Waste heat recycling device for hydrogen chloride synthetic furnace

Abstract

The utility model provides a hydrogen chloride synthesis furnace waste heat recycling device, and relates to the technical field of waste heat recovery, the hydrogen chloride synthesis furnace waste heat recycling device comprises a heat exchange tank, the top of the heat exchange tank is communicated with a gas-liquid separation tank, the gas-liquid separation tank is connected with a blow-down pipe, the gas-liquid separation tank is connected with a water supplementing assembly for conveying water into the gas-liquid separation tank, one side of the heat exchange tank is provided with a water outlet, and the other side of the heat exchange tank is provided with a water outlet; the heat exchange tank is connected with a steam input assembly for inputting steam into the heat exchange tank, and by-product steam generated when the hydrogen chloride synthesis furnace is cooled is input into the heat exchange tank through the steam input assembly for heat exchange; water in the heat exchange tank is heated and then discharged to existing heat energy demand equipment for use through cooperation of the water outlet and the pipeline, heat energy waste is avoided, the production cost of an enterprise is reduced, the steam and condensate water generated in the heat exchange process can be separated through the gas-liquid separation tank, the separated steam is discharged through the blow-down pipe, and the energy-saving effect is achieved. And the condensate water falls back into the heat exchange tank under the action of gravity, so that the loss of water resources is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of waste heat recovery, and in particular to a waste heat recovery and utilization device for a hydrogen chloride synthesis furnace. Background Art

[0002] Hydrochloric acid, the common name for aqueous hydrogen chloride solution, is a monobasic inorganic strong acid and an extremely important industrial raw material. It is typically produced industrially using the combustion process. First, sodium chloride solution is electrolyzed to produce sodium hydroxide along with the raw materials hydrogen and chlorine. The raw hydrogen and chlorine are dried separately and then passed through a burner in a hydrogen chloride synthesis furnace, where they are ignited and burned to produce hydrogen chloride gas. After cooling, the hydrogen chloride gas is absorbed by water to form hydrochloric acid. Cooling pure water is passed into the hydrogen chloride synthesis furnace to absorb waste heat, producing steam as a byproduct.

[0003] If the waste heat from the hydrogen chloride synthesis furnace's byproduct steam is not recovered and utilized, the heat energy contained therein will be wasted. In this case, the company will most likely need to purchase additional external energy to meet the heat needs of other production processes, which will undoubtedly increase production costs. Therefore, it is necessary to propose a waste heat recovery device for the hydrogen chloride synthesis furnace to recover and utilize the waste heat from this byproduct steam. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a waste heat recovery and utilization device for a hydrogen chloride synthesis furnace, which can solve the technical problem that the by-product steam of the hydrogen chloride synthesis furnace is not recovered and utilized, resulting in heat energy waste and increased production costs for the enterprise.

[0005] An embodiment of the present application provides a waste heat recovery and utilization device for a hydrogen chloride synthesis furnace, comprising a heat exchange tank, wherein a gas-liquid separation tank is connected to the top of the heat exchange tank, a vent pipe is connected to the gas-liquid separation tank, a water replenishment component is connected to the gas-liquid separation tank for supplying water to the gas-liquid separation tank, a water outlet is provided on one side of the heat exchange tank, and a steam input component is connected to the heat exchange tank for inputting steam into the heat exchange tank.

[0006] Furthermore, a heating coil is provided in the heat exchange tank, one end of the heating coil extends outside the heat exchange tank to form a steam inlet, the other end of the heating coil is sealed, and a plurality of exhaust holes are evenly provided on the heating coil.

[0007] Furthermore, the water supply assembly includes a hot water supply pipe, a pure water supply pipe, a hot water regulating valve and a pure water regulating valve, one end of the hot water supply pipe is connected to the gas-liquid separation tank, and the hot water regulating valve is arranged on the hot water supply pipe, one end of the pure water supply pipe is connected to the hot water supply pipe and is located between the hot water regulating valve and the gas-liquid separation tank, and the pure water regulating valve is arranged on the pure water supply pipe.

[0008] Furthermore, the steam input component includes a steam input pipe, a pure water input pipe, a steam temperature measuring instrument, a steam pressure measuring instrument, a steam flow regulating valve and a temperature-regulating pure water valve. One end of the steam input pipe is connected to the steam inlet, and the steam flow regulating valve, the steam temperature measuring instrument and the steam pressure measuring instrument are arranged in sequence on the steam input pipe along the steam input direction. One end of the pure water input pipe is connected to the steam input pipe and is located between the steam flow regulating valve and the steam temperature measuring instrument. The temperature-regulating pure water valve is arranged on the pure water input pipe.

[0009] Furthermore, it also includes an overflow component, which includes an overflow pipe, an overflow water inlet pipe, an overflow collecting liquid tank and an overflow drain pipe. The overflow water inlet pipe is arranged in the overflow collecting liquid tank, and the upper end of the overflow water inlet pipe extends to the outside of the overflow collecting liquid tank. One end of the overflow pipe is connected to the upper part of one side of the heat exchange tank, and the other end of the overflow pipe is connected to the upper end of the overflow water inlet pipe. The overflow drain pipe is connected to the upper part of one side of the overflow collecting liquid tank.

[0010] Furthermore, a metal wire mesh corrugated packing is provided in the gas-liquid separation tank, and the metal wire mesh corrugated packing is located below the connection between the hot water supply pipe and the gas-liquid separation tank.

[0011] Furthermore, the gas-liquid separation tank is provided with a first manhole and a second manhole, the first manhole and the second manhole are respectively provided on the upper and lower sides of the metal wire mesh corrugated packing, and the heat exchange tank is provided with a third manhole.

[0012] Furthermore, the heat exchange tank is provided with a first liquid level gauge and a second liquid level gauge for measuring the liquid level of the heat exchange tank, and the first liquid level gauge is located above the second liquid level gauge.

[0013] Furthermore, the heat exchange tank is provided with a thermometer for measuring the temperature of the liquid in the heat exchange tank.

[0014] Beneficial effects of the utility model:

[0015] The utility model inputs the by-product steam generated when the hydrogen chloride synthesis furnace is cooled into the heat exchange tank through the steam input component for heat exchange, heats the water in the heat exchange tank, and then discharges it to the existing heat energy demand equipment through the cooperation of the water outlet and the pipeline, thereby avoiding heat energy waste and reducing enterprise production costs. The gas-liquid separation tank can separate the steam and condensed water generated in the heat exchange process, and the separated steam is discharged through the vent pipe, while the condensed water falls back into the heat exchange tank under the action of gravity, thereby reducing the loss of water resources. The provision of the gas-liquid separation tank ensures the stability and reliability of the heat exchange process and improves the efficiency of waste heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the structure of some embodiments of the present application;

[0018] The reference numerals are:

[0019] 1. Heat exchange tank; 11. Third manhole; 12. First liquid level gauge; 13. Second liquid level gauge; 14. Thermometer; 15. Hot water return pipe; 16. Self-pressure return pipe; 2. Gas-liquid separation tank; 21. First manhole; 22. Second manhole; 3. Vent pipe; 4. Water supply assembly; 41. Hot water supply pipe; 42. Pure water supply pipe; 43. Hot water regulating valve; 44. Pure water regulating valve; 5. Water outlet; 6. Steam input assembly; 61. Steam input pipeline; 62. Pure water input pipeline; 63. Steam temperature measuring instrument; 64. Steam pressure measuring instrument; 65. Steam flow regulating valve; 66. Temperature-controlled pure water valve; 7. Heating coil; 71. Vent hole; 8. Overflow assembly; 81. Overflow pipe; 82. Overflow inlet pipe; 83. Overflow collection tank; 84. Overflow drain pipe; 9. Wire mesh corrugated packing. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. Specific embodiment:

[0027] like Figure 1 As shown, the present application provides a waste heat recovery and utilization device for a hydrogen chloride synthesis furnace, comprising a heat exchange tank 1, a gas-liquid separation tank 2 is connected to the top of the heat exchange tank 1, the gas-liquid separation tank 2 is connected to a vent pipe 3, the gas-liquid separation tank 2 is connected to a water replenishment component 4 for supplying water to the gas-liquid separation tank 2, a water outlet 5 is provided on one side of the heat exchange tank 1, the heat exchange tank 1 is connected to a steam input component 6 for inputting steam into the heat exchange tank 1, by-product steam generated when the hydrogen chloride synthesis furnace is cooled is input into the heat exchange tank 1 through the steam input component 6 for heat exchange, the water in the heat exchange tank 1 is heated and then discharged to existing heat energy demanding equipment through the water outlet 5 and the pipeline, thereby avoiding heat energy waste and reducing enterprise production costs, the gas-liquid separation tank 2 can separate the steam and condensed water generated during the heat exchange process, the separated steam is discharged through the vent pipe 3, and the condensed water falls back into the heat exchange tank 1 under the action of gravity, thereby reducing the loss of water resources, and the provision of the gas-liquid separation tank 2 ensures the stability and reliability of the heat exchange process and improves the efficiency of waste heat recovery.

[0028] like Figure 1As shown, a heating coil 7 is provided in the heat exchange tank 1, one end of the heating coil 7 extends to the outside of the heat exchange tank 1 to form a steam inlet, and the other end of the heating coil 7 is closed. A plurality of exhaust holes 71 are evenly provided on the heating coil 7. The arrangement of the heating coil 7 increases the contact area with the medium to be heated and improves the efficiency of heat exchange. The steam passes through the heating coil 7 and is then discharged from the exhaust holes 71. Tiny bubbles are formed during the discharge, and these bubbles are in full contact with the medium in the heat exchange tank 1, effectively enhancing the heat exchange effect.

[0029] like Figure 1 As shown, the water supply component 4 includes a hot water supply pipe 41, a pure water supply pipe 42, a hot water regulating valve 43 and a pure water regulating valve 44. One end of the hot water supply pipe 41 is connected to the gas-liquid separation tank 2, and the hot water regulating valve 43 is arranged on the hot water supply pipe 41. One end of the pure water supply pipe 42 is connected to the hot water supply pipe 41 and is located between the hot water regulating valve 43 and the gas-liquid separation tank 2. The pure water regulating valve 44 is arranged on the pure water supply pipe 42. The function of the water supply component 4 is to supply water to the gas-liquid separation tank 2 to maintain the water level balance of the system. During the heat exchange process, some water will evaporate or be discharged from the system. By replenishing the water source in time, it can be ensured that there is always enough water in the system for Heat exchange, which helps to maintain the system pressure stable and prevent equipment damage or decreased heat exchange efficiency due to low water level. The water supply component 4 includes a hot water supply pipe 41 and a pure water supply pipe 42, which provides two different water supply sources for the gas-liquid separation tank 2. The water supply method is flexible. The hot water regulating valve 43 and the pure water regulating valve 44 are respectively arranged on the hot water supply pipe 41 and the pure water supply pipe 42, which can accurately control the flow of the two water sources. The operator can adjust the opening of the hot water regulating valve 43 and the pure water regulating valve 44 according to the actual needs of the system to achieve precise control of the water supply amount, which helps to maintain the water level stability of the system and ensure the normal progress of the heat exchange process.

[0030] like Figure 1As shown, the steam input assembly 6 includes a steam input pipe 61, a pure water input pipe 62, a steam temperature measuring instrument 63, a steam pressure measuring instrument 64, a steam flow regulating valve 65 and a temperature-adjusting pure water valve 66. One end of the steam input pipe 61 is connected to the steam inlet, and the steam flow regulating valve 65, the steam temperature measuring instrument 63 and the steam pressure measuring instrument 64 are sequentially arranged on the steam input pipe 61 along the steam input direction. One end of the pure water input pipe 62 is connected to the steam input pipe 61 and is located between the steam flow regulating valve 65 and the steam temperature measuring instrument 63. The temperature-adjusting pure water valve 66 is arranged on the pure water input pipe 62. , and can monitor the temperature and pressure of steam in real time, so that the operator can accurately understand the state of the steam, providing a basis for adjusting the steam flow and controlling the heat exchange process. The steam flow regulating valve 65 can accurately control the flow of steam. According to the needs and actual working conditions of the heat exchange tank 1, the operator can control the amount of steam entering the heat exchange tank 1 by adjusting the opening of the steam flow regulating valve 65. When the steam temperature needs to be adjusted, the temperature regulating pure water valve 66 can be opened to inject an appropriate amount of pure water into the steam. The evaporation heat absorption of pure water can lower the temperature of the steam, thereby realizing the regulation of the steam temperature. This flexible temperature regulation method can meet different heat exchange requirements and improve the adaptability and reliability of the system.

[0031] like Figure 1 As shown, it also includes an overflow component 8, which includes an overflow pipe 81, an overflow water inlet pipe 82, an overflow collecting liquid tank 83 and an overflow drain pipe 84. The overflow water inlet pipe 82 is arranged in the overflow collecting liquid tank 83, and the upper end of the overflow water inlet pipe 82 extends to the outside of the overflow collecting liquid tank 83. One end of the overflow pipe 81 is connected to the upper part of one side of the heat exchange tank 1, and the other end of the overflow pipe 81 is connected to the upper end of the overflow water inlet pipe 82. The overflow drain pipe 84 is connected to the upper part of one side of the overflow collecting liquid tank 83. The setting of the overflow component 8 can solve the steam overflow in the non-overflow state and the gas-liquid coexistence discharge spray range during overflow, thereby improving on-site safety and operability. The overflow process can help stabilize the pressure of the heat exchange system. When the pressure in the heat exchange tank 1 increases, part of the liquid or steam flows out through the overflow pipe 81, thereby reducing the system pressure, which helps to prevent the system from malfunctioning due to excessive pressure and ensure the stable operation of the system.

[0032] like Figure 1As shown, a metal wire mesh corrugated packing 9 is provided in the gas-liquid separation tank 2, and the metal wire mesh corrugated packing 9 is located below the connection between the hot water supply pipe 41 and the gas-liquid separation tank 2. In this embodiment, the metal wire mesh corrugated packing 9 is a stainless steel wire mesh regular corrugated packing, which has a long service life and a good gas-liquid separation effect in a high temperature and humid environment. When the hot water supply pipe 41 supplies water to the heat exchange tank 1, the water first flows into the gas-liquid separation tank 2 and then into the heat exchange tank 1. When flowing into the gas-liquid separation tank 2, the water contacts the steam separated above the metal wire mesh corrugated packing 9, and can absorb part of the heat of the steam, thereby further recovering the heat.

[0033] like Figure 1 As shown, the gas-liquid separation tank 2 is provided with a first manhole 21 and a second manhole 22, and the first manhole 21 and the second manhole 22 are respectively arranged on the upper and lower sides of the metal wire mesh corrugated packing 9, and the heat exchange tank 1 is provided with a third manhole 11. During actual use, the first manhole 21, the second manhole 22 and the third manhole 11 are all provided with adaptive sealing covers. Through the first manhole 21 and the second manhole 22, it is convenient to inspect and maintain the inside of the gas-liquid separation tank 2. When it is necessary to inspect, clean or replace the metal wire mesh corrugated packing 9 in the gas-liquid separation tank 2, the operation can be performed by opening the manhole at the corresponding position, and the interior of the heat exchange tank 1 can be conveniently inspected and maintained through the third manhole 11.

[0034] like Figure 1 As shown, the heat exchange tank 1 is provided with a first liquid level gauge 12 and a second liquid level gauge 13 for measuring the liquid level of the heat exchange tank 1. The first liquid level gauge 12 is located above the second liquid level gauge 13. The liquid level in the heat exchange tank 1 is measured by the first liquid level gauge 12 and the second liquid level gauge 13, which makes it convenient for the staff to control the liquid level in the heat exchange tank 1 to prevent the liquid level from being too high or too low and affecting the stable operation of the heat exchange system. Specifically, the liquid level probes of the first liquid level gauge 12 and the second liquid level gauge 13 are both located in the heat exchange tank 1.

[0035] like Figure 1 As shown, the heat exchange tank 1 is provided with a thermometer 14 for measuring the temperature of the liquid in the heat exchange tank 1, which provides a basis for the staff to control the temperature in the heat exchange tank 1. Specifically, the temperature probe of the thermometer 14 is located in the heat exchange tank 1. In this embodiment, a hot water return pipe 15 and a self-pressure return pipe 16 are provided on the top of the heat exchange tank 1. The hot water after being used by the heat energy demanding equipment can be returned to the heat exchange tank 1 through the hot water return pipe 15 and the self-pressure return pipe 16.

[0036] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A waste heat recovery and utilization device for a hydrogen chloride synthesis furnace, characterized in that: It includes a heat exchange tank, the top of which is connected to a gas-liquid separation tank, the gas-liquid separation tank is connected to a vent pipe, the gas-liquid separation tank is connected to a water replenishment component for supplying water to the gas-liquid separation tank, a water outlet is provided on one side of the heat exchange tank, and the heat exchange tank is connected to a steam input component for inputting steam into the heat exchange tank.

2. The waste heat recovery and utilization device of a hydrogen chloride synthesis furnace according to claim 1, characterized in that: A heating coil is provided in the heat exchange tank, one end of the heating coil extends outside the heat exchange tank to form a steam inlet, the other end of the heating coil is sealed, and a plurality of exhaust holes are evenly provided on the heating coil.

3. The waste heat recovery and utilization device of a hydrogen chloride synthesis furnace according to claim 1, characterized in that: The water supply assembly includes a hot water supply pipe, a pure water supply pipe, a hot water regulating valve and a pure water regulating valve. One end of the hot water supply pipe is connected to the gas-liquid separation tank, and the hot water regulating valve is arranged on the hot water supply pipe. One end of the pure water supply pipe is connected to the hot water supply pipe and is located between the hot water regulating valve and the gas-liquid separation tank. The pure water regulating valve is arranged on the pure water supply pipe.

4. The waste heat recovery and utilization device of a hydrogen chloride synthesis furnace according to claim 2, characterized in that: The steam input component includes a steam input pipe, a pure water input pipe, a steam temperature measuring instrument, a steam pressure measuring instrument, a steam flow regulating valve and a temperature-regulating pure water valve. One end of the steam input pipe is connected to the steam inlet. The steam flow regulating valve, the steam temperature measuring instrument and the steam pressure measuring instrument are sequentially arranged on the steam input pipe along the steam input direction. One end of the pure water input pipe is connected to the steam input pipe and is located between the steam flow regulating valve and the steam temperature measuring instrument. The temperature-regulating pure water valve is arranged on the pure water input pipe.

5. The waste heat recovery and utilization device of a hydrogen chloride synthesis furnace according to claim 1, characterized in that: It also includes an overflow assembly, which includes an overflow pipe, an overflow water inlet pipe, an overflow collecting liquid tank and an overflow drain pipe. The overflow water inlet pipe is arranged in the overflow collecting liquid tank, and the upper end of the overflow water inlet pipe extends to the outside of the overflow collecting liquid tank. One end of the overflow pipe is connected to the upper part of one side of the heat exchange tank, and the other end of the overflow pipe is connected to the upper end of the overflow water inlet pipe. The overflow drain pipe is connected to the upper part of one side of the overflow collecting liquid tank.

6. The waste heat recovery and utilization device of a hydrogen chloride synthesis furnace according to claim 3, characterized in that: A metal wire mesh corrugated filler is provided in the gas-liquid separation tank, and the metal wire mesh corrugated filler is located below the connection between the hot water supply pipe and the gas-liquid separation tank.

7. The waste heat recovery and utilization device of a hydrogen chloride synthesis furnace according to claim 6, characterized in that: The gas-liquid separation tank is provided with a first manhole and a second manhole, the first manhole and the second manhole are respectively provided on the upper and lower sides of the metal wire mesh corrugated packing, and the heat exchange tank is provided with a third manhole.

8. The waste heat recovery and utilization device of a hydrogen chloride synthesis furnace according to claim 1, characterized in that: The heat exchange tank is provided with a first liquid level gauge and a second liquid level gauge for measuring the liquid level of the heat exchange tank, and the first liquid level gauge is located above the second liquid level gauge.

9. The waste heat recovery and utilization device of a hydrogen chloride synthesis furnace according to claim 1, characterized in that: The heat exchange tank is provided with a thermometer for measuring the temperature of the liquid in the heat exchange tank.

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