Taggraphite heat exchanger

Tubular graphite half-water gas cooler (3)

1, graphite heat exchanger in the gas cooling operation
We tried to apply graphite tube heat exchanger to semi-water gas cooling. All week
Know that in the hot summer, a substantial reduction in ammonia production, ammonia production has a serious negative impact. To lessen this impact, we utilize a factory-wide shut-down and maintenance machine with a graphite tube gas cooler in front of the compressor. Its main purpose is to reduce the gas temperature, increase the compressor effective air delivery, and ultimately increase the production of synthetic ammonia.

2, the focus of the cooler installation and key mechanisms
(1) The thermal conductivity of graphite material is good, the thermal conductivity is 2.5 times of that of carbon steel, the graphite material tube is used to strengthen the heat exchange, and the selected heat transfer area is 700m2.
(2) Taking into account the average summer gas temperature of 46 ℃, so the use of a lower temperature water (temperature is about 27 ℃) for gas cooling and heat exchange, and the export of a water recharge cycle use.
(3) Although the thermal conductivity of graphite is good, the convective heat transfer coefficient of cold-side fluid and hot-side fluid greatly affects the heat transfer effect. Therefore, countercurrent heat exchange is used and the number of water side baffles is increased to enhance the convective heat transfer.
(4) In the cooler at the bottom of the gas-water separation device, which can effectively prevent the gas into the compressor with water.

3, cooler operation evaluation related parameter records
a, gas temperature before cooling: an average of 39.2 ℃
b, after cooling gas temperature: an average of 31.4 ℃
c, the average daily water consumption: 500m3
d, gas pressure drop: 500Pa

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Tubular graphite half-water gas cooler (2)

Tubular graphite half-water gas cooler (2)

3, product application analysis:
In the ammonia production process, always accompanied by the occurrence of heat exchange. The pros and cons of this type graphite heat exchanger performance directly determines whether the ammonia synthesis system can operate economically. It is based on this, new materials, high-performance heat exchanger technology is also gradually penetrated to the industrial production of ammonia, and increasingly show its tremendous role.
Due to various reasons, many of our small nitrogen fertilizer companies, the traditional heat transfer technology is still dominant. It is an obstacle to the production of synthetic ammonia based on energy conservation and consumption reduction. At present, some manufacturers also try to use a mixed spray and spray-based heat exchanger, such heat exchangers exist a series of problems such as high power consumption, the loss of effective gas composition, gas and water separation difficulties. After careful comparison, research and demonstration, our company boldly tried to apply the new graphite tube heat exchanger to the production system and achieved good results.

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Tubular graphite half-water gas cooler (1)

Tubular graphite half-water gas cooler (1)

1, the structural features: This graphite heat exchanger is my company for the ammonia industry to compress a period of semi-water gas cooling section design. Equipment cylinder and head with carbon steel corrosion, carbon steel tube plate, heat pipe modified phenolic resin-type graphite tube, pipe and tube plate using my company’s patented composite structure, single tube seal, reliable performance, Easy maintenance. Heat exchange tube model: φ30 / φ20, φ32 / φ22, φ37 / φ25.

2, the design parameters: Design pressure: 0.6 MPa
Design temperature: -20 ~ 165 ℃
Heat transfer area: 10 ~ 3000 ㎡

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Patented combination of tubular graphite heat exchanger (2)

Patented combination of tubular graphite heat exchanger (2)

3, product description:
1, The equipment adopts the patented technology of our company, the tube and the tube plate are connected as elastic seal, the graphite tube is flexible and retractable under temperature difference stress, which effectively avoids the stress destruction caused by the temperature difference stress between the graphite tube and the tube plate bonding structure;
2, the equipment can be replaced by a single tube, interchangeability of parts, maintenance and cleaning convenience;
3, the value in the table calculated in accordance with φ32 / 22 graphite tube diameter;
4, the company based on the customer request for the design and manufacture of 450 ㎡ above the heat exchanger;
5, I type for the ordinary heat exchanger, II type condenser with gas-liquid separator.
6, the device can be used as a condenser, cooler, heater, falling film absorber, reboiler and so on.

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Patented combination of tubular graphite heat exchanger (1)

Patented combination of tubular graphite heat exchanger (1)

1, the structural features:
This product is a patented product independently developed by our company. Equipment cylinder and head with carbon steel corrosion, tube board impregnated graphite, heat exchange tubes for the modified phenolic resin-type graphite tube, tube and tube plate between the company’s flexible seal composite structure, single-tube seal, reliable performance Easy to maintain.
Heat exchange tube model: φ30 / φ20, φ32 / φ22, φ37 / φ25, φ50 / φ36.

2, the design parameters: Design pressure: 1.0 MPa
Design temperature: -20 ~ 165 ℃
Heat transfer area: 10 ~ 1500 ㎡

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Our main production equipments of Graphite Heat Exchanger

Our main production equipments of Graphite Heat Exchanger as follows:

1, CNC drilling machine special: 5 units.

2, CNC vertical lathe: 3 units.

3, manual dedicated drilling machine: 3 units.

4,3050 Rocker drill: 3 sets.

5,20 Lathe: 2 sets.

6,30 lathe: 1 Taiwan.

7, ordinary car: 1 Taiwan.

8, NC dedicated car graphite tube lathe: 1 Taiwan.

9, phenolic resin production system: 2 sets.

10, resin impregnation system: 3 sets.

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Our Graphite Heat Exchanger patent

Our Graphite Heat Exchanger products in December 1999 has repeatedly been the State Intellectual Property Agency granted the national patent products, and in the first China Quality and Brand-name Products Expo won the first Expo gold medal; hosted by the Ministry of Chemical Industry Second National Anti-Corrosion Products Fair Won the gold medal; and made Chemical Fertilizer Division Department of fertilizer phosphate sulfuric acid industry equipment service network industry equipment manufacturing construction and installation, professional products supply qualification certificate. The company produced a combination of tubular graphite heat exchanger for the domestic initiative to achieve a single tube can be replaced at the same time, the allowable pressure to 1.0MPa, a single heat transfer area reached more than 2000 square meters, greatly expanded the use of the field, is considered to be Tubular graphite heat exchanger technology revolution; the company invested in research and development in 2009, a new round hole graphite heat exchanger, modified resin impregnated graphite and new processing technology, allowing the pressure to 0.8MPa, broaden the Graphite heat exchanger in the field of use.

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Our team

Qingdao Rares Graphite Co., Ltd. currently employs 65 people, including two senior engineers, engineers eight people, with more than 10 years of experience in the technical workers 42 people, is China’s graphite heat exchanger chemical equipment professional manufacturer, is China Chemical Industry Equipment Corporation designated sentinel manufacturers. Strong technical force, and Qingdao University of Science and Technology, China University of Petroleum (East China) and other well-known domestic institutions to develop new technologies and new fields, new areas in the graphite industry has always been in the leading position in the development of products. Company’s products in December 1999 so far has been repeatedly granted the State Intellectual Property Products National Patent Products

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Our Graphite Heat Exchanger

Qingdao Rares Graphite Co., Ltd. is a graphite heat exchanger, graphite falling film absorber and graphite tower equipment and other graphite equipment manufacturers, with A4 non-metallic pressure vessels (graphite only) design permits and manufacturing permits Certificate of professional manufacturing enterprises. The company is located in the beautiful coastal city of Qingdao, Qingdao Liuting International Airport from 50 kilometers, near the 209 provincial highway, 204 National Highway, Qingrong Expressway, Qinglong Expressway, Tongsan high-speed traffic thoroughfares, transportation is very convenient. Founded in 1999, has now developed into a large domestic professional manufacturer of graphite equipment, sales in 2008 among the best in the country.

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