 13 (including dilute acid circulation pump 8, finished acid pump 11 and other pumps) and valve 14 , the lower side of the desulfurization tower body is provided with a smelting flue gas inlet 1, and several layers of hydrogen peroxide solution spray layers 5 are arranged inside the desulfurization tower body above the smelting flue gas inlet 1, and the hydrogen peroxide solution spray layer 5 at the top is 5 is provided with a fixed bed 2 filled with activated carbon, and a dilute sulfuric acid spray layer 3 is arranged on the fixed bed 2 filled with activated carbon. The fixed bed 2 filled with activated carbon and the dilute sulfuric acid spray layer 3 form a group. In this device There are two groups, the top of the desulfurization tower is provided with a tail gas outlet 4, the hydrogen peroxide solution spray layer 5 is sequentially connected to the hydrogen peroxide storage tank 6 and the hydrogen peroxide preparation tank 7 through the pump 13 and the valve 14, and the dilute sulfuric acid spray layer 3 passes through Pump 13 (dilute acid circulation pump 8) and valve 14 are connected to the upper part of the acid solution deposition tank in the desulfurization tower, and the bottom of the acid solution deposition tank is connected to the regeneration tank and the finished acid tank in sequence through the pump 13 (finished acid pump 11) and valve 14 12. Wherein the fixed bed 2 filled with activated carbon adopts a double bed layer.
该利用过氧化氢与活性炭对冶炼烟气制酸的装置应用方法，其具体步骤如下：The device application method of using hydrogen peroxide and activated carbon to produce acid from smelting flue gas has the following specific steps:
（1）首先将冶炼系统的烟气经除尘净化换热降温至温度为85℃以下，然后从冶炼烟气入口1进入到脱硫塔体中，过氧化氢溶液喷淋层5中喷淋出浓度为3wt%的过氧化氢溶液，控制单层过氧化氢溶液喷淋层的喷淋量为120m3/h，从而烟气中的二氧化硫氧化生成硫酸，硫酸沉积到酸性溶液沉积池中；其中冶炼系统的烟气中二氧化硫含量为200000mg/m3，控制冶炼系统的烟气的流量为100000m3/h；经过此段二氧化硫处理量达到99.6%；(1) First, the flue gas from the smelting system is cooled to a temperature below 85°C through dust removal, purification, and heat exchange, and then enters the desulfurization tower body from the smelting flue gas inlet 1, and the hydrogen peroxide solution spray layer 5 sprays out the concentration The hydrogen peroxide solution is 3wt%, and the spray volume of the single-layer hydrogen peroxide solution spray layer is controlled to be 120m3/h, so that the sulfur dioxide in the flue gas is oxidized to generate sulfuric acid, and the sulfuric acid is deposited in the acid solution deposition pool; the smelting system The content of sulfur dioxide in the flue gas is 200000mg/m 3 , and the flow rate of flue gas in the control smelting system is 100000m 3 /h; after this section, the sulfur dioxide treatment capacity reaches 99.6%;
（2）经步骤（1）处理而未被过氧化氢溶液的烟气上升至充填有活性炭的固定床2中被活性炭吸附，经催化氧化反应生成三氧化硫，三氧化硫与稀硫酸喷淋层3中喷出的含有过氧化氢、浓度为8.1wt%的稀硫酸（含有过氧化氢稀硫酸从酸性溶液沉积池上部通过稀酸循环泵8连通稀硫酸喷淋层3）混合生成硫酸沉积到酸性溶液沉积池中，其中控制单层稀硫酸喷淋层3喷淋量为30m3/h；使得该部分的脱硫率达到80%，脱硫后尾气中SO2浓度为160mg/m3，低于国家标准400mg/m3；(2) After being treated in step (1), the flue gas that has not been treated by the hydrogen peroxide solution rises to the fixed bed 2 filled with activated carbon to be adsorbed by activated carbon, and sulfur trioxide is generated by catalytic oxidation reaction, and sulfur trioxide is sprayed with dilute sulfuric acid Dilute sulfuric acid containing hydrogen peroxide and a concentration of 8.1wt% sprayed from layer 3 (dilute sulfuric acid containing hydrogen peroxide is connected to dilute sulfuric acid spray layer 3 through dilute acid circulation pump 8 from the upper part of the acid solution deposition tank) to form sulfuric acid deposition In the acidic solution deposition pool, the spray volume of the single-layer dilute sulfuric acid spray layer 3 is controlled to be 30m3/h; the desulfurization rate of this part can reach 80%, and the concentration of SO 2 in the tail gas after desulfurization is 160mg/m 3 , lower than National standard 400mg/m 3 ;
（3）将步骤（1）和（2）得到的沉积到酸性溶液沉积池中硫酸通过泵13和阀门14进入到再生池（再生池的作用是循环利用生成的硫酸，提高硫酸浓度）中，最后存储到成品酸槽12。(3) Deposit the sulfuric acid obtained in steps (1) and (2) into the acidic solution deposition pool and enter the regeneration pool through the pump 13 and valve 14 (the function of the regeneration pool is to recycle the generated sulfuric acid to increase the concentration of sulfuric acid), Finally stored in finished product acid tank 12.
实施例2Example 2
该利用过氧化氢与活性炭对冶炼烟气制酸的装置，包括脱硫塔体、冶炼烟气入口1、充填有活性炭的固定床2、稀硫酸喷淋层3、尾气出口4、过氧化氢溶液喷淋层5、双氧水储存槽6、双氧水调配槽7、再生池、成品酸槽12、泵13和阀门14，所述脱硫塔体下部一侧设有冶炼烟气入口1，冶炼烟气入口1上方脱硫塔体内部设有若干层过氧化氢溶液喷淋层5，最顶端的过氧化氢溶液喷淋层5上设有充填有活性炭的固定床2，充填有活性炭的固定床2上设有稀硫酸喷淋层3，充填有活性炭的固定床2和稀硫酸喷淋层3为一组，具体的组数根据情况而定，脱硫塔体顶部设有尾气出口4，过氧化氢溶液喷淋层5依次通过泵13和阀门14顺次连接双氧水储存槽6、双氧水调配槽7，稀硫酸喷淋层3通过泵13和阀门14连接脱硫塔体中的酸性溶液沉积池上部，酸性溶液沉积池底部通过泵13和阀门14顺次连接再生池和成品酸槽12。The device for making acid from smelting flue gas by using hydrogen peroxide and activated carbon includes a desulfurization tower body, smelting flue gas inlet 1, fixed bed 2 filled with activated carbon, dilute sulfuric acid spray layer 3, tail gas outlet 4, and hydrogen peroxide solution Spray layer 5, hydrogen peroxide storage tank 6, hydrogen peroxide blending tank 7, regeneration tank, finished acid tank 12, pump 13 and valve 14, the lower side of the desulfurization tower is provided with smelting flue gas inlet 1, smelting flue gas inlet 1 There are several hydrogen peroxide solution spray layers 5 inside the upper desulfurization tower body, the topmost hydrogen peroxide solution spray layer 5 is provided with a fixed bed 2 filled with activated carbon, and a fixed bed 2 filled with activated carbon is provided with The dilute sulfuric acid spray layer 3, the fixed bed 2 filled with activated carbon and the dilute sulfuric acid spray layer 3 form a group. Layer 5 is sequentially connected to hydrogen peroxide storage tank 6 and hydrogen peroxide preparation tank 7 through pump 13 and valve 14, and dilute sulfuric acid spray layer 3 is connected to the upper part of the acid solution deposition tank in the desulfurization tower body through pump 13 and valve 14, and the acid solution deposition tank The bottom is connected to the regeneration tank and the finished acid tank 12 in sequence through a pump 13 and a valve 14 .
该利用过氧化氢与活性炭对冶炼烟气制酸的装置应用方法，其具体步骤如下：The device application method of using hydrogen peroxide and activated carbon to produce acid from smelting flue gas has the following specific steps:
（1）首先将冶炼系统的烟气经除尘净化换热降温至温度为85℃以下，然后从冶炼烟气入口1进入到脱硫塔体中，过氧化氢溶液喷淋层5中喷淋出浓度为7wt%的过氧化氢溶液，控制单层过氧化氢溶液喷淋层的喷淋量为200m3/h，从而烟气中的二氧化硫氧化生成硫酸，硫酸沉积到酸性溶液沉积池中；其中冶炼系统的烟气中二氧化硫含量为800000mg/m3，控制冶炼系统的烟气的流量为200000m3/h；经过此段二氧化硫处理量达到99.7%；(1) First, the flue gas from the smelting system is cooled to a temperature below 85°C through dust removal, purification, and heat exchange, and then enters the desulfurization tower body from the smelting flue gas inlet 1, and the hydrogen peroxide solution spray layer 5 sprays out the concentration The hydrogen peroxide solution is 7wt%, and the spray volume of the single-layer hydrogen peroxide solution spray layer is controlled to 200m3/h, so that the sulfur dioxide in the flue gas is oxidized to generate sulfuric acid, and the sulfuric acid is deposited in the acid solution deposition pool; the smelting system The sulfur dioxide content in the flue gas is 800,000mg/m 3 , and the flue gas flow rate of the control smelting system is 200,000m3/h; after this section, the sulfur dioxide treatment capacity reaches 99.7%;
（2）经步骤（1）处理而未被过氧化氢溶液的烟气上升至充填有活性炭的固定床2中被活性炭吸附，经催化氧化反应生成三氧化硫，三氧化硫与稀硫酸喷淋层3中喷出的含有过氧化氢、浓度为17.7wt%的稀硫酸混合生成硫酸沉积到酸性溶液沉积池中，其中控制单层稀硫酸喷淋层3喷淋量为35m3/h；使得该部分的脱硫率达到90%，脱硫后尾气中SO2浓度为320mg/m3，低于国家标准400mg/m3；(2) After being treated in step (1), the flue gas that has not been treated by the hydrogen peroxide solution rises to the fixed bed 2 filled with activated carbon to be adsorbed by activated carbon, and sulfur trioxide is generated by catalytic oxidation reaction, and sulfur trioxide is sprayed with dilute sulfuric acid The dilute sulfuric acid that contains hydrogen peroxide sprayed out in the layer 3, and concentration is 17.7wt% mixes and generates sulfuric acid and deposits in the acidic solution deposition tank, wherein the spray volume of controlling single-layer dilute sulfuric acid spray layer 3 is 35m3/h; Part of the desulfurization rate reaches 90%, and the concentration of SO 2 in the tail gas after desulfurization is 320mg/m 3 , which is lower than the national standard of 400mg/m 3 ;
（3）将步骤（1）和（2）得到的沉积到酸性溶液沉积池中硫酸通过泵13和阀门14进入到再生池（再生池的作用是循环利用生成的硫酸，提高硫酸浓度）中，最后存储到成品酸槽12。(3) Deposit the sulfuric acid obtained in steps (1) and (2) into the acidic solution deposition pool and enter the regeneration pool through the pump 13 and valve 14 (the function of the regeneration pool is to recycle the generated sulfuric acid to increase the concentration of sulfuric acid), Finally stored in finished product acid tank 12.
实施例3Example 3
该利用过氧化氢与活性炭对冶炼烟气制酸的装置，包括脱硫塔体、冶炼烟气入口1、充填有活性炭的固定床2、稀硫酸喷淋层3、尾气出口4、过氧化氢溶液喷淋层5、双氧水储存槽6、双氧水调配槽7、再生池、成品酸槽12、泵13和阀门14，所述脱硫塔体下部一侧设有冶炼烟气入口1，冶炼烟气入口1上方脱硫塔体内部设有若干层过氧化氢溶液喷淋层5，最顶端的过氧化氢溶液喷淋层5上设有充填有活性炭的固定床2，充填有活性炭的固定床2上设有稀硫酸喷淋层3，充填有活性炭的固定床2和稀硫酸喷淋层3为一组，具体的组数根据情况而定，脱硫塔体顶部设有尾气出口4，过氧化氢溶液喷淋层5依次通过泵13和阀门14顺次连接双氧水储存槽6、双氧水调配槽7，稀硫酸喷淋层3通过泵13和阀门14连接脱硫塔体中的酸性溶液沉积池上部，酸性溶液沉积池底部通过泵13和阀门14顺次连接再生池和成品酸槽12。The device for making acid from smelting flue gas by using hydrogen peroxide and activated carbon includes a desulfurization tower body, smelting flue gas inlet 1, fixed bed 2 filled with activated carbon, dilute sulfuric acid spray layer 3, tail gas outlet 4, and hydrogen peroxide solution Spray layer 5, hydrogen peroxide storage tank 6, hydrogen peroxide blending tank 7, regeneration tank, finished acid tank 12, pump 13 and valve 14, the lower side of the desulfurization tower is provided with smelting flue gas inlet 1, smelting flue gas inlet 1 There are several hydrogen peroxide solution spray layers 5 inside the upper desulfurization tower body, the topmost hydrogen peroxide solution spray layer 5 is provided with a fixed bed 2 filled with activated carbon, and a fixed bed 2 filled with activated carbon is provided with The dilute sulfuric acid spray layer 3, the fixed bed 2 filled with activated carbon and the dilute sulfuric acid spray layer 3 form a group. Layer 5 is sequentially connected to hydrogen peroxide storage tank 6 and hydrogen peroxide preparation tank 7 through pump 13 and valve 14, and dilute sulfuric acid spray layer 3 is connected to the upper part of the acid solution deposition tank in the desulfurization tower body through pump 13 and valve 14, and the acid solution deposition tank The bottom is connected to the regeneration tank and the finished acid tank 12 in sequence through a pump 13 and a valve 14 .
该利用过氧化氢与活性炭对冶炼烟气制酸的装置应用方法，其具体步骤如下：The device application method of using hydrogen peroxide and activated carbon to produce acid from smelting flue gas has the following specific steps:
（1）首先将冶炼系统的烟气经除尘净化换热降温至温度为85℃以下，然后从冶炼烟气入口1进入到脱硫塔体中，过氧化氢溶液喷淋层5中喷淋出浓度为27.5wt%的过氧化氢溶液，控制单层过氧化氢溶液喷淋层的喷淋量为100m3/h，从而烟气中的二氧化硫氧化生成硫酸，硫酸沉积到酸性溶液沉积池中；其中冶炼系统的烟气中二氧化硫含量为50000mg/m3，控制冶炼系统的烟气的流量为50000m3/h；经过此段二氧化硫处理量达到99.7%；(1) First, the flue gas from the smelting system is cooled to a temperature below 85°C through dust removal, purification, and heat exchange, and then enters the desulfurization tower body from the smelting flue gas inlet 1, and the hydrogen peroxide solution spray layer 5 sprays out the concentration It is 27.5wt% hydrogen peroxide solution, and the spray rate of the single-layer hydrogen peroxide solution spray layer is controlled to be 100m3/h, so that the sulfur dioxide in the flue gas is oxidized to generate sulfuric acid, and the sulfuric acid is deposited in the acid solution deposition pool; wherein the smelting The sulfur dioxide content in the flue gas of the system is 50000mg/m 3 , and the flue gas flow rate of the control smelting system is 50000m3/h; the sulfur dioxide treatment capacity reaches 99.7% after this section;
（2）经步骤（1）处理而未被过氧化氢溶液的烟气上升至充填有活性炭的固定床2中被活性炭吸附，经催化氧化反应生成三氧化硫，三氧化硫与稀硫酸喷淋层3中喷出的含有过氧化氢、浓度为52.2wt%的稀硫酸混合生成硫酸沉积到酸性溶液沉积池中，其中控制单层稀硫酸喷淋层3喷淋量为20m3/h；使得该部分的脱硫率达到70%，脱硫后尾气中SO2浓度为120mg/m3，低于国家标准400mg/m3；(2) After being treated in step (1), the flue gas that has not been treated by the hydrogen peroxide solution rises to the fixed bed 2 filled with activated carbon to be adsorbed by activated carbon, and sulfur trioxide is generated by catalytic oxidation reaction, and sulfur trioxide is sprayed with dilute sulfuric acid Containing hydrogen peroxide sprayed in the layer 3, concentration is that the dilute sulfuric acid of 52.2wt% mixes and generates sulfuric acid and deposits in the acidic solution deposition tank, wherein the single-layer dilute sulfuric acid spraying layer 3 spray rate is controlled to be 20m3/h; Part of the desulfurization rate reaches 70%, and the concentration of SO 2 in the tail gas after desulfurization is 120mg/m 3 , which is lower than the national standard of 400mg/m 3 ;
（3）将步骤（1）和（2）得到的沉积到酸性溶液沉积池中硫酸通过泵13和阀门14进入到再生池（再生池的作用是循环利用生成的硫酸，提高硫酸浓度）中，最后存储到成品酸槽12。(3) Deposit the sulfuric acid obtained in steps (1) and (2) into the acidic solution deposition pool and enter the regeneration pool through the pump 13 and valve 14 (the function of the regeneration pool is to recycle the generated sulfuric acid to increase the concentration of sulfuric acid), Finally stored in finished product acid tank 12.
以上结合附图对本发明的具体实施方式作了详细说明，但是本发明并不限于上述实施方式，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下做出各种变化。The specific embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes.
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| CN113120871A (en) * | 2020-01-16 | 2021-07-16 | 吉林紫金铜业有限公司 | Method for heating desulfurization nitrogen in acid preparation by smelting flue gas |
| CN113148962A (en) * | 2021-01-19 | 2021-07-23 | 昆明理工大学 | Device and method for preparing acid from smelting flue gas by using hydrogen peroxide and activated carbon |
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Application publication date: 20160608 |