Basic Info.
After-sales Service
Support for Home Visits
Performance
Pressure Resistant, Temperature Resistant, Corrosion Resistant
Transport Package
Sea Freight
Origin
Lianyungang, Jiangsu, China
Product Description
Waste heat recovery unit with continuous discharge for industrial boilers
Product Description
High-efficiency continuous exhaust waste heat recovery device
Utility model patent: ∶zL 20142043463.4
One.summary
Industrial boilers and power station boilers with a capacity of more than six tons are equipped with continuous blowdown systems. Usually, the discharge rate of industrial boilers is between 79% and 10%, and that of utility boilers is between 1% and 3%. The discharged sewage is saturated and contains a lot of heat energy. For example, the temperature of the discharged sewage of a medium-temperature and medium-pressure boiler (4Mpa) is 250ºC and its enthalpy is as high as 259.7Kg.
The common continuous flash tank can recover part of heat energy and working medium by flash evaporation, but the continuous flash tank can't cool the sewage below 100ºC (usually 105-10ºC), so the recovered heat is very limited.
Some even directly discharge the flash steam into the atmosphere, and the energy loss is serious. Moreover, the continuous expansion vessel is tall and bulky, Complex system with high failure rate. The new high-efficiency waste heat recovery device produced by our company directly recovers the heat of continuous sewage discharge through heat exchange.
For industrial casting furnaces, make-up water can be used to cool the sewage; for power station boilers, in addition to make-up water, turbine condensate can also be used to cool the sewage.
Two.Product structure and working principle
According to the specific situation of the power plant, our company has two sets of design schemes.
In the first scheme:flash steam is used to heat the cooling water. The waste heat recovery device is characterized by high heat exchange efficiency, good energy saving effect, stable operation, heat recovery rate up to 99%, and complete elimination of sewage noise. The waste heat recovery device is provided with a vertical cylinder, upper and lower heads are respectively arranged at the upper and lower parts of the cylinder. Fluorine discharge ports, cooling water Inlet, level gauge interface and drain outlet, etc. are respectively arranged on the cylinder.
The cylinder is internally provided with a first-stage heat exchanger "high-efficiency swirl atomizing nozzle group" and a water inlet chamber, the lower end of which is an atomizing heat exchange space; the lower end of the atomizing heat exchange space is provided with a second-stage heat exchanger "steam-water split silencing device"; the lower end of the steam-water split silencing device is provided with a third-stage heat exchange device "regular heat exchange screen device"; and the lower end of the third-stage heat exchange device is provided with an exhaust interface "distributor".Scheme 2: The boiler continuously discharges sewage to drain water and directly enters the waste heat recovery device. Because the cooling water temperature is normal temperature or slightly higher than normal temperature, the sewage can be cooled to a lower temperature. Recover most (70%-90%) of the heat loss from sewage discharge. Because of the novel heat exchange method, the product has the advantages of large heat exchange coefficient, compact structure, regular shape, convenient installation, reliable operation, good water quality after recycling, and being able to replace continuous expansion vessels.
Three.Model description .
Model example: JSLG-40, which means the continuous exhaust waste heat recovery device with 40 boiler evaporation capacity produced by Lianyungang Jiusheng Company.
Four.Installation and Connection
1.Installation
This product is light in weight, so it is generally unnecessary to consider the bearing capacity of the ground when it is installed on the zero-meter floor. When installed in the boiler operation layer or oxygen removal layer, the place with strong bearing capacity should be selected, and the bearing capacity of the ground should be checked when necessary. The center of gravity of this product is low, so it can be installed by matching the corresponding fixing bolts according to the bottom anchor holes.
2.Connection According to users' needs, a continuous waste heat recovery device can be combined with one or more boilers. The continuous blowdown water from the boiler goes to the blowdown inlet valve through the connecting pipe, and after heat exchange in the waste heat recovery device, it is discharged from the blowdown outlet valve through the flow limiter.
If the waste heat recovery device is installed in the boiler operation layer or oxygen removal layer, a water tank should also be installed behind the sewage outlet valve, so as to avoid the evaporation of sewage due to siphon effect. There is no special requirement for the water tank. It is only necessary to ensure that the discharged sewage does not splash out during operation. The flow limiter mainly prevents the waste water from vaporizing in the waste heat recovery device or causing danger due to misoperation or failure of the inlet and outlet valves of the waste water.
In addition, the system should also have a cooling water bypass valve to ensure the smooth flow of make-up water or condensed water when the waste heat recovery device needs maintenance or inspection.
V.Debugging, operation and withdrawl
After the waste heat recovery device is installed and connected with the system, it can be debugged.
1. Open the cooling water bypass valve and check whether the cooling water is unblocked.
2. Open the cooling water inlet valve and check the tightness of the cooling water side.
3. Open the cooling water outlet valve, slowly close the cooling water bypass valve, and check whether the cooling water is smooth.
4. Slowly open the sewage inlet valve (if multiple boilers share one waste heat recovery device with fixed discharge, it can be opened in turn), and check whether there is any leakage, abnormal noise or vibration at the welding joint.
5. Slowly open the sewage outlet valve and gradually adjust to the required flow rate.
6. Note that you must first open (fully open) the sewage inlet valve, and adjust the sewage flow rate with the outlet valve. Otherwise, the sewage may be vaporized due to sudden pressure drop, causing equipment vibration and even water attack.
7. When the waste heat recovery unit is handed over because of maintenance and inspection, it should first close the sewage outlet valve, then close the sewage inlet valve, open the cooling water bypass valve, and then close the cooling water inlet and outlet valve.
Six.ordering instructions
Users should provide the following data when ordering:
1.Order quantity
2. Connection mode (single connection or common connection)
3. Boiler capacity and related parameters
4.Technical parameters of continuous expansion vessel
Specification Cmm of drain pipe Working pressure: Mpa working temperatureºC Volume m Exhaust Pipe Diameter mm
Product Parameters
Specification sheet for waste heat recovery unit tube exchange.
| No. | Tube O.D. (mm) | Wall thickness (mm) | Range of distances (mm) |
|
| 1 | φ12 | 1.0~2.0 | 40~500 |
| 2 | φ14 | 1.0~2.0 | 40~500 |
| 3 | φ16 | 0.9~2.5 | 60~718 |
| 4 | φ19 | 1.0~2.5 | 70~480 |
| 5 | φ20 | 1.0~2.5 | 80~470 |
| 6 | φ22 | 1.2~2.5 | 80~526 |
| 7 | φ25 | 1.5~2.5 | 80~634 |
| 8 | φ27 | 1.5~2.5 | 100~400 |
| 9 | φ32 | 2.0~3.0 | 150~320 |
The above is a common specification for waste heat recovery devices for tube and core U-tubes for reference only, subject to the actual required parameters.
FAQ
Common faults and treatment
1.The waste heat recovery device vibrates or has water attack.
A.Check whether there is blockage or insufficient opening of the primary valve and sewage inlet valve of the boiler, and if so, eliminate it.
B. Check whether the opening of the sewage outlet valve is too large, and whether the sewage flow rate is too large. If so, try to turn down the sewage outlet valve to reduce the discharge amount.
C. Check whether the cooling water is unobstructed, whether the cooling water bypass valve is opened by mistake, and whether the cooling water quantity is enough. If the cooling water quantity is insufficient, open the cooling water inlet and outlet valve and close the mistakenly opened bypass valve.
2. The amount of sewage is insufficient. Check whether the flow restrictor is plugged or not, if so, remove it and clean it.
3. Packing leakage at cooling water side. Open the packing side shell and properly press the gland nut. When the high-efficiency waste heat recovery device runs for too long (more than 10 years), part or all of the packing can be replaced.
4. Leakage on the high voltage side. The sewage heat exchange side of this product (that is, part of the high-pressure pipe inside the outer pipe) is made of seamless thick-walled pipe, and there is no welded joint in the middle, so it can be used normally, and generally no leakage will occur. If it is found that the conductivity of boiler feedwater increases, open the front and back sampling needle valves to test the conductivity.
Detailed Photos
Company Profile
Lianyungang Jiusheng Electric Power Auxiliary Machinery Co., Ltd.
a national high-tech enterprise, is located at the foot of Jinping Mountain and beside the Qiangwei River. The factory is located in Lianyungang City, Jiangsu Province, the intersection of the the Belt and Road, and the east bridgehead of the Eurasian Continental Bridge.
It is adjacent to the 5A scenic spot of Huaguo Mountain and Liu Zhizhou Sports Park.
It is 5 kilometers away from the entrance and exit of the expressway, 13 kilometers away from the airport, and 36 kilometers away from the port.
It has convenient transportation by land, sea and air.
The company was founded in 2012 with a registered capital of 51 million yuan and an area of 20,000 square meters. It has 6 standardized industrial plants, supporting office areas, living quarters and finished goods yards, with a building area of about 11,000 square meters.
Our Advantages
Jiusheng Company has honed a sword for ten years, casting the soul of the enterprise with the spirit of craftsman.
Under the careful creation of Chairman Xie Qizhi, it has grown into a well-known enterprise in the domestic power auxiliary machinery industry.
It integrates the design, production and sales of electric auxiliary machinery, pressure vessels, chemical equipment and pipeline engineering installation services.
It has the qualification of designing & manufacturing
D1 and D2 level pressure vessel , and the qualificaton of GB2 and GC2 pipeline engineering installation.
It passedISO9001 international quality system,ISO14001 environmental health management system, ISO45001 occupational health management system certification in the industry, and also owns Madrid international trademark and product import and export qualification.
It has certain manufacturing experience in American standard and European standard pressure vessels and other products and has been recognized as a qualified supplier by more than 10 central enterprises in the industry, including CNNC, Sinopec, PetroChina, Huadian, Huaneng, China Resources, China Railway, China Energy Construction, China Power Construction, Guoneng, Everbright, etc.
Address:
No. 18, Xinba Middle Road, Industrial Park, Jinping Town, Lianyungang, Jiangsu, China
Business Type:
Manufacturer/Factory
Business Range:
Chemicals, Industrial Equipment & Components, Instruments & Meters, Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy
Management System Certification:
ISO 9001, ISO 14001
Company Introduction:
The company was established in 2012 with a registered capital of 51 million yuan and covers an area of 25 acres. It has 6 standardized industrial plants and supporting office areas, living areas and finished goods yard, with a construction area of about 10, 000 square meters. Jiusheng company has been sharpening a sword in ten years, casting the soul of the enterprise with the spirit of craftsmanship. Under the careful construction of the chairman Mr. Xie Qizhi, it has grown into a power auxiliary equipment enterprise in Gangcheng. She integrates the design, production and sales of power auxiliary equipment, pressure vessels, chemical equipment and pipeline engineering installation services. It is the chairman unit of Lianyungang Power Auxiliary Equipment Industry Association. Has the design and manufacture of D1, D2 pressure vessels, GB2, GC2 pipeline engineering installation qualifications, passed the ISO9001 quality system certification and ISO14001 environmental health management system certification, ISO45001 occupational health management system certification in the industry, by China National Nuclear Corporation, Sinopec, PetroChina, Huadian, Huaneng, China Resources, China Railway, China Energy Construction, China Power Construction, National Energy, Everbright and other more than 10 central enterprises in the industry were recognized as qualified suppliers, and the company was listed in the Jiangsu Equity Exchange Center in 2018.
Since its establishment, the company has successfully developed new structures such as "special muffler for nuclear power units", "composite steam muffler", "multi-pipe fan muffler", "self-cleaning industrial water filter", "magnetic filter", "Air filter", "Low-consumption high-efficiency water jet air extractor", "Energy-saving deaerator", "High-efficiency waste heat recovery device", "Tubular oil cooler", "Intelligent rubber ball cleaning device", "Fully automatic" More than 20 series and hundreds of specifications of electric power environmental protection and energy saving equipment such as "dosing device". The company has been committed to technological innovation and product research and development, and has obtained nearly 40 product patents, including 4 invention patents. A variety of products have been recognized as national high-tech products, such as "deaerator exhaust steam waste heat recovery device", "water jet air extractor", "silencer", "water filter" and so on. The company has perfect production inspection standards, and all new products have passed the quality inspection of "Jiangsu Provincial Product Quality Inspection and Supervision Center"
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