Zirconia flue gas analyzer for coal-fired power plants

1、 Overview:

OXT1000 series power plant direct insertion zirconia analyzer: 0-700 degrees, coal-fired boiler, direct insertion flange installation, OXT1PA、OXT1PB、OXT1PC、OXT1PD、OXT1P， Stainless steel 304 material, protective tube 48mm, 57mm, range: 0-25%, output 4-20mA, accuracy: 1%, power: less than 150W, power supply voltage: 220VAC

低温型： YB-88GJ-DW-400、YB-88GJ-DW-600、YB-88GJ-DW-1000、YB-88G-DW-1200mm

High temperature type: YB-88G-GWP-1000, YB-88G-GWP-1200, YB-88G series oxygen analyzer: YB-88GZ-4 and YB-88G-D、YB-88G-D-400、YB-88G-D-600、YB-88G-D-1000、YB-88G-D-1200mm、 304 material, 316L material, 0-700 degrees, 0-1400 degrees; High temperature type: SIC intake pipe, 0-25%, output: 4-20mA, flange installation: DN50, DN80, DN100; Power supply: 220VAC, disk mounted vertical: YB-88GZ-1, disk mounted horizontal: YB-88GZ-2, disk mounted square: YB-88GZ-3, YB-88G-Z medium temperature direct insertion, YB-88G-GWP high temperature extraction: high temperature intake pipe, high temperature flange, high temperature tee, jet pump, accuracy level: 1%, power less than 150V, heating furnace resistance value: 64 ohms

CECK-ISG-C series zirconia probe, CECK-ISG-CH series zirconia probe, CECK-ISG-CX series explosion-proof zirconia probe, SPE-2000 series zirconia probe, CE-2C wall mounted zirconia analyzer, CE-2D series disk mounted zirconia analyzer, CEX-S767 explosion-proof zirconia analyzer, S-2000-A series zirconia analyzer, CE-2DH zirconia analyzer

Oxygen analyzer: CE-2C, CE-2CW, CE-2CS, CE-2D, CE-2DH, CE-2DS, SPE-2000

ZO-12A in-line zirconia analyzer, ZO-12B wall mounted zirconia analyzer, LCD display, used in coal-fired power plants, in-line flange installation, 0.00-25.00%, output 4-20mA, supports HART protocol, Chinese English switching, RS485 communication full function, microcontroller integrated circuit, flange installation, outer diameter 155mm, hole spacing 130mm (customizable), protective tube material: 304, accuracy: 1%, ZO-12C, ZO-12D wear-resistant zirconia analyzer, ZO-12E, ZO-12 (Q) disk mounted display, ZO-12 (P) wall mounted oxygen analyzer, ZC-ZGRO2-3FS in-line zirconia analyzer, XM-8610TD in-line zirconia analyzer

2、 The main uses in coal-fired power plants are:

1. Combustion optimization and control (primary purpose):

Guidance on air coal ratio: Real time measurement of oxygen content in flue gas is a key indicator for determining whether boiler combustion is in a state.

Reduce energy consumption: maintain an excess air coefficient. Excessive oxygen content leads to increased smoke exhaust heat loss; Low oxygen content leads to the production of CO and unburned carbon, resulting in reduced efficiency and insecurity.

Realize automatic control: Input oxygen signal into DCS system, automatically adjust air supply volume, and achieve combustion closed-loop optimization.

2. Environmental monitoring:

Provide dry oxygen content data for calculating pollutant emission concentrations (such as SO ₂, NOx) for conversion and compliance reporting.

3. Safe operation:

Monitor low oxygen levels to prevent combustion related issuesfullyThe risk of reignition or explosion in the tail flue caused by this.

III Key points for installation and use

1. Installation location selection:

Typical location: on the vertical flue at the outlet of the economizer or the inlet of the air preheater. The flue gas here is evenly mixed and the temperature is moderate, which can represent the combustion condition at the furnace outlet.

Avoid dead corners: stay away from smoke eddies, dead corners, or dust accumulation areas.

Easy to maintain: Adequate maintenance space should be left.

2. Installation method:

Direct insertion: The sensor is directly inserted into the flue. Fast response, simple structure, is the mainstream approach. It is divided into high-temperature direct insertion type (without heater, smoke temperature needs to be>600 ℃) and low-temperature direct insertion type (with built-in heater, suitable for low-temperature flue).

3. Guarantee of key operating conditions:

Constant temperature: The zirconia probe must operate at a constant high temperature (usually controlled by a built-in heater at 700-750 ℃). Temperature fluctuations can seriously affect measurement accuracy.

Reference air: Clean, dry, and stable reference air must be provided. Usually equipped with a small air pump and filter.

Smoke conditions: It is required that the smoke flow rate be stable and avoid severe impact on the probe. For high dust smoke, dust filters or diffusion probes should be equipped.