Condensed water conveying system

Abstract

The utility model belongs to the technical field of steam condensed water recovery of industrial devices, and particularly relates to a condensed water conveying system which is characterized by comprising a water collecting tank and a water conveying tank, a circulating cooling coil is arranged at the top in the water collecting tank, the bottom of the water collecting tank is communicated with the bottom of the water conveying tank through a communicating pipe, and the top of the water conveying tank is connected with a power steam pipe. The bottom of the water conveying tank is connected with a condensate water discharging pipe; the tops of the water collecting tank and the water conveying tank are communicated through a balance pipe, a throttling orifice plate is arranged on the balance pipe, and the middle section of the side wall of the water collecting tank is connected with a plurality of steam condensate pipes; the pressure regulating valve and the pressure recording control instrument are in interlocking control; a liquid level recording control instrument is arranged in the water conveying tank, and the first electromagnetic valve and the second electromagnetic valve are in interlocking control with the liquid level recording control instrument. The steam recovery device has the advantages that steam is used as a power source, multiple paths of condensed water with different pressure grades can be recovered at the same time, flash steam of the condensed water is not released to the outside, and no noise is generated.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam condensate recovery of industrial devices, and in particular relates to a condensate conveying system. Background Art

[0002] Condensate is the product of steam heating. Industrial steam has different pressure levels, such as 0.4MPa steam, 0.8MPa steam, 1.6MPa steam, etc. Heating mainly uses their latent heat. The condensate produced by heating is separated into steam and liquid through the steam trap. Condensate needs to be recycled and reused. Steam of different pressure levels produces condensate at different pressure levels. For example, 0.4MPa steam will produce 0.4MPa condensate, and 0.8MPa steam will produce 0.8MPa condensate. Therefore, different recovery mains are needed to recover condensate of different pressure levels. At present, condensate recovery equipment all utilizes small sets of proprietary equipment. There are small sets of equipment that use electric centrifugal pumps to transport condensate, and there are small sets of equipment that use steam as the power source. Their advantages are high integration, but the process is more complicated and relatively expensive. When condensate is collected, flash steam needs to be released, which generates noise. In addition, condensate of different pressure levels requires small sets of proprietary equipment of different levels and cannot be recovered uniformly using one set of equipment.

[0003] Publication No. CN102221196B, "Fully-enclosed condensate automatic recovery pump and method", uses steam as a power source to recover the steam released by the flash evaporation of condensate, but lacks pressure regulation for the condensate booster, and does not perform separate operations for collecting and pressing out. It cannot continuously recover condensate of various pressure levels, but only intermittently recovers condensate of a single pressure level, and is manually operated, making it difficult to replace small sets of equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a condensate conveying system, which overcomes the shortcomings of the prior art, utilizes steam as a power source, can simultaneously recover condensate of multiple routes and multiple pressure levels, does not release flash steam of condensate to the outside, does not generate noise, simplifies the process, and improves the degree of automation.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A condensate conveying system comprises a water collecting tank and a water delivery tank, wherein a circulating cooling coil is arranged on the top of the water collecting tank, the bottoms of the water collecting tank and the water delivery tank are connected via a connecting pipe, a check valve 1 is arranged on the connecting pipe, the top of the water delivery tank is connected to a power steam pipe, a solenoid valve 1 is arranged on the power steam pipe, a condensate external discharge pipe is connected to the bottom of the water delivery tank, a check valve 2 is arranged on the condensate external discharge pipe; the tops of the water collecting tank and the water delivery tank are connected via a balancing pipe, a throttling orifice plate and a solenoid valve 2 are arranged on the balancing pipe, the circulating cooling coil is connected to a circulating cooling water pipe, a pressure regulating valve is arranged on the circulating cooling water pipe, and a multi-channel steam condensate pipe is connected to the middle section of the side wall of the water collecting tank body; a pressure recording control instrument and a liquid level recording instrument are arranged in the water collecting tank, and the pressure regulating valve is interlocked with the pressure recording control instrument for control; a liquid level recording control instrument is arranged in the water delivery tank, and the solenoid valve 1 and the solenoid valve 2 are interlocked with the liquid level recording control instrument for control.

[0007] The water collecting tank and the water conveying tank are both vertical tanks, and the volume of the water collecting tank is greater than that of the water conveying tank.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1) By using steam as the power source, condensate of multiple different pressure levels can be recovered at the same time, without releasing flash steam of condensate to the outside, without generating noise, and with good compatibility with production process and high integration.

[0010] 2) The process is simple and highly automated, and it can be manufactured according to the design, saving investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the process flow of an embodiment of the utility model.

[0012] In the figure: 1-water collecting tank, 2-water transfer tank, 3-pressure regulating valve, 4-solenoid valve 1, 5-solenoid valve 2, 6-check valve 1, 7-throttling orifice plate, 8-check valve 2, 9-circulating cooling coil, 10-connecting pipe, 11-balancing pipe, 12-condensate discharge pipe, 13-steam condensate pipe, PRC-pressure recording and control instrument, LR-liquid level recording instrument, LRC-liquid level recording and control instrument, H-liquid level upper limit, L-liquid level lower limit. DETAILED DESCRIPTION

[0013] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0015] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0016] See Figure 1 , is a process flow diagram of an embodiment of a condensate water transport system of the utility model, comprising a water collecting tank 1 and a water delivery tank 2, a circulating cooling coil 9 is arranged on the top of the water collecting tank 1, the bottoms of the water collecting tank 1 and the water delivery tank 2 are connected through a connecting pipe 10, a check valve 6 is arranged on the connecting pipe 10, the top of the water delivery tank 2 is connected to a power steam pipe, a solenoid valve 4 is arranged on the power steam pipe, a condensate external discharge pipe 12 is connected to the bottom of the water delivery tank 2, a check valve 8 is arranged on the condensate external discharge pipe 12; the tops of the water collecting tank 1 and the water delivery tank 2 are connected through a balance pipe 11 The two water tanks are connected, the balancing pipe 11 is provided with a throttling orifice plate 7 and a solenoid valve 2 5, the circulating cooling coil 9 is connected to the circulating cooling water pipe, the circulating cooling water pipe is provided with a pressure regulating valve 3, the middle section of the side wall of the water collecting tank 1 is connected to the multi-way steam condensate pipe 13; the water collecting tank 1 is provided with a pressure recording control instrument PRC and a liquid level recording instrument LR, the pressure regulating valve 3 is interlocked with the pressure recording control instrument PRC; the water delivery tank 2 is provided with a liquid level recording control instrument LRC, the solenoid valve 1 4 and the solenoid valve 2 5 are interlocked with the liquid level recording control instrument LRC. The water collecting tank 1 and the water delivery tank 2 are both vertical tanks, and the volume of the water collecting tank 1 should be greater than that of the water delivery tank 2 to ensure sufficient liquid level difference.

[0017] In the embodiment, the water delivery tank 2 uses power steam as an external power source, does not have an external pump, and simultaneously recovers condensate of multiple different pressure levels without releasing flash steam of condensate to the outside, so no noise is generated. The control process is fully automatically controlled by a PLC controller, and the specific operation steps of the control process are as follows:

[0018] 1) Condensation, the vertical water collection tank 1 is used to collect condensate of different pressure levels in multiple channels. The external steam condensate is sent to the middle of the water collection tank 1 according to different pressure levels. The upper part of the water collection tank 1 is provided with a circulating water cooling coil 9. After the condensate enters the water collection tank 1, flash steam will be generated. The circulating cooling water of the circulating cooling water coil condenses the flash steam. The lower part of the water collection tank 1 is used to collect and store condensate. The internal pressure of the water collection tank 1 is controlled by the pressure regulating valve 3 and the pressure recording and control instrument PRC-01. The pressure is slightly lower than the condensate pressure of the lowest pressure level collected in multiple channels to ensure that condensate of various pressure levels can enter smoothly.

[0019] 2) External discharge: When the condensate in the water collecting tank 1 is full, the liquid level rises, and the liquid level recording instrument LR-01 displays the liquid level value in real time. The static pressure generated by the height difference of the liquid level of the condensate is sent to the water delivery tank 2 through the connecting pipe 10. When the liquid level of the water delivery tank 2 reaches the upper limit H, the solenoid valve 4 is opened, and the condensate in the water delivery tank 2 is pushed out from the lower part under the pressure of the power steam;

[0020] 3) Balance the pressure. When the liquid level of the water transfer tank 2 reaches the lower limit of the liquid level and the liquid level displayed by the liquid level recording and control instrument LRC-02 reaches the lower limit of the liquid level L, close the solenoid valve 14, stop introducing the motive steam, open the solenoid valve 25 on the balance pipe 11 connecting the upper part of the water transfer tank 2 and the upper part of the water collecting tank 1, and the motive steam inside the water transfer tank 2 slowly enters the upper part of the water collecting tank 1 under the action of the throttling orifice plate 7, condenses through the circulating cooling water on the upper part of the water collecting tank 1, and falls to the bottom of the water collecting tank until the water collecting tank 1 and the water transfer tank 2 reach pressure balance, and return to step 2) for continuous circulation.

[0021] In the embodiment, the pressure of the power steam is higher than the pressure in the water collecting tank 1, and the pressure difference is not greater than 0.1 MPa. The ratio of the aperture of the throttling orifice plate to the diameter of the balance pipe is preferably 0.25-0.5:1.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A condensate water delivery system, characterized in that: It includes a water collecting tank and a water delivery tank. A circulating cooling coil is arranged on the top of the water collecting tank. The bottoms of the water collecting tank and the water delivery tank are connected by a connecting pipe. A check valve 1 is arranged on the connecting pipe. The top of the water delivery tank is connected to a power steam pipe. A solenoid valve 1 is arranged on the power steam pipe. The bottom of the water delivery tank is connected to a condensate discharge pipe. A check valve 2 is arranged on the condensate discharge pipe. The tops of the water collecting tank and the water delivery tank are connected by a balancing pipe. A throttling orifice plate and a solenoid valve 2 are arranged on the balancing pipe. The circulating cooling coil is connected to a circulating cooling water pipe. A pressure regulating valve is arranged on the circulating cooling water pipe. The middle section of the side wall of the water collecting tank body is connected to multiple steam condensate pipes. A pressure recording control instrument and a liquid level recording instrument are arranged in the water collecting tank. The pressure regulating valve is interlocked with the pressure recording control instrument. A liquid level recording control instrument is arranged in the water delivery tank. Solenoid valve 1 and solenoid valve 2 are interlocked with the liquid level recording control instrument.

2. A condensate conveying system according to claim 1, characterized in that: The water collecting tank and the water conveying tank are both vertical tanks, and the volume of the water collecting tank is greater than that of the water conveying tank.

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