Hydrogen chloride gas dehydrating and cooling device

Abstract

The utility model belongs to the technical field of chemical equipment for cooling, and particularly relates to a hydrogen chloride gas dehydrating and cooling device. The hydrogen chloride gas dehydrating and cooling device comprises a hydrochloric acid synthesis furnace, a first-stage heat exchanger, a second-stage heat exchanger and a water mist catcher, the hydrochloric acid synthesis furnace is connected with the first-stage heat exchanger, the first-stage heat exchanger is connected with the second-stage heat exchanger, the second-stage heat exchanger is connected with the water mist catcher, and the water mist catcher is connected with the hydrochloric acid synthesis furnace. And the water mist catcher is connected with the sulfuric acid tower. The hydrogen chloride gas dehydrating and cooling device provided by the utility model adopts two stages of graphite heat exchangers and is additionally provided with the efficient water mist catcher, so that the temperature of hydrogen chloride gas is quickly reduced and the water content is obviously reduced, and therefore, the product quality is improved and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling chemical equipment, and particularly relates to a hydrogen chloride gas dehydration cooling device. Background Art

[0002] Hydrochloric acid production is a crucial step in the chemical industry. During this process, the hydrogen chloride gas released from the outlet of the hydrochloric acid synthesis furnace typically has a high temperature and a certain moisture content. These characteristics not only affect the efficiency of subsequent processing steps but can also damage equipment and shorten its service life. Specifically, if hydrogen chloride gas at a temperature of approximately 40°C and a pressure of 3kPa is not effectively treated and directly introduced into subsequent processes, it can lead to equipment corrosion, increased energy consumption, reduced product quality, and even pose safety risks.

[0003] Traditional methods for cooling and dehydrating hydrogen chloride gas often rely on a single heat exchanger. However, due to limited heat exchange efficiency, it is often difficult to quickly reduce the gas temperature to the required level, and the removal of moisture from the gas is ineffective. Furthermore, some systems lack effective monitoring and adjustment methods, making the entire process inflexible and unstable.

[0004] While traditional methods can achieve basic cooling and dehydration, they suffer from low heat exchange efficiency and difficulty in further reducing moisture content, impacting product quality and equipment stability. To address these issues, the industry has been exploring more efficient and stable technologies for cooling and dehydrating hydrogen chloride gas. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a hydrogen chloride gas dehydration and cooling device. By adopting a two-stage graphite heat exchanger and adding a high-efficiency water mist collector, the temperature of the hydrogen chloride gas is rapidly reduced and the water content is significantly reduced, thereby improving product quality and extending the life of the equipment.

[0006] The hydrogen chloride gas dehydration and cooling device of the utility model comprises a hydrochloric acid synthesis furnace, a primary heat exchanger, a secondary heat exchanger, and a water mist collector. The hydrochloric acid synthesis furnace is connected to the primary heat exchanger, the primary heat exchanger is connected to the secondary heat exchanger, the secondary heat exchanger is connected to the water mist collector, and the water mist collector is connected to the sulfuric acid tower.

[0007] Preferably, a filter is connected to the air inlet line of the hydrochloric acid synthesis furnace, and a chlorine pipeline and a hydrogen pipeline are provided on the filter. The filter is used to remove large particles of impurities in the gas to protect the subsequent hydrochloric acid synthesis furnace lamp holder from damage.

[0008] Preferably, the primary heat exchanger and the secondary heat exchanger are both graphite heat exchangers. The arrangement of the graphite components, the heat exchange area or the fluid channel design are all existing internal structures, mainly to improve the exchange efficiency.

[0009] Preferably, the primary heat exchanger is provided with a 1# return water pipeline and a 1# chilled water pipeline.

[0010] Further preferably, the 1# chilled water pipeline is a 7°C chilled water pipeline.

[0011] Preferably, a 1# temperature controller is provided between the first-stage heat exchanger and the second-stage heat exchanger.

[0012] Preferably, the secondary heat exchanger is provided with a 2# return water pipeline and a 2# chilled water pipeline.

[0013] Further preferably, the 2# chilled water pipeline is a -35°C calcium chloride solution water pipeline.

[0014] Further preferably, a 2# temperature controller is provided between the secondary heat exchanger and the water mist collector. A high-efficiency filter element is provided inside the water mist collector, which has high adsorption and low resistance to water vapor and can efficiently filter the tiny water mist in the hydrogen chloride gas.

[0015] The hydrogen chloride gas dehydration and cooling device of the utility model is characterized in that the raw gas provided by the chlorine pipeline and the hydrogen pipeline enters the filter to process larger impurity particles and then enters the hydrochloric acid synthesis furnace. After combustion, the gas outlet temperature is 40°C and the pressure is 3KPa. The gas first passes through the first-stage heat exchanger to exchange heat with the 1# chilled water pipeline, and the temperature of the hydrogen chloride gas is reduced by about 20°C. After heat exchange with the 2# chilled water pipeline, the temperature of the hydrogen chloride gas is reduced to about -5°C and then enters the water mist trap. The filter element of the water mist trap is used to filter out water in the hydrogen chloride gas. The hydrogen chloride gas after dehydration in the water mist trap enters the sulfuric acid drying tower.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The hydrogen chloride gas dehydration and cooling device of the present invention adopts a two-stage heat exchanger (a primary heat exchanger and a secondary heat exchanger) design to achieve multi-stage cooling and deep dehydration of hydrogen chloride gas.

[0018] (2) The hydrogen chloride gas dehydration and cooling device of the present invention removes water from the hydrogen chloride gas after two-stage cooling through a water mist collector and then passes it into a sulfuric acid drying tower, thereby reducing the water content of the hydrogen chloride gas, eliminating the disadvantage of subsequent heating in the sulfuric acid drying tower, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the hydrogen chloride gas dehydration cooling device of the present invention.

[0020] In the figure: 1. Filter; 2. Hydrochloric acid synthesis furnace; 3. Primary heat exchanger; 4. Secondary heat exchanger; 5. Water mist collector; 6. Sulfuric acid tower; 7. Chlorine pipeline; 8. Hydrogen pipeline; 9. 1# return water pipeline; 10. 1# chilled water pipeline; 11. 1# temperature controller; 12. 2# return water pipeline; 13. 2# chilled water pipeline; 14. 2# temperature controller. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to specific embodiments.

[0022] The internal structures of the filter 1, hydrochloric acid synthesis furnace 2, primary heat exchanger 3, secondary heat exchanger 4, water mist collector 5, etc. described in the present invention are all commercially available products of the prior art and are public structures, and their internal structures will not be further discussed.

[0023] like Figure 1 As shown, the hydrogen chloride gas dehydration and cooling device described in the utility model includes a hydrochloric acid synthesis furnace 2, a primary heat exchanger 3, a secondary heat exchanger 4, and a water mist collector 5. The hydrochloric acid synthesis furnace 2 is connected to the primary heat exchanger 3, the primary heat exchanger 3 is connected to the secondary heat exchanger 4, the secondary heat exchanger 4 is connected to the water mist collector 5, and the water mist collector 5 is connected to the sulfuric acid tower 6.

[0024] The air inlet line of the hydrochloric acid synthesis furnace 2 is connected to a filter 1, and a chlorine pipeline 7 and a hydrogen pipeline 8 are provided on the filter 1. The filter is used to remove large particles of impurities in the gas and protect the subsequent hydrochloric acid synthesis furnace lamp holder from damage.

[0025] The primary heat exchanger 3 and the secondary heat exchanger 4 are both graphite heat exchangers. The arrangement of the graphite components, the heat exchange area, and the fluid channel design are all existing internal structures, mainly to improve the exchange efficiency.

[0026] The primary heat exchanger 3 is provided with a 1# return water pipeline 9 and a 1# chilled water pipeline 10.

[0027] The 1# chilled water pipeline 10 is a 7°C chilled water pipeline.

[0028] A 1# temperature controller 11 is provided between the primary heat exchanger 3 and the secondary heat exchanger 4 .

[0029] The secondary heat exchanger 4 is provided with a 2# return water pipeline 12 and a 2# chilled water pipeline 13 .

[0030] The 2# chilled water pipeline 13 is a -35°C calcium chloride solution water pipeline.

[0031] A 2# temperature controller 14 is provided between the secondary heat exchanger 4 and the water mist collector 5. A high-efficiency filter element is provided inside the water mist collector 5. The filter element has high adsorption and low resistance to water vapor and can efficiently filter the tiny water mist in the hydrogen chloride gas.

[0032] The hydrogen chloride gas dehydration and cooling device of the utility model is characterized in that the raw gas provided by the chlorine pipeline and the hydrogen pipeline enters the filter to process larger impurity particles and then enters the hydrochloric acid synthesis furnace. After combustion, the gas outlet temperature is 40°C and the pressure is 3KPa. The gas first passes through the first-stage heat exchanger to exchange heat with the 1# chilled water pipeline, and the temperature of the hydrogen chloride gas is reduced by about 20°C. After heat exchange with the 2# chilled water pipeline, the temperature of the hydrogen chloride gas is reduced to about -5°C and then enters the water mist trap. The filter element of the water mist trap is used to filter out water in the hydrogen chloride gas. The hydrogen chloride gas after dehydration in the water mist trap enters the sulfuric acid drying tower.

[0033] Of course, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples. Equivalent changes and improvements made by ordinary technicians in this technical field within the essential scope of the present invention should all fall within the scope of the patent of the present invention.

Claims

1. A hydrogen chloride gas dehydration cooling device, characterized in that: The invention comprises a hydrochloric acid synthesis furnace (2), a primary heat exchanger (3), a secondary heat exchanger (4), and a water mist collector (5); the hydrochloric acid synthesis furnace (2) is connected to the primary heat exchanger (3); the primary heat exchanger (3) is connected to the secondary heat exchanger (4); the secondary heat exchanger (4) is connected to the water mist collector (5); and the water mist collector (5) is connected to a sulfuric acid tower (6).

2. The hydrogen chloride gas dehydration cooling device according to claim 1, characterized in that: The air inlet pipeline of the hydrochloric acid synthesis furnace (2) is connected to a filter (1), and the filter (1) is provided with a chlorine pipeline (7) and a hydrogen pipeline (8).

3. The hydrogen chloride gas dehydration and cooling device according to claim 1, characterized in that: The first-stage heat exchanger (3) and the second-stage heat exchanger (4) are both graphite heat exchangers.

4. The hydrogen chloride gas dehydration and cooling device according to claim 1, characterized in that: The first-stage heat exchanger (3) is provided with a 1# return water pipeline (9) and a 1# chilled water pipeline (10).

5. The hydrogen chloride gas dehydration and cooling device according to claim 4, characterized in that: The 1# chilled water pipeline (10) is a 7°C chilled water pipeline.

6. The hydrogen chloride gas dehydration and cooling device according to claim 1, characterized in that: A 1# temperature controller (11) is provided between the first-stage heat exchanger (3) and the second-stage heat exchanger (4).

7. The hydrogen chloride gas dehydration and cooling device according to claim 1, characterized in that: The secondary heat exchanger (4) is provided with a 2# return water pipeline (12) and a 2# chilled water pipeline (13).

8. The hydrogen chloride gas dehydration and cooling device according to claim 7, characterized in that: The 2# chilled water pipeline (13) is a calcium chloride solution water pipeline at -35°C.

9. The hydrogen chloride gas dehydration and cooling device according to claim 7, characterized in that: A 2# temperature controller (14) is provided between the secondary heat exchanger (4) and the water mist collector (5).

Images