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Water Heat Medium Air Preheater With Flue Gas Heat Exchanger / Q235B Shell

Shanghai Marine Diesel Engine Research Institute

Water Heat Medium Air Preheater With Flue Gas Heat Exchanger / Q235B Shell

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Brand Name : QIYAO

Certification : ISO

Place of Origin : China

MOQ : 1 set

Price : Customized Product, Quoted Case By Case

Delivery Time : 4~8 months after PO

Packaging Details : Seaworthy Packing

Material : Carbon Steel, Stainless Steel

Packing : Seaworthy Packing

Service : Design, supply with supervision on site installation, commisioning & training

Application : Refineries, Petrochemical industries, etc.

Function : To produce superheated steam without fuel consumption

Environment Impact : Friendly emission: Low NOx, SOx & catalyst dust

Customised : Available

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Water Heat Medium Air Preheater With Flue Gas Heat Exchanger / Q235B Shell


Water-Heat-Medium technology
The water-heat-medium technology mainly functions to further recover the heat in low temperature flue gas while make sure that no corrosion is caused at the equipment so as to maximize the energy saving and minimize the energy consumption.

Work Principle/Flow
* The water-heat-medium system mainly consists of flue gas heat exchanger, medium heat exchanger (air preheater, feedwater preheater or other medium preheater), hot water circulation pump, regulating valve set and etc. The flue gas heat exchanger is located at the flue duct at the tail of heating furnace or boiler and the medium heat exchanger is located at the flow path of the medium to be heated.

* The water-heat-medium system uses a medium pressure deaerated water (2.5~5.0MPa) to maintain the operating pressure of the system and improve the saturation temperature of the heat medium water, which is helpful to improve the heat transfer grade and maximize the waste heat recovery process. During normal operation, water-heat-medium system itself does not consume any deaerated water.

* The hot water circulation pump functions to overcome the flow resistance of water-heat-medium system and continuously transfer the heat absorbed by the heat medium water in the flue gas heat exchanger to the medium to be heated. The bypass regulator valve is to regulate the inlet temperature of heat medium water at the flue gas heat exchanger inlet and make sure it is above the flue gas dew point temperature.


Heat medium water flow
Water Heat Medium Air Preheater With Flue Gas Heat Exchanger / Q235B Shell

Process flow of water-heat-medium system
Water Heat Medium Air Preheater With Flue Gas Heat Exchanger / Q235B Shell



Structure & Parameter

Service

Waste heat recovery

Equipment

Non-corrosion water-heat-medium preheater technology

Specification

Integral modularized structure

Components

Flue gas heat exchanger, medium heat exchanger (air preheater, feedwater preheater or other medium preheater), hot water circulation pump, regulator valve

Material

Shell: Q235B
Heat transfer tube bundle: 20#/20G

Fabrication code

Steam boiler safety & technology supervision regulation

Flue gas flowMin.: 5000Nm3/h
Inlet flue gas pressure-5.0-10.0Kpa
Inlet flue gas temperature200-500℃
Outlet flue gas pressure-4.0-9.0Kpa
Outlet flue gas temperature120℃-150℃
Refractory lining

Aluminum silicate fibre felt

External wall temperature of equipment≤60℃
Utility

2-Phase power supply: 10Kw
Water consumption: 0-1 ton

Main measuring points

Inlet flue gas temperature
Waste heat outlet flue gas temperature
Regulator valve opening
Circulation pump opening

Main interlocked alarm

nlet flue gas temperature high

Service life of critical equipment

Design service life: 8 years

Downtime of spare parts

3~4 months

Warranty period

12 months since normal operation or 18 months since delivery to site, whichever comes first

Scope of work/serviceEPC
Response to service request

24hs

Application

Oil refining, chemical and coal chemical industries



Advantage
(1) Flexible and easy arrangement
(2) Wide adaptability to various fuels
(3) Accommodation of load change
(4) Improved operation safety
(5) Common use for multiple adjacent heaters
(6) Extended service life.


Typical Application

No.

Project

Specification

User

Qty.

1

1# & 2# aromatic hydrocarbons hydrogenation cracking heater waste heat recovery system reconstruction

1# Flue gas flow:11280kg/h
2# Flue gas flow:55757kg/h

Sinopec Shanghai company

2 sets

2

1,200,000T/year catalytic plant waste heat recovery

Q179/505-10/79.2-3.82/348

Shandong Dongming Petrochemical Group
Jiangsu Xinhai Petrochemical Company

1 unit

3

2,800,000T/year heavy oil catalytic CO waste heat recovery reconstruction

BQ211/800-42/135-3.82/450

Sinopec Hainan company

2 units

4

1,800,000T/year catalytic plant waste heat boiler

BQC235/900-142-3.82/420

CNPC Fushun company

1 unit

5

1,800,000T/year catalytic plant waste heat recovery reconstruction

Q310/540-230-3.82/380

Yanchang Group Yulin Refining & Chemicals Co. Ltd.

2 units
















































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