From the Jinpeng Project Archive: Two 12-TPD Batch Waste Tire Pyrolysis Lines at an Urban-Adjacent Site in Hohhot, Inner Mongolia, 2019

Project Details

A Capital-Region Site Changes the Design Questions

Few siting decisions carry as much weight as proximity to a capital city. Hohhot, the administrative center of the Inner Mongolia Autonomous Region, is a city where land is valued, attention is close, and a tire-processing facility stands in view of both the public and the regulators who answer for it. This 2019 archive project - two batch reactors with a combined design capacity of 24 TPD - is a study in how a modest-scale pyrolysis plant adapts to that condition. The interesting question is not whether two batch units can convert tires, but how emission treatment, site footprint, and everyday operation were designed to hold up to urban-adjacent scrutiny.

Project Background & Configuration Logic

For a site on the fringe of a regional capital, the central design problem is not feedstock availability but the terms on which a processing facility can exist there. The configuration was designed to answer those terms directly. Batch operation concentrates processing into defined cycles rather than a continuous feed line, narrowing the moments when the plant is actively loading, heating, or discharging. Two reactors give the site enough throughput to justify shared utility and treatment systems while keeping each line small enough for an urban-adjacent plot.

The scale formed around a two-unit logic: one reactor would be too small to amortize shared treatment equipment, while a capital-region context favors restraint in footprint. At 12 TPD per unit, each reactor matches a batch rhythm of roughly 24 hours, and the two lines can be scheduled in staggered rotation so that heating, cooling, and discharging are spread rather than concentrated. The design intent is containment: contained processing, contained material flow, and an emission-treatment train sized for a location where it will be looked at.

Core Technology & Production Analysis

Emission-Treatment Attention in a Capital-Region Setting

The defining feature of an urban-adjacent installation is the attention paid to what leaves the site. The system is designed to operate as a sealed process loop under micro-negative pressure, so pyrolysis vapors and gases are held within the process rather than released to the plant environment. The vapor stream first passes through condensation, where the bulk of it is converted to liquid pyrolysis oil; the remaining non-condensable gas may be returned to the heating system where the installed design and operating conditions permit, recovering energy and shrinking the gas volume that must be handled. Flue gas from the heating side passes through a treatment train - a spray tower with alkali neutralization followed by an adsorption tower for desulfurization and dedusting - designed, after the installed treatment system and under proper operating conditions, to meet applicable local emission requirements.

A Compact Footprint Where Land Is at a Premium

Two reactors sharing one utility core keep the plot small. Cooling water, flue gas treatment, and product collection are shared, keeping the site closer to a single installation than to two independent ones; a single XY-8 line occupies an installation area on the order of 35 m × 20 m, and shared utilities hold the two-line site within a similar envelope. There is no continuous feed bunker or conveyor gallery: material enters in defined loading windows. For a capital-region parcel, that difference in land requirement can be decisive.

Feedstock Intake and Yard Management Near a Populated Area

Waste tires arrive whole or cut and are loaded in batches. Near a populated area, yard management is as visible as the process: covered storage keeps litter and dust from drifting to the boundary, stockpile rotation is planned around the intake needed for 24 TPD combined design capacity, and staggered loading spreads truck arrivals across the day. These are ordinary logistics made consequential by location: a boundary-adjacent site tolerates far less slack in housekeeping.

Staggered Scheduling Around the Batch Cycle

Each reactor follows a batch cycle of roughly 22-24 hours: loading about two hours, preheat about four, pyrolysis about ten, cooling four to six, and discharge about two. With staggered schedules, one reactor is typically in its pyrolysis hold while the other cools or discharges, evening out heat demand, spreading the physical work, and letting a small crew - the equipment is designed to be run by one or two operators per plant - keep both lines moving without peak-load staffing. It is the difference between two reactors and a working two-line schedule.

Condensation, Gas Handling, and Product Boundaries

The main recovered streams are pyrolysis oil, recovered carbonaceous material, and steel wire. Condensed oil goes to storage as fuel oil; the solid residue is discharged as recovered carbonaceous material; steel wire is separated during discharge. Product boundaries matter as much as yields. The oil is a fuel oil, not diesel - reaching a diesel-class product would require further distillation, hydrotreating, and certification testing. The carbonaceous solid is recovered carbonaceous material, not commercial-grade carbon black, unless it is deep-processed and tested for that use. Stating these boundaries keeps the project's outputs honest - itself a public-facing concern on a scrutinized site.

Public-Facing Operation and Delivery Scope

A plant near a capital city is also judged by how it looks and behaves. The horizontal rotary reactors turn slowly - about 0.4 revolutions per minute - and the process runs enclosed, keeping noise and visible activity contained to defined windows. Installation guidance and operator training were part of the delivery scope, so the small crew could run the staggered schedule and treatment systems as designed. These are delivery-scope facts, not field observations; no recent site-visit records exist.

Photo 1

Overall view of the two-unit batch pyrolysis site in Hohhot, Inner Mongolia, showing the paired reactor lines and shared treatment systems on a compact urban-adjacent plot. Photo taken during installation and commissioning in 2019.

Photo 2

Process detail from the Hohhot project, showing the batch loading and reactor arrangement of one 12-TPD line. Photo taken during installation and commissioning in 2019.

Project Specifications

What the Project Demonstrates

This project demonstrates that a batch pyrolysis plant can be configured for a capital-region, urban-adjacent site - not through exotic equipment, but by weighting the ordinary design decisions correctly: an emission-treatment train sized for close regulatory attention, a footprint held compact by shared utilities and batch material handling, and a staggered schedule that keeps daily activity contained. For clients evaluating sites near cities or sensitive boundaries, the reference value is the configuration logic: what the emission system is designed to achieve, how much land the plant actually needs, and how the operation presents itself to its neighbors. Evaluators should watch those three things - and treat the stated capacity as a design value, since actual throughput depends on feedstock and operating conditions.

About Jinpeng

Shangqiu Jinpeng Industrial Co., Ltd. designs and manufactures batch, semi-continuous, and continuous pyrolysis plants, oil distillation systems, and supporting equipment for waste tires, waste plastics, oil sludge, rubber-derived materials, and other suitable carbon-rich feedstocks. Project configuration is developed around material characteristics, production objectives, site conditions, and applicable local requirements. For project discussions, visit www.pyrolysis-machine.com.

Disclaimer

All capacities stated in this article are design values, not guaranteed outputs. Actual throughput depends on feedstock type and condition, operating practices, and site conditions. Product yields and properties vary with feedstock and require testing for any specific use. Energy consumption and emission performance depend on the auxiliary systems installed and on actual operation; the installed treatment systems are designed to meet applicable local requirements under proper operating conditions. Any final design must comply with the regulations of the project location.

Archive Note: This retrospective is based on Jinpeng's project records and photographs from the original delivery and commissioning period. It describes the documented project configuration and does not constitute verification of the plant's current operating status.