CN209945062U - A Harmon-type indirect air-cooled cold-proof and freeze-proof system - Google Patents

Abstract

The utility model discloses a Harmon-type indirect air-cooling cold-proof and anti-freezing system, which comprises a Rankine cycle system and an intercooling tower system. The Harmon-type indirect air-cooling cold-proof and freeze-proof system is connected by pipes, and the Rankine cycle system and the intercooler are connected by pipes. The connections between the tower systems are all pipeline connections, and the pumps and components in the Rankine system are also connected by pipelines. Compared with the prior art, the advantages of the present utility model are: the application of the Harmon-type indirect air-cooling cold-proof and freeze-proof system can easily solve the above difficult problems, and the system can be evaluated in terms of engineering cost, its anti-freezing effect, energy saving and consumption reduction. It is an effective technological transformation.

Description

A Harmon-type indirect air-cooled cold-proof and freeze-proof system

technical field

The utility model relates to the field of anti-freezing, in particular to a Harmon-type indirect air-cooling cold and anti-freezing system.

Background technique

Harmon-type intercooling air-cooling units have been widely installed in water-deficient areas in northwest my country, especially in Wucaiwan. The ambient temperature in the northwest region in winter can reach -42°C. The suction of the cooling triangle caused by the negative pressure of the cooling tower causes the ambient temperature of the cooling triangle to be at least -5°C lower, and the cold and frost protection of the indirect air-cooled unit appears to be inadequate. The output reduction and non-stop of units due to the freezing and cracking of the inter-cooled triangle have gradually increased this year. In-depth research on the antifreeze technology of the heat exchange surface of the tube bundle of the Harmon-type indirect air-cooled unit system is particularly urgent and important.

Utility model content

The technical problem to be solved by the utility model is to provide an effective Harmon-type indirect air-cooled cold-proof and freeze-proof system aiming at the above problems.

In order to solve the above-mentioned technical problems, the technical scheme provided by the present utility model is: a Harmon-type indirect air-cooling cold-proof and anti-freezing system, including a Rankine cycle system and an inter-cooling tower system, and the Harmon-type indirect air-cooling cold-proof and anti-freezing system adopts pipes to The connection between the system of the Rankine cycle and the system of the intercooling tower is all pipeline connection, and the pump and the components in the Rankine system are also connected by pipelines. The Rankine cycle system includes a boiler, and the boiler A superheater is connected to the superheater, a steam turbine is connected to the superheater, a generator is connected to the steam turbine, a surface condenser is also connected to the steam turbine, and a condensate pump is connected to the surface condenser, The condensate pump is connected with a condensate booster, the condensate booster is connected with a low-pressure heater, the low-pressure heater is connected with a deaerator, and the deaerator is connected with a junction. A water pump, a high-pressure heater is connected to the junction water pump, the high-pressure heater is connected to a boiler, a water pump is connected to the surface condenser, an intercooling tower is connected to the water pump, and the bottom of the intercooling tower is connected The connection has a water tank.

Compared with the prior art, the advantages of the present utility model are: the application of the Harmon-type indirect air-cooling cold-proof and freeze-proof system can solve the above difficult problems, and the system can be evaluated in terms of engineering cost, its anti-freezing effect, energy saving and consumption reduction. It is an effective technological transformation.

As an improvement, the intermediate cooling tower is composed of cooling triangles, there is a gap between the cooling triangle and the tower wall of the intermediate cooling tower, and finned tubes are connected to the cooling triangles, and the heating on the finned tubes The position of the cooler corresponds to the sub-delta unit of the cooling triangle, and the height is the same as that of the sub-delta unit. The top of the cooling triangle is provided with a steam supply loop, and the outflow end of the steam supply loop is provided with a plurality of branch pipes. The number of branch pipes The number of cooling triangular sectors is the same as that of the indirect cooling tower. The outflow end of each branch pipeline is correspondingly connected to a plurality of pipelines arranged at the cooling triangular sector. part, each connecting part is connected to the hydrophobic ring tube.

As an improvement, the steam supply ring pipe of the cooling triangle has an opening corresponding to the position of the sub-delta unit, the opening is connected to the finned tube by a stainless steel metal hose, and a manual valve is installed on the inlet of the cooling triangle.

As an improvement, the finned tube is fixed by a triangular inner bracket, and the finned heat exchanger of a single cooling triangle can be isolated and thrown back independently, which is flexible and reliable.

As an improvement, the backwater section of the finned tube is connected to the hydrophobic ring pipe with a stainless steel metal hose, and a valve is installed on the backwater section.

As an improvement, a skylight is connected to the top of the cooling triangle, a skylight bracket is connected to the skylight, and the skylight bracket is connected to the cooling triangle.

Description of drawings

Figure 1 is a schematic diagram of the structure of the Rankine cycle system of a Harmon-type indirect air-cooled cold-proof and freeze-proof system.

Figure 2 is a schematic diagram of the structure of the indirect cooling tower system of a Harmon-type indirect air-cooled cold-proof and anti-freeze system.

Fig. 3 is a diagram showing the use state of the cooling delta.

FIG. 4 is a schematic diagram of the vertical structure of the cooling triangle.

As shown in the picture: 1. Boiler, 2. Superheater, 3. Steam turbine, 4. Generator, 5. Surface condenser, 6. Condensate pump, 7. Condensate booster, 8. Low pressure heater, 9. Deaerator, 10, Junction water pump, 11, High pressure heater, 12, Water pump, 13, Intercooling tower, 14, Water tank, 15, Drain box, 16, Cooling triangle, 17, Steam supply loop, 18, Hydrophobic ring tube, 19, finned tube, 20, skylight.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings.

When the present utility model is specifically implemented, a Harmon-type indirect air-cooled cold-proof and freeze-proof system includes a boiler 1, a superheater 2 is connected to the boiler 1, a steam turbine 3 is connected to the superheater 2, and the steam turbine 3 is connected A generator 4 is connected, a surface condenser 5 is also connected to the steam turbine 3, a condensate pump 6 is connected to the surface condenser 5, and a condensate booster is connected to the condensate pump 6 7. A low-pressure heater 8 is connected to the condensate booster 7, a deaerator 8 is connected to the low-pressure heater 8, and a condensate pump 10 is connected to the deaerator 9. 10 is connected to a high-pressure heater 11, the high-pressure heater 11 is connected to the boiler 1, the surface condenser 5 is connected to a water pump 12, and the water pump 12 is connected to an intercooling tower 13, the intercooler The bottom of the tower 13 is connected with a water tank 14, and the whole system forms a cycle, which uses the heating and flow of water to prevent freezing, so that the heat circulates in the whole system.

The Harmon-type indirect air-cooled cold-proof and anti-freeze system is connected by pipelines. The connection between the system of the Rankine cycle and the system of the indirect cooling tower are all connected by pipelines, and the pumps in the Rankine system are also connected by pipelines with various components. .

The intermediate cooling tower is composed of cooling triangles, there is a gap between the cooling triangle and the tower wall of the intermediate cooling tower, and finned tubes are connected to the cooling triangles, and the heaters on the finned tubes are located in corresponding positions. In the sub-triangular unit of the cooling triangle, the height is the same as that of the sub-triangular unit. The top of the cooling triangle is provided with a steam supply ring pipe, and the outflow end of the steam supply ring pipe is provided with a plurality of branch pipes. The number of cooling triangle sectors of the tower is the same, the outflow end of each branch pipeline is correspondingly connected with a plurality of pipelines arranged at the cooling triangle sector, the two ends of the pipelines are connected and a plurality of connecting parts of pipelines are arranged on them. Each connecting part is connected to the hydrophobic ring tube.

The steam supply ring pipe of the cooling triangle has an opening corresponding to the position of the sub-delta unit, the opening is connected to the finned tube by a stainless steel metal hose, and a manual valve is installed on the inlet of the cooling triangle.

The finned tube is fixed by a triangular inner bracket, and the finned heat exchanger of a single cooling triangle can be isolated and thrown back independently, which is flexible and reliable.

The backwater section of the finned tube is connected to the hydrophobic ring pipe with a stainless steel metal hose, and a valve is installed on the backwater section.

A skylight is connected to the top of the cooling triangle, and a skylight bracket is connected to the skylight, and the skylight bracket is connected to the cooling triangle.

The working principle of the utility model is that the ambient temperature of the cooling triangular radiator is increased during the operation of the indirect air-cooling unit, which is an effective method for preventing cold and freezing of the indirect cooling. At present, there are two ways to improve the heat exchange effect of the radiator.

Option 1: Radiant heating, install a 20-meter-long copper fin heat pipe vertically in each cooling triangle of the intercooler, pass the exhaust steam and auxiliary steam of the unit into the intercooler triangle, and use the heat of the steam to improve the intercooler. The ambient temperature of the cold triangle can achieve the purpose of inter-cooling and anti-freezing. A regulating valve is installed in the steam pipeline to control the steam intake according to the ambient temperature to ensure the safe operation of the unit. The initial steam is 200 °C and the pressure is 0.4Mpa. 200 meters, the expected working temperature of the finned tube is 120℃, the pressure is 0.3Mpa, and the sector height is ²⁰ meters, which fully meets the requirements. The above is more than enough.

Option 2: Eliminate the negative pressure in the intercooling tower, transform the protective panels at the top of each sector triangle, and change some of the fixed protective panels into skylights that can be freely operated. After opening the skylights, the intercooling tower's pumping force will act. On the skylight, the negative pressure at the cooling triangle is eliminated. After the skylight is opened, there is a 45-degree angle between the skylight and the triangle horizontal guard plate, which can protect the outdoor wind from entering the tower and scouring the triangle heating surface. Vortex, the diameter of the intercooling tower is about 200 meters, the ventilation area is πR ² = 3140 square meters, the area of a single skylight is about 1.2 meters * 15 meters, the ventilation area is πR ² = 230 square meters, the system is equipped with 12 skylights, the total ventilation area It is 2760 square meters, which can completely offset the negative pressure at the cooling triangle. The two schemes need to be used together for better results.

Example:

Example 1: Adding equipment piping system: The system consists of water tank, inlet pipeline, finned tube radiator, valve, outlet pipeline, etc. The steam is passed from the workshop to the intercooling steam supply ring pipe, and the ring pipe enters each pipe. The triangular finned radiator pipe returns the drainage to the drainage tank, and the qualified drainage is directly discharged into the intercooling groundwater tank to achieve recycling, energy saving and consumption reduction. The radiator will be fixed on the bracket in the triangle.

Embodiment 2: The outflow end of the steam outlet pipeline of the steam supply loop is provided with a plurality of branch pipelines. The number of branch pipelines is the same as that of the cooling triangular sector of the indirect cooling tower. A plurality of arc-shaped pipelines in the area are connected correspondingly, two ends of the arc-shaped pipeline are connected, and a plurality of connecting parts of pipelines are arranged on the arc-shaped pipeline, and each connecting part pipe is communicated with the hydrophobic ring pipe.

Example 3: Installing an adjustable top sunroof Installation:

1: Remove the top protective plate of the cooling triangle and make a design drawing for the installation position of the skylight.

2: Do a good job of the skylight frame, and weld the rooting part of the skylight firmly.

3: Install the skylight on the skylight frame. Use a lifting tool to open and close the sunroof once to ensure flexible and reliable switching.

4: Install the opening and closing actuator of the skylight, and install a small hanger on the upper part of the skylight. Since the weight of the skylight is about 0.5 tons, the opening and closing mechanism is completed by a 1-ton inverted chain with the hanger.

5: In summer, loosen the reverse chain, close the skylight, and increase the negative pressure at the triangle to ensure the vacuum of the unit. Open the skylight in winter to eliminate the negative pressure at the triangle and increase the ambient temperature at the triangle.

Implementation effect: benefit

1: There are 120 triangles in an intercooler, and the equipment cost of each triangle is 320,000 yuan. The cost of the intercooler antifreeze system is about 800,000 yuan. The antifreeze reliability is high, and the relative cost is low, which can ensure long-term safe operation of the sector.

2: The steam adopts auxiliary steam and deaerator exhaust steam, the waste steam can be effectively used, and the qualified drainage is directly discharged into the intercooled groundwater tank, so as to save energy and reduce consumption, and is environmentally friendly.

3: After the system is put into use, it can save more than 1 million maintenance costs every year. The effective utilization of exhaust steam and the recovery of water drainage can save about 1,000 tons a year and save about 30,000 yuan in costs.

Effect

1: The negative pressure of the intercooling tower is about 3Kpa. Due to negative pressure suction in winter, the ambient temperature at the intercooling triangle is at least 5°C lower than the normal ambient temperature. The skylight can eliminate this negative pressure and relatively improve the environment at the cooling triangle. temperature 5°C.

2: The radiant heating device ensures that the cooling surface temperature of the sector is higher than -10 degrees Celsius after the shutter of the sector is closed to ensure that the sector does not freeze.

The present invention and the embodiments thereof have been described above, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, and without creatively designing the structural modes and embodiments similar to the technical scheme, all should belong to the protection of the present invention. scope.

Claims (6)

1. a Harmon-type indirect air-cooling cold-proof and anti-freezing system, is characterized in that: comprise a Rankine cycle system and an intercooling tower system, and the Harmon-type indirect air-cooling cold-proof and anti-freezing system adopts a pipeline to be connected, and the system of the Rankine cycle and the intercooler are connected. The connections between the systems of the cooling tower are all pipeline connections, and the pumps and components in the Rankine system are also connected by pipelines. The Rankine cycle system includes a boiler (1), and the boiler (1) is connected with a superheater (2), a steam turbine (3) is connected to the superheater (2), a generator (4) is connected to the steam turbine (3), and a surface condensing steam is also connected to the steam turbine (3) A condensate pump (6) is connected to the surface condenser (5), and a condensate booster (7) is connected to the condensate pump (6), and the condensate is boosted A low pressure heater (8) is connected to the device (7), a deaerator (9) is connected to the low pressure heater (8), and a junction water pump (10) is connected to the deaerator (9), A high-pressure heater (11) is connected to the condensing water pump (10), the high-pressure heater (11) is connected to the boiler (1), and the surface condenser (5) is connected to a water pump (12), so An intermediate cooling tower (13) is connected to the water pump (12), and a water tank (14) is connected to the bottom of the intermediate cooling tower (13). 2. A Harmon-type indirect air-cooled cold-proof and anti-freeze system according to claim 1, wherein the intermediate cooling tower is formed by combining a cooling triangle, and there is a spacing between the cooling triangle and the wall of the intermediate cooling tower , the cooling triangle is connected with a finned tube, the position of the heater on the finned tube corresponds to the sub-delta unit of the cooling triangle, the height is the same as the sub-delta unit, and the top of the cooling triangle is provided with a steam supply loop , the outflow end of the steam supply loop is provided with a plurality of branch pipes, the number of branch pipes is the same as that of the cooling triangular sector of the indirect cooling tower, and the outflow end of each branch pipe is the same as the number of the branch pipes arranged at the cooling triangular sector. The pipelines are connected correspondingly, the two ends of the pipelines are communicated, and a plurality of connecting parts of the pipelines are arranged on the pipelines, and each connecting part is connected to the hydrophobic ring pipe. 3. A Harmon-type indirect air-cooled cold-proof and freeze-proof system according to claim 2, characterized in that: the steam supply loop of the cooling delta corresponds to an opening at the position of the sub-delta unit, and the opening is connected to a stainless steel metal hose. For finned tubes, a manual valve is installed on the cooling triangular inlet. 4. A Harmon-type indirect air-cooled cold-proof and freeze-proof system according to claim 3, wherein the finned tube is fixed by a triangular inner bracket. 5. A Harmon-type indirect air-cooled cold-proof and freeze-proof system according to claim 3, characterized in that: the return section of the finned tube is connected to the drainage ring pipe with a stainless steel metal hose, and the return section is installed on the There are valves. 6. A Harmon-type indirect air-cooled cold-proof and freeze-proof system according to claim 2, wherein the top of the cooling triangle is connected with a skylight, the skylight is connected with a skylight bracket, and the skylight bracket is connected at the On the cooling triangle.

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