Condensate recovery device for water bath type vaporizer

Abstract

The utility model relates to a water bath type vaporizer condensate water recovery device, and belongs to the technical field of condensate water recovery. Comprising a condensate water storage tank, a condensate water pump, a condensate water storage tank liquid level meter and a condensate water internal pipe network, the top of the condensate water storage tank is lower than the bottom of a water bath type vaporizer, an overflow port of the water bath type vaporizer is communicated with the top of the condensate water storage tank, and the bottom of the water bath type vaporizer is connected to the top of the condensate water storage tank through a guide spraying connecting pipeline; the bottom of the side face of the condensate water storage tank is connected with an inlet of a condensate water pump through a pipeline, an outlet of the condensate water pump is provided with a check valve, a tank returning line and a delivery line are arranged behind the check valve, the tank returning line is connected to the top of the condensate water tank, the delivery line is connected with a condensate water internal pipe network, the tank returning line is provided with a tank returning adjusting valve, and the delivery line is provided with a delivery adjusting valve. And the condensate water storage tank liquid level meter is electrically connected with the tank returning regulating valve. The condensate discharging device effectively solves the problem of condensate waste caused by condensate discharging, and is simple in structure, convenient to use, easy to operate and low in cost.

Description

Technical Field

[0001] The utility model relates to a water bath type vaporizer condensate recovery device, belonging to the technical field of condensate recovery. Background Art

[0002] When an air separation unit is shut down due to a fault or the after-system is under maintenance, in order to maintain the operation of the after-system or the normal nitrogen consumption of the unit, the air separation backup nitrogen system will raise the liquid nitrogen in the storage tank to the required pressure through a high-pressure liquid nitrogen backup pump, vaporize it in a water bath vaporizer and output it as high-pressure nitrogen for use in the after-system. When the water bath vaporizer is in operation, a large amount of steam condensate overflows through the overflow port and is discharged locally. The high-pressure liquid nitrogen pump runs continuously every day, causing a large increase in condensate discharge. In low-temperature environments, to prevent the water bath vaporizer from freezing, the steam valve is set to a certain opening, allowing steam to enter the water bath vaporizer and condense. At the same time, the liquid level in the water bath vaporizer rises, and some condensate flows out of the overflow port. All of these phenomena lead to condensate waste. Currently, few users recycle and reuse steam condensate, and it is mainly recycled to the boiler room through pipelines. Most companies have no users who recycle or reuse this condensate, so they directly discharge it, resulting in a waste of water resources; some companies recycle it into boilers for reuse, but due to the long transportation distance and certain requirements for transportation pressure, additional investment and operating costs such as water pumps and pipelines are required, which makes it less economical.

[0003] The issue of steam condensate recovery has always attracted much attention. Problems such as the small number of recycling users and high recycling costs have become prominent. Some companies even discharge the condensate directly, resulting in energy waste. Regarding steam condensate recovery, a Chinese invention patent with publication number cn215002542U and publication date of December 3, 2021, discloses a steam condensate recovery and utilization system inside an oxygen production station. The system includes a steam heater and a residual liquid evaporator. A water tank is provided between the steam heater and the residual liquid evaporator. The output end of the water tank is sequentially provided with a water pump and a water bath vaporizer. Recovery pipelines are provided between the water pump and the water tank and the water bath vaporizer. This invention drains the condensed water from the steam heater and the residual liquid evaporator through an underground drainage pipe and connects it to a water tank. The water in the water tank is then transported to the water supply interface of the water bath vaporizer by a water pump, effectively recycling the steam condensed water that has been discharged from the oxygen production station for a long time. By recycling the steam condensed water inside the oxygen production station as supplementary water for the water bath vaporizer, the problem of slagging in the equipment after long-term operation of ordinary industrial water can be solved.

[0004] While this technology provides a new way to recycle steam condensate, the system is complex, requires numerous devices, and lacks automatic control. Furthermore, since the collected condensate is used as make-up water for the vaporizer and cannot be promptly incorporated into the condensate network, the water tank fills up within a few hours at a typical discharge rate of approximately 2 tons / hour. Consequently, only a small portion of the recovered condensate is utilized, and the majority must be discharged. Summary of the Invention

[0005] According to the background problem, the problem to be solved by the present invention is:

[0006] The condensate utilization rate of the water bath vaporizer is low and recovery is difficult, resulting in waste.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A condensate recovery device for a water bath vaporizer comprises a condensate storage tank, a condensate pump, a condensate storage tank level gauge and a condensate internal pipe network, wherein the top of the condensate storage tank is arranged lower than the bottom of the water bath vaporizer, the overflow port of the water bath vaporizer is connected to the top of the condensate storage tank, and the bottom of the water bath vaporizer is connected to the top of the condensate storage tank through a shower connection pipeline; the bottom of the side of the condensate storage tank is connected to the condensate pump inlet through a pipeline, and the condensate storage tank and the condensate pump are sequentially provided with an inlet valve and a filter; the condensate pump outlet is provided with a check valve, and a return tank line and an external delivery line are provided after the check valve, the return tank line is connected to the top of the condensate storage tank, the external delivery line is connected to the condensate internal pipe network, and the return tank line is provided with a return tank regulating valve, the external delivery line is provided with an external delivery regulating valve, and the condensate storage tank level gauge is electrically connected to the return tank regulating valve.

[0009] Preferably, a drain valve is provided at the bottom of the condensate storage tank.

[0010] Preferably, the condensate storage tank is made of stainless steel, which has good corrosion resistance, high strength, high temperature resistance, oxidation resistance, easy cleaning, high finish, and simple maintenance.

[0011] Preferably, the upper part and the top of the condensate storage tank are respectively provided with a manhole and a breathing hole. The manhole is convenient for maintenance and cleaning, and a breathing port is installed on the upper part. Since the water bath vaporizer is at normal pressure, the breathing port is installed to facilitate the overflow of condensate to enter the condensate storage tank more easily.

[0012] Preferably, the internal condensate pipe network includes a plant domestic heating water line, a heating station, a heat exchanger and an external condensate pipe network.

[0013] Preferably, the return tank regulating valve and the external delivery regulating valve can be controlled and adjusted by the DCS system.

[0014] The condensate from the water-bath evaporator is connected to the plant's domestic heating water lines, heat tracing stations, heat exchangers, and the external condensate distribution network through its condensate recovery device, providing a certain flow rate for these pipelines and equipment and returning it to the water circulation. This not only allows the condensate from the water-bath evaporator to release heat, improving thermal energy utilization, but also eliminates the need for a separate condensate circulation line, saving costs.

[0015] The condensate storage tank level gauge controls the opening and closing degree of the return tank regulating valve, and thus can control the liquid level of the condensate storage tank or the stability of external procurement, ensuring that the condensate of the water bath vaporizer can be recovered and utilized to the greatest extent.

[0016] The beneficial effects of the utility model are:

[0017] The utility model effectively solves the problem of condensate waste caused by condensate discharge, and has a simple structure, is convenient to use, easy to operate and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the condensate recovery device for a water bath vaporizer

[0019] In the figure: 1 is a water bath vaporizer; 2 is a condensate storage tank; 21 is a drain valve; 3 is a condensate pump; 4 is an internal condensate pipe network; 5 is a condensate storage tank level gauge; 61 is a return tank regulating valve; 62 is an external regulating valve; 7 is an inlet valve; 8 is a filter; 9 is a check valve; 10 is a shower guide; 11 is an overflow port. DETAILED DESCRIPTION

[0020] Example 1

[0021] A condensate recovery device for a water bath vaporizer comprises a condensate storage tank 2 and a condensate pump 3, characterized in that it also comprises a condensate storage tank level gauge 5 and a condensate internal pipe network 4, wherein the top of the condensate storage tank 2 is arranged lower than the bottom of the water bath vaporizer 1, the overflow port 11 of the water bath vaporizer 1 is connected to the top of the condensate storage tank 2, and the bottom of the water bath vaporizer 1 is connected to the top of the condensate storage tank 2 through a pipeline. The bottom side of the condensate storage tank 2 is connected to the inlet of the condensate pump 3 through a pipeline, and an inlet valve 7 and a filter 8 are sequentially provided from the condensate storage tank 2 to the condensate pump 3; the outlet of the condensate pump 3 is provided with a check valve 9, and a return line and an external delivery line are provided after the check valve 9. The return line is connected to the top of the condensate tank 2, and the external delivery line is connected to the condensate internal pipe network 4, and the return line is provided with a return regulating valve 61, and the external delivery line is provided with an external delivery regulating valve 62. The condensate storage tank level gauge 5 is electrically connected to the return regulating valve 61.

[0022] A drain valve 21 is provided at the bottom of the condensate storage tank 2 .

[0023] The condensate storage tank 2 is made of stainless steel.

[0024] The upper part and the top of the condensate storage tank 2 are respectively provided with a manhole and a breathing hole.

[0025] The internal condensate pipe network 4 includes a domestic heating water line for the plant area, a heating station, a heat exchanger and an external condensate pipe network.

[0026] The return-to-tank regulating valve 61 and the external-delivery regulating valve 62 can both be controlled and regulated by the DCS system.

[0027] The condensate from the water-bath evaporator 1 is connected to the factory's domestic heating water lines, heat tracing stations, heat exchangers, and external condensate distribution networks through a condensate recovery system, replacing these systems for heat supply and returning them to the water circulation system. This not only allows the condensate from the water-bath evaporator 1 to release heat, improving thermal energy utilization, but also eliminates the need for additional evaporator condensate circulation lines, saving costs.

[0028] The condensate storage tank level gauge 5 controls the opening and closing degree of the return tank regulating valve 61, thereby controlling the liquid level of the condensate storage tank 2 or the stability of external collection, ensuring that the condensate of the water bath vaporizer 1 can be recovered and utilized to the greatest extent.

Claims

1. A water bath type vaporizer condensate recovery device, comprising a condensate storage tank (2) and a condensate pump (3), characterized in that: It also includes a condensate storage tank level gauge (5) and a condensate internal pipe network (4); the top of the condensate storage tank (2) is arranged lower than the bottom of the water bath vaporizer (1); the overflow port (11) of the water bath vaporizer (1) is connected to the top of the condensate storage tank (2); the bottom of the water bath vaporizer (1) is connected to the top of the condensate storage tank (2) through a pipeline (10); the bottom of the side of the condensate storage tank (2) is connected to the inlet of the condensate pump (3) through a pipeline, and the condensate storage tank (2) to The condensate pump (3) is provided with an inlet valve (7) and a filter (8) in sequence; the outlet of the condensate pump (3) is provided with a check valve (9); a return line and an external delivery line are provided after the check valve (9); the return line is connected to the top of the condensate storage tank (2); the external delivery line is connected to the condensate internal pipe network (4); the return line is provided with a return regulating valve (61); the external delivery line is provided with an external delivery regulating valve (62); and the condensate storage tank level gauge (5) is electrically connected to the return regulating valve (61).

2. The water bath type vaporizer condensate recovery device according to claim 1, characterized in that: A drain valve (21) is provided at the bottom of the condensate storage tank (2).

3. The water bath type vaporizer condensate recovery device according to claim 1, characterized in that: The condensate storage tank (2) is made of stainless steel.

4. The water bath type vaporizer condensate recovery device according to claim 1, characterized in that: The upper part and the top of the condensate storage tank (2) are respectively provided with a manhole and a breathing hole.

5. The water bath type vaporizer condensate recovery device according to claim 1, characterized in that: The condensate internal pipe network (4) includes a plant area domestic heating water line, a heating station, a heat exchanger and an external condensate pipe network.

6. The water bath type vaporizer condensate recovery device according to claim 1, characterized in that: The return tank regulating valve (61) and the external delivery regulating valve (62) can both be controlled and regulated by the DCS system.

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