Guoke Hanhai Laser Technology has built an invisible safety line for this high-risk tank farm with a set of "laser monitoring sky network".

1. Project Background: Why Does the Ethylene Tank Farm Need "Laser Upgrade"?

As the "core fortress" of petrochemical production, ethylene tank farms have long faced "two major pain points" with traditional monitoring methods:

Monitoring blind spots: Traditional point sensors are difficult to reach leak-prone areas such as tank bottom flanges and hidden pipeline connections, forming "monitoring dead ends";

Response lag: Due to insufficient sensitivity, traditional equipment often fails to alarm until gas diffuses to a certain concentration during low-concentration leaks, leaving extremely limited time for disposal.

In accordance with the "Code for Design of Detector and Alarm for Flammable and Toxic Gases in Petrochemical Industry" (GB/T50493-2019), ethylene tank farms as major hazard sources must upgrade their monitoring systems. Guoke Hanhai's laser monitoring technology is designed to solve these problems—it can capture leaks with ppm-level precision (one part per million concentration), cover a 100-meter range with non-contact monitoring, and eliminate safety risks of manual inspection from the source.

2. Technical Solution: How Do 6 Laser Devices Weave an "All-Coverage Protection Network"?

Tailored to the layout characteristics of Yanshan Petrochemical's ethylene tank farm, Guoke Hanhai designed a collaborative monitoring scheme of "scanning + reflection":

4 Fixed Scanning Laser Telemeters: "360-Degree Safety Sentinels" of the Tank Farm

These devices are installed at key locations of ABCD, EF, GH, and JZ tank farms. 2-meter-high poles position the laser beams to exactly cover the upward diffusion path of ethylene after leakage. Equipped with 360-degree rotating scanning function, they have a monitoring radius of over 50 meters and can scan key areas such as tank bodies, loading/unloading zones, and pipeline connections in real time like "radars". Even minor leaks from valves on tank tops can be captured instantly.

2 Fixed Reflective Laser Telemeters: "Laser Warning Lines" for Pipelines

Along the ethylene transmission pipelines, two sets of devices are installed opposite each other to form an unobstructed 100-meter laser light path. The transmitting end and reflecting end are precisely aligned, with the laser beam spanning over the pipelines—once a pipeline leaks, when gas passes through the beam, specific wavelengths of the laser will be absorbed, and the system will alarm immediately. This "opposed emission" design perfectly solves the monitoring problem of long-distance pipelines.

All devices are connected to the monitoring center via optical fibers, and data transmission adopts redundant design to ensure uninterrupted monitoring even in case of single-point failure. Real-time concentration data of each area is displayed on the screen of the central control room, and acousto-optic alarm is triggered immediately when exceeding the standard, with the leak location accurate to the meter level.

3. Practical Acceptance: How Sharp Are the Laser "Eyes"?

In the acceptance test in December 2023, technicians simulated ethylene leakage with professional gas cylinders, and the performance of the laser monitoring system was amazing:

In the ABCD tank farm, at the moment of simulated leakage, the device immediately displayed a concentration value of 21119 ppm·m, and the alarm was triggered in only 0.3 seconds;

In the test of the GH tank farm, the maximum monitoring value reached 36785 ppm·m, far exceeding the design accuracy requirements, and the data was stable without fluctuations;

The reflective devices along the pipelines also responded accurately to trace leaks 100 meters away, verifying the reliability of long-distance monitoring.

These tests prove that whether it is the "surface" of the tank farm or the "line" of the pipelines, this system can achieve "all-coverage, millisecond-level, high-precision" monitoring.

4. Value Upgrade: From "Passive Firefighting" to "Active Prevention and Control"

This laser monitoring system has brought three major qualitative changes to Yanshan Petrochemical:

Leapfrog Improvement in Safety Level

Monitoring range expanded from "points" to "surfaces", eliminating more than 90% of traditional blind spots;

Response speed reduced from "minute-level" to "millisecond-level", gaining crucial time for emergency disposal;

Non-contact monitoring allows personnel to avoid approaching high-risk areas, reducing inspection risks from the source.

Dual Benefits of Environmental Protection and Economy

Accurately capturing trace leaks, reducing ethylene emissions, and helping with VOCs (Volatile Organic Compounds) emission reduction;

Avoiding equipment damage and production shutdown losses caused by leaks, which can reduce potential economic losses by tens of millions of yuan per year based on annual production capacity estimates.

Industry Demonstration Significance

As a "benchmark project" for ethylene tank farm monitoring, its collaborative "scanning + reflection" scheme and installation layout based on gas diffusion characteristics provide a replicable technical model for the same industry, promoting the upgrade of major hazard source monitoring in the petrochemical industry from "compliance with standards" to "intrinsic safety".

5. Postscript: Technology Guards the Safety of "Industrial Blood"

The safety of ethylene tank farms is a microcosm of safe production in the petrochemical industry. Guoke Hanhai's laser monitoring technology redefines the safety standards of high-risk areas with the speed and precision of "light".

In the future, this system will be deeply integrated with Yanshan Petrochemical's production management platform. Through AI analysis of historical data, it will realize "leakage trend prediction"—when there is a slight fluctuation in concentration, the system will prompt inspection, making "zero leakage" possible from a goal.

On the road of safeguarding energy security, every technological breakthrough shortens the distance between "risk" and "safety". Guoke Hanhai has always believed that only by building a solid line of defense with technology can every factory and every tank farm become a strong fortress for safe production.