Ultra-pure ammonia production line and waste ammonia filling equipment thereof

Abstract

The utility model relates to an ultra-pure ammonia production line and waste ammonia filling equipment thereof, which are connected to the ultra-pure ammonia production line and are used for filling waste ammonia generated on the ultra-pure ammonia production line to prepare industrial ammonia. Comprising an ammonia absorption device, a temperature control device and a plurality of filling bottles, inlets of the filling bottles are connected with an ultra-pure ammonia production line through first pipelines, and outlets of the filling bottles are connected with the ammonia absorption device through second pipelines; and the temperature control device is communicated with the first pipeline and the second pipeline. According to the utility model, the waste generated by the rectifying tower in the ultra-pure ammonia production line is collected and filled into the filling bottle to be sold as industrial ammonia, so that the utilization rate of raw materials is improved, secondary pollution is eliminated, the quality of final products is further improved, the benefit maximization can be realized, the device can adapt to different ultra-pure ammonia production lines, and the production cost is reduced. Effective operation of the system is guaranteed, energy consumption is reduced, and applicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of filling systems, in particular to an ultra-pure ammonia production line and waste ammonia filling equipment thereof. Background Art

[0002] In the LED industry, which has been growing rapidly in recent years, ultra-pure ammonia can be used as one of the most important raw materials for the manufacture of LED blue-green epitaxial chips in its upstream industry; in the PV (solar cell) industry, ultra-pure ammonia can be used as an important nitrogen source for silicon nitride thin films in crystalline silicon solar cells; in the production and manufacturing of solar cells and LED chips, a large amount of ultra-pure ammonia is required as a nitrogen source; the application of ultra-pure ammonia in many industries has become more and more extensive, and the market demand is constantly increasing, with great market potential and high economic benefits. The impurities contained in 7N electronic grade ultra-pure ammonia include water, various metal elements such as Fe, Ca, Mg, light components such as H2, O2, CH4, CO, CO2, etc. The total content of impurities must be less than 100ppb (one ten-millionth), the water index must be less than 30ppb, and the sum of all metal element indexes must be less than 20ppb.

[0003] The electronic grade ultra-pure ammonia disclosed in the existing patents CN102320623A, CN102502701B, CN102730717A, and CN106315620A all use industrial ammonia as raw material, which is gasified, then degreased by a deoiler, and then passed through an adsorption filter before entering a distillation system for distillation. Among them, CN102320623A, CN102502701B, and CN102730717A mention that the product obtained by distillation needs to be purified by a purifier to obtain the final product. During the purification process, part of the ammonia flows out of the equipment with impurities, and these impurities are usually directly discharged or stored in an impurity storage tank, resulting in low raw material utilization, energy waste, and environmental pollution.

[0004] Therefore, in order to solve the above problems, it is necessary for technical personnel in this field to design an ultra-pure ammonia production line and its waste ammonia filling equipment to fill the waste ammonia generated in the purification and preparation process for industrial ammonia, improve the utilization rate of raw materials, eliminate secondary pollution, and improve the quality of the final product. Utility Model Content

[0005] The utility model aims to provide an ultra-pure ammonia production line and waste ammonia filling equipment thereof, which can reduce material waste, eliminate secondary pollution and improve filling safety.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a waste ammonia filling device for an ultra-pure ammonia production line, which is connected to the ultra-pure ammonia production line and is used to fill the waste ammonia generated in the ultra-pure ammonia production line with the waste ammonia to prepare industrial ammonia; it includes an ammonia absorption device, a temperature control device and a plurality of filling bottles, the inlet of the filling bottle is connected to the ultra-pure ammonia production line through a first pipeline, and the outlet of the filling bottle is connected to the ammonia absorption device through a second pipeline; the temperature control device is connected to the first pipeline and the second pipeline.

[0007] Preferably, the temperature control device comprises a cryogenic liquid supply device, a second pump and a recovery condenser. The cryogenic liquid supply device is used to transport cryogenic liquid to control the temperature of the first pipeline and the second pipeline. After filling, the cryogenic liquid enters the recovery condenser.

[0008] Preferably, the cryogenic liquid is nitrogen.

[0009] Preferably, the second pump is provided with an outlet reflux valve and an outlet valve, and the outlet reflux valve is used for precooling the second pump.

[0010] Preferably, a first pump and a pressure gauge are provided on the first pipeline connecting the ultrapure ammonia production line and the filling bottles; the operating frequency of the first pump is adjusted according to the number of filling bottles and the pressure gauge data.

[0011] Preferably, the first pump is provided with a pump valve and an air return valve.

[0012] Preferably, a feed valve is provided at the inlet of the filling bottle, and a discharge valve is provided at the outlet of the filling bottle.

[0013] Preferably, it also includes a safety discharge buffer tank, which is connected to the first pump through a pump outlet pipe, and a vent valve is provided on the pump outlet pipe; the first pipe is connected to the pump outlet pipe.

[0014] The present application also claims protection for an ultra-pure ammonia production line, comprising a distillation tower and an adsorption tower, wherein one end of the distillation tower is connected to the adsorption tower, and the other end is connected to a waste ammonia storage tank, and the waste ammonia storage tank is connected to the waste ammonia filling equipment of the ultra-pure ammonia production line described above; the adsorption tower is used to produce electronic grade ultra-pure ammonia products.

[0015] Preferably, the waste ammonia storage tank is provided with a waste ammonia feed valve and a waste ammonia discharge valve, and the first pipeline connects the waste ammonia discharge valve with the filling bottle.

[0016] Preferably, the distillation tower comprises a first distillation tower and a second distillation tower, and the first purification tower and the second purification tower are used to remove light and heavy components respectively.

[0017] Due to the application of the above technical solution, the beneficial effects of the utility model are:

[0018] 1. The utility model collects the waste generated by the distillation tower in the ultra-pure ammonia production line and fills it into filling bottles for sale as industrial ammonia, thereby improving the utilization rate of raw materials while eliminating secondary pollution, and further improving the quality of the final product, thereby maximizing profits.

[0019] 2. The utility model adjusts the operating frequency of the first pump according to the number of filled bottles and the pressure gauge data, and provides a vent valve to adjust the pressure, thereby achieving pressure difference filling and eliminating the safety hazards caused by overpressure filling and overfilling.

[0020] 3. The ultra-pure ammonia production line in the utility model produces industrial ammonia products while preparing refined electronic-grade ultra-pure ammonia products, thereby reducing production costs while maximizing profits. It can also adapt to different ultra-pure ammonia production lines, ensure the effective operation of the system, reduce energy consumption, and has greater applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, some of the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The utility model is a schematic diagram of the overall structure of an embodiment.

[0023] Among them, 1. Ultra-pure ammonia production line; 2. Filling bottle; 3. Ammonia absorption device; 4. Temperature control device; 5. First pipeline; 6. Second pipeline; 7. Recovery condenser; 8. Safety discharge buffer tank; 9. Pump outlet pipeline. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Embodiment 1

[0027] like Figure 1 As shown, a waste ammonia filling device for an ultra-pure ammonia production line is connected to the ultra-pure ammonia production line and is used to fill the waste ammonia generated in the ultra-pure ammonia production line 1 with waste ammonia to prepare industrial ammonia; it includes an ammonia absorption device 3, a temperature control device 4 and a plurality of filling bottles 2, the inlet of the filling bottle is connected to the ultra-pure ammonia production line through a first pipeline 5, and the outlet of the filling bottle is connected to the ammonia absorption device through a second pipeline 6; the temperature control device is connected to the first pipeline and the second pipeline.

[0028] In the above, the ammonia absorption device is used to absorb industrial ammonia overflowing from the filling bottle.

[0029] Preferably, the temperature control device includes a cryogenic liquid supply device, a second pump and a recovery condenser 7. The cryogenic liquid supply device is used to transport cryogenic liquid to control the temperature of the first pipeline and the second pipeline. After filling, the cryogenic liquid enters the recovery condenser.

[0030] Preferably, the cryogenic liquid is nitrogen.

[0031] Preferably, the second pump is provided with an outlet reflux valve and an outlet valve, and the outlet reflux valve is used for precooling the second pump.

[0032] Preferably, a first pump and a pressure gauge are provided on the first pipeline connecting the ultrapure ammonia production line and the filling bottles; the operating frequency of the first pump is adjusted according to the number of filling bottles and the pressure gauge data.

[0033] Preferably, the first pump is provided with a pump valve and an air return valve.

[0034] Preferably, a feed valve is provided at the inlet of the filling bottle, and a discharge valve is provided at the outlet of the filling bottle.

[0035] Preferably, it also includes a safety discharge buffer tank 8, which is connected to the first pump through a pump outlet pipe, and a vent valve is provided on the pump outlet pipe; the first pipe is connected to the pump outlet pipe 9.

[0036] In the above, the working steps of the waste ammonia filling equipment are:

[0037] (I) Inspection before starting: Turn on the control power of the first pump and check whether the indicator light is working normally; check whether all components in the equipment are ready;

[0038] (ii) Start up:

[0039] (1) Open the waste ammonia discharge valve on the waste ammonia storage tank and the feed valve on the filling bottle;

[0040] (2) Open the outlet reflux valve of the second pump to precool the second pump;

[0041] (3) Open the outlet valve of the second pump and adjust the operating frequency of the first pump according to the number of bottles filled and the pressure gauge data; observe whether the second pump operates normally and check for air leakage;

[0042] (4) Slightly open the return valve of the first pump to prevent gasification in the first pump;

[0043] (III) Shutdown:

[0044] (1) Turn off the power supply of the second pump; close the waste ammonia discharge valve on the waste ammonia storage tank, the feed valve of the filling bottle, and the pumping valve of the first pump;

[0045] (2) Open the vent valve on the pump outlet pipe and discharge the liquid in the pipe into the safety discharge buffer tank.

[0046] The present application also claims protection for an ultra-pure ammonia production line, comprising a distillation tower and an adsorption tower, wherein one end of the distillation tower is connected to the adsorption tower, and the other end is connected to a waste ammonia storage tank, and the waste ammonia storage tank is connected to the waste ammonia filling equipment of the ultra-pure ammonia production line described above; the adsorption tower is used to produce electronic grade ultra-pure ammonia products.

[0047] Preferably, the waste ammonia storage tank is provided with a waste ammonia feed valve and a waste ammonia discharge valve, and the first pipeline connects the waste ammonia discharge valve with the filling bottle.

[0048] Preferably, the distillation tower comprises a first distillation tower and a second distillation tower, and the first purification tower and the second purification tower are used to remove light and heavy components respectively.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A waste ammonia filling device for an ultra-pure ammonia production line, characterized in that: Connected to the ultra-pure ammonia production line, used to charge the waste ammonia generated in the ultra-pure ammonia production line to prepare industrial ammonia; It includes an ammonia absorption device, a temperature control device and several filling bottles. The inlet of the filling bottle is connected to the ultra-pure ammonia production line through a first pipeline, and the outlet of the filling bottle is connected to the ammonia absorption device through a second pipeline; the temperature control device is connected to the first pipeline and the second pipeline.

2. The waste ammonia filling equipment for an ultrapure ammonia production line according to claim 1, characterized in that: The temperature control device includes a cryogenic liquid supply device, a second pump and a recovery condenser. The cryogenic liquid supply device is used to transport cryogenic liquid to control the temperature of the first pipeline and the second pipeline. After filling, the cryogenic liquid enters the recovery condenser.

3. The waste ammonia filling equipment for an ultrapure ammonia production line according to claim 2, characterized in that: The cryogenic liquid is nitrogen.

4. The waste ammonia filling equipment for an ultrapure ammonia production line according to claim 2, characterized in that: The second pump is provided with an outlet reflux valve and an outlet valve, and the outlet reflux valve is used for precooling the second pump.

5. The waste ammonia filling equipment for an ultrapure ammonia production line according to claim 1, characterized in that: A first pump and a pressure gauge are provided on the first pipeline connecting the ultrapure ammonia production line and the filling bottles; the operating frequency of the first pump is adjusted according to the number of filling bottles and the pressure gauge data.

6. The waste ammonia filling equipment for an ultrapure ammonia production line according to claim 5, characterized in that: The first pump is provided with a pumping valve and an air return valve.

7. The waste ammonia filling equipment for an ultrapure ammonia production line according to claim 1, characterized in that: A feed valve is provided at the inlet of the filling bottle, and a discharge valve is provided at the outlet of the filling bottle.

8. The waste ammonia filling equipment for an ultrapure ammonia production line according to claim 1, characterized in that: It also includes a safety discharge buffer tank, which is connected to the first pump through a pump outlet pipe, and a vent valve is provided on the pump outlet pipe; the first pipe is connected to the pump outlet pipe.

9. An ultrapure ammonia production line, characterized in that: It comprises a distillation tower and an adsorption tower, wherein one end of the distillation tower is connected to the adsorption tower, and the other end is connected to a waste ammonia storage tank, and the waste ammonia storage tank is connected to the waste ammonia filling equipment of the ultra-pure ammonia production line according to any one of claims 1 to 8; the adsorption tower is used to produce electronic grade ultra-pure ammonia products.

10. An ultrapure ammonia production line as claimed in claim 9, characterized in that: The waste ammonia storage tank is provided with a waste ammonia feed valve and a waste ammonia discharge valve, and the first pipeline connects the waste ammonia discharge valve with the filling bottle.

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