CN212855301U - Ammonia water evaporator for denitration - Google Patents
Ammonia water evaporator for denitration Download PDFInfo
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- CN212855301U CN212855301U CN202021539976.3U CN202021539976U CN212855301U CN 212855301 U CN212855301 U CN 212855301U CN 202021539976 U CN202021539976 U CN 202021539976U CN 212855301 U CN212855301 U CN 212855301U
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Abstract
The utility model discloses an ammonia evaporator for denitration, including braced frame, evaporation heat transfer face, differential pressure liquid level transmitter, pressure transmitter, import adjusting valve, export control flap, lateral pipeline adjusting valve, blowdown valve and safe discharge device. The contact part of the evaporation heat exchange surface and the flue gas is of an integral non-welding structure, and is welded with the support frame in a fully-sealed way; each pipe of the evaporation heat exchange surface can be independently controlled by the branch pipeline adjusting valve; the differential pressure liquid level transmitter, the pressure transmitter, the inlet regulating valve, the outlet control valve, the sewage discharge valve and the safety relief device are connected with the evaporation heat exchange surface through flanges. The utility model discloses can realize that the operation of ammonia water evaporimeter is more stable safe, improve ammonia water evaporimeter's evaporation capacity adjustability, the ammonia of evaporation out can mix more fully with the flue gas, and the denitration is efficient, and economic nature is good.
Description
Technical Field
The utility model relates to a flue gas denitration technical field specifically is an ammonia water evaporimeter for denitration.
Background
At present, the flue gas denitration technology in the environmental protection industry, especially the SCR method denitration in the coking industry and iron and steel enterprises, mainly adopts ammonia water evaporated ammonia gas as a reducing agent to carry out flue gas denitration treatment. The ammonia water evaporator is used as key equipment for evaporating ammonia gas, and the function of the ammonia water evaporator in a denitration system is very important. The ammonia water evaporator is mainly characterized in that ammonia water is heated by hot flue gas, steam or other high-temperature fluid to become mixed steam of ammonia and water, and the mixed steam is sprayed into a flue and mixed with the flue gas to carry out denitration reaction. Due to the limitation of manufacturing materials and manufacturing processes, the body is easy to crack and leak ammonia water after working for a period of time, and adverse effects are caused on the safe and stable operation of the denitration system; the amount of ammonia vapor generated by the ammonia water evaporator is difficult to control; the ammonia that produces easily condenses the liquefaction in pipeline transportation process, influences the homogeneity that ammonia and flue gas mix, seriously influences denitration efficiency, causes the incident even.
Disclosure of Invention
The utility model provides an ammonia evaporator for denitration, which can solve the problems of the ammonia evaporator in the background technology, realize the stable operation of the ammonia evaporator and the accurate control of the ammonia gas production; the degree of superheat of the generated ammonia gas is improved.
In order to achieve the above object, the utility model provides a following scheme: an ammonia evaporator for denitration comprises a supporting frame 1, an evaporation heat exchange surface 2, a differential pressure liquid level transmitter 3, a pressure transmitter 4, an inlet adjusting valve 5, a sewage discharge valve 6, a safety discharge device 7, an outlet control valve 8 and a branch pipeline adjusting valve 9.
The contact part of the evaporation heat exchange surface 2 and the flue gas has no splicing welding line; the inlet of each branch pipe of the evaporation heat exchange surface 2 is provided with a branch pipe adjusting valve 9 through threaded connection, and the high-pressure interface and the low-pressure interface of the differential pressure liquid level transmitter 3 are respectively connected with the lower part and the upper part of the evaporation heat exchange surface 2 through flanges; the pressure transmitter 4 and the safety relief device 7 are connected to the top of the evaporation heat exchange surface 2 through flanges; an inlet adjusting valve 5 is arranged at the inlet of the evaporation heat exchange surface 2, and an outlet control valve 8 is arranged at the outlet; each pipe of the evaporation heat exchange surface is separately provided with a branch pipeline adjusting valve 9 through threaded connection, and the lower part of the evaporation heat exchange surface 2 is provided with a sewage valve 6 through a flange.
Because the utility model adopts the above proposal, the contact part of the evaporation heat exchange surface 2 and the flue gas adopts an integral non-welding structure, thereby solving the problems of weld opening cracking and ammonia water leakage; the installation of the differential pressure liquid level transmitter 3, the pressure transmitter 4, the inlet regulating valve 5 and the branch pipeline regulating valve 9 can accurately control the liquid level in the ammonia evaporator and the evaporation capacity of ammonia gas, and can realize accurate control according to load change; meanwhile, the superheat degree of ammonia vapor can be controlled through the accurate control of the liquid level, and condensation liquefaction is avoided.
Drawings
FIG. 1 is a schematic structural view of the ammonia water evaporator for denitration according to the present invention.
Detailed Description
The present invention will be described in detail with reference to fig. 1, which is a schematic structural view of an ammonia water evaporator for denitration according to an embodiment of the present invention.
The ammonia water evaporator for denitration shown in fig. 1 comprises a supporting frame 1, an evaporation heat exchange surface 2, a differential pressure liquid level transmitter 3, a pressure transmitter 4, an inlet adjusting valve 5, a sewage discharge valve 6, a safety discharge device 7, an outlet control valve 8 and a branch pipeline adjusting valve 9.
The contact part of the evaporation heat exchange surface 2 and the flue gas has no splicing welding line; the inlet of each branch pipe of the evaporation heat exchange surface 2 is provided with a branch pipe adjusting valve 9 through threaded connection, and the high-pressure interface and the low-pressure interface of the differential pressure liquid level transmitter 3 are respectively connected with the lower part and the upper part of the evaporation heat exchange surface 2 through flanges; the pressure transmitter 4 and the safety relief device 7 are connected to the top of the evaporation heat exchange surface 2 through flanges; an inlet adjusting valve 5 is arranged at the inlet of the evaporation heat exchange surface 2, and an outlet control valve 8 is arranged at the outlet; a branch pipeline adjusting valve 9 is independently installed on each pipe of the evaporation heat exchange surface 2 through threaded connection, and a sewage discharge valve 6 is installed on the lower portion of the evaporation heat exchange surface 2 through a flange.
The working process is as follows: ammonia water enters a distribution pipe at the bottom of the evaporation heat exchange surface 2 from an inlet adjusting valve 5, then enters each branch pipeline through a branch pipeline adjusting valve 9, and exchanges heat with external hot fluid at the lower part of each branch pipeline for evaporation to generate ammonia steam; the ammonia vapor is further heated by the upper section of the evaporation heat exchange surface 2 to form superheated ammonia vapor, which is then fed into the delivery line by adjusting the outlet control valve 8. The opening degree of the inlet regulating valve 5 and the opening degree of each branch pipeline regulating valve 9 can be adjusted through the real-time monitoring values of the differential pressure liquid level meter transmitter 3 and the pressure transmitter 4; the safety relief device 7 can set a setting pressure, and when the setting pressure is exceeded, the relief is automatically carried out, so that the structural safety is ensured.
The foregoing description of the embodiments is provided for the purpose of illustration and description, and is not intended to be the only implementation. Therefore, improvements and modifications without departing from the scope of the present invention should be considered within the scope of the present invention.
Claims (1)
1. The utility model provides an ammonia evaporator for denitration, includes braced frame (1), evaporation heat transfer face (2), differential pressure level transmitter (3), pressure transmitter (4), import adjusting valve (5), blowdown valve (6), safety bleeder mechanism (7), export control flap (8), lateral line adjusting valve (9), its characterized in that: the contact part of the evaporation heat exchange surface (2) and the flue gas has no splicing welding line; the high-pressure interface and the low-pressure interface of the differential pressure liquid level transmitter (3) are respectively connected with the lower part and the upper part of the evaporation heat exchange surface (2) through flanges; the pressure transmitter (4) and the safety relief device (7) are connected to the top of the evaporation heat exchange surface (2) through flanges; an inlet adjusting valve (5) is arranged at the inlet of the evaporation heat exchange surface (2), and an outlet control valve (8) is arranged at the outlet; a branch pipeline adjusting valve (9) is independently installed on each pipe of the evaporation heat exchange surface (2) through threaded connection, and a drain valve (6) is installed on the lower portion of the evaporation heat exchange surface (2) through a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021539976.3U CN212855301U (en) | 2020-07-30 | 2020-07-30 | Ammonia water evaporator for denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021539976.3U CN212855301U (en) | 2020-07-30 | 2020-07-30 | Ammonia water evaporator for denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212855301U true CN212855301U (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021539976.3U Active CN212855301U (en) | 2020-07-30 | 2020-07-30 | Ammonia water evaporator for denitration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212855301U (en) |
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2020
- 2020-07-30 CN CN202021539976.3U patent/CN212855301U/en active Active
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