Introduction to PPCS Air Box Pulse Bag Dust Collector

1、 General Overview

Plenum pulse bag dust collector is an advanced high-efficiency dust collector introduced from Tetra Pak. It combines the advantages of various bag dust collector for chamber back blowing and jet pulse dust removal, overcomes the disadvantages of insufficient strength of chamber back blowing dust removal and simultaneous operation of jet pulse dust removal and filtration, thus expanding the application scope of bag dust collector. Due to the special structure of this type of dust collector, the dust collection efficiency is improved and the service life of filter bag is extended.

This series of products can be widely used in the crushing, packaging, warehouse top, clinker cooler, various mills and other dust collection systems of cement plants. Anti-combustion and anti-explosion measures shall be added for dust collection of coal mill, and the structure of dust collector shall be changed accordingly. Also suitable for dust collection on very high gases containing dust. For example, for the grinding system with 0-Sepa powder concentrator, if the dust concentration of the gas reaches above 1000g/m3 (standard), this series of dust collector is adopted for dust collection. Cyclone dust collector can not be set for primary dust collection. Besides being used in cement industry, it is also applicable to dust collection of waste gases from metallurgy, chemical industry, machinery and civil boilers. Polyester needle-punched felt is generally used as the filter bag material of this series of dust collector, and the continuous use temperature is allowed to be less than 120 ° C. If the temperature rises, other filter materials shall be used, or cooling measures shall be taken before the waste gas enters the dust collector.

This series of outdoor dust collector is composed of different rooms and different bags for each room, forming a variety of different specifications. The number of bags per room is 32, 64, 96 and 128. There are 33 specifications for the whole series, with the filter bag diameter of 133mm and the filter bag length of 2450mm and 3060mm. This series of dust collector can operate under negative or positive pressure without any change in its body structure. The dust collection efficiency can reach above 99.9%, and the dust concentration of water content of purified gas is less than 100mg/m (standard). See the attached table for main technical performance of this series of dust collector. How to use this series of dust collector in cold areas. When the outdoor heating calculation temperature is less than - 25 ℃, it is required to increase the heating device, and the shell of the dust collector shall be provided with an insulation layer.

2、 Construction and operating principle

This series of dust collector is composed of shell, ash hopper, ash discharge device, support, pulse ash removal system, etc. When the dust-containing gas enters the dust collector from the air inlet and outlet, it first contacts the oblique baffle plate in the middle of the air inlet and outlet, the air flow will turn to flow into the ash hopper, at the same time, the air flow will be slowed down. Due to inertia, the coarse dust in the gas will directly fall into the ash hopper for dust collection. The air flow entering the ash hopper will then be folded upward through the filter bag with metal framework inside, and the dust will be collected on the outer surface of the filter bag. The purified gas will enter the clean room on the upper part of the filter bag room, and be collected and discharged from the air outlet pipe. The air inlet of PPCS32 dust collector is set on the ash hopper. After entering the ash hopper, the air flows into the ash hopper and contacts the baffle at the end of the air inlet pipe. Its function is the same as the above principle. The shell is divided into several Du-like dust collection chambers by clapboard, and each dust collection chamber is cleaned in turn according to the given time interval. Each dust collection chamber is equipped with a lifting valve. The lifting valve is closed during dust removal to cut off the filtered air flow through the dust collection chamber. Then the pulse valve opens to inject high pressure air into the filter bag to remove the dust on the external surface of the filter bag. The pulse injection width and ash removal period of each dust collection room are automatically and continuously performed by the special ash removal program controller.

3、 Features of air-box pulse dust collector

The air box pulse dedusting bag dust collector is characterized by dedusting by chambers in turn, i.e. the so-called offline dedusting. When a certain room is sprayed and blown for dust removal, the filter air flow is cut off, so as to avoid the secondary dust flying caused by blowing and dust removal. Therefore, the air box pulse bag dust collector can trap the gas with dust concentration up to 1000g/m3 (standard).

4、 Ash removal electrical control device

1. Ash removal control mode

Generally, timing method or fixed resistance method can be adopted for ash removal control. The so-called fixed resistance method is to control the pressure difference between the inner and outer sides of the filter bag. When the differential pressure value of the dust collector reaches the temple value (generally 1470pa), the differential pressure transmitter sends a signal through the electrical control device, that is, the dust is cleaned room by room according to the specified procedures.

2. Function of electrical device

Single-chip PLG and sequence controller are adopted for centralized control of multi-chamber dust collector, with automatic and manual control modes. In case of failure or overhaul of single chip computer, manual control can be switched at any time. In order to facilitate commissioning and equipment overhaul, local control is provided.

3. The wiring design from the dust removal electrical control device to the inlet terminal of the dust collector shall be in the charge of the selected person. Refer to the instructions of the dust removal electrical controller for the wiring terminal.

5、 Composition and supply of dust collector system

1. The body of dust collector includes shell, ash hopper, filter bag device, inlet and outlet pipes, ash discharge device and pulse blowing system (including pulse valve, pipe, valve, air source triple-connection and air storage tank)

2. The dust collector is equipped with an electrical control device for dust removal, which is generally controlled by timed dust removal. If the user requires constant resistance control, it shall be noted when ordering, and the cost of differential pressure gauge, differential pressure alarm and other instruments for constant resistance control shall be calculated separately.

3. Ash discharge device of dust collector shall be prepared according to user's requirements.

4. The user shall replace the filter cloth to meet other special requirements. If heating system is required for high and cold areas, it can be explained directly at the time of order.

5. Based on different specifications, the dust collector can be shipped as a whole or in the form of disassembly, and its basic design shall be in the charge of the selected one.

6. This series of products are provided with equipment operation and installation instructions by the manufacturer.

Technical parameters of PPCS air box pulse bag dust collector

Technical performance parameters of PPCS32 and PPCS64 air-box pulse bag dust collector

Technical performance parameters of PPCS96 air-box pulse bag dust collector

PPCS PLENUM PULSE BAG DUST COLLECTOR APPLICATION

This series of products can be widely used in the crushing, packaging, warehouse top, clinker cooler, various mills and other dust collection systems of cement plants.