Dust explosion protection in Europe

HRD barrier

Producer: RSBP

The HRD barrier is designed to contain an explosion in pipelines, conveyors and similar equipment. Its purpose is to prevent flames from spreading to other process areas.

  • Description
  • Technical features
  • Documentation
  • Installation & Maintenance
Description

The HRD (High Rate Discharge) barrier detects the onset of an explosion and introduces an extinguishing agent into the equipment to limit the spread of the flame front to other items of process equipment.

An initial local explosion causes an increase in temperature and pressure of the dust/air mixture in the pipeline. Highly sensitive HRD barrier sensors react to changes in parameters and transmit an alarm signal to the controller. The controller issues a command to activate the HRD cylinders in the area where an accident might occur. Temperatures and pressures are reduced to safe levels for personnel and equipment, and explosion products do not escape from the equipment. The entire accident containment process takes no more than 60 ms.

The main elements of the hrd barrier are: the detectors, consisting of a sensor, sensor and contactor; the CONEX controller; the HRD cylinder (container) with extinguishing agent.

explosion protection stages

The HRD barrier consists essentially of the same components as the HRD system, but it uses nozzles on cylinders with a special geometry. They distribute the extinguishing agent in a flat plume (fan). This forms a barrier of explosive suppressant across the entire cross-section of the pipeline.

Advantages

  1. Quickly suppresses an explosion – no more than 60 ms elapses between detection and application of an explosive suppressant. The products of the explosion do not escape outside the equipment.
  2. Easy to assemble – installation consists of only two steps, according to ready-made drawing sets and assembly instructions.
  3. Easy to maintain – we will provide a detailed instruction manual, describing the frequency of all operations. The customer’s employees are only required to visually check the cleanliness and integrity of the components and check the pressure on the HRD cylinders monthly.
  4. Can be applied to most technological processes at storage and processing facilities of vegetable raw materials.
  5. Installed without changing the design of existing technological equipment.
  6. Can be used in open areas and enclosed spaces.
  7. Active components (HRD cylinders) are easy to replace after use.
Technical features

The HRD barrier uses a DETEX type pressure detector as well as LUMEX 1 and LUMEX 3 type optical infra-red detectors.

The CONEX control centre is available in two-zone, four-zone, six-zone or eight-zone versions. It features a system status display and service mode switches. The integrated rechargeable battery guarantees at least 4 hours of autonomous operation in the event of a power failure.

The HRD cylinder uses ABC fine extinguishing powder: FUREX 770, SODA BICARBONA, TROPOLAR FORTE, etc.

Pressure vessel type A1 A2 B C D E G
Volume [l] 5.34 5.34 8 20 20 50 50
Working pressure [bar] 120 120 50 50 50 50 50
Valve dimensions 3/4″ 3/4″ 3″ 3″ 4″ 3″ 4″
VIDEO – HDR SYSTEM TEST – ACTIVE EXPLOSION SUPPRESSION
MANUFACTURER: RSBP S.R.O.

Documentation

Technical sheet CONEX
En
  • En
Technical sheet Detex
En
  • En
Technical sheet Lumex
En
  • En
Technical sheet HRD cylinders
En
  • En
Technical sheet HRD nozzles
En
  • En
Catalog
Ru
  • Ru
Installation

The sensors and HRD-Balloons (active elements) are installed in the pipelines. Mounting is by means of mounting adapters, receivers, holders, flanges, etc. Documentation with drawings is included to help you understand the mechanical assembly.

In the second step, the cabling is connected and the system is set up and parameterised. The HRD barrier is then brought into service. The equipment is accepted and handed over to the customer and appropriate induction training is provided. The delivery documentation includes a section on electrical equipment to assist in this phase.

We will hand over to the customer:

  • operating instructions in Russian;
  • set of assembly drawings;
  • assembly instructions;
  • certificate of conformity for TP 012 / 2011.
Maintenance

A detailed user manual in Russian is included in the scope of delivery. On the basis of this, the customer draws up his own instruction manual in which he describes the action to be taken by the personnel.
Technical maintenance of the HRD barrier consists in permanent optical and visual inspection for cleanliness, mechanical integrity of all components. Once a month, the following actions must be carried out:

  • Maintenance of the pressurised air supply unit for blowing out the optical detectors, if any;
  • Monitoring of the operating pressure on the HRD cylinder pressure gauges.

All faults are reported to ATEX.CENTER by the customer.

The hrd barrier is serviced at the intervals specified in the operating manual:

  • once every 6 months – checks of HRD system and/or HRD barrier (control units, detectors, HRD receptacles);
  • once a year – checks of HRD receptacles, nozzles, extinguishing medium and its distribution, pipes;
  • Every 3 years – replacement of the internal accumulator in control units (batteries), replacement of the HRD activator;
  • every 10 years – pressure test of HRD receptacles in accordance with the applicable statutory regulations.

Advantages of working with ATEX.CENTER

The customer will have no problems with the supply of components and service. ATEX.CENTER is an official distributor of the leading European distributor of explosion protection equipment RSBP spol. s r.o. Our specialists periodically confirm their qualification in his commission of expertise.
The customer will have no problems with the supply of components and service. ATEX.CENTER is an official distributor of the leading European distributor of explosion protection equipment RSBP spol. s r.o. Our specialists periodically confirm their qualification in his commission of expertise.
The customer will not have any problems with the supply of components and service maintenance. ATEX.CENTER.
The customer will not have any problems with the supply of components and service maintenance. ATEX.CENTER.
We open representative offices where our customers work. The customer saves time on service maintenance.
We open representative offices where our customers work. The customer saves time on service maintenance.
We cooperate with European experts in the field of ATEX. The customer receives professional experience in explosion protection.
We cooperate with European experts in the field of ATEX. The customer receives professional experience in explosion protection.
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