How many years of history and culture does Haiyan have, and the origin of the name Haiyan Historical

Salt is a necessity for human survival. Humans have a long history of collecting and producing salt, starting with the collection of salt flowers that crystallize naturally on beaches, natural brine and rock salt from salt lakes, and salt springs and rock salt outcropping from the ground, and then to artificial production. According to written records, China has used seawater to produce salt more than 5,000 years ago, lake salt more than 4,000 years ago, and dug wells to extract underground natural brine to make salt more than 2,000 years ago.

The production of sea salt is first scraped from salty soil, drenched and fried salt, and gradually changed to salt pan drying. Some of the lake salt is directly harvested, and some are dried using salt lake brine. In the production of well salt, the sinking of the well is from shallow to deep, and the mining of natural brine is gradually developed from the fishing method to the self-blowing well method, the gas lift method and the use of deep well submersible brine pump; Rock salt was first directly mined (dry mining), and later most of it was mined by drilling water solubility method (water mining); The formation of brine into salt has developed from round pot and frying pan decoction to vacuum evaporation and hot pressure evaporation.

The production of all kinds of salt has undergone a development process from manual small-scale production to mechanized and modern large-scale production.

Through a series of processes, the water in seawater is evaporated to obtain sea salt. The traditional method of extracting salt from seawater is the "salt pan method". The enhanced evaporation method of seawater salt drying is related to liquid evaporation technology.

In the past, seawater evaporation and salt drying all adopt the method of plane evaporation, and the contact area of salt water and the flowing water vapor unsaturated air is limited to the plane area of the salt pan, and the invention is sprinkled with brine at a certain height, or the brine is sprayed at a certain pressure and at a certain height, and the contact area of brine solution and the flowing water vapor unsaturated air is expanded in a three-dimensional way, the evaporation area is increased, the evaporation is strengthened, the evaporation cycle is shortened and the evaporation efficiency of brine is improved.

At present, the main method of extracting salt from seawater is the "salt pan method", which is an ancient method that is still widely used today. Use the method. It is necessary to select large areas of flat seaside tidal flats in areas with mild climate and abundant sunlight to build salt pans.

The salt pan is usually divided into two parts: the evaporation pond and the crystallized medium and large pond. First, the seawater (or seawater underground brine) is introduced into the evaporation pool, and when the water is evaporated to a certain extent by sun exposure, the seawater will become a saturated solution of salt when it is introduced into the crystallization pool and continued to be sunburned, and the salt will gradually precipitate out when it is sold vertically and then sunned.

The crystals obtained at this time are our common "coarse salt". The remaining liquid is called the mother liquor (also known as "bitter brine"), from which multiple chemical feedstocks can be extracted.

Sea salt is formed by volcanic eruptions and rainfall that accumulate in large quantities in the ocean.

In the sunny salt sea area, the sun and wind can evaporate the seawater of the salt pan to obtain salt, simply put, the particles of sea salt are relatively coarse, and it is the primary salt that has not been processed;

Whereas, ordinary salt is processed and remade.

Because sea salt has a higher mineral content, it contains more ingredients than ordinary salt.

Sea salt is formed and produced from volcanic eruptions and rainfall, so large amounts of salt can accumulate in the ocean and accumulate over time to form sea salt. In sunny salt sea areas, the sun and wind can evaporate the seawater in the salt pans to obtain salt. In conclusion, sea salt grains are relatively coarse and are unprocessed primary salts; Whereas ordinary salt is processed and reprocessed.

Causes of sea salt.

The vast oceans cover 70% of the Earth's surface area, and the seawater in the oceans accounts for 97% of the total weight of the Earth's waters. The total salinity in seawater is Baumé, i.e. 1 The salt content in seawater is 35 grams.

Yancheng Yandu Park is located in Yancheng Tinghu District, Yancheng City, Yancheng Yandu version of the Jianjian block, named after the name on December 16, 2006, formerly known as Huanghai Park, is an important part of Yancheng Chuanchang River Landscape Belt. It is south of Qingnian Road, east of Renmin Road, north of Dongjin Road, and west of Binhe Road. The ancient salt river and the Kushiba River pass through the park.

The total area is 1129 acres. It is the second largest wetland park in Yancheng City after Dayang Bay Ecological Sports Park.

Yancheng is a veritable "salt" city. Yancheng from the Western Han Dynasty Emperor Wu Yuanjia 4 years (119 B.C.) to establish Yandu County, at that time here everywhere for boiling salt pavilions, everywhere is the salt river, "desecration" is the meaning of the river of transporting salt.

Yancheng has experienced more than 2,000 years of historical precipitation, and exudes a strong Haiyan culture everywhere. In ancient times, it was famous in China for its abundance of "Huai salt", and it was called "Huaiyi Land" in ancient times. As early as the Warring States Period, "boiling the sea for salt", "Historical Records" recorded that "the East China Sea has the rao of sea salt".

In the Qin and Han dynasties, it was "boiling the sea for profit, passing through the canal and transporting", and it has become a prosperous place for fishing and salt. In the Tang Dynasty, the Huainan Salt Farm, which was "rich in the southeast of the first and half of the border salary", had "one hundred and twenty-three salt pavilions" in Yancheng alone. During the Tang Baoying period, there were Hailing Supervisor and Yancheng Supervisor in the territory, and the socks were boiled more than 100,000 stones per year, and Yancheng had become an important salt production center on the southeast coast at that time.

The construction of Yandu Park is very complex and difficult. First, the geological conditions are poor. The ground in the park is silt soil after the meter downward, it is difficult to pile up, dig and transport, and the excavated soil can not be directly used for terrain accumulation, it must be dried before it can be used, and it will be repeated again in case of rain.

Second, there are many parallel construction teams.

Taking soil improvement as an example, the soil in the Yandu Park area has poor permeability, heavy stickiness and low organic matter content, which is not only difficult to terrain transformation, but also not suitable for planting plants at all. Experts were specially invited from Nanjing to guide the soil improvement work, all the more than 700 acres of soil in the park were dug deep and sunburned and oxidized, 100,000 cubic meters of sand were transported from Nanyang Town, and the surface layer of 60 cm of soil was paved, and chicken manure, good phosphorus fertilizer and 5,000 square meters of peat transported from the northeast were fully stirred, which increased the permeability and fertility of the soil, and ensured the survival rate of tree planting and the conditions for plant growth in the future. In order to solve the problem of soil drainage, on the basis of the existing drainage systems such as sewage and rainwater, blind ditches are buried every 8 meters wide and 8 meters long under the park to ensure smooth greening and drainage and prevent waterlogging.

The large scale of construction and high quality standards of Yandu Park can be called a great feat in the history of Yancheng urban construction.

Sea salt is located on the coast and produces table salt. "Taiping Huanyu Ji" volume 95 "Haiyan County (South Ninety Li, Yuan Ten Townships), Benwu County, Wuyuan Township." Qinzhi Haiyan County, Han because of it, belongs to Huiji County.

According to (Wu Junji) clouds, the seashore is widely reprimanded, and the salt pans face each other, that is, the sea salt and the land of salt officials are the same. "Today, although the Haiyan salt industry has been deposed, traces of salt production in history can still be seen from some coastal place names such as Changqian, Wutuan, Batuan, Beituan and Tangjiatuan.

Haiyan County is one of the birthplaces of Songze culture, and more than 5,000 years ago, there were ancestors engaged in farming, animal husbandry, fishing and hunting activities in the county. In the twenty-fifth year of the reign of King Qin (222 B.C.), he placed the county. It is named because of "the seashore is widely reprimanded, and the salt pans face each other".

Since the establishment of the county, Haiyan has been governed by four migrations of the county, and its territory has been analyzed. At the end of the Qin Dynasty, the county was ruled as a lake (Zhehu) and moved to Wuyuan Township (outside the east gate of Pinghu City). In the Eastern Han Dynasty Yongjian (126-131), the county government fell into a lake (danghu) and moved south to the mountain side of Qijing Township.

In the fifth to eighth years of Jian'an (200-203), the southwest border of Haiyan was analyzed, and Haichang County (now Haining City) was placed in the south of the fist. In the seventh year of Jin Xiankang (341), the county was moved to Ma Zhicheng. In the sixth year of Liang Tianjian of the Southern Dynasty (507), the northeast border of Xixian County was placed in Qianjing County.

From the sixth year of Datong in Liangzhong (534) to the first year of Datong (535), the northeast border of the county was placed in Xupu County. In the fifth year of Tang Kaiyuan (717), the county was moved to the present place. In the tenth year of Tianbao (751), the northern border of Haiyan, the eastern border of Jiaxing, and the southern border of Kunshan were placed in Huating County.

In the first year of Yuan Yuanzhen (1295), it was promoted to Haiyan Prefecture. In the second year of Hongwu in the Ming Dynasty (1369), it was reverted to a county. In the fifth year of Xuande (1430), the four townships of Wuyuan, Qijing, Huating and Dayi were placed in Pinghu County.

Haiyan In the twenty-fifth year of the reign of King Qin (222 B.C.), it was named because of "the seashore is widely reprimanded, and the salt fields face each other".