CN221797059U - Sulfuric acid production device - Google Patents
Sulfuric acid production device Download PDFInfo
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- CN221797059U CN221797059U CN202421804801.9U CN202421804801U CN221797059U CN 221797059 U CN221797059 U CN 221797059U CN 202421804801 U CN202421804801 U CN 202421804801U CN 221797059 U CN221797059 U CN 221797059U
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- absorption
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- washing
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 108
- 238000005406 washing Methods 0.000 claims abstract description 77
- 239000002253 acid Substances 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 8
- 238000005201 scrubbing Methods 0.000 claims 7
- 238000005507 spraying Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 11
- 238000002360 preparation method Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 31
- 238000005192 partition Methods 0.000 description 8
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 5
- 229910052785 arsenic Inorganic materials 0.000 description 5
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 229910052731 fluorine Inorganic materials 0.000 description 5
- 239000011737 fluorine Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000013064 chemical raw material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
技术领域Technical Field
本实用新型属于非金属化合物制备技术领域，具体涉及一种硫酸生产装置。The utility model belongs to the technical field of non-metallic compound preparation, and specifically relates to a sulfuric acid production device.
背景技术Background Art
硫酸是重要的基本化工原料，在许多工业和化学应用中都发挥着重要的作用，主要用于制造无机化学肥料，也作为基础化工原料用于有色金属的冶炼、石油精炼、纺织印染以及农药医药、制革、炼焦等领域，此外还用于钢铁酸洗。Sulfuric acid is an important basic chemical raw material and plays a vital role in many industrial and chemical applications. It is mainly used in the manufacture of inorganic chemical fertilizers. It is also used as a basic chemical raw material in the smelting of non-ferrous metals, petroleum refining, textile printing and dyeing, as well as pesticides and medicines, leather making, coking and other fields. It is also used for steel pickling.
目前，一般是采用三氧化硫烟气吸收工艺生产硫酸，烟气中除三氧化硫外，还含有砷、粉尘、氟等有害杂质，因此，生产的硫酸纯度很难达到理想状态，不仅会影响硫酸的质量和使用效果，而且也会影响其安全性。另外在硫酸的生产中，洗涤塔和吸收塔均为单独设置，设备占地面积较大。At present, sulfuric acid is generally produced by sulfur trioxide flue gas absorption process. In addition to sulfur trioxide, the flue gas also contains harmful impurities such as arsenic, dust, and fluorine. Therefore, the purity of the produced sulfuric acid is difficult to reach the ideal state, which not only affects the quality and use effect of sulfuric acid, but also affects its safety. In addition, in the production of sulfuric acid, the washing tower and the absorption tower are set separately, and the equipment occupies a large area.
实用新型内容Utility Model Content
针对现有技术的上述不足，本实用新型的目的是提供一种硫酸生产装置，将洗涤塔和吸收塔合并为一个整体，减少设备占地面积，降低生产成本，提高效率，同时可得到杂质更少、纯度更高的硫酸产品。In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a sulfuric acid production device, which combines a washing tower and an absorption tower into a whole, reduces the equipment footprint, reduces production costs, improves efficiency, and at the same time can obtain a sulfuric acid product with less impurities and higher purity.
为实现上述目的，本实用新型的技术方案为：To achieve the above purpose, the technical solution of the utility model is:
本实用新型所述的硫酸生产装置，包括洗涤塔和吸收塔，洗涤塔和吸收塔一体化设置，洗涤塔位于吸收塔下部；The sulfuric acid production device described in the utility model comprises a washing tower and an absorption tower, the washing tower and the absorption tower are integrated, and the washing tower is located at the lower part of the absorption tower;
吸收塔内部底端设置有隔板，隔板上均匀设置有升气管，升气管底端与洗涤塔的内腔连通，升气管顶端固定连接有挡液帽，挡液帽与升气管之间设置有气口，吸收塔内部顶端设置有一号吸收酸分布器，吸收塔下部一侧开设吸收循环管道，吸收循环管道经循环泵后分成两路支管，其中一路支管为硫酸产品出口管道，另外一路支管延伸至吸收塔内腔并固定连接一号吸收酸分布器，吸收塔下部另一侧开设除盐水进口管道；A partition is provided at the bottom of the absorption tower, and air risers are evenly provided on the partition. The bottom of the air riser is connected to the inner cavity of the washing tower, and a liquid retaining cap is fixedly connected to the top of the air riser. An air port is provided between the liquid retaining cap and the air riser. A No. 1 absorption acid distributor is provided at the top of the absorption tower. An absorption circulation pipeline is provided at one side of the lower part of the absorption tower. The absorption circulation pipeline is divided into two branches after passing through a circulation pump, one of which is a sulfuric acid product outlet pipeline, and the other branch extends to the inner cavity of the absorption tower and is fixedly connected to the No. 1 absorption acid distributor. A desalted water inlet pipeline is provided at the other side of the lower part of the absorption tower.
洗涤塔内部底端设置有加热器，洗涤塔内部顶端设置有二号吸收酸分布器，二号吸收酸分布器正下方设置有三号吸收酸分布器，洗涤塔下部一侧开设洗涤循环管道，洗涤循环管道经循环泵后分成三个支路，其中一个支路为洗涤硫酸出口管道，另外两个支路延伸至洗涤塔内腔并分别固定连接二号吸收酸分布器和三号吸收酸分布器，洗涤塔下部另一侧分别开设硫酸进口管道和三氧化硫气体进口管道。A heater is provided at the bottom end of the washing tower, a No. 2 absorption acid distributor is provided at the top end of the washing tower, a No. 3 absorption acid distributor is provided directly below the No. 2 absorption acid distributor, a washing circulation pipe is opened on one side of the lower part of the washing tower, and the washing circulation pipe is divided into three branches after passing through a circulation pump, one of which is a washing sulfuric acid outlet pipe, and the other two branches extend to the inner cavity of the washing tower and are fixedly connected to the No. 2 absorption acid distributor and the No. 3 absorption acid distributor, respectively. A sulfuric acid inlet pipe and a sulfur trioxide gas inlet pipe are respectively opened on the other side of the lower part of the washing tower.
其中：in:
所述的挡液帽底部的直径大于升气管的直径。The diameter of the bottom of the liquid retaining cap is greater than the diameter of the air riser.
所述的升气管顶端设置有连接杆，连接杆固定连接挡液帽。A connecting rod is arranged at the top end of the air riser, and the connecting rod is fixedly connected to the liquid blocking cap.
所述的一号吸收酸分布器固定安装在吸收塔内腔侧壁。The No. 1 absorption acid distributor is fixedly installed on the side wall of the inner cavity of the absorption tower.
所述的一号吸收酸分布器的喷淋口朝下设置。The spray port of the No. 1 acid absorbing distributor is arranged downward.
所述的硫酸进口管道位于三氧化硫气体进口管道的上方，硫酸进口管道位于三号吸收酸分布器的下方。The sulfuric acid inlet pipeline is located above the sulfur trioxide gas inlet pipeline, and the sulfuric acid inlet pipeline is located below the No. 3 absorption acid distributor.
所述的加热器一端固定安装在洗涤塔内腔侧壁。One end of the heater is fixedly mounted on the side wall of the inner cavity of the washing tower.
所述的二号吸收酸分布器固定安装在洗涤塔内腔侧壁。The second absorption acid distributor is fixedly installed on the side wall of the inner cavity of the washing tower.
所述的二号吸收酸分布器的喷淋口朝下设置。The spray port of the No. 2 acid absorbing distributor is arranged downward.
所述的三号吸收酸分布器固定安装在洗涤塔内腔侧壁，三号吸收酸分布器的喷淋口朝下设置。The No. 3 absorption acid distributor is fixedly installed on the side wall of the inner cavity of the washing tower, and the spray port of the No. 3 absorption acid distributor is arranged downward.
本实用新型所具有的有益效果为：The beneficial effects of the utility model are:
本实用新型所述的硫酸生产装置为洗涤塔和吸收塔一体化设置，洗涤塔内的洗涤硫酸，经循环泵送至洗涤塔对三氧化硫气体进行循环洗涤，以除去残余的砷、粉尘、氟等有害杂质，净化后的三氧化硫气体进入吸收塔，用除盐水吸收三氧化硫制备硫酸产品。本实用新型可减少设备占地面积，降低生产成本，提高效率，同时可得到杂质更少、纯度更高的硫酸产品。The sulfuric acid production device described in the utility model is an integrated arrangement of a washing tower and an absorption tower. The washing sulfuric acid in the washing tower is pumped to the washing tower through a circulation pump to circulate and wash the sulfur trioxide gas to remove residual arsenic, dust, fluorine and other harmful impurities. The purified sulfur trioxide gas enters the absorption tower and is absorbed by desalted water to prepare sulfuric acid products. The utility model can reduce the equipment footprint, reduce production costs, improve efficiency, and at the same time obtain sulfuric acid products with fewer impurities and higher purity.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本实用新型的结构示意图；Fig. 1 is a schematic diagram of the structure of the utility model;
图2是本实用新型的隔板的俯视图；FIG2 is a top view of the partition of the utility model;
图3是本实用新型的升气管、挡液帽和气口的结构示意图；FIG3 is a schematic structural diagram of the air riser, liquid retaining cap and air port of the utility model;
图中：1、洗涤塔；11、洗涤硫酸出口管道；12、硫酸进口管道；13、三氧化硫气体进口管道；14、加热器；15、二号吸收酸分布器；16、三号吸收酸分布器；17、洗涤循环管道；2、吸收塔；21、硫酸产品出口管道；22、一号吸收酸分布器；23、除盐水进口管道；24、吸收循环管道；3、隔板；4、升气管；5、挡液帽；51、气口。In the figure: 1. washing tower; 11. washing sulfuric acid outlet pipeline; 12. sulfuric acid inlet pipeline; 13. sulfur trioxide gas inlet pipeline; 14. heater; 15. No. 2 absorption acid distributor; 16. No. 3 absorption acid distributor; 17. washing circulation pipeline; 2. absorption tower; 21. sulfuric acid product outlet pipeline; 22. No. 1 absorption acid distributor; 23. desalted water inlet pipeline; 24. absorption circulation pipeline; 3. partition; 4. riser; 5. liquid retaining cap; 51. gas port.
具体实施方式DETAILED DESCRIPTION
下面结合附图对本实用新型的实施例做进一步描述。The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.
实施例1Example 1
如图1、图2、图3所示，所述的硫酸生产装置，包括洗涤塔1和吸收塔2，洗涤塔1和吸收塔2一体化设置，洗涤塔1位于吸收塔2下部；As shown in FIG. 1 , FIG. 2 and FIG. 3 , the sulfuric acid production device comprises a washing tower 1 and an absorption tower 2, the washing tower 1 and the absorption tower 2 are integrated, and the washing tower 1 is located at the lower part of the absorption tower 2;
吸收塔2内部底端设置有隔板3，隔板3上均匀设置有升气管4，升气管4底端与洗涤塔1的内腔连通，升气管4顶端固定连接有挡液帽5，挡液帽5与升气管4之间设置有气口51，吸收塔2内部顶端设置有一号吸收酸分布器22，吸收塔2下部一侧开设吸收循环管道24，吸收循环管道24经循环泵后分成两路支管，其中一路支管为硫酸产品出口管道21，另外一路支管延伸至吸收塔2内腔并固定连接一号吸收酸分布器22，吸收塔2下部另一侧开设除盐水进口管道23；A partition 3 is provided at the bottom end of the absorption tower 2, and an air riser 4 is evenly provided on the partition 3. The bottom end of the air riser 4 is communicated with the inner cavity of the washing tower 1, and a liquid retaining cap 5 is fixedly connected to the top of the air riser 4. An air port 51 is provided between the liquid retaining cap 5 and the air riser 4. A No. 1 absorption acid distributor 22 is provided at the top end of the absorption tower 2. An absorption circulation pipeline 24 is provided at one side of the lower part of the absorption tower 2. The absorption circulation pipeline 24 is divided into two branches after passing through a circulation pump, one of which is a sulfuric acid product outlet pipeline 21, and the other branch extends to the inner cavity of the absorption tower 2 and is fixedly connected to the No. 1 absorption acid distributor 22. A desalted water inlet pipeline 23 is provided at the other side of the lower part of the absorption tower 2;
洗涤塔1内部底端设置有加热器14，洗涤塔1内部顶端设置有二号吸收酸分布器15，二号吸收酸分布器15正下方设置有三号吸收酸分布器16，洗涤塔1下部一侧开设洗涤循环管道17，洗涤循环管道17经循环泵后分成三个支路，其中一个支路为洗涤硫酸出口管道11，另外两个支路延伸至洗涤塔1内腔并分别固定连接二号吸收酸分布器15和三号吸收酸分布器16，洗涤塔1下部另一侧分别开设硫酸进口管道12和三氧化硫气体进口管道13。A heater 14 is provided at the bottom end of the washing tower 1, a No. 2 absorption acid distributor 15 is provided at the top end of the washing tower 1, a No. 3 absorption acid distributor 16 is provided directly below the No. 2 absorption acid distributor 15, a washing circulation pipeline 17 is opened on one side of the lower part of the washing tower 1, and the washing circulation pipeline 17 is divided into three branches after passing through a circulation pump, one of which is a washing sulfuric acid outlet pipeline 11, and the other two branches extend to the inner cavity of the washing tower 1 and are fixedly connected to the No. 2 absorption acid distributor 15 and the No. 3 absorption acid distributor 16, respectively. A sulfuric acid inlet pipeline 12 and a sulfur trioxide gas inlet pipeline 13 are respectively opened on the other side of the lower part of the washing tower 1.
三氧化硫气体进入洗涤塔1向上流动，同时与从洗涤塔1内的二号吸收酸分布器15和三号吸收酸分布器16喷射出的洗涤硫酸接触，三氧化硫气体中的砷、粉尘、氟等有害杂质被洗涤硫酸溶解；净化后的三氧化硫气体通过挡液帽5与升气管4之间的气口51进入吸收塔2，净化后的三氧化硫气体在吸收塔2内向上流动，同时与从吸收塔2内的一号吸收酸分布器22喷射出的除盐水与硫酸的混合液体接触，除盐水吸收净化后的三氧化硫气体，得到杂质更少、纯度更高的硫酸产品，纯度为98wt%。The sulfur trioxide gas enters the washing tower 1 and flows upward, and at the same time contacts with the washing sulfuric acid ejected from the No. 2 absorption acid distributor 15 and the No. 3 absorption acid distributor 16 in the washing tower 1, and harmful impurities such as arsenic, dust, and fluorine in the sulfur trioxide gas are dissolved by the washing sulfuric acid; the purified sulfur trioxide gas enters the absorption tower 2 through the gas port 51 between the liquid blocking cap 5 and the gas riser 4, and the purified sulfur trioxide gas flows upward in the absorption tower 2, and at the same time contacts with the mixed liquid of deionized water and sulfuric acid ejected from the No. 1 absorption acid distributor 22 in the absorption tower 2, and the deionized water absorbs the purified sulfur trioxide gas to obtain a sulfuric acid product with less impurities and higher purity, with a purity of 98wt%.
挡液帽5底部的直径大于升气管4的直径。防止吸收塔2内除盐水与硫酸的混合液体落入升气管4中。The diameter of the bottom of the liquid-blocking cap 5 is larger than the diameter of the gas riser 4 , so as to prevent the mixed liquid of deionized water and sulfuric acid in the absorption tower 2 from falling into the gas riser 4 .
升气管4顶端设置有连接杆，连接杆固定连接挡液帽5。A connecting rod is provided at the top of the riser pipe 4 , and the connecting rod is fixedly connected to the liquid blocking cap 5 .
一号吸收酸分布器22固定安装在吸收塔2内腔侧壁。The first absorption acid distributor 22 is fixedly installed on the side wall of the inner cavity of the absorption tower 2.
一号吸收酸分布器22的喷淋口朝下设置。确保除盐水与硫酸的混合液体均匀分布。The spray port of the first absorption acid distributor 22 is set downward to ensure that the mixed liquid of desalted water and sulfuric acid is evenly distributed.
硫酸进口管道12位于三氧化硫气体进口管道13的上方，硫酸进口管道12位于三号吸收酸分布器16的下方。The sulfuric acid inlet pipeline 12 is located above the sulfur trioxide gas inlet pipeline 13 , and the sulfuric acid inlet pipeline 12 is located below the No. 3 absorption acid distributor 16 .
加热器14一端固定安装在洗涤塔1内腔侧壁。加热器14对洗涤塔1内的洗涤硫酸预热升温，使洗涤硫酸尽量不吸收三氧化硫气体。One end of the heater 14 is fixedly mounted on the inner cavity side wall of the washing tower 1. The heater 14 preheats the washing sulfuric acid in the washing tower 1 to increase the temperature so that the washing sulfuric acid does not absorb sulfur trioxide gas as much as possible.
二号吸收酸分布器15固定安装在洗涤塔1内腔侧壁。The second absorption acid distributor 15 is fixedly installed on the inner cavity side wall of the washing tower 1.
二号吸收酸分布器15的喷淋口朝下设置。The spray port of the second absorption acid distributor 15 is arranged downward.
三号吸收酸分布器16固定安装在洗涤塔1内腔侧壁，三号吸收酸分布器16的喷淋口朝下设置。The third absorption acid distributor 16 is fixedly installed on the inner cavity side wall of the washing tower 1, and the spray port of the third absorption acid distributor 16 is arranged downward.
二号吸收酸分布器15和三号吸收酸分布器16的设置确保洗涤硫酸均匀分布，洗涤硫酸吸收溶解三氧化硫气体中的砷、粉尘、氟等有害杂质，得到净化的三氧化硫气体。The arrangement of the second absorption acid distributor 15 and the third absorption acid distributor 16 ensures uniform distribution of the washing sulfuric acid, and the washing sulfuric acid absorbs and dissolves harmful impurities such as arsenic, dust, and fluorine in the sulfur trioxide gas to obtain purified sulfur trioxide gas.
工作原理及过程：通过除盐水进口管道23向吸收塔2中打入除盐水，开启循环泵，除盐水经过吸收循环管道24流回吸收塔2；通过硫酸进口管道12向洗涤塔1中打入洗涤硫酸，利用加热器14对洗涤硫酸预热升温，开启循环泵，洗涤硫酸经过洗涤循环管道17流回洗涤塔1；打开三氧化硫气体进口管道13，三氧化硫气体进入洗涤塔1向上流动，同时与从洗涤塔1内的二号吸收酸分布器15和三号吸收酸分布器16喷射出的洗涤硫酸接触，三氧化硫气体中的砷、粉尘、氟等有害杂质被洗涤硫酸溶解；净化后的三氧化硫气体通过挡液帽5与升气管4之间的气口51进入吸收塔2；净化后的三氧化硫气体在吸收塔2内向上流动，同时与从吸收塔2内的一号吸收酸分布器22喷射出的除盐水与硫酸的混合液体接触，除盐水吸收净化后的三氧化硫气体，得到杂质更少、纯度更高的硫酸产品，除盐水与硫酸的混合液体自上而下降落，一部分直接落入隔板3上，其余部分落在挡液帽5后再流入隔板3上，由于挡液帽5底部的直径大于升气管4的直径，混合液体不会落入升气管4中。Working principle and process: desalted water is pumped into the absorption tower 2 through the desalted water inlet pipe 23, the circulation pump is turned on, and the desalted water flows back to the absorption tower 2 through the absorption circulation pipe 24; washing sulfuric acid is pumped into the washing tower 1 through the sulfuric acid inlet pipe 12, the washing sulfuric acid is preheated by the heater 14, the circulation pump is turned on, and the washing sulfuric acid flows back to the washing tower 1 through the washing circulation pipe 17; the sulfur trioxide gas inlet pipe 13 is opened, the sulfur trioxide gas enters the washing tower 1 and flows upward, and at the same time contacts with the washing sulfuric acid ejected from the No. 2 absorption acid distributor 15 and the No. 3 absorption acid distributor 16 in the washing tower 1, and harmful impurities such as arsenic, dust, and fluorine in the sulfur trioxide gas are removed. The washing sulfuric acid is dissolved; the purified sulfur trioxide gas enters the absorption tower 2 through the air port 51 between the liquid retaining cap 5 and the gas riser 4; the purified sulfur trioxide gas flows upward in the absorption tower 2, and at the same time contacts with the mixed liquid of desalted water and sulfuric acid sprayed from the No. 1 absorption acid distributor 22 in the absorption tower 2, and the desalted water absorbs the purified sulfur trioxide gas to obtain a sulfuric acid product with less impurities and higher purity, and the mixed liquid of desalted water and sulfuric acid falls from top to bottom, a part of which falls directly on the partition 3, and the rest falls on the liquid retaining cap 5 and then flows into the partition 3. Since the diameter of the bottom of the liquid retaining cap 5 is larger than the diameter of the gas riser 4, the mixed liquid will not fall into the gas riser 4.
洗涤三氧化硫气体杂质的洗涤硫酸经洗涤塔1开设的洗涤硫酸出口管道11排出，除盐水吸收三氧化硫气体制备的硫酸产品经吸收塔2开设的硫酸产品出口管道21排出。The washing sulfuric acid used to wash the impurities in the sulfur trioxide gas is discharged through the washing sulfuric acid outlet pipe 11 provided in the washing tower 1 , and the sulfuric acid product prepared by the desalted water absorbing the sulfur trioxide gas is discharged through the sulfuric acid product outlet pipe 21 provided in the absorption tower 2 .
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