HJ 935-2017 in English
VALIDTechnical specification for application and issuance of pollutant permit non-ferrous metal metallurgy industry-titanium smelting
- Issued on:2017-12-27
- Implemented on:2017-12-27
- File Format:PDF
- Delivery:Via email within 5 business days
$1,397.00
本标准规定了钛冶炼排污单位排污许可证申请与核发的基本情况填报要求、许可排放限值确定、实际排放量核算、合规判定的方法以及自行监测、环境管理台账与排污许可证执行报告等环境管理要求，提出了钛冶炼排污单位污染防治可行技术。
本标准适用于指导钛冶炼排污单位填报《排污许可证申请表》及在全国排污许可证管理信息平台申报系统中填报相关申请信息，适用于指导核发机关审核确定钛冶炼排污单位排污许可证许可要求。
本标准适用于以钛冶炼排污单位排放的大气污染物、水污染物的排污许可管理。
本标准未做出规定但排放工业废水、废气或国家规定的有毒有害大气污染物的钛冶炼排污单位其他产污设施和排放口，参照《排污许可证申请与核发技术规范 总则》执行；在《排污许可证申请与核发技术规范 锅炉工业》发布前，热水锅炉和65t/h及以下蒸汽锅炉参照本标准执行，发布后从其规定。
Introduction
Standard background and scope of application
This standard is formulated in accordance with the "Environmental Protection Law", "Air Pollution Prevention and Control Law" and other laws and regulations. It is applicable to sponge titanium production enterprises that use titanium concentrate, ilmenite or titanium tetrachloride as raw materials, and covers the pollution discharge permit management of the production of products such as titanium slag, titanium tetrachloride and sponge titanium.
Core Management Requirements
| Management Dimensions | Waste Gas Control | Waste Water Control |
|---|---|---|
| Main Emission Outlets | Titanium Slag Smelting Electric Furnace Flue Gas Emission Outlet | Total Waste Water Outlet |
| Characteristic Pollutants | Particulate Matter, SO₂, NOx, Chlorine | Total Chromium, COD, Ammonia Nitrogen |
| Basis for Permitted Limits | GB 13271, GB 25468 | GB 25468 |
Key technical points
Emission calculation method
Annual permitted emission calculation formula for waste gas:
Eyear=Σ(Pi×Qbenchmark×capacity×10-6)
Among them, the benchmark exhaust volume of the titanium slag smelting electric furnace is 5000m³/t product, and that of the titanium tetrachloride preparation system is 2800m³/t product.
Feasible technologies for pollution prevention and control
- Titanium slag electric furnace flue gas: electric bag composite dust removal + limestone-gypsum desulfurization
- Chlorine treatment: two-stage alkaline washing process
- Wastewater treatment: neutralization-coagulation-sedimentation combined process
Implementation suggestions
- Establish a full-process pollution source ledger, focusing on recording the operating parameters of key equipment such as electric furnace and chlorination furnace
- Install an online flue gas monitoring system (CEMS), and keep the monitoring data for no less than 3 years
- Carry out unorganized emission detection every quarter, focusing on the unorganized emission of chlorine
- During the emergency period of heavy pollution weather, limit production and reduce emissions by 20% of the approved production capacity
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