Steam condensate recovery device

Abstract

A steam condensate water recovery device relates to the field of recovery equipment in fine chemical industry production and comprises a condensate water collection tank, a condensate water storage tank, a temperature reduction water pump and the like, an inlet in the right side of the upper end of the condensate water collection tank is connected with an overflow port of the condensate water storage tank through a pipeline, and an outlet in the lower side of the condensate water collection tank is connected with a first condensate water delivery pump through a pipeline. A liquid level meter is installed on the side face of the condensate water collecting tank and connected with a second condensate water conveying pump, the first condensate water conveying pump is connected with the condensate water storage tank through a pipeline, the condensate water collecting tank is connected with an air cooler through the first condensate water conveying pump and the second condensate water conveying pump, and the air cooler is connected with a circulating water system through a pipeline. The process is simple, convenient to operate and easy to control; the steam condensate water is reutilized and can be directly used by the boiler, energy consumed by water heating of the gas-fired boiler is reduced, waste heat of the steam condensate water is reutilized as much as possible, the steam condensate water is used as desuperheating water, heat loss of steam is reduced, and a large amount of industrial water is saved.

Description

Technical Field

[0001] This utility model relates to the field of recycling equipment in fine chemical production. In particular, it relates to a steam condensate recovery device. Background Technology

[0002] In many industrial production processes, high-temperature steam is used. When the terminal equipment cannot fully utilize this steam, it is directly released. The steam cooling water is very hot and contains a large amount of heat, resulting in significant waste of energy and water resources. To achieve energy conservation, emission reduction, and cost reduction, it is necessary to upgrade and transform the condensate recovery system. To fully utilize steam condensate and its heat, this steam condensate recovery and reuse process device has been invented and designed.

[0003] Utility model patent ZL202322211206.6 discloses a steam condensate recovery device. The outlet of a water pump is connected to a first valve body. The first valve body is sequentially connected via pipelines to an insulated water tank, a boiler, process consumable equipment, and a steam trap. A recovery port is provided on the upper side wall of the recovery storage tank. The steam trap is connected to the recovery port of the recovery storage tank via a recovery pipeline. A connecting port is provided on the side wall near the bottom of the recovery storage tank. The connecting port is connected to the water inlet on the upper side wall of a buffer tank. A water inlet is provided on the side wall near the bottom of the flushing tank; the water inlet is connected to the water pump inlet through a pipeline; a return air port is provided on the top of the recovery storage tank; an exhaust port is provided on the top of the pressure eliminator; the return air port is connected to the exhaust port through a pipeline; the exhaust port is connected to the first valve body through a pipeline; this utility model can provide a steam condensate recovery device with reasonable structural design, system circulation recovery design and high recovery efficiency, but this patent does not consider the problem that the waste heat of the steam condensate can be reused. Utility Model Content

[0004] The purpose of this invention is to provide a steam condensate recovery device to solve the problem of steam condensate recovery and its inefficient utilization.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A steam condensate recovery device includes: a condensate collection tank 1, a condensate storage tank 6, a desuperheating pump 3, a flow meter 4, a regulating valve 5, an air cooler 6, a condensate transfer pump 9, and a level gauge 13. A main steam condensate pipe is connected to the left inlet at the upper end of the condensate collection tank 1. The left outlet of the condensate collection tank 1 is connected to the inlet of the desuperheating and pressure reducing device 2 via a pipe. The desuperheating pump 3, the flow meter 4, and the regulating valve 5 are installed on the connected pipe. The right inlet at the upper end of the condensate collection tank 1 is connected to the overflow port of the condensate storage tank 6 via a pipe. The lower outlet of the condensate collection tank 1 is connected to the first condensate transfer pump 9 via a pipe. A level gauge 13 is installed on the side of the condensate collection tank 1 and is connected to a second condensate transfer pump 10. The first condensate transfer pump 9 is connected to the condensate storage tank 6 via a pipe. The condensate collection tank 1 is connected to the air cooler 7 via the first condensate transfer pump 9 and the second condensate transfer pump 10. The air cooler 7 is connected to a circulating water system 14 via a pipe.

[0007] The condensate collection tank 1 is connected to the heating water supply via the first condensate delivery pump 9 and the second condensate delivery pump 10.

[0008] The condensate storage tank 6 is connected to the gas boiler 8 via a pipeline, and a boiler water pump 11 is installed on the pipeline.

[0009] The advantages of this invention are: simple process, convenient operation, and easy control; the secondary use of steam condensate allows for direct boiler use, reducing energy consumption for heating water in gas-fired boilers, maximizing the reuse of waste heat from steam condensate, and using steam condensate as desuperheating water reduces heat loss from steam, saving a significant amount of industrial water. Using an air cooler to cool the condensate, the residual condensate used as makeup water for circulating water experiences significant cooling, and further cooling via a cooling tower fully meets the temperature standards for the entire plant's circulating water system. Directly replenishing the water lost during circulating water cooling reduces the consumption of industrial water and gas. Using condensate as makeup water for boilers and circulating water systems effectively reduces water treatment chemical dosage, equipment scaling, and production costs. In winter, using steam condensate as makeup water for gas-fired boilers, a comparison of gas consumption before and after the modification shows that natural gas consumption per ton of steam is reduced from 7.5 m³ to 4.5 m³. The rationalized operation of external steam and gas-fired boilers fully utilizes recovered steam condensate and waste heat, effectively reduces industrial water consumption, and minimizes wastewater discharge. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the process flow for this practical application. Detailed Implementation

[0011] The present application will now be clearly and completely described with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0012] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0013] A steam condensate recovery device includes: a condensate collection tank, a condensate storage tank, a water pump, valves, a regulating valve, and an air cooler. All components are connected by pipes. The steam trap pipes at each steam heating point are connected to the condensate collection tank 1. A desuperheating and pressure reducing device 2 is connected to the left side of the condensate collection tank 1 via a pipe. A water pump 3, a flow meter 4, and a regulating valve 5 are installed on the connected pipes. The upper left side of the condensate collection tank 1 is connected to the condensate main pipe, and the right side is connected to the overflow port of the condensate storage tank 6 via a pipe. A first condensate transfer pump 9 is connected to the lower side of the condensate collection tank 1 via a pipe. A second condensate transfer pump 10 is connected to the side of the condensate collection tank 1. The first condensate transfer pump 9 is connected to the condensate storage tank 6 via a pipe. The condensate storage tank 6 is connected to a boiler feed water pump 11 via a pipe. The boiler feed water pump 11 is connected to a gas boiler 8. The first condensate transfer pump 9 and the second condensate transfer pump 10 are connected to an air cooler 7 via pipes. The air cooler 7 is connected to a circulating water system 14 via pipes. The first condensate transfer pump 9 and the second condensate transfer pump 10 are connected to heating water supply via pipes.

[0014] During operation, the condensate in the workshop is collected into condensate collection tank 1 through pipelines. The temperature of the condensate entering the collection tank is not lower than 90℃.

[0015] When the device uses external steam, some of the steam condensate entering the condensate collection tank 1 is regulated by the hot water pump 3, flow meter 4 and regulating valve 5 and enters the desuperheating and pressure reducing device 2 for use as desuperheating water. The remaining steam condensate in the condensate collection tank 1 is sent to the condensate storage tank 6 by the condensate transfer pump 9 for temporary storage. The condensate storage tank 6 is equipped with an overflow port, and excess water overflows back to the condensate collection tank 1.

[0016] The condensate collection tank 1 is equipped with a magnetic level gauge 13. The level gauge 13 and the second condensate transfer pump 10 form a level control system to ensure that the liquid level in the condensate collection tank 1 is between 5% and 85%. After the condensate storage tank 6 overflows, the steam condensate from the condensate collection tank 1 is cooled to about 40°C by the first condensate transfer pump 9, the second condensate transfer pump 10, and the air cooler 7. The steam condensate is then sent to the return water pipeline of the circulating water system 14, enters the circulating water system, and then passes through the cooling tower of the external circulating water system to ensure the operating temperature of the circulating water. Excess condensate is discharged through the drain outlet of the circulating water system, ensuring that the drainage temperature meets the standard.

[0017] In winter, the steam condensate in the condensate collection tank 1 is connected to the heating water supply system through the first condensate delivery pump 9 and the second condensate delivery pump 10 via pipelines. The steam condensate directly enters the heating system and then enters the circulating water system through the return water of the heating system, so as to achieve the purpose of utilizing waste heat for heating and cooling the circulating water supply.

[0018] When using a gas-fired boiler, the steam condensate in condensate storage tank 6 is pumped to gas-fired boiler 8 via boiler hot water pump 11, ensuring that the inlet pressure of the high-temperature water softening system of gas-fired boiler 8 is not lower than 0.2 MPa and the inlet temperature is not lower than 80℃. After the liquid level in condensate storage tank 6 drops, the steam condensate in condensate collection tank 1 is pumped back into condensate storage tank 6 via condensate transfer pump 9, ensuring water supply for the gas-fired boiler. Insufficient water supply from the gas-fired boiler is supplemented by industrial water.

[0019] In winter, when heating is provided by a gas-fired boiler, the recovered condensate is only used to replenish the heating system.

Claims

1. A steam condensate recovery device, comprising: The system comprises a condensate collection tank (1), a condensate storage tank (6), a desuperheating pump (3), a flow meter (4), a regulating valve (5), an air cooler (7), a first condensate delivery pump (9), and a level gauge (13). Its features include: a steam condensate main pipe connected to the left inlet at the upper end of the condensate collection tank (1); a left outlet of the condensate collection tank (1) connected to the inlet of the desuperheating and pressure reducing device (2) via a pipe; and a desuperheating pump (3), a flow meter (4), and a regulating valve (5) installed on the connected pipe. The upper right inlet is connected to the overflow port of the condensate storage tank (6) through a pipe. The lower outlet of the condensate collection tank (1) is connected to the first condensate transfer pump (9) through a pipe. A level gauge (13) is installed on the side of the condensate collection tank (1). The level gauge (13) is connected to the second condensate transfer pump (10). The first condensate transfer pump (9) is connected to the condensate storage tank (6) through a pipe. The condensate collection tank (1) is connected to the air cooler (7) through the first condensate transfer pump (9) and the second condensate transfer pump (10). The air cooler (7) is connected to the circulating water system (14) through a pipe.

2. A steam condensate recovery device according to claim 1, characterized in that: The condensate collection tank (1) is connected to the heating water supply via the first condensate delivery pump (9) and the second condensate delivery pump (10).

3. A steam condensate recovery device according to claim 1, characterized in that: The condensate storage tank (6) is connected to the gas boiler (8) via a pipeline, and a boiler water pump (11) is installed on the pipeline.

4. The steam condensate recovery device according to claim 1, characterized in that: Entering the condensate collection tank (1) The temperature of the steam condensate in the steam condensate shall not be lower than 90℃.

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