An ammonia distillation apparatus and production method

Abstract

The present application relates to a kind of ammonia evaporator, including apron, head, communicating pipe, bottom liquid seal disc, cylinder, tray, raw material ammonia water inlet, heating wastewater inlet device, evaporator, inclined baffle, partition, vent one, vent two, microwave wastewater heating device, ammonia fractionator, ammonia gas outlet;The present application adopts the mode of indirect heating ammonia by microwave, and microwave wastewater heating device adjusts the power of microwave generator according to the wastewater outlet temperature determined by temperature sensor, with the characteristics of stable heating wastewater temperature.Microwave heating electricity can stably control temperature, solve the problem of unstable temperature of pipe furnace heating gas.Adopting communicating pipe to introduce wastewater into the bottom of cylinder, the bottom of cylinder is provided with baffle filter device, separate tar and impurities, reduce equipment blockage.

Description

TECHNICAL FIELD

[0001] The present application relates to wastewater treatment equipment, in particular to an ammonia evaporation device. BACKGROUND

[0002] Coking wastewater has the characteristics of high ammonia and phenol content and poor biodegradability, which is the difficulty and focus in the field of industrial wastewater. It usually needs to go through the steps of oil removal by air flotation, solvent dephenolization, wastewater ammonia evaporation, biochemical treatment, etc. before it can be discharged. The steps before biochemical treatment are collectively referred to as pretreatment, and biochemical treatment is sensitive to the ammonia nitrogen content and phenol content after pretreatment. The only process in the pretreatment that controls the ammonia nitrogen index is the ammonia evaporation process, so ammonia evaporation is a key step in wastewater treatment.

[0003] The conventional ammonia evaporation process mainly includes direct steam ammonia evaporation process, heat conduction oil method ammonia evaporation process, tubular furnace method ammonia evaporation process, and steam reboiler method ammonia evaporation process. The direct steam ammonia evaporation process is that steam is directly introduced from the bottom of the ammonia evaporation tower, and after condensation, it is discharged together with the tower kettle wastewater. The ammonia evaporation process not only does not form wastewater reduction, but also increases about 20% ammonia evaporation wastewater, which has low energy efficiency and increases the burden of subsequent biochemical treatment. The direct steam ammonia evaporation process has low tower efficiency, high energy consumption, high cost, and heavy environmental pollution. The heat conduction oil method ammonia evaporation process uses an indirect heating ammonia evaporation reboiler to supply heat to the ammonia evaporation tower, and the reboiler is heated by heat conduction oil. The heat conduction oil is heated in a heat conduction oil furnace, pumped to the reboiler by a heat oil pump, and then recycled for use after being heated by the tower kettle wastewater circulation. The disadvantages are high investment and waste gas generated by the heat conduction oil heating furnace. The tubular furnace method ammonia evaporation process is that the tower kettle wastewater is pumped to the tubular furnace for heating, and the generated vapor-liquid mixture is returned to the tower to produce steam as the heat source of the ammonia evaporation tower. The disadvantages are high investment and waste gas generated by the ammonia evaporation tubular furnace heating furnace. The steam reboiler method ammonia evaporation process uses steam to indirectly heat the ammonia evaporation reboiler to supply heat to the ammonia evaporation tower, reducing the ammonia evaporation wastewater of direct steam. The disadvantages are high investment and unstable steam temperature, which affects the ammonia evaporation operation. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an ammonia evaporation device that uses microwave indirect heating for ammonia evaporation, and the equipment is stable and reliable in production.

[0005] To achieve the above-mentioned purpose, the following technical solutions are adopted in the present application:

[0006] An ammonia evaporation device, comprising a skirt, a head, a communication pipe, a bottom liquid seal disc, a cylinder, a tray, an original ammonia water inlet, a heating wastewater inlet device, an evaporator, an inclined baffle, a partition, a vent one, a vent two, a microwave wastewater heating device, an ammonia splitter, and an ammonia gas outlet.

[0007] The tray is arranged at the upper part of the cylinder, the raw material ammonia water inlet is arranged at the upper part of the tray, the ammonia distributor is arranged above the tray, the heating wastewater inlet device is arranged below the tray, the evaporator is arranged below the heating wastewater inlet device, the bottom layer of the tray is connected with the bottom liquid seal plate between the cylinder, the top of the communication pipe is connected with the cylinder on the upper side of the bottom liquid seal plate, and the bottom is connected with the bottom of the cylinder, the heating wastewater inlet device is connected with the microwave wastewater heating device, the microwave wastewater heating device comprises a heating controller, a microwave generator, a microwave waveguide adapter, a temperature sensor, an anti-vortex baffle, a wastewater outlet pipe, a wastewater pump, a tank body and a wastewater supply pipe.

[0008] The microwave generator is a power-adjustable microwave generator.

[0009] The evaporator comprises a flow guide groove, a support ring plate, a half-ring vertical plate, a water tank and a hole plate, the support ring plate is connected with the inner wall of the cylinder, the upper surface of the support ring plate is symmetrically connected with the half-ring vertical plate, the water tank is arranged between the two half-ring vertical plates, the two ends of the water tank are connected with the inner wall of the cylinder, a half-ring water tank is formed between the water tank, the half-ring vertical plate and the inner wall of the cylinder, a plurality of overflow openings are arranged on the two side walls of the water tank, the flow guide groove is connected between the outer side of the overflow opening and the half-ring vertical plate, the half-ring vertical plate is provided with a flow guide opening corresponding to the flow guide groove, a plurality of hole plates are arranged between the two side walls of the water tank and below the overflow openings, and the top of the flow guide groove and the half-ring vertical plate is flush with the upper edge of the overflow opening.

[0010] The heating wastewater inlet device comprises a main pipe, a branch pipe, a flange and a support, the main pipe is connected with the wastewater supply pipe of the microwave wastewater heating device by bolts, the main pipe is supported in the cylinder by the support, the branch pipe is arranged above the hole plate of the evaporator, and the number of the branch pipe is consistent with that of the hole plate.

[0011] The skirt is connected with the cylinder, the upper and lower parts of the cylinder are connected with the head, and the ammonia gas outlet is arranged at the top end of the cylinder.

[0012] The tray is a bubble cap tray, a vertical sieve plate or an inclined hole tray.

[0013] The ammonia distributor is a fixed tube plate heat exchanger.

[0014] The production method of the ammonia distillation device adopts microwave indirect heating for ammonia distillation, and specifically, raw ammonia water sent from a tank area is preheated and added with alkali, and then enters an upper part of a cylinder through a raw ammonia water inlet, falls through a tray, and uses steam at a bottom as a heat source to distill free ammonia in the ammonia water; the distilled ammonia gas is condensed through an ammonia condenser at a top to obtain product ammonia gas; condensed liquid generated by the ammonia condenser is directly returned to the cylinder as reflux liquid; waste water after ammonia distillation flows into a bottom of the cylinder through a communication pipe at a liquid seal disc; waste water containing tar and impurities is separated and filtered through a baffle at the bottom of the cylinder, and flows to the right side of the baffle, is blocked by an anti-vortex baffle, is pumped out by a waste water pump, and enters a microwave waste water heating device; the tar and impurities are discharged through vent ports one and two; the microwave waste water heating device adopts microwave heating, and the waste water is heated to 120-130 DEG C; a temperature sensor measures an outlet temperature of the waste water; a heating controller adjusts a power of a microwave generator according to the outlet temperature of the waste water to keep the heating temperature; the heated waste water is sent to the cylinder through a heated waste water inlet device; the waste water under pressure flows to a water tank through a perforated plate; then the waste water flows to a guide groove through an overflow port; and then the waste water flows to a semicircular water tank through a guide port, so that the waste water under pressure is depressurized and flashed, and the waste water distributed on the evaporator flows downward from gaps between the guide grooves; the steam generated by the flashing is in contact with the raw ammonia water in a reverse direction from the bottom of the tray upward to complete the ammonia distillation; and the atomized liquid generated by the flashing flows downward into the bottom of the cylinder by gravity.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. The present application adopts the microwave indirect heating for ammonia distillation, the microwave waste water heating device adjusts the power of the microwave generator according to the outlet temperature of the waste water measured by the temperature sensor, and has the characteristics of stable heating temperature of the waste water. The microwave heating can stably control the temperature, and solves the problem of unstable temperature of the pipe furnace heating gas. The oil-rich heater is also affected by the unstable steam in winter and summer.

[0017] 2. The waste water flashing method is adopted to provide the ammonia distillation steam, which is stable and reliable.

[0018] 3. The waste water is introduced into the bottom of the cylinder through the communication pipe, the baffle filtering device is arranged at the bottom of the cylinder to separate the tar and impurities, and the equipment blockage is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present application.

[0020] Figure 2 It is a structural schematic diagram of the evaporator.

[0021] Figure 3 It is a top view of the evaporator.

[0022] Figure 4 It is a connection schematic diagram of the water tank and the guide groove.

[0023] Figure 5 For Figure 3 Enlarged view at A in the figure.

[0024] Figure 6 For the schematic diagram of the hole plate.

[0025] Figure 7 For the schematic diagram of the heating wastewater inlet device.

[0026] In the figure: skirt 1, head 2, cylinder manhole 3, communication pipe 4, bottom liquid seal disc 5, cylinder 6, tray 7, raw material ammonia water inlet 8, heating wastewater inlet device 9, evaporator 10, inclined baffle 11, partition manhole 12, partition 13, vent one 14, vent two 15, microwave wastewater heating device 16, ammonia decomposer 17, ammonia gas outlet 18, heating controller 31, microwave generator 32, microwave waveguide adapter 33, temperature sensor 34, anti-vortex baffle 35, wastewater outlet pipe 36, wastewater pump 37, wastewater supply pipe 38, tank manhole 39, tank 40, flow guide groove 51, support ring plate 52, half-ring vertical plate 53, water tank 54, hole plate 55, half-circle ring water tank 56, overflow 57, flow guide 58, main pipe 61, branch pipe 62, flange 63, support 64. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] As Figures 1-7 An ammonia evaporation device, comprising a skirt 1, a head 2, a communication pipe 4, a bottom liquid seal plate 5, a cylinder 6, a tray 7, an ammonia water inlet 8, a heating wastewater inlet device 9, an evaporator 10, an inclined baffle 11, a partition plate 13, a vent hole 14, a vent hole 15, a microwave wastewater heating device 16, an ammonia distributor 17, an ammonia gas outlet 18.

[0031] The tray 7 is arranged at the upper part of the cylinder 6, the raw ammonia water inlet 8 is arranged at the upper part of the tray 7, the ammonia distributor 17 is arranged above the tray 7, the heating wastewater inlet device 9 is arranged below the tray 7, the evaporator 10 is arranged below the heating wastewater inlet device 9, the bottom layer of the tray 7 is connected with the cylinder 6 through the bottom liquid seal plate 5, the top of the communication pipe 4 is connected with the upper side of the cylinder 6 of the bottom liquid seal plate 5, and the bottom is connected with the bottom of the cylinder 6, the heating wastewater inlet device 9 is connected with the microwave wastewater heating device 16, the microwave wastewater heating device 16 comprises a heating controller 31, a microwave generator 32, a microwave waveguide adapter 33, a temperature sensor 34, an anti-vortex baffle 35, a wastewater outlet pipe 36, a wastewater pump 37, a tank 40, a wastewater supply pipe 38, the top of the tank 40 is connected with the wastewater supply pipe 38, the wastewater supply pipe 38 is connected with the heating wastewater inlet device 9, the bottom of the tank 40 is connected with the wastewater outlet pipe 36, the wastewater outlet pipe 36 is connected with the bottom of the cylinder 6, the pipe end of the wastewater outlet pipe 36 in the cylinder 6 is provided with the anti-vortex baffle 35, the wastewater outlet pipe 36 is provided with the wastewater pump 37, a plurality of microwave waveguide adapters 33 are connected on the outer wall of the tank 40, the microwave waveguide adapters 33 are connected with the microwave generator 32, the temperature sensor 34 is arranged in the wastewater supply pipe 38, the microwave generator 32 and the temperature sensor 34 are connected with the heating controller 31, the tank 40 is provided with a tank manhole 39, the bottom of the cylinder 6 is provided with the partition plate 13, the bottom of the partition plate 13 is welded with the head 2, the two sides of the partition plate 13 are respectively provided with the vent hole 14 and the vent hole 15, the partition plate 13 is provided with the inclined baffle 11 above, the inclined baffle 11 is welded with the cylinder 6, the low end of the inclined baffle 11 exceeds the top of the partition plate 13 and extends to the center of the cylinder 6. The partition plate 13 is provided with a partition plate manhole 12. A plurality of cylinder manholes 3 are arranged on the cylinder 6.

[0032] The microwave generator 32 is a power-adjustable microwave generator.

[0033] The evaporator 10 comprises a flow guide groove 51, a support ring plate 52, a half-ring vertical plate 53, a water tank 54, a hole plate 55, the support ring plate 52 is connected with the inner wall of the cylinder 6, the upper surface of the support ring plate 52 is symmetrically connected with the half-ring vertical plate 53, the water tank 54 is arranged between the two half-ring vertical plates 53, the two ends of the water tank 54 are respectively connected with the inner wall of the cylinder 6, the water tank 54 and the half-ring vertical plate 53 form a semicircular ring water tank 56 with the inner wall of the cylinder, a plurality of overflow ports 57 are arranged on the two side walls of the water tank 54, the overflow ports 57 are connected with the flow guide groove 51 between the outer side and the half-ring vertical plate 53, the half-ring vertical plate 53 is provided with a flow guide port 58 corresponding to the flow guide groove 54, a plurality of hole plates 55 are arranged between the two side walls of the water tank 54, a plurality of small holes are arranged on the hole plate 55, the hole plate 55 is arranged below the overflow port 57, and the top of the flow guide groove 51 and the half-ring vertical plate 53 is flush with the upper edge of the overflow port 57.

[0034] The heating wastewater inlet device 9 comprises a main pipe 61, a branch pipe 62, a flange 63 and a support 64, the main pipe 61 is bolted with the wastewater supply pipe 38 of the microwave wastewater heating device 16, the main pipe 61 is supported in the cylinder through the support 64, the branch pipe 62 is located directly above the hole plate 55 of the evaporator 10, and the number of the branch pipe 62 is consistent with that of the hole plate 55.

[0035] The skirt 1 is connected with the cylinder 6, the upper and lower parts of the cylinder are respectively connected with the end cover 41, and the ammonia gas outlet 18 is arranged at the top end of the cylinder 6.

[0036] The tray 7 is a bubble cap tray, a vertical sieve plate or an inclined hole tray.

[0037] The ammonia decomposer 17 is a fixed tube plate heat exchanger.

[0038] The production method of the ammonia distilling device adopts microwave indirect heating to distill ammonia, and specifically, the raw ammonia water sent from the tank area is preheated and added with alkali, and then enters the upper part of the cylinder 6 through the raw ammonia water inlet 8, falls through the tray, and the steam at the bottom is used as a heat source to distill the free ammonia in the ammonia water. The distilled ammonia gas is condensed through the ammonia condenser 7 at the top to obtain the product ammonia gas. The condensed liquid generated by the ammonia condenser 7 is directly returned to the cylinder as reflux liquid. The waste water after ammonia distillation flows into the bottom of the cylinder 6 through the communication pipe 4 at the liquid seal plate 5. The waste water containing tar and impurities is separated and filtered at the bottom of the cylinder 6 through the partition plate 13, flows to the right side of the partition plate 13, is prevented from forming vortex by the vortex prevention baffle 35, is pumped out by the waste water pump 37, enters the microwave waste water heating device 16, and the tar and impurities are discharged through the vent port one 14 and the vent port 15. The microwave waste water heating device 16 adopts microwave heating, the waste water is heated to 120-130 DEG C, the temperature sensor 34 measures the outlet temperature of the waste water, the heating controller 31 adjusts the power of the microwave generator to keep the heating temperature according to the outlet temperature of the waste water, and the heated waste water is sent to the cylinder through the heated waste water inlet device 9. The waste water under pressure flows to the water tank 54 through the perforated plate 55, flows to the guide groove through the overflow port, then flows to the semicircular ring water tank 56 through the guide port 58, realizes pressure reduction flash evaporation of the waste water under pressure, and the waste water distributed on the evaporator 10 flows downward from the gap between the guide grooves. The flash evaporation generated steam is in contact with the raw ammonia water in the opposite direction from the bottom of the tray to complete the ammonia distillation, and the atomized liquid flows downward into the bottom of the cylinder by gravity.

[0039] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the specific details in the above-described embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application. In addition, it should be noted that, in the above-described specific embodiments, various specific technical features can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application will not describe various possible combinations again. Furthermore, various different embodiments of the present application can also be combined in any appropriate manner, as long as they do not deviate from the technical concept of the present application, and they should also be considered as disclosed content of the present application.

[0040] To make the purpose, technical solutions and technical effects of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely. However, the embodiments described below are only some of the embodiments of the present application, not all the embodiments. In combination with the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0041] Embodiment 1

[0042] An ammonia distillation device comprises a skirt 1, a head 2, a communication pipe 4, a bottom liquid seal plate 5, a cylinder 6, a tray 7, an ammonia water inlet 8, a heating wastewater inlet device 9, an evaporator 10, an inclined baffle 11, a partition plate 13, a vent hole 14, a vent hole 15, a microwave wastewater heating device 16, an ammonia distributor 17, and an ammonia gas outlet 18.

[0043] The tray 7 is a bubble cap tray arranged at the upper portion of the cylinder 6, the ammonia water inlet 8 is arranged at the upper portion of the tray, the ammonia distributor 17 is arranged above the tray 7, and the ammonia distributor 17 is a fixed tube plate heat exchanger.

[0044] The heating wastewater inlet device 9 is arranged below the tray 7, the evaporator is arranged below the heating wastewater inlet device 9, the bottom liquid seal plate 5 is connected between the bottom layer of the tray 7 and the cylinder 6, the top portion of the communication pipe 4 is connected to the upper side of the cylinder 6 of the bottom liquid seal plate 5, and the bottom is connected to the bottom of the cylinder 6, the heating wastewater inlet device 9 is connected to the microwave wastewater heating device 16, the microwave wastewater heating device 16 comprises a heating controller 31, a microwave generator 32, a microwave waveguide adapter 33, a temperature sensor 34, an anti-vortex baffle 35, a wastewater outlet pipe 36, a wastewater pump 37, a tank body 40, and a wastewater supply pipe 38, the top portion of the tank body 40 is connected to the wastewater supply pipe 38, the wastewater supply pipe 38 is connected to the heating wastewater inlet device 9, the bottom of the tank body 40 is connected to the wastewater outlet pipe 36, the wastewater outlet pipe 36 is connected to the bottom of the cylinder 6, the pipe end of the wastewater outlet pipe 36 in the cylinder 6 is provided with the anti-vortex baffle 35, the wastewater outlet pipe 36 is provided with the wastewater pump 37, a plurality of microwave waveguide adapters 33 are connected to the outer wall of the tank body 40, the microwave waveguide adapters 33 are connected to the microwave generator 32, the temperature sensor 34 is arranged in the wastewater supply pipe 38, the microwave generator 32 and the temperature sensor 34 are connected to the heating controller 31, the tank body 40 is provided with a tank manhole 39, the bottom of the cylinder 6 is provided with the partition plate 13, the bottom of the partition plate 13 is welded to the head, the two sides of the partition plate 13 are respectively provided with the vent hole 14 and the vent hole 15, the inclined baffle 11 is arranged above the partition plate 13, the inclined baffle 11 is welded to the cylinder 6, the low end of the inclined baffle 11 exceeds the top portion of the partition plate 13 and extends to the center of the cylinder 6, the partition plate 13 is provided with a partition plate manhole 12, and the cylinder 6 is provided with three cylinder manholes 3.

[0045] The microwave generator 32 is a power-adjustable microwave generator.

[0046] The evaporator 10 comprises a flow guide groove 51, a support ring plate 52, a half-ring vertical plate 53, a water tank 54, and a hole plate 55. The support ring plate 52 is connected with the inner wall of the cylinder 6. The upper surface of the support ring plate 52 is symmetrically connected with the half-ring vertical plate 53. The water tank 54 is arranged between the two half-ring vertical plates 53. The two ends of the water tank 54 are respectively connected with the inner wall of the cylinder 6. The water tank 54 and the half-ring vertical plate 53 form a semi-circular ring water tank 56 with the inner wall of the cylinder. Nine overflow ports 57 are arranged on the two side walls of the water tank 54. The overflow ports 57 are connected with the flow guide groove 51 between the outer side of the overflow port 57 and the half-ring vertical plate 53. The half-ring vertical plate 53 is provided with a flow guide port 58 corresponding to the flow guide groove 54. A plurality of hole plates 55 are arranged between the two side walls of the water tank 54. The hole plate 55 is provided with 28 small holes. The hole plate 55 is arranged below the overflow port 57. The top of the flow guide groove 51 and the half-ring vertical plate 53 are flush with the upper edge of the overflow port 57.

[0047] The heating wastewater inlet device 9 comprises a main pipe 61, a branch pipe 62, a flange 63, and a support 64. The main pipe 61 is bolted with the wastewater supply pipe 38 of the microwave wastewater heating device 16. The main pipe 61 is supported in the cylinder through the support 64. The branch pipe 62 is located directly above the hole plate 55 of the evaporator 10. The number of the branch pipe 62 is consistent with that of the hole plate 55.

[0048] A production method of an ammonia evaporation device is disclosed. Raw ammonia water from a tank area is preheated and added with alkali, and then enters the upper part of the cylinder 6 through the raw ammonia water inlet 8. The ammonia water falls through the tray. The steam at the bottom is used as a heat source to evaporate the free ammonia in the ammonia water. The evaporated ammonia gas is condensed through the ammonia condenser 7 at the top to obtain product ammonia gas. The condensate produced by the ammonia condenser 7 directly flows back into the cylinder as reflux liquid. The wastewater after ammonia evaporation flows into the bottom of the cylinder 6 through the communication pipe 4 at the liquid seal tray 5. The wastewater containing tar and impurities is separated and filtered at the bottom of the cylinder 6 through the partition plate 13, and then flows to the right side of the partition plate 13. The wastewater is pumped out by the wastewater pump 37 through the anti-vortex baffle 35, and then enters the microwave wastewater heating device 16. The tar and impurities are discharged through the vent port 1 and the vent port 2. The microwave wastewater heating device 16 uses microwave heating. The wastewater is heated to 123°C. The temperature sensor 34 measures the outlet temperature of the wastewater. The heating controller 31 adjusts the power of the microwave generator to maintain the heating temperature according to the outlet temperature of the wastewater. The heated wastewater is sent into the cylinder through the heating wastewater inlet device 9. The pressurized wastewater flows into the water tank 54 through the hole plate 55, and then flows into the flow guide groove through the overflow port. Then, the wastewater flows into the semi-circular ring water tank 56 through the flow guide port 58. The pressurized wastewater is depressurized and flashed. The wastewater distributed on the evaporator 10 flows downward from the gap between the flow guide grooves. The steam produced by the flashing is in contact with the raw ammonia water in the opposite direction to complete the ammonia evaporation. The atomized liquid flows downward into the bottom of the cylinder by gravity.

[0049] Example 2

[0050] An ammonia distilling device comprises a skirt 1, a head 2, a communication pipe 4, a bottom liquid seal plate 5, a cylinder 6, a tray 7, a raw ammonia water inlet 8, a heating waste water inlet device 9, an evaporator 10, an inclined baffle 11, a partition plate 13, a vent hole 14, a vent hole 15, a microwave waste water heating device 16, an ammonia splitter 17, and an ammonia gas outlet 18.

[0051] The tray 7 is an inclined hole tray, which is arranged at the upper part of the cylinder 6, and the raw ammonia water inlet 8 is arranged at the upper part of the tray 7. The ammonia splitter 17 is arranged above the tray 7, and the ammonia splitter 17 is a fixed tube plate heat exchanger.

[0052] The heating waste water inlet device 9 is arranged below the tray 7, and the evaporator is arranged below the heating waste water inlet device 9. The bottom layer of the tray 7 is connected with the cylinder 6 through the bottom liquid seal plate 5. The top part of the communication pipe 4 is connected with the cylinder 6 at the upper side of the bottom liquid seal plate 5, and the bottom part is connected with the bottom part of the cylinder 6. The heating waste water inlet device 9 is connected with the microwave waste water heating device 16. The microwave waste water heating device 16 comprises a heating controller 31, a microwave generator 32, a microwave waveguide adapter 33, a temperature sensor 34, an anti-vortex baffle 35, a waste water outlet pipe 36, a waste water pump 37, a tank 40, and a waste water supply pipe 38. The top part of the tank 40 is connected with the waste water supply pipe 38, the waste water supply pipe 38 is connected with the heating waste water inlet device 9, the bottom part of the tank 40 is connected with the waste water outlet pipe 36, the waste water outlet pipe 36 is connected with the bottom part of the cylinder 6, the pipe end of the waste water outlet pipe 36 in the cylinder 6 is provided with the anti-vortex baffle 35, the waste water outlet pipe 36 is provided with the waste water pump 37, a plurality of microwave waveguide adapters 33 are connected with the outer wall of the tank 40, the microwave waveguide adapters 33 are connected with the microwave generator 32, the waste water supply pipe 38 is provided with the temperature sensor 34, the microwave generator 32 and the temperature sensor 34 are connected with the heating controller 31, the tank 40 is provided with a tank manhole 39, the bottom part of the cylinder 6 is provided with the partition plate 13, the bottom part of the partition plate 13 is welded with the head, the two sides of the partition plate 13 are respectively provided with the vent hole 14 and the vent hole 15, the partition plate 13 is provided with the inclined baffle 11 above, the inclined baffle 11 is welded with the cylinder 6, the low end of the inclined baffle 11 exceeds the top part of the partition plate 13 and extends to the center of the cylinder 6. The partition plate 13 is provided with a partition plate manhole 12. The cylinder 6 is provided with three cylinder manholes 3.

[0053] The microwave generator 32 is a power adjustable microwave generator.

[0054] The evaporator 10 comprises a flow guide groove 51, a support ring plate 52, a half-ring vertical plate 53, a water tank 54, and a hole plate 55. The support ring plate 52 is connected with the inner wall of the cylinder 6. The upper surface of the support ring plate 52 is symmetrically connected with the half-ring vertical plate 53. The water tank 54 is arranged between the two half-ring vertical plates 53. The two ends of the water tank 54 are respectively connected with the inner wall of the cylinder 6. The water tank 54 and the half-ring vertical plate 53 form a semi-circular ring water tank 56 with the inner wall of the cylinder. Nine overflow ports 57 are arranged on the two side walls of the water tank 54. The overflow ports 57 are connected with the flow guide groove 51 between the outer side of the overflow port 57 and the half-ring vertical plate 53. The half-ring vertical plate 53 is provided with a flow guide port 58 corresponding to the flow guide groove 54. A plurality of hole plates 55 are arranged between the two side walls of the water tank 54. The hole plate 55 is provided with 36 small holes. The hole plate 55 is arranged below the overflow port 57. The top of the flow guide groove 51 and the half-ring vertical plate 53 are flush with the upper edge of the overflow port 57.

[0055] The heating wastewater inlet device 9 comprises a main pipe 61, a branch pipe 62, a flange 63, and a support 64. The main pipe 61 is bolted with the wastewater supply pipe 38 of the microwave wastewater heating device 16. The main pipe 61 is supported in the cylinder through the support 64. The branch pipe 62 is located directly above the hole plate 55 of the evaporator 10. The number of the branch pipe 62 is consistent with that of the hole plate 55.

[0056] A production method of an ammonia evaporation device, which adopts microwave indirect heating for ammonia evaporation. Specifically, the raw ammonia water delivered from a tank area is preheated and added with alkali, and then enters the upper part of the cylinder 6 through the raw ammonia water inlet 8. The ammonia water falls through the tray. The steam at the bottom serves as a heat source to evaporate the free ammonia in the ammonia water. The evaporated ammonia gas is condensed through the ammonia condenser 7 at the top to obtain product ammonia gas. The condensate generated by the ammonia condenser 7 directly flows back into the cylinder as reflux liquid. The wastewater after ammonia evaporation flows into the bottom of the cylinder through the communication pipe 4 at the liquid seal tray 5. The wastewater containing tar and impurities is separated and filtered at the bottom of the cylinder 6 through the partition plate 13, and then flows to the right side of the partition plate 13. The wastewater is pumped out by the wastewater pump 37 through the anti-vortex baffle 35, and then enters the microwave wastewater heating device 16. The tar and impurities are discharged through the vent port 1 4 and the vent port 15. The microwave wastewater heating device 16 adopts microwave heating. The wastewater is heated to 126℃. The temperature sensor 34 measures the temperature of the wastewater outlet. The heating controller 31 adjusts the power of the microwave generator to maintain the heating temperature according to the temperature of the wastewater outlet. The heated wastewater is sent to the cylinder through the heating wastewater inlet device 9. The pressurized wastewater flows into the water tank 54 through the hole plate 55, and then flows into the flow guide groove through the overflow port, and then flows into the semi-circular ring water tank 56 through the flow guide port 58, so as to realize the pressure reduction flash evaporation of the pressurized wastewater. The wastewater distributed on the evaporator 10 flows downward from the gap between the flow guide grooves. The flash evaporation generated steam is in contact with the raw ammonia water in the opposite direction from the bottom of the tray to complete the ammonia evaporation. The atomized liquid flows into the bottom of the cylinder by gravity.

[0057] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. An ammonia distillation apparatus, characterized by, The skirt, the head, the communication pipe, the bottom liquid seal disc, the cylinder, the tray, the raw material ammonia water inlet, the heating wastewater inlet device, the evaporator, the inclined baffle, the partition, the vent one, the vent two, the microwave wastewater heating device, the ammonia distributor, the ammonia gas outlet; The tray is arranged at the upper portion of the cylinder, the raw material ammonia water inlet is arranged at the upper portion of the tray, the ammonia distributor is arranged above the tray, the heating wastewater inlet device is arranged below the tray, the evaporator is arranged below the heating wastewater inlet device, the bottom liquid seal disc is arranged between the bottom layer of the tray and the cylinder, the top of the communication pipe is connected with the cylinder on the upper side of the bottom liquid seal disc, the bottom of the communication pipe is connected with the bottom of the cylinder, the heating wastewater inlet device is connected with the microwave wastewater heating device, the microwave wastewater heating device comprises a heating controller, a microwave generator, microwave waveguide adapters, a temperature sensor, an anti-vortex baffle, a wastewater outlet pipe, a wastewater pump, a tank, a wastewater supply pipe, the top of the tank is connected with the wastewater supply pipe, the wastewater supply pipe is connected with the heating wastewater inlet device, the bottom of the tank is connected with the wastewater outlet pipe, the wastewater outlet pipe is connected with the bottom of the cylinder, the pipe end of the wastewater outlet pipe in the cylinder is provided with the anti-vortex baffle, the wastewater outlet pipe is provided with the wastewater pump, a plurality of microwave waveguide adapters are connected with the outer wall of the tank, the microwave waveguide adapters are connected with the microwave generator, the wastewater supply pipe is provided with the temperature sensor, the microwave generator and the temperature sensor are connected with the heating controller, the bottom of the cylinder is provided with the partition, the bottom of the partition is welded with the head, the two sides of the partition are respectively provided with the vent one and the vent two, the inclined baffle is arranged above the partition and welded with the cylinder, the low end of the inclined baffle exceeds the top of the partition and extends to the center of the cylinder; The heating wastewater inlet device comprises a main pipe, a branch pipe, a flange and a support, the main pipe is bolted with the wastewater supply pipe of the microwave wastewater heating device, the main pipe is supported in the cylinder by the support, the branch pipe is located directly above the orifice plate of the evaporator, and the number of the branch pipe is consistent with that of the orifice plate. The evaporator comprises a flow guide groove, a support ring plate, a half-ring vertical plate, a water tank and an orifice plate, the support ring plate is connected with the inner wall of the cylinder, the upper surface of the support ring plate is symmetrically connected with the half-ring vertical plate, the water tank is arranged between the two half-ring vertical plates, the two ends of the water tank are respectively connected with the inner wall of the cylinder, the water tank, the half-ring vertical plate and the inner wall of the cylinder form a semicircular ring water tank, a plurality of overflow openings are arranged on the two side walls of the water tank, the flow guide groove is connected between the outer side of the overflow opening and the half-ring vertical plate, the half-ring vertical plate is provided with a flow guide opening corresponding to the flow guide groove, a plurality of orifice plates are arranged between the two side walls of the water tank, the orifice plates are arranged below the overflow openings, and the top of the flow guide groove and the half-ring vertical plate is flush with the upper edge of the overflow opening.

2. An ammonia still according to claim 1, characterized in that The microwave generator is a power-adjustable microwave generator.

3. An ammonia still according to claim 1, characterized in that The skirt is connected with the cylinder, the cylinder is connected with the head at the top and the bottom, and the ammonia gas outlet is arranged at the top end of the cylinder.

4. An ammonia still according to claim 1, characterized in that The tray is a bubble cap tray, a vertical sieve plate or an inclined hole tray.

5. An ammonia still according to claim 1, wherein The ammonia distributor is a fixed tube plate heat exchanger.

6. The method of claim 1, wherein the ammonia vapor device is produced by the steps of: The ammonia is evaporated by indirect heating of microwave, specifically, the raw ammonia water sent from the tank area is preheated and added with alkali, and then enters the upper part of the cylinder through the raw ammonia water inlet, falls through the tray, and the steam at the bottom is used as heat source to evaporate the free ammonia in the ammonia water, the evaporated ammonia gas is condensed through the ammonia separator at the top to obtain the product ammonia gas, the condensed liquid produced by the ammonia separator is directly returned to the cylinder as reflux liquid, the waste water after ammonia evaporation flows into the bottom of the cylinder through the communication pipe at the bottom liquid seal plate, the waste water containing tar and impurities is separated and filtered at the bottom of the cylinder through the partition, and flows to the right side of the partition, and then is pumped out by the waste water pump, enters the microwave waste water heating device, and the tar and impurities are discharged through vent port one and vent port two, the microwave waste water heating device uses microwave heating, the waste water is heated to 120-130 DEG C, the waste water outlet temperature is measured by a temperature sensor, the microwave generator power is adjusted by a heating controller according to the waste water outlet temperature to keep the heating temperature, the heated waste water is sent to the cylinder through the heated waste water inlet device, the pressurized waste water flows to the water tank through the perforated plate, and then flows to the guide groove through the overflow port, and then flows to the semicircular water tank through the guide port, so that the pressurized waste water is depressurized and flashed, the waste water distributed on the evaporator flows downward from the gap between the guide grooves, the steam produced by the flash evaporation is contacted with the raw ammonia water in the opposite direction from the bottom of the tray upward to complete the ammonia evaporation, and the atomized liquid produced is flowed downward into the bottom of the cylinder by gravity.

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