Integrated continuous ammonia steam generator

Abstract

The application relates to a kind of integrated continuous ammonia steam generator, ammonia steam generator and ammonia steam superheater connected by connecting pipe are arranged on the corresponding two sides of its base, ammonia steam generator includes first furnace body, the bottom of first furnace body is provided with heater, first furnace body is provided with ammonia water inlet above heater, first furnace body is provided with liquid level meter above ammonia water inlet, the top of first furnace body is connected with ammonia steam outlet, inlet liquid level regulating valve is arranged on ammonia water inlet, inlet liquid level regulating valve is connected with liquid level meter, the liquid level of ammonia water in first furnace body is automatically adjusted to a constant value, ammonia steam superheater includes second furnace body, the bottom of second furnace body is provided with heater, second furnace body is provided with liquid accumulation discharge port above the heater, second furnace body is provided with ammonia superheated steam outlet above the liquid accumulation discharge port, the top of second furnace body is connected with ammonia steam inlet. Since the liquid level of ammonia water in first furnace body is constant, ammonia steam with constant composition can be obtained.

Description

Technical Field

[0001] This invention relates to the fields of new materials and chemical equipment technology, and in particular to an integrated continuous ammonia steam generator. Background Technology

[0002] In the process of molecular sieve preparation, in order to improve the catalytic activity, stability, light oil conversion rate and service life of molecular sieve, it is usually necessary to introduce a constant steam atmosphere into the calcination furnace to force the molecular sieve to undergo a dealumination and silicon replenishment reaction in the ammonia steam atmosphere, so as to obtain an ultra-stable molecular sieve with a large specific surface area, high selectivity, high activity and high silicon-to-aluminum ratio.

[0003] Currently, ammonia vapor is mainly produced in industry by mixing ammonia gas and steam. However, due to steam metering errors, the ammonia concentration in the produced ammonia vapor fluctuates greatly, which seriously affects the catalytic activity of the prepared molecular sieve. When producing ammonia vapor by evaporating ammonia water, the ammonia concentration in the ammonia vapor is high at the beginning, but gradually decreases as the evaporation process proceeds, making it impossible to ensure that the ammonia vapor concentration remains constant. Therefore, in order to address the shortcomings of traditional methods, it is of great significance to develop an integrated ammonia vapor preparation furnace that can obtain a constant composition. Summary of the Invention

[0004] Based on the above, the purpose of this invention is to provide an integrated continuous ammonia steam generator to obtain a small amount of ammonia steam with a constant composition.

[0005] Therefore, the present invention provides an integrated continuous ammonia steam generator, including a base, on which an ammonia steam generator and an ammonia steam superheater are arranged on corresponding sides.

[0006] The ammonia vapor generator includes a first furnace body, a heater at the bottom of the first furnace body, an ammonia water inlet above the heater, a level gauge above the ammonia water inlet, and an ammonia vapor outlet connected to the top of the first furnace body via a connecting pipe. An inlet level regulating valve is installed at the ammonia water inlet, interlocked with the level gauge to automatically regulate the ammonia water level in the first furnace body to a constant value.

[0007] The ammonia vapor superheater includes a second furnace body, a heater is provided at the bottom of the second furnace body, a liquid drain port is provided above the heater, an ammonia superheated steam outlet is provided above the liquid drain port, and an ammonia vapor inlet connected to a connecting pipe is provided at the top of the second furnace body.

[0008] In the integrated continuous ammonia steam generator of the present invention, preferably, the heater is an electric heater.

[0009] In the integrated continuous ammonia steam generator of the present invention, preferably, a pressure regulating valve is provided on the ammonia steam outlet, and the pressure regulating valve is interlocked with the electric heater of the ammonia steam generator to automatically adjust the heating power of the electric heater until the ammonia steam outlet pressure is a constant value.

[0010] In the integrated continuous ammonia steam generator of the present invention, preferably, a liquid level regulating valve is provided on the ammonia superheated steam inlet, and the liquid level regulating valve is interlocked with the liquid level of the ammonia steam generator to automatically regulate the liquid level of the ammonia steam generator to a constant value, so as to prevent the steam generator from being damaged due to dry burning at a low liquid level.

[0011] In the integrated continuous ammonia steam generator of the present invention, preferably, a safety valve is provided on the ammonia superheated steam outlet.

[0012] In the integrated continuous ammonia steam generator of the present invention, preferably, a sampling port is provided on the connecting pipe, and a sampling valve is provided on the sampling port.

[0013] In the integrated continuous ammonia steam generator of the present invention, preferably, the ammonia steam outlet is an ammonia steam outlet elbow.

[0014] In the integrated continuous ammonia steam generator of the present invention, preferably, the ammonia steam inlet is an ammonia steam inlet elbow.

[0015] In the integrated continuous ammonia steam generator of the present invention, preferably, the first furnace body and the second furnace body are each a straight pipe with openings at both ends, and the bottom of the straight pipe is connected to the base.

[0016] In the integrated continuous ammonia steam generator of the present invention, preferably, the first furnace body and the second furnace body are each a straight pipe with an open top, and the bottom of the straight pipe is connected to the base.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. In this invention, the level gauge and the feed level regulating valve in the ammonia vapor generator are interlocked, which can ensure that the liquid level of the first furnace body is always constant, and the volume of the evaporation section of the steam generator is small, which can ensure the constant ammonia concentration in the ammonia vapor.

[0019] 2. In this invention, the ammonia vapor generator and the ammonia vapor superheater are connected as a whole by a connecting pipe, so that the vaporization and superheating of ammonia water can be completed in one device. The device has a simple and compact structure, which greatly reduces the footprint of the device.

[0020] 3. In this invention, the liquid level in the ammonia vapor generator is always higher than that in the electric heating tube, which can effectively prevent the electric heating tube from overheating and burning out.

[0021] 4. The equipment of this invention is simple. Both the first furnace body and the second furnace body can be a straight pipe. The pipe diameter and length can be selected according to the ammonia vapor demand, and the manufacturing cost is low. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the integrated continuous ammonia steam generator of the present invention.

[0023] Figure 2 This is a schematic diagram of the integrated continuous ammonia steam generator of the present invention in use.

[0024] In the diagram: 1. Electric heater; 2. Ammonia vapor generator; 3. Ammonia water inlet; 4. Lower port of level gauge; 5. Upper port of level gauge; 6. Ammonia vapor outlet elbow; 7. Connecting pipe; 8. Steam inlet elbow; 9. Ammonia vapor superheater; 10. Ammonia superheated steam outlet; 11. Liquid drain port; 12. Electric heater; 13. Base; 14. Sampling port; 15. First furnace body; 16. Second furnace body. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Component symbols and / or letters may be repeated in various embodiments. This repetition is for simplification and clarification and does not, in itself, define the relationship between the discussed embodiments and / or configurations.

[0026] like Figure 1 As shown, the integrated continuous ammonia steam generator provided by the present invention includes a base 13, on which an ammonia steam generator 2 and an ammonia steam superheater 9 are arranged on corresponding sides.

[0027] The ammonia vapor generator 2 includes a first furnace body 15. An electric heater 1 is located at the bottom of the first furnace body 15. An ammonia water inlet 3 is located above the electric heater 1 on the first furnace body 15. A level gauge is located above the ammonia water inlet 3 on the first furnace body 15. The level gauge includes an upper inlet 4 and a lower inlet 5. The upper inlet 4 is located at the top of the first furnace body, and the lower inlet 5 is located above the ammonia water inlet 3. An ammonia vapor outlet elbow 6, connected to a connecting pipe 7, is connected to the top of the first furnace body 15. An inlet level regulating valve (not shown) is located on the ammonia water inlet 3. The inlet level regulating valve is interlocked with the level gauge, automatically regulating the ammonia water level in the first furnace body 15 to a constant value.

[0028] The ammonia vapor superheater 9 includes a second furnace body 16, an electric heater 12 at the bottom of the second furnace body 16, a liquid drain port 11 above the electric heater 12, an ammonia superheated steam outlet 10 above the liquid drain port 11, and an ammonia vapor inlet elbow 8 connected to the top of the second furnace body 16 and communicating with the connecting pipe 7.

[0029] In some embodiments, combined with Figure 2 As shown, a pressure regulating valve is provided on the ammonia vapor outlet elbow body 6. The pressure regulating valve is interlocked with the electric heater 1 of the ammonia vapor generator 2, and automatically adjusts the heating power of the electric heater 1 until the ammonia vapor outlet pressure is a constant value.

[0030] In some embodiments, combined with Figure 2 As shown, a pressure regulating valve is provided on the ammonia superheated steam outlet 10. The pressure regulating valve is interlocked with the electric heater 12 of the ammonia steam superheater 9, and automatically adjusts the heating power of the electric heater 12 until the ammonia superheated steam outlet pressure is a constant value.

[0031] In some embodiments, the connecting tube 7 is provided with a sampling port 14.

[0032] In some embodiments, the first furnace body 15 and the second furnace body 16 are each a straight pipe with openings at both ends, and the bottom of the straight pipe is connected to the base 13; in other embodiments, the first furnace body 15 and the second furnace body 16 are each a straight pipe with an opening at the top, and the bottom of the straight pipe is connected to the base 13.

[0033] In some embodiments, combined with Figure 2 As shown, a safety valve is installed at the ammonia superheated steam outlet 10. When the pressure in the ammonia steam generator exceeds the safety valve's tripping pressure, the safety valve automatically opens to release pressure, ensuring the safety of the ammonia steam generator.

[0034] In some embodiments, a sampling valve (not shown) is provided on the sampling port 14; the ammonia vapor concentration in the ammonia vapor generator is sampled and analyzed in real time through the sampling valve.

[0035] The diameter and length of the straight pipe sections of the first and second furnace bodies can be selected according to the ammonia steam generator 2 and the ammonia steam superheater 9 based on the ammonia steam demand.

[0036] During operation, ammonia water enters the ammonia steam generator 2 from the ammonia water inlet 3 through an external gear pump (ammonia water pressurization pump). The ammonia water near the electric heater 1 evaporates rapidly and rises to the ammonia steam outlet elbow 6. Then, it enters the ammonia steam superheater 9 from the ammonia steam inlet elbow 8 through the connecting pipe 7. After contacting the electric heating tube 12, it becomes superheated steam and leaves the second furnace body 16 from the ammonia steam outlet 10 to be sent to the point of use.

[0037] In the above process, the level gauge and the feed level regulating valve in the ammonia vapor generator 2 are interlocked to ensure that the liquid level in the first furnace body 15 remains constant. In addition, the volume of the evaporation section of the steam generator is small, which can ensure that the ammonia concentration in the ammonia vapor remains constant.

[0038] During the above process, the liquid level in the ammonia vapor generator 2 is always higher than that in the electric heating tube 1, which can effectively prevent the electric heating tube 1 from overheating and burning out.

[0039] Furthermore, in this invention, the ammonia vapor generator 2 and the ammonia vapor superheater 9 are connected as a whole by the connecting pipe 7, so that the vaporization and superheating of ammonia water can be completed in one device. The device has a simple and compact structure, which greatly reduces the footprint of the device.

[0040] Furthermore, the equipment of the present invention is simple. Both the first furnace body 15 and the second furnace body 16 can be a straight pipe. The pipe diameter and length can be selected according to the ammonia vapor demand, and the manufacturing cost is low.

[0041] It should be noted that the above preferred embodiments are only used to illustrate the present invention, but the present invention is not limited to the embodiments described. Any changes and modifications made by those skilled in the art within the scope of the present invention are within the protection scope of the present invention.

Claims

1. An integrated continuous ammonia steam generator, characterized in that, The system includes a base, on which ammonia vapor generators and ammonia vapor superheaters are disposed on corresponding sides. The ammonia vapor generator includes a first furnace body. A heater, which is an electric heater, is located at the bottom of the first furnace body. An ammonia water inlet is located above the heater. A level gauge is located above the ammonia water inlet. An ammonia vapor outlet, connected to a connecting pipe, is located at the top of the first furnace body. An inlet level regulating valve is installed at the ammonia water inlet and is interlocked with the level gauge to automatically regulate the ammonia water level in the first furnace body to a constant value. A pressure regulating valve is installed at the ammonia vapor outlet and is interlocked with the electric heater of the ammonia vapor generator to automatically adjust the heating power of the electric heater until the ammonia vapor outlet pressure is a constant value. The ammonia vapor superheater includes a second furnace body. A heater, which is an electric heater, is provided at the bottom of the second furnace body. A liquid drain port is provided above the heater, and an ammonia superheated steam outlet is provided above the liquid drain port. An ammonia vapor inlet connected to a connecting pipe is connected to the top of the second furnace body. A pressure regulating valve is provided on the ammonia superheated steam outlet. The pressure regulating valve is interlocked with the electric heater of the ammonia vapor superheater to automatically adjust the heating power of the electric heater to a constant value at the ammonia superheated steam outlet pressure. A safety valve is provided on the ammonia superheated steam outlet.

2. The integrated continuous ammonia steam generator as described in claim 1, characterized in that, The connecting pipe is equipped with a sampling port, and the sampling port is equipped with a sampling valve.

3. The integrated continuous ammonia steam generator as described in claim 1, characterized in that, The ammonia vapor outlet is an ammonia vapor outlet elbow.

4. The integrated continuous ammonia steam generator as described in claim 1, characterized in that, The ammonia vapor inlet is an ammonia vapor inlet elbow.

5. The integrated continuous ammonia steam generator as described in claim 1, characterized in that, The first furnace body and the second furnace body are both straight pipes with openings at both ends, and the bottom of the straight pipes are connected to the base.

6. The integrated continuous ammonia steam generator as described in claim 1, characterized in that, The first furnace body and the second furnace body are both straight pipes with open tops, and the bottom of the straight pipes are connected to the base.

7. The integrated continuous ammonia steam generator as described in claim 1, characterized in that, The level gauge includes an upper inlet and a lower inlet. The upper inlet is located at the top of the first furnace body, and the lower inlet is located above the ammonia inlet.

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