Automatic discharging device for non-condensable gas of crystallizer

Abstract

The utility model discloses an automatic discharging device for non-condensable gas of a crystallizer, which relates to the technical field of crystallizers and comprises a heat exchanger, a first discharging port and a second discharging port are respectively arranged at the upper end and the lower end of the heat exchanger; the first exhaust pipeline and the second exhaust pipeline are respectively connected to the first discharge port and the second discharge port; the first thermometer and the second thermometer are respectively connected in the first exhaust pipeline and the second exhaust pipeline; and the first discharge valve and the second discharge valve are respectively connected in the first exhaust pipeline and the second exhaust pipeline. In the operation process of the crystallization system, when the temperature measured by the thermometer continuously rises and exceeds a set value, the non-condensable gas discharge valve is opened and the non-condensable gas is discharged, and when the temperature returns to normal, the non-condensable gas discharge valve is closed, so that the energy consumption is reduced while the non-condensable gas is discharged in time and the normal operation of the crystallization system is ensured, and the phenomenon that the crystallization system is damaged due to excessive discharge of the non-condensable gas is prevented. Energy such as live steam is emptied, and a large amount of energy is wasted.

Description

Technical Field

[0001] The utility model relates to the technical field of crystallizers, and particularly relates to an automatic non-condensable gas discharging device for a crystallizer. Background Art

[0002] During the operation of the crystallization system in a high-salt water device, due to the high alkalinity and other indicators in the inlet water of the crystallization system, a large amount of non-condensable gas is generated when the concentrated brine is thermally decomposed during the evaporation crystallization process. The non-condensable gas in the concentrated brine refers to the non-condensable gaseous substances in the steam (including secondary steam), such as air, CO2, H2S, etc. They are mixed in the steam and enter the heater, staying on the heating tube wall of the heater and accumulating continuously, so that the wall surface is surrounded by a layer of non-condensable gas, blocking the contact between the steam and the wall surface. And the thermal conductivity of the gas is very small and the thermal resistance is very large, so the heat transfer thermal resistance is increased and the heat transfer coefficient is greatly reduced. Experiments have proved that when 1% of non-condensable gas is contained in the steam, the heat transfer coefficient of steam condensation is reduced by 60%. Due to the great influence of non-condensable gas on the heat exchange effect, during the existing operation of the device, the crystallization system often shows abnormal fluctuations due to the untimely discharge of non-condensable gas, resulting in a decrease in the processing capacity of the crystallization system, affecting the normal production of the device, or due to excessive discharge of non-condensable gas, discharging energy such as live steam, resulting in a large amount of energy waste. Content of the Utility Model

[0003] In order to solve the problems of the existing technology, the utility model provides an automatic non-condensable gas discharging device for a crystallizer, including:

[0004] A heat exchanger, with a first discharge port and a second discharge port respectively arranged at the upper and lower ends;

[0005] A first exhaust pipe and a second exhaust pipe, respectively connected to the first discharge port and the second discharge port;

[0006] A first thermometer and a second thermometer, respectively connected in the first exhaust pipe and the second exhaust pipe;

[0007] A first discharge valve and a second discharge valve, respectively connected in the first exhaust pipe and the second exhaust pipe.

[0008] Further, both the first discharge valve and the second discharge valve are solenoid valves.

[0009] Further, it further includes: a controller, electrically connected to the first thermometer, the second thermometer, the first discharge valve and the second discharge valve.

[0010] Further, it further includes: a first manual valve and a second manual valve, respectively connected in the first exhaust pipe and the second exhaust pipe;

[0011] And the first manual valve is located between the first thermometer and the heat exchanger, and the second manual valve is located between the second thermometer and the heat exchanger.

[0012] The beneficial effects of the technical solution provided by the present utility model are as follows: In the present utility model, thermometers are respectively added at the non-condensable gas discharge positions above and below the heat exchanger to measure the temperatures of the non-condensable gas discharge points above and below, and discharge valves are added to control the discharge of non-condensable gas. During the operation of the crystallization system, when the temperature measured by the thermometer continuously rises and exceeds the set value, the non-condensable gas discharge valve is opened to discharge the non-condensable gas. When the temperature returns to normal, the non-condensable gas discharge valve is closed. While ensuring the normal operation of the crystallization system by timely discharging non-condensable gas, energy consumption is reduced, and excessive discharge of non-condensable gas is prevented, so as to avoid wasting a large amount of energy such as live steam by venting it. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a non-condensable gas automatic discharge device for a crystallizer provided by the present utility model;

[0014] Figure 2 is a kind provided by the present utility model Figure 1 is an enlarged view of part A in.

[0015] Reference numerals: 1 - heat exchanger; 2 - first discharge port; 3 - second discharge port; 4 - first exhaust pipe; 5 - second exhaust pipe; 6 - first thermometer; 7 - second thermometer; 8 - first discharge valve; 9 - second discharge valve; 10 - first manual valve; 11 - second manual valve. Detailed Embodiments

[0016] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0017] To make the purpose, technical solution and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] It should be noted that in this embodiment, the orientation or positional relationship indicated by "bottom", "top", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0019] It should also be noted that in this embodiment, unless otherwise clearly specified and defined, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0020] See Figures 1-2 , a crystallizer non-condensable gas automatic discharge device, comprising: a heat exchanger 1, a first discharge port 2 and a second discharge port 3 are respectively arranged at the upper and lower ends of the heat exchanger 1, a first exhaust pipe 4 and a second exhaust pipe 5 are respectively connected to the first discharge port 2 and the second discharge port 3, in the exhaust direction of the first exhaust pipe 4, a first thermometer 6 and a first discharge valve 8 are sequentially connected in the first exhaust pipe 4, and in the exhaust direction of the second exhaust pipe 5, a second thermometer 7 and a second discharge valve 9 are sequentially connected in the second exhaust pipe 5.

[0021] The first thermometer 6 and the second thermometer 7 are respectively used to measure the temperatures of the upper and lower non-condensable gas discharge points, and the first discharge valve 8 and the second discharge valve 9 are respectively used to control the discharge of the upper and lower non-condensable gases. When the first thermometer 6 and the second thermometer 7 detect that the temperatures of the upper and lower non-condensable gas discharge points are higher than the set value, it indicates that there is a large amount of non-condensable gas accumulating in the heat exchanger 1. By opening the first discharge valve 8 and the second discharge valve 9, the non-condensable gas can be discharged in time to ensure the stable operation of the crystallization system. When the first thermometer 6 and the second thermometer 7 detect that the temperatures of the upper and lower non-condensable gas discharge points are lower than the set value, the first discharge valve 8 and the second discharge valve 9 are closed to prevent excessive discharge of non-condensable gas and waste a large amount of energy such as live steam.

[0022] Furthermore, both the first discharge valve 8 and the second discharge valve 9 are solenoid valves, and the models can be one of JL-V0930-001, JL-V0935-001, JL-V0830, and JL-V1046. The models of the first thermometer 6 and the second thermometer 7 can be one of Rosemount 644 and Endress+Hauser TMT270.

[0023] In addition, a controller is also provided. The model of the controller can be one of HE5710 and XZDFC-01. The controller is electrically connected to the first thermometer 6, the second thermometer 7, the first discharge valve 8 and the second discharge valve 9. The electrical connection is a connection method to achieve electrical continuity between circuits. It can be achieved by connecting different parts of the circuit through components such as wires, cables, and connectors, enabling current to flow between them; it can also be wireless, such as electromagnetic waves and radio frequencies, to achieve the transmission of energy or signals without physical wire connections.

[0024] The temperature threshold can be pre-stored in the controller. The first thermometer 6 and the second thermometer 7 respectively measure the temperatures at the upper and lower non-condensable gas discharge points and send the detection data to the controller. The controller makes a comparison. When the first detection data sent by the first thermometer 6 is greater than the temperature threshold, the controller sends a first opening signal to the first discharge valve 8, and the first discharge valve 8 opens after receiving the first opening signal. When the second detection data sent by the second thermometer 7 is greater than the temperature threshold, the controller sends a second opening signal to the second discharge valve 9, and the second discharge valve 9 opens after receiving the second opening signal. During the discharge process, the first thermometer 6 and the second thermometer 7 continuously monitor the temperature at the discharge point. When the first detection data sent by the first thermometer 6 received by the controller is less than the temperature threshold, the controller sends a first closing signal to the first discharge valve 8, and the first discharge valve 8 closes after receiving the first closing signal. When the second detection data sent by the second thermometer 7 is less than the temperature threshold, the controller sends a second closing signal to the second discharge valve 9, and the second discharge valve 9 closes after receiving the second closing signal.

[0025] The whole process is automatically controlled by the controller without human participation, which can ensure the timely discharge of non-condensable gas during daily production and avoid production fluctuations.

[0026] Furthermore, it also includes: a first manual valve 10 and a second manual valve 11, which are respectively connected in the first exhaust pipe 4 and the second exhaust pipe 5, and the first manual valve 10 is located between the first thermometer 6 and the heat exchanger 1, and the second manual valve 11 is located between the second thermometer 7 and the heat exchanger 1.

[0027] The models of the first manual valve 10 and the second manual valve 11 can be D71X, Z41T / Z45T, TJ40H / T40H, etc. The sizes of the exhaust ports of the first exhaust pipe 4 and the second exhaust pipe 5 can be adjusted through the first manual valve 10 and the second manual valve 11, so as to adjust the discharge speed when discharging non-condensable gas.

[0028] It should be noted that during the operation of the crystallization system, the steam in the heat exchanger is mainly saturated steam, while the non-condensable gas mainly exists in the form of superheated steam. In the present utility model, thermometers are respectively added at the upper and lower non-condensable gas discharge positions of the heat exchanger to measure the temperatures of the upper and lower non-condensable gas discharge points, and discharge valves are added to control the discharge of non-condensable gas. The thermometers and the discharge valves are automatically controlled by a controller. During the operation of the crystallization system, when the temperature measured by the thermometer continuously rises and exceeds the set value, the non-condensable gas discharge valve automatically opens to discharge the non-condensable gas. When the temperature returns to normal, the non-condensable gas discharge valve automatically closes. While discharging the non-condensable gas in a timely manner to ensure the normal operation of the crystallization system, the energy consumption is reduced.

[0029] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic non-condensable gas discharging device for a mold, characterized in that, Comprising: A heat exchanger (1) with a first discharge port (2) and a second discharge port (3) respectively provided at its upper and lower ends; A first exhaust pipe (4) and a second exhaust pipe (5) respectively connected to the first discharge port (2) and the second discharge port (3); A first thermometer (6) and a second thermometer (7) respectively connected inside the first exhaust pipe (4) and the second exhaust pipe (5); A first discharge valve (8) and a second discharge valve (9) respectively connected inside the first exhaust pipe (4) and the second exhaust pipe (5).

2. The automatic non-condensable gas discharging device for the mold according to claim 1, characterized in that Both the first discharge valve (8) and the second discharge valve (9) are solenoid valves.

3. The automatic non-condensable gas discharging device for the mold according to claim 2, characterized in that, Further comprising: A controller electrically connected to the first thermometer (6), the second thermometer (7), the first discharge valve (8) and the second discharge valve (9).

4. The non-condensable gas automatic discharge device for a mold according to claim 3, characterized in that Further comprising: A first manual valve (10) and a second manual valve (11) respectively connected inside the first exhaust pipe (4) and the second exhaust pipe (5); And the first manual valve (10) is located between the first thermometer (6) and the heat exchanger (1), and the second manual valve (11) is located between the second thermometer (7) and the heat exchanger (1).

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