A structure-optimized high-efficiency ammonia water evaporator

Abstract

The utility model relates to ammonia evaporator technical field, concretely is a kind of high -efficient ammonia evaporator of structure optimization, including evaporator main part, the spiral flow guide heating tube bundle that can be inhaled heating medium is arranged at the top of evaporator main part, the spiral flow guide heating tube bundle is set in the taper of small upper big lower, the ammonia water distributor is arranged at the top of evaporator main part and located the upper of spiral flow guide heating tube bundle, the backflow component connected with the ammonia water distributor liquid inlet end is connected to the bottom of evaporator main part, the utility model can extend the heat exchange path and time of ammonia and heating medium, increase heat exchange contact area, realize the purpose of improving heat exchange sufficiency.

Description

Technical Field

[0001] This utility model relates to the field of ammonia evaporator technology, specifically a high-efficiency ammonia evaporator with optimized structure. Background Technology

[0002] Existing ammonia evaporators are mostly simple heating tanks or shell-and-tube heat exchangers, which have the following problems:

[0003] Low thermal efficiency and high steam consumption: Traditional structures have limited heat exchange area or insufficient heat exchange, resulting in low steam heat utilization and requiring a large amount of steam to be consumed. Utility Model Content

[0004] The purpose of this invention is to provide a structurally optimized, high-efficiency ammonia evaporator to solve the problems mentioned in the background section.

[0005] The technical solution of this utility model is: a high-efficiency ammonia evaporator with optimized structure, including an evaporator body, a spiral flow guiding heating tube bundle that can be introduced into the top of the evaporator body, the spiral flow guiding heating tube bundle being tapered with a smaller top and a larger bottom, an ammonia distributor located above the spiral flow guiding heating tube bundle at the top of the evaporator body, and a reflux component connected to the liquid inlet end of the ammonia distributor at the bottom of the evaporator body.

[0006] The aforementioned components achieve the following effects: Ammonia water is evenly distributed to the surface of the spiral flow-guiding heating tube bundle arranged in a cone shape (smaller at the top and larger at the bottom) via the ammonia water distributor at the top of the evaporator body. As the ammonia water flows downward along the surface of the conical tube bundle, it fully contacts the spiral flow-guiding heating tube bundle through which the heating medium is introduced, thus exchanging heat. The ammonia water that is not completely evaporated collects at the bottom of the evaporator body and is then transported back to the ammonia water distributor through the reflux component to participate in the evaporation cycle again. This prolongs the heat exchange path and time between the ammonia water and the heating medium, increases the heat exchange contact area, achieves the goal of improving the sufficiency of heat exchange, improves thermal efficiency, and reduces steam consumption.

[0007] Preferably, the spiral flow guiding heating tube bundle includes a conical spiral tube, the top end of which is connected to a water outlet pipe extending to the outside of the evaporator body, and the bottom end of which is connected to a water inlet pipe extending to the outside of the evaporator body.

[0008] The effect achieved by the above components is as follows: the heating medium is introduced into the spiral tube with a conical arrangement. The heating medium flows in from the inlet pipe and along the spiral path of the spiral tube, and finally flows out from the outlet pipe. The spiral structure of the spiral tube and the conical layout are combined to increase the flow path length of the heating medium in the spiral tube and prolong the heat exchange time. At the same time, the conical arrangement is adapted to the downward flow trajectory of ammonia water, thereby achieving the purpose of improving heat exchange efficiency and increasing the heat utilization rate of the heating medium.

[0009] Preferably, the spiral tube is provided with heat exchange fins that are evenly distributed on its exterior.

[0010] The effect achieved by the above components is as follows: through the heat exchange fins that are evenly distributed on the outside of the spiral tube and are tightly bonded to the surface of the spiral tube, the ammonia water comes into contact with the spiral tube and the heat exchange fins at the same time during the flow process, which significantly increases the heat exchange area between the spiral tube and the ammonia water, accelerates the heat transfer speed from the spiral tube to the ammonia water, achieves the purpose of enhancing the heat exchange effect, and increases the amount of ammonia water evaporation per unit time.

[0011] Preferably, the reflux assembly includes a suction pipe connected to the bottom end of the evaporator body, one end of the suction pipe is connected to a circulation pump, and a reflux pipe is connected between the circulation pump and the ammonia water distributor, with a valve on the reflux pipe.

[0012] The effect achieved by the above components is as follows: ammonia water is drawn from the bottom of the evaporator body through the suction pipe in the reflux assembly, pressurized by the circulation pump, and then transported to the ammonia water distributor through the reflux pipe. The valve can control the reflux flow rate, so that the ammonia water forms a circulation flow in the evaporator body. This ensures that the ammonia water can come into contact with the spiral flow guiding heating tube bundle multiple times for heat exchange, avoiding the heat waste caused by the direct discharge of insufficiently evaporated ammonia water, thereby achieving the goal of improving the utilization rate of ammonia water and increasing the ammonia output per unit of steam consumption.

[0013] Preferably, an ammonia outlet is provided at the top of the evaporator body, and a dilution air inlet is provided on one side of the evaporator body near the ammonia outlet.

[0014] The effects achieved by the above components are as follows: the ammonia gas generated by evaporation is discharged in a timely manner through the ammonia gas outlet at the top of the evaporator body, while dilution air is introduced into the dilution air inlet near the ammonia gas outlet. The dilution air and ammonia gas mix near the outlet and are discharged together, which effectively reduces the concentration of ammonia gas in the evaporator body, avoids the ammonia gas concentration being too high and hindering the continuous evaporation of ammonia water. At the same time, the diluted ammonia gas is easier to process in subsequent processes, thus achieving the goal of ensuring the continuity of the evaporation process and improving the stable operating efficiency of the evaporator.

[0015] Preferably, a baffle demister is provided inside the top of the evaporator body.

[0016] The effect achieved by the above components is as follows: the rising ammonia gas is intercepted by the baffle demister inside the top of the evaporator body. The ammonia water droplets entrained in the ammonia gas collide with the baffle plate and then condense and drip back into the evaporator body, reducing the amount of droplets entrained in the ammonia gas. This avoids material loss and subsequent equipment contamination caused by the discharge of ammonia water with the ammonia gas, thereby improving the utilization rate of ammonia water and the purity of ammonia gas, and increasing the amount of ammonia water effectively evaporated.

[0017] This utility model provides a structurally optimized high-efficiency ammonia evaporator, which has the following improvements and advantages compared with the prior art:

[0018] Firstly, this invention uses an ammonia water distributor at the top of the evaporator body to evenly distribute ammonia water to the surface of a spiral flow-guiding heating tube bundle arranged in a cone shape with a smaller top and a larger bottom. As the ammonia water flows downward along the surface of the conical tube bundle, it fully contacts the spiral flow-guiding heating tube bundle through which the heating medium is introduced to exchange heat. The ammonia water that is not completely evaporated collects at the bottom of the evaporator body and is then transported back to the ammonia water distributor through a reflux component to participate in the evaporation cycle again. This extends the heat exchange path and time between the ammonia water and the heating medium, increases the heat exchange contact area, achieves the purpose of improving the fullness of heat exchange, improves thermal efficiency, and reduces steam consumption.

[0019] Secondly, this invention uses heat exchange fins evenly distributed on the outside of the spiral tube to tightly bond with the surface of the spiral tube. During the flow process, the ammonia water comes into contact with the spiral tube and the heat exchange fins simultaneously, which significantly increases the heat exchange area between the spiral tube and the ammonia water, accelerates the transfer of heat from the spiral tube to the ammonia water, and achieves the purpose of enhancing the heat exchange effect. Attached Figure Description

[0020] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the spiral flow guiding heating tube bundle in this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Evaporator body; 2. Ammonia outlet; 3. Dilution air inlet; 4. Reflux assembly; 5. Ammonia water distributor; 6. Baffle demister; 7. Spiral guide heating tube bundle; 71. Spiral tube; 72. Heat exchange fins; 73. Water outlet pipe; 74. Water inlet pipe. Detailed Implementation

[0026] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0027] This utility model provides an optimized high-efficiency ammonia evaporator through improvements. The technical solution of this utility model is as follows:

[0028] In embodiments of this utility model, such as Figures 1-3 As shown, a structurally optimized high-efficiency ammonia evaporator includes an evaporator body 1, an ammonia outlet 2 at the top of the evaporator body 1, and a dilution air inlet 3 on one side of the evaporator body 1 near the ammonia outlet 2. The ammonia gas generated by evaporation is discharged in time through the ammonia outlet 2 at the top of the evaporator body 1, while dilution air is introduced through the dilution air inlet 3 near the ammonia outlet 2. The dilution air and ammonia gas mix near the outlet and are discharged together, effectively reducing the concentration of ammonia gas in the evaporator body 1, avoiding excessive ammonia concentration that hinders the continuous evaporation of ammonia water. At the same time, the diluted ammonia gas is easier to process in subsequent processes. A baffle demister 6 is installed inside the top of the evaporator body 1. The baffle demister 6 inside the top of the evaporator body 1 deflects and intercepts the rising ammonia gas. The ammonia water droplets entrained in the ammonia gas collide with the baffle plate and then condense and drip back into the evaporator body 1, reducing the amount of droplets entrained in the ammonia gas.

[0029] The top of the evaporator body 1 is equipped with a spiral guiding heating tube bundle 7 through which a heating medium can flow. The spiral guiding heating tube bundle 7 is tapered, with a smaller top and a larger bottom. An ammonia water distributor 5 is located above the spiral guiding heating tube bundle 7 at the top of the evaporator body 1. The spiral guiding heating tube bundle 7 includes a tapered spiral tube 71. The top of the spiral tube 71 is connected to an outlet pipe 73 extending to the outside of the evaporator body 1, and the bottom of the spiral tube 71 is connected to an inlet pipe 74 extending to the outside of the evaporator body 1. The heating medium is introduced through the interior of the tapered spiral tube 71, flows in from the inlet pipe 74 and along the spiral path of the spiral tube 71, and finally flows out from the outlet pipe 73. The spiral structure of the spiral tube 71, combined with the conical layout, increases the flow path length of the heating medium within the spiral tube 71, extending the heat exchange time. Simultaneously, the conical design adapts to the downward flow trajectory of ammonia water, achieving the goal of improving heat exchange efficiency. The spiral tube 71 is externally equipped with evenly distributed heat exchange fins 72. These fins are tightly bonded to the surface of the spiral tube 71, allowing the ammonia water to simultaneously contact both the spiral tube 71 and the heat exchange fins 72 during flow. This significantly increases the heat exchange area between the spiral tube 71 and the ammonia water, accelerating the transfer of heat from the spiral tube 71 to the ammonia water, thus enhancing the heat exchange effect.

[0030] The bottom of the evaporator body 1 is connected to a reflux assembly 4, which is connected to the inlet end of the ammonia water distributor 5. The reflux assembly 4 includes a suction pipe that communicates with the bottom of the evaporator body 1. One end of the suction pipe is connected to a circulation pump. A reflux pipe is connected between the circulation pump and the ammonia water distributor 5. There is a valve on the reflux pipe. Ammonia water is drawn from the bottom of the evaporator body 1 through the suction pipe in the reflux assembly 4. After being pressurized by the circulation pump, it is transported to the ammonia water distributor 5 through the reflux pipe. The valve can control the reflux flow rate, so that the ammonia water forms a circulation flow in the evaporator body 1. This ensures that the ammonia water can come into contact with the spiral flow guiding heating tube bundle 7 multiple times for heat exchange, avoiding the heat waste caused by the direct discharge of insufficiently evaporated ammonia water.

[0031] The working principle of the optimized high-efficiency ammonia evaporator provided by this utility model is as follows:

[0032] Ammonia water is transported to the ammonia water distributor 5 at the top of the evaporator body 1 through relevant pipelines. The ammonia water distributor 5 distributes the ammonia water evenly to the surface of the spiral flow guiding heating tube bundle 7 below.

[0033] The heating medium (such as hot water) enters the conical spiral tube 71 through the inlet pipe 74 at the bottom of the spiral flow heating tube bundle 7, flows along the spiral path of the spiral tube 71, releases heat in the process, and finally flows out of the outside of the evaporator body 1 from the outlet pipe 73 at the top of the spiral tube 71.

[0034] The ammonia water falling from the ammonia water distributor 5 comes into contact with the spiral tube 71 and the external heat exchange fins 72. As it flows downward along the surface of the conical spiral tube 71, it absorbs the heat transferred by the spiral tube 71, and some of the ammonia water evaporates into ammonia gas due to the heat.

[0035] The incompletely evaporated ammonia water is collected at the bottom of the evaporator body 1 and is drawn out through the suction pipe in the reflux assembly 4. After being pressurized by the circulation pump, it is transported back to the ammonia water distributor 5 through the reflux pipe. The valve on the reflux pipe can control the reflux flow rate according to the actual situation, so that this part of the ammonia water can participate in the evaporation process again.

[0036] The ammonia gas produced by evaporation flows upward. When it passes through the baffle demister 6 inside the top of the evaporator body 1, the entrained ammonia droplets are intercepted by the baffle, condense and drip back into the evaporator body 1.

[0037] The purified ammonia continues to flow upwards. At the same time, dilution air enters through the dilution air inlet 3 on one side of the evaporator body 1, near the ammonia outlet 2, and mixes with the ammonia near the outlet. Finally, the mixed gas is discharged from the ammonia outlet 2.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

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