Multistage cooling device of carbonization system
By designing a multi-stage cooling device and a reflux pump, the problems of pipe blockage and product decomposition caused by improper temperature control in ammonium bicarbonate production were solved, achieving efficient temperature management and improved product quality.
Patent Information
- Application Number
- CN202520414651.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-10
AI Technical Summary
During the production of ammonium bicarbonate, the exothermic reaction and crystallization processes cause a rapid increase in temperature, which can easily lead to pipe blockage and a decline in product quality. Furthermore, ammonium bicarbonate is prone to decomposition.
A multi-stage cooling system is adopted, including a carbonization tank, a cooling heat exchanger, and a preheating heat exchanger. Temperature is controlled through multi-stage cooling and reflux pumps to avoid rapid cooling, prevent crystallization and adhesion, and improve product quality and reaction efficiency.
Effective temperature control prevents pipe blockage, improves product quality and reaction efficiency, enhances heat exchange efficiency, and avoids the decomposition of ammonium bicarbonate.
Smart Images
Figure CN223925240U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to ammonium bicarbonate production technical field, concretely relates to a carbonization system multistage cooling device. BACKGROUND
[0002] In the production of ammonium bicarbonate, mainly through ammonia and carbon dioxide in carbonization jar reaction, the reaction process exists reaction heat release and crystallization heat release, make the temperature in carbonization jar rise, and crystallization is faster, the faster temperature rises.
[0003] Ammonium bicarbonate is usually white crystal, has ammonia smell, can dissolve in water, its characteristic is at different temperature, solubility is different, solubility is smaller when temperature is lower, the higher temperature, the higher solubility is, but it is easy to decompose under heat, will decompose completely at 65 DEG C.
[0004] Because the reaction obtained is ammonium bicarbonate slurry, ammonium bicarbonate is granular and if rapid cooling, can lead to crystallization to accelerate, and be cemented on the inner surface of pipeline or cooler, cause pipeline blockage. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the prior art's insufficient, provide a carbonization system multistage cooling device.
[0006] The technical scheme of the utility model is as follows:
[0007] A carbonization system multistage cooling device, including carbonization jar, first cooling heat exchanger, second cooling heat exchanger and preheating heat exchanger, the carbonization jar is used for ammonia and carbon dioxide reaction generation ammonium bicarbonate slurry, the upper portion of carbonization jar is equipped with ammonia inlet, the middle part of carbonization jar is equipped with carbon dioxide inlet, the lower part of carbonization jar is equipped with ammonium bicarbonate outlet, first cooling heat exchanger and second cooling heat exchanger are opposite and are arranged, the hot stream import of first cooling heat exchanger is connected with the lower part of carbonization jar through first hot stream pipeline, the hot stream export of first cooling heat exchanger is connected with the upper portion of carbonization jar through second hot stream pipeline, the hot stream import of second cooling heat exchanger is connected with the lower part of carbonization jar through third hot stream pipeline, the hot stream export of second cooling heat exchanger is connected with the upper portion of carbonization jar through fourth hot stream pipeline, the ammonium bicarbonate outlet of carbonization jar is exported through preheating heat exchanger through discharge pipeline, the both sides of preheating heat exchanger are equipped with first heat exchange chamber and second heat exchange chamber respectively, the heat exchange import of first heat exchange chamber is connected with first hot stream pipeline through first heat exchange pipeline, the heat exchange export of first heat exchange chamber is connected with second hot stream pipeline through second heat exchange pipeline, the heat exchange import of second heat exchange chamber is connected with third hot stream pipeline through third heat exchange pipeline, the heat exchange export of second heat exchange chamber is connected with fourth hot stream pipeline through fourth heat exchange pipeline.
[0008] Further, the third cooling heat exchanger and the fourth cooling heat exchanger are further included, the third cooling heat exchanger is arranged on the second heat flow pipeline, the heat flow inlets of the third cooling heat exchanger are communicated with the heat flow outlets of the first cooling heat exchanger and the second heat exchange pipeline respectively, the heat flow outlet of the third cooling heat exchanger is communicated with the upper portion of the carbonization tank, and the fourth cooling heat exchanger is arranged on the fourth heat exchange pipeline, the heat flow inlets of the fourth cooling heat exchanger are communicated with the heat flow outlets of the second cooling heat exchanger and the fourth heat exchange pipeline respectively.
[0009] Further, the fifth cooling heat exchanger and the reflux pump are further included, the upper portion of the carbonization tank is further provided with a reflux inlet, the heat flow inlet of the fifth cooling heat exchanger is communicated with the discharge pipeline through the first reflux pipeline, and the heat flow outlet of the fifth cooling heat exchanger is communicated with the reflux inlet of the carbonization tank through the second reflux pipeline and the reflux pump.
[0010] Further, the temperature drop ranges of the first cooling heat exchanger, the second cooling heat exchanger, the third cooling heat exchanger, the fourth cooling heat exchanger and the fifth cooling heat exchanger are 1-2 DEG C.
[0011] Further, the discharge valve is arranged between the ammonium bicarbonate outlet of the carbonization tank and the preheating heat exchanger.
[0012] Further, the temperature sensor is arranged on the inner side wall of the carbonization tank, and the signal output end of the temperature sensor is connected with the discharge valve.
[0013] Compared with the prior art, the utility model has the beneficial effects that:
[0014] (1) the upper and lower two-stage cooling heat exchangers are arranged on the two sides of the carbonization tank, the ammonium bicarbonate slurry can be cooled and then returned to the carbonization tank to absorb reaction heat in the reaction process, the temperature is prevented from being too high, the volatilization of carbon dioxide is avoided, the absorption rate is small, the product yield is low, the carbon ammonium is prevented from being bonded on the inner surface of the pipeline to cause the heat exchange efficiency to be reduced, the carbon ammonium particles are facilitated to grow, and the quality of the carbon ammonium product is improved.
[0015] (2) the preheating heat exchanger is arranged on the discharge pipeline, the preheating heat exchanger can prevent the ammonium bicarbonate from being rapidly cooled after being discharged, the crystallization is prevented from being bonded on the inner surface of the discharge pipeline, and the blockage of the discharge pipeline is avoided.
[0016] (3) the reflux pipeline is further connected to the discharge pipeline, the ammonium bicarbonate slurry can be cooled and then returned to the carbonization tank under the action of the reflux pump, the cooling operation of the ammonium bicarbonate in the carbonization tank is facilitated, and the reaction efficiency of the ammonium bicarbonate is improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required by the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0018] Figure 1 The structure diagram of the multi-stage cooling device of the carbonization system is provided. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.
[0020] In order to illustrate the technical solutions of the present application, the following will be described by specific embodiments.
[0021] EMBODIMENT
[0022] Please refer to Figure 1The embodiment provides a multi-stage cooling device of a carbonization system, which comprises a carbonization tank 1, a first cooling heat exchanger 2, a second cooling heat exchanger 3, a third cooling heat exchanger 4, a fourth cooling heat exchanger 5, a preheating heat exchanger 6, a fifth cooling heat exchanger 7 and a backflow pump 8. The carbonization tank 1 is used for reacting ammonia water and carbon dioxide to generate ammonium bicarbonate slurry. An ammonia inlet 11 for inputting ammonia water is arranged at the upper part of the carbonization tank 1, a carbon dioxide inlet 12 for inputting carbon dioxide is arranged at the middle part of the carbonization tank 1, and an ammonium bicarbonate outlet 13 is arranged at the lower part of the carbonization tank 1. The first cooling heat exchanger 2 and the third cooling heat exchanger 4 are oppositely arranged with the second cooling heat exchanger 3 and the fourth cooling heat exchanger 5. The hot flow inlet of the first cooling heat exchanger 2 is connected to the lower part of the carbonization tank 1 through a first hot flow pipeline 21, the hot flow outlet of the first cooling heat exchanger 2 is connected to the upper part of the carbonization tank 1 through a second hot flow pipeline 22, the third cooling heat exchanger 4 is arranged on the second hot flow pipeline 22, the hot flow inlet of the second cooling heat exchanger 3 is connected to the lower part of the carbonization tank 1 through a third hot flow pipeline 31, the hot flow outlet of the second cooling heat exchanger 3 is connected to the upper part of the carbonization tank 1 through a fourth hot flow pipeline 32, the fourth cooling heat exchanger 5 is arranged on the fourth hot flow pipeline 32, the ammonium bicarbonate outlet 13 of the carbonization tank 1 is output through a discharge pipeline 131 and the preheating heat exchanger 6, a discharge valve 14 is arranged between the ammonium bicarbonate outlet 13 of the carbonization tank 1 and the preheating heat exchanger 6, a temperature sensor 9 is arranged on the inner side wall of the carbonization tank 1, the signal output end of the temperature sensor 9 is connected to the discharge valve 14, a first heat exchange chamber 61 and a second heat exchange chamber 62 are arranged on the two sides of the preheating heat exchanger 6, the heat exchange inlet of the first heat exchange chamber 61 is connected to the first hot flow pipeline 21 through a first heat exchange pipeline 611, the heat exchange outlet of the first heat exchange chamber 61 is connected to the second hot flow pipeline 22 through a second heat exchange pipeline 612, the hot flow inlet of the third cooling heat exchanger 4 is connected to the hot flow outlet of the first cooling heat exchanger 2 and the second heat exchange pipeline 612 respectively, the heat exchange inlet of the second heat exchange chamber 62 is connected to the third hot flow pipeline 31 through a third heat exchange pipeline 621, the heat exchange outlet of the second heat exchange chamber 62 is connected to the fourth hot flow pipeline 32 through a fourth heat exchange pipeline 622, and the hot flow inlet of the fourth cooling heat exchanger 5 is connected to the hot flow outlet of the second cooling heat exchanger 3 and the fourth heat exchange pipeline 622 respectively.
[0023] The temperature drop of the first cooling heat exchanger 2, the second cooling heat exchanger 3, the third cooling heat exchanger 4 and the fourth cooling heat exchanger 5 is 1-2 ℃.
[0024] By setting the upper and lower two-stage cooling heat exchangers on both sides of the carbonization tank 1, the ammonium bicarbonate slurry can be cooled and then returned to the carbonization tank 1 to absorb the reaction heat during the reaction, so that the temperature is not too high, the volatilization of carbon dioxide is avoided, the absorption rate is small, the product capacity is low, and the carbon ammonium is not bonded on the inner surface of the pipeline due to the small temperature drop of each stage of cooling, so that the heat exchange efficiency is reduced, and the growth of carbon ammonium particles is facilitated, and the quality of the carbon ammonium product is improved.
[0025] The preheating heat exchanger 6 is arranged on the discharge pipeline 131, which can avoid the rapid cooling of the ammonium bicarbonate after discharge, so that the crystallization is bonded on the inner surface of the discharge pipeline, and the blockage of the discharge pipeline 131 is avoided.
[0026] In the embodiment, the upper part of the carbonization tank 1 is further provided with a reflux inlet 15, the hot flow inlet of the fifth cooling heat exchanger 7 is communicated with the discharge pipeline 131 through the first reflux pipeline 71, the hot flow outlet of the fifth cooling heat exchanger 7 is communicated with the reflux inlet 15 of the carbonization tank 1 through the second reflux pipeline 72 and the reflux pump 8, and the temperature drop of the fifth cooling heat exchanger 7 is 1-2 DEG C. Under the action of the reflux pump 8, the ammonium bicarbonate slurry can be cooled and then returned to the carbonization tank 1, which is helpful for the cooling operation of the ammonium bicarbonate in the carbonization tank 1 and improves the reaction efficiency of the ammonium bicarbonate.
[0027] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A multi-stage cooling device for a carbonization system, characterized in that, The system includes a carbonization tank, a first cooling heat exchanger, a second cooling heat exchanger, and a preheating heat exchanger. The carbonization tank is used to react ammonia water with carbon dioxide to produce ammonium bicarbonate slurry. The carbonization tank has an ammonia inlet at its upper part, a carbon dioxide inlet at its middle part, and an ammonium bicarbonate outlet at its lower part. The first and second cooling heat exchangers are arranged opposite each other. The heat inlet of the first cooling heat exchanger is connected to the lower part of the carbonization tank via a first heat flow pipe, and the heat outlet of the first cooling heat exchanger is connected to the upper part of the carbonization tank via a second heat flow pipe. The heat inlet of the second cooling heat exchanger is connected to the carbonization tank via a third heat flow pipe. The lower part of the carbonization tank has its heat exchanger outlet connected to the upper part of the carbonization tank via a fourth heat exchanger pipe. The ammonium bicarbonate outlet of the carbonization tank is output through a preheating heat exchanger via a discharge pipe. The preheating heat exchanger has a first heat exchange chamber and a second heat exchange chamber on its two sides respectively. The heat exchange inlet of the first heat exchange chamber is connected to the first heat exchanger pipe via a first heat exchanger pipe. The heat exchange outlet of the first heat exchange chamber is connected to the second heat exchanger pipe via a second heat exchanger pipe. The heat exchange inlet of the second heat exchange chamber is connected to the third heat exchanger pipe via a third heat exchanger pipe. The heat exchange outlet of the second heat exchange chamber is connected to the fourth heat exchanger pipe via a fourth heat exchanger pipe.
2. The multi-stage cooling device for a carbonization system according to claim 1, characterized in that: It also includes a third cooling heat exchanger and a fourth cooling heat exchanger. The third cooling heat exchanger is installed on the second heat flow pipe. The heat flow inlet of the third cooling heat exchanger is connected to the heat flow outlet of the first cooling heat exchanger and the second heat exchange pipe, respectively. The heat flow outlet of the third cooling heat exchanger is connected to the upper part of the carbonization tank. The fourth cooling heat exchanger is installed on the fourth heat exchange pipe. The heat flow inlet of the fourth cooling heat exchanger is connected to the heat flow outlet of the second cooling heat exchanger and the fourth heat exchange pipe, respectively.
3. The multi-stage cooling device for a carbonization system according to claim 1, characterized in that: It also includes a fifth cooling heat exchanger and a reflux pump. The upper part of the carbonization tank is also provided with a reflux inlet. The hot flow inlet of the fifth cooling heat exchanger is connected to the discharge pipe through the first reflux pipe. The hot flow outlet of the fifth cooling heat exchanger is connected to the reflux inlet of the carbonization tank through the second reflux pipe and the reflux pump.
4. A multi-stage cooling device for a carbonization system according to claim 3, characterized in that: The temperature reduction range of the first, second, third, fourth, and fifth cooling heat exchangers is 1 to 2°C.
5. A multi-stage cooling device for a carbonization system according to claim 1, characterized in that: A discharge valve is installed between the ammonium bicarbonate outlet of the carbonation tank and the preheating heat exchanger.
6. A multi-stage cooling device for a carbonization system according to claim 5, characterized in that: A temperature sensor is installed on the inner wall of the carbonization tank, and the signal output terminal of the temperature sensor is connected to the discharge valve.